sound/core/pcm_native.c

   1 /*
   2  *  Digital Audio (PCM) abstract layer
   3  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
   4  *
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  19  *
  20  */
  21
  22 #include <linux/mm.h>
  23 #include <linux/module.h>
  24 #include <linux/file.h>
  25 #include <linux/slab.h>
  26 #include <linux/time.h>
  27 #include <linux/pm_qos.h>
  28 #include <linux/aio.h>
  29 #include <linux/dma-mapping.h>
  30 #include <sound/core.h>
  31 #include <sound/control.h>
  32 #include <sound/info.h>
  33 #include <sound/pcm.h>
  34 #include <sound/pcm_params.h>
  35 #include <sound/timer.h>
  36 #include <sound/minors.h>
  37 #include <asm/io.h>
  38
  39 /*
  40  *  Compatibility
  41  */
  42
  43 struct snd_pcm_hw_params_old {
  44         unsigned int flags;
  45         unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
  46                            SNDRV_PCM_HW_PARAM_ACCESS + 1];
  47         struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
  48                                         SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
  49         unsigned int rmask;
  50         unsigned int cmask;
  51         unsigned int info;
  52         unsigned int msbits;
  53         unsigned int rate_num;
  54         unsigned int rate_den;
  55         snd_pcm_uframes_t fifo_size;
  56         unsigned char reserved[64];
  57 };
  58
  59 #ifdef CONFIG_SND_SUPPORT_OLD_API
  60 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
  61 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
  62
  63 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
  64                                       struct snd_pcm_hw_params_old __user * _oparams);
  65 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
  66                                       struct snd_pcm_hw_params_old __user * _oparams);
  67 #endif
  68 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
  69
  70 /*
  71  *
  72  */
  73
  74 static DEFINE_RWLOCK(snd_pcm_link_rwlock);
  75 static DECLARE_RWSEM(snd_pcm_link_rwsem);
  76
  77 /**
  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                 if (!hw_support_mmap(substream))
 425                         params->info &= ~(SNDRV_PCM_INFO_MMAP |
 426                                           SNDRV_PCM_INFO_MMAP_VALID);
 427         }
 428         if (!params->fifo_size) {
 429                 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
 430                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
 431                 if (snd_mask_min(m) == snd_mask_max(m) &&
 432                     snd_interval_min(i) == snd_interval_max(i)) {
 433                         changed = substream->ops->ioctl(substream,
 434                                         SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
 435                         if (changed < 0)
 436                                 return changed;
 437                 }
 438         }
 439         params->rmask = 0;
 440         return 0;
 441 }
 442
 443 EXPORT_SYMBOL(snd_pcm_hw_refine);
 444
 445 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
 446                                   struct snd_pcm_hw_params __user * _params)
 447 {
 448         struct snd_pcm_hw_params *params;
 449         int err;
 450
 451         params = memdup_user(_params, sizeof(*params));
 452         if (IS_ERR(params))
 453                 return PTR_ERR(params);
 454
 455         err = snd_pcm_hw_refine(substream, params);
 456         if (copy_to_user(_params, params, sizeof(*params))) {
 457                 if (!err)
 458                         err = -EFAULT;
 459         }
 460
 461         kfree(params);
 462         return err;
 463 }
 464
 465 static int period_to_usecs(struct snd_pcm_runtime *runtime)
 466 {
 467         int usecs;
 468
 469         if (! runtime->rate)
 470                 return -1; /* invalid */
 471
 472         /* take 75% of period time as the deadline */
 473         usecs = (750000 / runtime->rate) * runtime->period_size;
 474         usecs += ((750000 % runtime->rate) * runtime->period_size) /
 475                 runtime->rate;
 476
 477         return usecs;
 478 }
 479
 480 static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state)
 481 {
 482         snd_pcm_stream_lock_irq(substream);
 483         if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED)
 484                 substream->runtime->status->state = state;
 485         snd_pcm_stream_unlock_irq(substream);
 486 }
 487
 488 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
 489                              struct snd_pcm_hw_params *params)
 490 {
 491         struct snd_pcm_runtime *runtime;
 492         int err, usecs;
 493         unsigned int bits;
 494         snd_pcm_uframes_t frames;
 495
 496         if (PCM_RUNTIME_CHECK(substream))
 497                 return -ENXIO;
 498         runtime = substream->runtime;
 499         snd_pcm_stream_lock_irq(substream);
 500         switch (runtime->status->state) {
 501         case SNDRV_PCM_STATE_OPEN:
 502         case SNDRV_PCM_STATE_SETUP:
 503         case SNDRV_PCM_STATE_PREPARED:
 504                 break;
 505         default:
 506                 snd_pcm_stream_unlock_irq(substream);
 507                 return -EBADFD;
 508         }
 509         snd_pcm_stream_unlock_irq(substream);
 510 #if IS_ENABLED(CONFIG_SND_PCM_OSS)
 511         if (!substream->oss.oss)
 512 #endif
 513                 if (atomic_read(&substream->mmap_count))
 514                         return -EBADFD;
 515
 516         params->rmask = ~0U;
 517         err = snd_pcm_hw_refine(substream, params);
 518         if (err < 0)
 519                 goto _error;
 520
 521         err = snd_pcm_hw_params_choose(substream, params);
 522         if (err < 0)
 523                 goto _error;
 524
 525         if (substream->ops->hw_params != NULL) {
 526                 err = substream->ops->hw_params(substream, params);
 527                 if (err < 0)
 528                         goto _error;
 529         }
 530
 531         runtime->access = params_access(params);
 532         runtime->format = params_format(params);
 533         runtime->subformat = params_subformat(params);
 534         runtime->channels = params_channels(params);
 535         runtime->rate = params_rate(params);
 536         runtime->period_size = params_period_size(params);
 537         runtime->periods = params_periods(params);
 538         runtime->buffer_size = params_buffer_size(params);
 539         runtime->info = params->info;
 540         runtime->rate_num = params->rate_num;
 541         runtime->rate_den = params->rate_den;
 542         runtime->no_period_wakeup =
 543                         (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
 544                         (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
 545
 546         bits = snd_pcm_format_physical_width(runtime->format);
 547         runtime->sample_bits = bits;
 548         bits *= runtime->channels;
 549         runtime->frame_bits = bits;
 550         frames = 1;
 551         while (bits % 8 != 0) {
 552                 bits *= 2;
 553                 frames *= 2;
 554         }
 555         runtime->byte_align = bits / 8;
 556         runtime->min_align = frames;
 557
 558         /* Default sw params */
 559         runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
 560         runtime->period_step = 1;
 561         runtime->control->avail_min = runtime->period_size;
 562         runtime->start_threshold = 1;
 563         runtime->stop_threshold = runtime->buffer_size;
 564         runtime->silence_threshold = 0;
 565         runtime->silence_size = 0;
 566         runtime->boundary = runtime->buffer_size;
 567         while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
 568                 runtime->boundary *= 2;
 569
 570         snd_pcm_timer_resolution_change(substream);
 571         snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP);
 572
 573         if (pm_qos_request_active(&substream->latency_pm_qos_req))
 574                 pm_qos_remove_request(&substream->latency_pm_qos_req);
 575         if ((usecs = period_to_usecs(runtime)) >= 0)
 576                 pm_qos_add_request(&substream->latency_pm_qos_req,
 577                                    PM_QOS_CPU_DMA_LATENCY, usecs);
 578         return 0;
 579  _error:
 580         /* hardware might be unusable from this time,
 581            so we force application to retry to set
 582            the correct hardware parameter settings */
 583         snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
 584         if (substream->ops->hw_free != NULL)
 585                 substream->ops->hw_free(substream);
 586         return err;
 587 }
 588
 589 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
 590                                   struct snd_pcm_hw_params __user * _params)
 591 {
 592         struct snd_pcm_hw_params *params;
 593         int err;
 594
 595         params = memdup_user(_params, sizeof(*params));
 596         if (IS_ERR(params))
 597                 return PTR_ERR(params);
 598
 599         err = snd_pcm_hw_params(substream, params);
 600         if (copy_to_user(_params, params, sizeof(*params))) {
 601                 if (!err)
 602                         err = -EFAULT;
 603         }
 604
 605         kfree(params);
 606         return err;
 607 }
 608
 609 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
 610 {
 611         struct snd_pcm_runtime *runtime;
 612         int result = 0;
 613
 614         if (PCM_RUNTIME_CHECK(substream))
 615                 return -ENXIO;
 616         runtime = substream->runtime;
 617         snd_pcm_stream_lock_irq(substream);
 618         switch (runtime->status->state) {
 619         case SNDRV_PCM_STATE_SETUP:
 620         case SNDRV_PCM_STATE_PREPARED:
 621                 break;
 622         default:
 623                 snd_pcm_stream_unlock_irq(substream);
 624                 return -EBADFD;
 625         }
 626         snd_pcm_stream_unlock_irq(substream);
 627         if (atomic_read(&substream->mmap_count))
 628                 return -EBADFD;
 629         if (substream->ops->hw_free)
 630                 result = substream->ops->hw_free(substream);
 631         snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
 632         pm_qos_remove_request(&substream->latency_pm_qos_req);
 633         return result;
 634 }
 635
 636 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
 637                              struct snd_pcm_sw_params *params)
 638 {
 639         struct snd_pcm_runtime *runtime;
 640         int err;
 641
 642         if (PCM_RUNTIME_CHECK(substream))
 643                 return -ENXIO;
 644         runtime = substream->runtime;
 645         snd_pcm_stream_lock_irq(substream);
 646         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 647                 snd_pcm_stream_unlock_irq(substream);
 648                 return -EBADFD;
 649         }
 650         snd_pcm_stream_unlock_irq(substream);
 651
 652         if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
 653                 return -EINVAL;
 654         if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12) &&
 655             params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST)
 656                 return -EINVAL;
 657         if (params->avail_min == 0)
 658                 return -EINVAL;
 659         if (params->silence_size >= runtime->boundary) {
 660                 if (params->silence_threshold != 0)
 661                         return -EINVAL;
 662         } else {
 663                 if (params->silence_size > params->silence_threshold)
 664                         return -EINVAL;
 665                 if (params->silence_threshold > runtime->buffer_size)
 666                         return -EINVAL;
 667         }
 668         err = 0;
 669         snd_pcm_stream_lock_irq(substream);
 670         runtime->tstamp_mode = params->tstamp_mode;
 671         if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12))
 672                 runtime->tstamp_type = params->tstamp_type;
 673         runtime->period_step = params->period_step;
 674         runtime->control->avail_min = params->avail_min;
 675         runtime->start_threshold = params->start_threshold;
 676         runtime->stop_threshold = params->stop_threshold;
 677         runtime->silence_threshold = params->silence_threshold;
 678         runtime->silence_size = params->silence_size;
 679         params->boundary = runtime->boundary;
 680         if (snd_pcm_running(substream)) {
 681                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 682                     runtime->silence_size > 0)
 683                         snd_pcm_playback_silence(substream, ULONG_MAX);
 684                 err = snd_pcm_update_state(substream, runtime);
 685         }
 686         snd_pcm_stream_unlock_irq(substream);
 687         return err;
 688 }
 689
 690 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
 691                                   struct snd_pcm_sw_params __user * _params)
 692 {
 693         struct snd_pcm_sw_params params;
 694         int err;
 695         if (copy_from_user(&params, _params, sizeof(params)))
 696                 return -EFAULT;
 697         err = snd_pcm_sw_params(substream, &params);
 698         if (copy_to_user(_params, &params, sizeof(params)))
 699                 return -EFAULT;
 700         return err;
 701 }
 702
 703 int snd_pcm_status(struct snd_pcm_substream *substream,
 704                    struct snd_pcm_status *status)
 705 {
 706         struct snd_pcm_runtime *runtime = substream->runtime;
 707
 708         snd_pcm_stream_lock_irq(substream);
 709         status->state = runtime->status->state;
 710         status->suspended_state = runtime->status->suspended_state;
 711         if (status->state == SNDRV_PCM_STATE_OPEN)
 712                 goto _end;
 713         status->trigger_tstamp = runtime->trigger_tstamp;
 714         if (snd_pcm_running(substream)) {
 715                 snd_pcm_update_hw_ptr(substream);
 716                 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
 717                         status->tstamp = runtime->status->tstamp;
 718                         status->audio_tstamp =
 719                                 runtime->status->audio_tstamp;
 720                         goto _tstamp_end;
 721                 }
 722         }
 723         snd_pcm_gettime(runtime, &status->tstamp);
 724  _tstamp_end:
 725         status->appl_ptr = runtime->control->appl_ptr;
 726         status->hw_ptr = runtime->status->hw_ptr;
 727         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 728                 status->avail = snd_pcm_playback_avail(runtime);
 729                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
 730                     runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
 731                         status->delay = runtime->buffer_size - status->avail;
 732                         status->delay += runtime->delay;
 733                 } else
 734                         status->delay = 0;
 735         } else {
 736                 status->avail = snd_pcm_capture_avail(runtime);
 737                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
 738                         status->delay = status->avail + runtime->delay;
 739                 else
 740                         status->delay = 0;
 741         }
 742         status->avail_max = runtime->avail_max;
 743         status->overrange = runtime->overrange;
 744         runtime->avail_max = 0;
 745         runtime->overrange = 0;
 746  _end:
 747         snd_pcm_stream_unlock_irq(substream);
 748         return 0;
 749 }
 750
 751 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
 752                                struct snd_pcm_status __user * _status)
 753 {
 754         struct snd_pcm_status status;
 755         int res;
 756
 757         memset(&status, 0, sizeof(status));
 758         res = snd_pcm_status(substream, &status);
 759         if (res < 0)
 760                 return res;
 761         if (copy_to_user(_status, &status, sizeof(status)))
 762                 return -EFAULT;
 763         return 0;
 764 }
 765
 766 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
 767                                 struct snd_pcm_channel_info * info)
 768 {
 769         struct snd_pcm_runtime *runtime;
 770         unsigned int channel;
 771
 772         channel = info->channel;
 773         runtime = substream->runtime;
 774         snd_pcm_stream_lock_irq(substream);
 775         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 776                 snd_pcm_stream_unlock_irq(substream);
 777                 return -EBADFD;
 778         }
 779         snd_pcm_stream_unlock_irq(substream);
 780         if (channel >= runtime->channels)
 781                 return -EINVAL;
 782         memset(info, 0, sizeof(*info));
 783         info->channel = channel;
 784         return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
 785 }
 786
 787 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
 788                                      struct snd_pcm_channel_info __user * _info)
 789 {
 790         struct snd_pcm_channel_info info;
 791         int res;
 792
 793         if (copy_from_user(&info, _info, sizeof(info)))
 794                 return -EFAULT;
 795         res = snd_pcm_channel_info(substream, &info);
 796         if (res < 0)
 797                 return res;
 798         if (copy_to_user(_info, &info, sizeof(info)))
 799                 return -EFAULT;
 800         return 0;
 801 }
 802
 803 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
 804 {
 805         struct snd_pcm_runtime *runtime = substream->runtime;
 806         if (runtime->trigger_master == NULL)
 807                 return;
 808         if (runtime->trigger_master == substream) {
 809                 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
 810         } else {
 811                 snd_pcm_trigger_tstamp(runtime->trigger_master);
 812                 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
 813         }
 814         runtime->trigger_master = NULL;
 815 }
 816
 817 struct action_ops {
 818         int (*pre_action)(struct snd_pcm_substream *substream, int state);
 819         int (*do_action)(struct snd_pcm_substream *substream, int state);
 820         void (*undo_action)(struct snd_pcm_substream *substream, int state);
 821         void (*post_action)(struct snd_pcm_substream *substream, int state);
 822 };
 823
 824 /*
 825  *  this functions is core for handling of linked stream
 826  *  Note: the stream state might be changed also on failure
 827  *  Note2: call with calling stream lock + link lock
 828  */
 829 static int snd_pcm_action_group(struct action_ops *ops,
 830                                 struct snd_pcm_substream *substream,
 831                                 int state, int do_lock)
 832 {
 833         struct snd_pcm_substream *s = NULL;
 834         struct snd_pcm_substream *s1;
 835         int res = 0, depth = 1;
 836
 837         snd_pcm_group_for_each_entry(s, substream) {
 838                 if (do_lock && s != substream) {
 839                         if (s->pcm->nonatomic)
 840                                 mutex_lock_nested(&s->self_group.mutex, depth);
 841                         else
 842                                 spin_lock_nested(&s->self_group.lock, depth);
 843                         depth++;
 844                 }
 845                 res = ops->pre_action(s, state);
 846                 if (res < 0)
 847                         goto _unlock;
 848         }
 849         snd_pcm_group_for_each_entry(s, substream) {
 850                 res = ops->do_action(s, state);
 851                 if (res < 0) {
 852                         if (ops->undo_action) {
 853                                 snd_pcm_group_for_each_entry(s1, substream) {
 854                                         if (s1 == s) /* failed stream */
 855                                                 break;
 856                                         ops->undo_action(s1, state);
 857                                 }
 858                         }
 859                         s = NULL; /* unlock all */
 860                         goto _unlock;
 861                 }
 862         }
 863         snd_pcm_group_for_each_entry(s, substream) {
 864                 ops->post_action(s, state);
 865         }
 866  _unlock:
 867         if (do_lock) {
 868                 /* unlock streams */
 869                 snd_pcm_group_for_each_entry(s1, substream) {
 870                         if (s1 != substream) {
 871                                 if (s1->pcm->nonatomic)
 872                                         mutex_unlock(&s1->self_group.mutex);
 873                                 else
 874                                         spin_unlock(&s1->self_group.lock);
 875                         }
 876                         if (s1 == s)    /* end */
 877                                 break;
 878                 }
 879         }
 880         return res;
 881 }
 882
 883 /*
 884  *  Note: call with stream lock
 885  */
 886 static int snd_pcm_action_single(struct action_ops *ops,
 887                                  struct snd_pcm_substream *substream,
 888                                  int state)
 889 {
 890         int res;
 891
 892         res = ops->pre_action(substream, state);
 893         if (res < 0)
 894                 return res;
 895         res = ops->do_action(substream, state);
 896         if (res == 0)
 897                 ops->post_action(substream, state);
 898         else if (ops->undo_action)
 899                 ops->undo_action(substream, state);
 900         return res;
 901 }
 902
 903 /* call in mutex-protected context */
 904 static int snd_pcm_action_mutex(struct action_ops *ops,
 905                                 struct snd_pcm_substream *substream,
 906                                 int state)
 907 {
 908         int res;
 909
 910         if (snd_pcm_stream_linked(substream)) {
 911                 if (!mutex_trylock(&substream->group->mutex)) {
 912                         mutex_unlock(&substream->self_group.mutex);
 913                         mutex_lock(&substream->group->mutex);
 914                         mutex_lock(&substream->self_group.mutex);
 915                 }
 916                 res = snd_pcm_action_group(ops, substream, state, 1);
 917                 mutex_unlock(&substream->group->mutex);
 918         } else {
 919                 res = snd_pcm_action_single(ops, substream, state);
 920         }
 921         return res;
 922 }
 923
 924 /*
 925  *  Note: call with stream lock
 926  */
 927 static int snd_pcm_action(struct action_ops *ops,
 928                           struct snd_pcm_substream *substream,
 929                           int state)
 930 {
 931         int res;
 932
 933         if (substream->pcm->nonatomic)
 934                 return snd_pcm_action_mutex(ops, substream, state);
 935
 936         if (snd_pcm_stream_linked(substream)) {
 937                 if (!spin_trylock(&substream->group->lock)) {
 938                         spin_unlock(&substream->self_group.lock);
 939                         spin_lock(&substream->group->lock);
 940                         spin_lock(&substream->self_group.lock);
 941                 }
 942                 res = snd_pcm_action_group(ops, substream, state, 1);
 943                 spin_unlock(&substream->group->lock);
 944         } else {
 945                 res = snd_pcm_action_single(ops, substream, state);
 946         }
 947         return res;
 948 }
 949
 950 /*
 951  *  Note: don't use any locks before
 952  */
 953 static int snd_pcm_action_lock_irq(struct action_ops *ops,
 954                                    struct snd_pcm_substream *substream,
 955                                    int state)
 956 {
 957         int res;
 958
 959         snd_pcm_stream_lock_irq(substream);
 960         res = snd_pcm_action(ops, substream, state);
 961         snd_pcm_stream_unlock_irq(substream);
 962         return res;
 963 }
 964
 965 /*
 966  */
 967 static int snd_pcm_action_nonatomic(struct action_ops *ops,
 968                                     struct snd_pcm_substream *substream,
 969                                     int state)
 970 {
 971         int res;
 972
 973         down_read(&snd_pcm_link_rwsem);
 974         if (snd_pcm_stream_linked(substream))
 975                 res = snd_pcm_action_group(ops, substream, state, 0);
 976         else
 977                 res = snd_pcm_action_single(ops, substream, state);
 978         up_read(&snd_pcm_link_rwsem);
 979         return res;
 980 }
 981
 982 /*
 983  * start callbacks
 984  */
 985 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
 986 {
 987         struct snd_pcm_runtime *runtime = substream->runtime;
 988         if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
 989                 return -EBADFD;
 990         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 991             !snd_pcm_playback_data(substream))
 992                 return -EPIPE;
 993         runtime->trigger_master = substream;
 994         return 0;
 995 }
 996
 997 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
 998 {
 999         if (substream->runtime->trigger_master != substream)
1000                 return 0;
1001         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
1002 }
1003
1004 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
1005 {
1006         if (substream->runtime->trigger_master == substream)
1007                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1008 }
1009
1010 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
1011 {
1012         struct snd_pcm_runtime *runtime = substream->runtime;
1013         snd_pcm_trigger_tstamp(substream);
1014         runtime->hw_ptr_jiffies = jiffies;
1015         runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
1016                                                             runtime->rate;
1017         runtime->status->state = state;
1018         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1019             runtime->silence_size > 0)
1020                 snd_pcm_playback_silence(substream, ULONG_MAX);
1021         if (substream->timer)
1022                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
1023                                  &runtime->trigger_tstamp);
1024 }
1025
1026 static struct action_ops snd_pcm_action_start = {
1027         .pre_action = snd_pcm_pre_start,
1028         .do_action = snd_pcm_do_start,
1029         .undo_action = snd_pcm_undo_start,
1030         .post_action = snd_pcm_post_start
1031 };
1032
1033 /**
1034  * snd_pcm_start - start all linked streams
1035  * @substream: the PCM substream instance
1036  *
1037  * Return: Zero if successful, or a negative error code.
1038  */
1039 int snd_pcm_start(struct snd_pcm_substream *substream)
1040 {
1041         return snd_pcm_action(&snd_pcm_action_start, substream,
1042                               SNDRV_PCM_STATE_RUNNING);
1043 }
1044
1045 /*
1046  * stop callbacks
1047  */
1048 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
1049 {
1050         struct snd_pcm_runtime *runtime = substream->runtime;
1051         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1052                 return -EBADFD;
1053         runtime->trigger_master = substream;
1054         return 0;
1055 }
1056
1057 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
1058 {
1059         if (substream->runtime->trigger_master == substream &&
1060             snd_pcm_running(substream))
1061                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1062         return 0; /* unconditonally stop all substreams */
1063 }
1064
1065 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
1066 {
1067         struct snd_pcm_runtime *runtime = substream->runtime;
1068         if (runtime->status->state != state) {
1069                 snd_pcm_trigger_tstamp(substream);
1070                 if (substream->timer)
1071                         snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
1072                                          &runtime->trigger_tstamp);
1073                 runtime->status->state = state;
1074         }
1075         wake_up(&runtime->sleep);
1076         wake_up(&runtime->tsleep);
1077 }
1078
1079 static struct action_ops snd_pcm_action_stop = {
1080         .pre_action = snd_pcm_pre_stop,
1081         .do_action = snd_pcm_do_stop,
1082         .post_action = snd_pcm_post_stop
1083 };
1084
1085 /**
1086  * snd_pcm_stop - try to stop all running streams in the substream group
1087  * @substream: the PCM substream instance
1088  * @state: PCM state after stopping the stream
1089  *
1090  * The state of each stream is then changed to the given state unconditionally.
1091  *
1092  * Return: Zero if successful, or a negative error code.
1093  */
1094 int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
1095 {
1096         return snd_pcm_action(&snd_pcm_action_stop, substream, state);
1097 }
1098
1099 EXPORT_SYMBOL(snd_pcm_stop);
1100
1101 /**
1102  * snd_pcm_drain_done - stop the DMA only when the given stream is playback
1103  * @substream: the PCM substream
1104  *
1105  * After stopping, the state is changed to SETUP.
1106  * Unlike snd_pcm_stop(), this affects only the given stream.
1107  *
1108  * Return: Zero if succesful, or a negative error code.
1109  */
1110 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
1111 {
1112         return snd_pcm_action_single(&snd_pcm_action_stop, substream,
1113                                      SNDRV_PCM_STATE_SETUP);
1114 }
1115
1116 /*
1117  * pause callbacks
1118  */
1119 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
1120 {
1121         struct snd_pcm_runtime *runtime = substream->runtime;
1122         if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
1123                 return -ENOSYS;
1124         if (push) {
1125                 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
1126                         return -EBADFD;
1127         } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
1128                 return -EBADFD;
1129         runtime->trigger_master = substream;
1130         return 0;
1131 }
1132
1133 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
1134 {
1135         if (substream->runtime->trigger_master != substream)
1136                 return 0;
1137         /* some drivers might use hw_ptr to recover from the pause -
1138            update the hw_ptr now */
1139         if (push)
1140                 snd_pcm_update_hw_ptr(substream);
1141         /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
1142          * a delta between the current jiffies, this gives a large enough
1143          * delta, effectively to skip the check once.
1144          */
1145         substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1146         return substream->ops->trigger(substream,
1147                                        push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
1148                                               SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1149 }
1150
1151 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1152 {
1153         if (substream->runtime->trigger_master == substream)
1154                 substream->ops->trigger(substream,
1155                                         push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1156                                         SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1157 }
1158
1159 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1160 {
1161         struct snd_pcm_runtime *runtime = substream->runtime;
1162         snd_pcm_trigger_tstamp(substream);
1163         if (push) {
1164                 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1165                 if (substream->timer)
1166                         snd_timer_notify(substream->timer,
1167                                          SNDRV_TIMER_EVENT_MPAUSE,
1168                                          &runtime->trigger_tstamp);
1169                 wake_up(&runtime->sleep);
1170                 wake_up(&runtime->tsleep);
1171         } else {
1172                 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1173                 if (substream->timer)
1174                         snd_timer_notify(substream->timer,
1175                                          SNDRV_TIMER_EVENT_MCONTINUE,
1176                                          &runtime->trigger_tstamp);
1177         }
1178 }
1179
1180 static struct action_ops snd_pcm_action_pause = {
1181         .pre_action = snd_pcm_pre_pause,
1182         .do_action = snd_pcm_do_pause,
1183         .undo_action = snd_pcm_undo_pause,
1184         .post_action = snd_pcm_post_pause
1185 };
1186
1187 /*
1188  * Push/release the pause for all linked streams.
1189  */
1190 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1191 {
1192         return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1193 }
1194
1195 #ifdef CONFIG_PM
1196 /* suspend */
1197
1198 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1199 {
1200         struct snd_pcm_runtime *runtime = substream->runtime;
1201         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1202                 return -EBUSY;
1203         runtime->trigger_master = substream;
1204         return 0;
1205 }
1206
1207 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1208 {
1209         struct snd_pcm_runtime *runtime = substream->runtime;
1210         if (runtime->trigger_master != substream)
1211                 return 0;
1212         if (! snd_pcm_running(substream))
1213                 return 0;
1214         substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1215         return 0; /* suspend unconditionally */
1216 }
1217
1218 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1219 {
1220         struct snd_pcm_runtime *runtime = substream->runtime;
1221         snd_pcm_trigger_tstamp(substream);
1222         if (substream->timer)
1223                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1224                                  &runtime->trigger_tstamp);
1225         runtime->status->suspended_state = runtime->status->state;
1226         runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1227         wake_up(&runtime->sleep);
1228         wake_up(&runtime->tsleep);
1229 }
1230
1231 static struct action_ops snd_pcm_action_suspend = {
1232         .pre_action = snd_pcm_pre_suspend,
1233         .do_action = snd_pcm_do_suspend,
1234         .post_action = snd_pcm_post_suspend
1235 };
1236
1237 /**
1238  * snd_pcm_suspend - trigger SUSPEND to all linked streams
1239  * @substream: the PCM substream
1240  *
1241  * After this call, all streams are changed to SUSPENDED state.
1242  *
1243  * Return: Zero if successful (or @substream is %NULL), or a negative error
1244  * code.
1245  */
1246 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1247 {
1248         int err;
1249         unsigned long flags;
1250
1251         if (! substream)
1252                 return 0;
1253
1254         snd_pcm_stream_lock_irqsave(substream, flags);
1255         err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1256         snd_pcm_stream_unlock_irqrestore(substream, flags);
1257         return err;
1258 }
1259
1260 EXPORT_SYMBOL(snd_pcm_suspend);
1261
1262 /**
1263  * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1264  * @pcm: the PCM instance
1265  *
1266  * After this call, all streams are changed to SUSPENDED state.
1267  *
1268  * Return: Zero if successful (or @pcm is %NULL), or a negative error code.
1269  */
1270 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1271 {
1272         struct snd_pcm_substream *substream;
1273         int stream, err = 0;
1274
1275         if (! pcm)
1276                 return 0;
1277
1278         for (stream = 0; stream < 2; stream++) {
1279                 for (substream = pcm->streams[stream].substream;
1280                      substream; substream = substream->next) {
1281                         /* FIXME: the open/close code should lock this as well */
1282                         if (substream->runtime == NULL)
1283                                 continue;
1284                         err = snd_pcm_suspend(substream);
1285                         if (err < 0 && err != -EBUSY)
1286                                 return err;
1287                 }
1288         }
1289         return 0;
1290 }
1291
1292 EXPORT_SYMBOL(snd_pcm_suspend_all);
1293
1294 /* resume */
1295
1296 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1297 {
1298         struct snd_pcm_runtime *runtime = substream->runtime;
1299         if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1300                 return -ENOSYS;
1301         runtime->trigger_master = substream;
1302         return 0;
1303 }
1304
1305 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1306 {
1307         struct snd_pcm_runtime *runtime = substream->runtime;
1308         if (runtime->trigger_master != substream)
1309                 return 0;
1310         /* DMA not running previously? */
1311         if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1312             (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1313              substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1314                 return 0;
1315         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1316 }
1317
1318 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1319 {
1320         if (substream->runtime->trigger_master == substream &&
1321             snd_pcm_running(substream))
1322                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1323 }
1324
1325 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1326 {
1327         struct snd_pcm_runtime *runtime = substream->runtime;
1328         snd_pcm_trigger_tstamp(substream);
1329         if (substream->timer)
1330                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1331                                  &runtime->trigger_tstamp);
1332         runtime->status->state = runtime->status->suspended_state;
1333 }
1334
1335 static struct action_ops snd_pcm_action_resume = {
1336         .pre_action = snd_pcm_pre_resume,
1337         .do_action = snd_pcm_do_resume,
1338         .undo_action = snd_pcm_undo_resume,
1339         .post_action = snd_pcm_post_resume
1340 };
1341
1342 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1343 {
1344         struct snd_card *card = substream->pcm->card;
1345         int res;
1346
1347         snd_power_lock(card);
1348         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1349                 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1350         snd_power_unlock(card);
1351         return res;
1352 }
1353
1354 #else
1355
1356 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1357 {
1358         return -ENOSYS;
1359 }
1360
1361 #endif /* CONFIG_PM */
1362
1363 /*
1364  * xrun ioctl
1365  *
1366  * Change the RUNNING stream(s) to XRUN state.
1367  */
1368 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1369 {
1370         struct snd_card *card = substream->pcm->card;
1371         struct snd_pcm_runtime *runtime = substream->runtime;
1372         int result;
1373
1374         snd_power_lock(card);
1375         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1376                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1377                 if (result < 0)
1378                         goto _unlock;
1379         }
1380
1381         snd_pcm_stream_lock_irq(substream);
1382         switch (runtime->status->state) {
1383         case SNDRV_PCM_STATE_XRUN:
1384                 result = 0;     /* already there */
1385                 break;
1386         case SNDRV_PCM_STATE_RUNNING:
1387                 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1388                 break;
1389         default:
1390                 result = -EBADFD;
1391         }
1392         snd_pcm_stream_unlock_irq(substream);
1393  _unlock:
1394         snd_power_unlock(card);
1395         return result;
1396 }
1397
1398 /*
1399  * reset ioctl
1400  */
1401 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1402 {
1403         struct snd_pcm_runtime *runtime = substream->runtime;
1404         switch (runtime->status->state) {
1405         case SNDRV_PCM_STATE_RUNNING:
1406         case SNDRV_PCM_STATE_PREPARED:
1407         case SNDRV_PCM_STATE_PAUSED:
1408         case SNDRV_PCM_STATE_SUSPENDED:
1409                 return 0;
1410         default:
1411                 return -EBADFD;
1412         }
1413 }
1414
1415 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1416 {
1417         struct snd_pcm_runtime *runtime = substream->runtime;
1418         int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1419         if (err < 0)
1420                 return err;
1421         runtime->hw_ptr_base = 0;
1422         runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1423                 runtime->status->hw_ptr % runtime->period_size;
1424         runtime->silence_start = runtime->status->hw_ptr;
1425         runtime->silence_filled = 0;
1426         return 0;
1427 }
1428
1429 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1430 {
1431         struct snd_pcm_runtime *runtime = substream->runtime;
1432         runtime->control->appl_ptr = runtime->status->hw_ptr;
1433         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1434             runtime->silence_size > 0)
1435                 snd_pcm_playback_silence(substream, ULONG_MAX);
1436 }
1437
1438 static struct action_ops snd_pcm_action_reset = {
1439         .pre_action = snd_pcm_pre_reset,
1440         .do_action = snd_pcm_do_reset,
1441         .post_action = snd_pcm_post_reset
1442 };
1443
1444 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1445 {
1446         return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1447 }
1448
1449 /*
1450  * prepare ioctl
1451  */
1452 /* we use the second argument for updating f_flags */
1453 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1454                                int f_flags)
1455 {
1456         struct snd_pcm_runtime *runtime = substream->runtime;
1457         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1458             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1459                 return -EBADFD;
1460         if (snd_pcm_running(substream))
1461                 return -EBUSY;
1462         substream->f_flags = f_flags;
1463         return 0;
1464 }
1465
1466 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1467 {
1468         int err;
1469         err = substream->ops->prepare(substream);
1470         if (err < 0)
1471                 return err;
1472         return snd_pcm_do_reset(substream, 0);
1473 }
1474
1475 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1476 {
1477         struct snd_pcm_runtime *runtime = substream->runtime;
1478         runtime->control->appl_ptr = runtime->status->hw_ptr;
1479         snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED);
1480 }
1481
1482 static struct action_ops snd_pcm_action_prepare = {
1483         .pre_action = snd_pcm_pre_prepare,
1484         .do_action = snd_pcm_do_prepare,
1485         .post_action = snd_pcm_post_prepare
1486 };
1487
1488 /**
1489  * snd_pcm_prepare - prepare the PCM substream to be triggerable
1490  * @substream: the PCM substream instance
1491  * @file: file to refer f_flags
1492  *
1493  * Return: Zero if successful, or a negative error code.
1494  */
1495 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1496                            struct file *file)
1497 {
1498         int res;
1499         struct snd_card *card = substream->pcm->card;
1500         int f_flags;
1501
1502         if (file)
1503                 f_flags = file->f_flags;
1504         else
1505                 f_flags = substream->f_flags;
1506
1507         snd_power_lock(card);
1508         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1509                 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1510                                                substream, f_flags);
1511         snd_power_unlock(card);
1512         return res;
1513 }
1514
1515 /*
1516  * drain ioctl
1517  */
1518
1519 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1520 {
1521         struct snd_pcm_runtime *runtime = substream->runtime;
1522         switch (runtime->status->state) {
1523         case SNDRV_PCM_STATE_OPEN:
1524         case SNDRV_PCM_STATE_DISCONNECTED:
1525         case SNDRV_PCM_STATE_SUSPENDED:
1526                 return -EBADFD;
1527         }
1528         runtime->trigger_master = substream;
1529         return 0;
1530 }
1531
1532 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1533 {
1534         struct snd_pcm_runtime *runtime = substream->runtime;
1535         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1536                 switch (runtime->status->state) {
1537                 case SNDRV_PCM_STATE_PREPARED:
1538                         /* start playback stream if possible */
1539                         if (! snd_pcm_playback_empty(substream)) {
1540                                 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1541                                 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1542                         }
1543                         break;
1544                 case SNDRV_PCM_STATE_RUNNING:
1545                         runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1546                         break;
1547                 case SNDRV_PCM_STATE_XRUN:
1548                         runtime->status->state = SNDRV_PCM_STATE_SETUP;
1549                         break;
1550                 default:
1551                         break;
1552                 }
1553         } else {
1554                 /* stop running stream */
1555                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1556                         int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1557                                 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1558                         snd_pcm_do_stop(substream, new_state);
1559                         snd_pcm_post_stop(substream, new_state);
1560                 }
1561         }
1562         return 0;
1563 }
1564
1565 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1566 {
1567 }
1568
1569 static struct action_ops snd_pcm_action_drain_init = {
1570         .pre_action = snd_pcm_pre_drain_init,
1571         .do_action = snd_pcm_do_drain_init,
1572         .post_action = snd_pcm_post_drain_init
1573 };
1574
1575 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1576
1577 /*
1578  * Drain the stream(s).
1579  * When the substream is linked, sync until the draining of all playback streams
1580  * is finished.
1581  * After this call, all streams are supposed to be either SETUP or DRAINING
1582  * (capture only) state.
1583  */
1584 static int snd_pcm_drain(struct snd_pcm_substream *substream,
1585                          struct file *file)
1586 {
1587         struct snd_card *card;
1588         struct snd_pcm_runtime *runtime;
1589         struct snd_pcm_substream *s;
1590         wait_queue_t wait;
1591         int result = 0;
1592         int nonblock = 0;
1593
1594         card = substream->pcm->card;
1595         runtime = substream->runtime;
1596
1597         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1598                 return -EBADFD;
1599
1600         snd_power_lock(card);
1601         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1602                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1603                 if (result < 0) {
1604                         snd_power_unlock(card);
1605                         return result;
1606                 }
1607         }
1608
1609         if (file) {
1610                 if (file->f_flags & O_NONBLOCK)
1611                         nonblock = 1;
1612         } else if (substream->f_flags & O_NONBLOCK)
1613                 nonblock = 1;
1614
1615         down_read(&snd_pcm_link_rwsem);
1616         snd_pcm_stream_lock_irq(substream);
1617         /* resume pause */
1618         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1619                 snd_pcm_pause(substream, 0);
1620
1621         /* pre-start/stop - all running streams are changed to DRAINING state */
1622         result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1623         if (result < 0)
1624                 goto unlock;
1625         /* in non-blocking, we don't wait in ioctl but let caller poll */
1626         if (nonblock) {
1627                 result = -EAGAIN;
1628                 goto unlock;
1629         }
1630
1631         for (;;) {
1632                 long tout;
1633                 struct snd_pcm_runtime *to_check;
1634                 if (signal_pending(current)) {
1635                         result = -ERESTARTSYS;
1636                         break;
1637                 }
1638                 /* find a substream to drain */
1639                 to_check = NULL;
1640                 snd_pcm_group_for_each_entry(s, substream) {
1641                         if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1642                                 continue;
1643                         runtime = s->runtime;
1644                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1645                                 to_check = runtime;
1646                                 break;
1647                         }
1648                 }
1649                 if (!to_check)
1650                         break; /* all drained */
1651                 init_waitqueue_entry(&wait, current);
1652                 add_wait_queue(&to_check->sleep, &wait);
1653                 snd_pcm_stream_unlock_irq(substream);
1654                 up_read(&snd_pcm_link_rwsem);
1655                 snd_power_unlock(card);
1656                 if (runtime->no_period_wakeup)
1657                         tout = MAX_SCHEDULE_TIMEOUT;
1658                 else {
1659                         tout = 10;
1660                         if (runtime->rate) {
1661                                 long t = runtime->period_size * 2 / runtime->rate;
1662                                 tout = max(t, tout);
1663                         }
1664                         tout = msecs_to_jiffies(tout * 1000);
1665                 }
1666                 tout = schedule_timeout_interruptible(tout);
1667                 snd_power_lock(card);
1668                 down_read(&snd_pcm_link_rwsem);
1669                 snd_pcm_stream_lock_irq(substream);
1670                 remove_wait_queue(&to_check->sleep, &wait);
1671                 if (card->shutdown) {
1672                         result = -ENODEV;
1673                         break;
1674                 }
1675                 if (tout == 0) {
1676                         if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1677                                 result = -ESTRPIPE;
1678                         else {
1679                                 dev_dbg(substream->pcm->card->dev,
1680                                         "playback drain error (DMA or IRQ trouble?)\n");
1681                                 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1682                                 result = -EIO;
1683                         }
1684                         break;
1685                 }
1686         }
1687
1688  unlock:
1689         snd_pcm_stream_unlock_irq(substream);
1690         up_read(&snd_pcm_link_rwsem);
1691         snd_power_unlock(card);
1692
1693         return result;
1694 }
1695
1696 /*
1697  * drop ioctl
1698  *
1699  * Immediately put all linked substreams into SETUP state.
1700  */
1701 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1702 {
1703         struct snd_pcm_runtime *runtime;
1704         int result = 0;
1705
1706         if (PCM_RUNTIME_CHECK(substream))
1707                 return -ENXIO;
1708         runtime = substream->runtime;
1709
1710         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1711             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1712             runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1713                 return -EBADFD;
1714
1715         snd_pcm_stream_lock_irq(substream);
1716         /* resume pause */
1717         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1718                 snd_pcm_pause(substream, 0);
1719
1720         snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1721         /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1722         snd_pcm_stream_unlock_irq(substream);
1723
1724         return result;
1725 }
1726
1727
1728 static bool is_pcm_file(struct file *file)
1729 {
1730         struct inode *inode = file_inode(file);
1731         unsigned int minor;
1732
1733         if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major)
1734                 return false;
1735         minor = iminor(inode);
1736         return snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) ||
1737                 snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE);
1738 }
1739
1740 /*
1741  * PCM link handling
1742  */
1743 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1744 {
1745         int res = 0;
1746         struct snd_pcm_file *pcm_file;
1747         struct snd_pcm_substream *substream1;
1748         struct snd_pcm_group *group;
1749         struct fd f = fdget(fd);
1750
1751         if (!f.file)
1752                 return -EBADFD;
1753         if (!is_pcm_file(f.file)) {
1754                 res = -EBADFD;
1755                 goto _badf;
1756         }
1757         pcm_file = f.file->private_data;
1758         substream1 = pcm_file->substream;
1759         group = kmalloc(sizeof(*group), GFP_KERNEL);
1760         if (!group) {
1761                 res = -ENOMEM;
1762                 goto _nolock;
1763         }
1764         down_write(&snd_pcm_link_rwsem);
1765         write_lock_irq(&snd_pcm_link_rwlock);
1766         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1767             substream->runtime->status->state != substream1->runtime->status->state ||
1768             substream->pcm->nonatomic != substream1->pcm->nonatomic) {
1769                 res = -EBADFD;
1770                 goto _end;
1771         }
1772         if (snd_pcm_stream_linked(substream1)) {
1773                 res = -EALREADY;
1774                 goto _end;
1775         }
1776         if (!snd_pcm_stream_linked(substream)) {
1777                 substream->group = group;
1778                 group = NULL;
1779                 spin_lock_init(&substream->group->lock);
1780                 mutex_init(&substream->group->mutex);
1781                 INIT_LIST_HEAD(&substream->group->substreams);
1782                 list_add_tail(&substream->link_list, &substream->group->substreams);
1783                 substream->group->count = 1;
1784         }
1785         list_add_tail(&substream1->link_list, &substream->group->substreams);
1786         substream->group->count++;
1787         substream1->group = substream->group;
1788  _end:
1789         write_unlock_irq(&snd_pcm_link_rwlock);
1790         up_write(&snd_pcm_link_rwsem);
1791  _nolock:
1792         snd_card_unref(substream1->pcm->card);
1793         kfree(group);
1794  _badf:
1795         fdput(f);
1796         return res;
1797 }
1798
1799 static void relink_to_local(struct snd_pcm_substream *substream)
1800 {
1801         substream->group = &substream->self_group;
1802         INIT_LIST_HEAD(&substream->self_group.substreams);
1803         list_add_tail(&substream->link_list, &substream->self_group.substreams);
1804 }
1805
1806 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1807 {
1808         struct snd_pcm_substream *s;
1809         int res = 0;
1810
1811         down_write(&snd_pcm_link_rwsem);
1812         write_lock_irq(&snd_pcm_link_rwlock);
1813         if (!snd_pcm_stream_linked(substream)) {
1814                 res = -EALREADY;
1815                 goto _end;
1816         }
1817         list_del(&substream->link_list);
1818         substream->group->count--;
1819         if (substream->group->count == 1) {     /* detach the last stream, too */
1820                 snd_pcm_group_for_each_entry(s, substream) {
1821                         relink_to_local(s);
1822                         break;
1823                 }
1824                 kfree(substream->group);
1825         }
1826         relink_to_local(substream);
1827        _end:
1828         write_unlock_irq(&snd_pcm_link_rwlock);
1829         up_write(&snd_pcm_link_rwsem);
1830         return res;
1831 }
1832
1833 /*
1834  * hw configurator
1835  */
1836 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1837                                struct snd_pcm_hw_rule *rule)
1838 {
1839         struct snd_interval t;
1840         snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1841                      hw_param_interval_c(params, rule->deps[1]), &t);
1842         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1843 }
1844
1845 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1846                                struct snd_pcm_hw_rule *rule)
1847 {
1848         struct snd_interval t;
1849         snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1850                      hw_param_interval_c(params, rule->deps[1]), &t);
1851         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1852 }
1853
1854 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1855                                    struct snd_pcm_hw_rule *rule)
1856 {
1857         struct snd_interval t;
1858         snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1859                          hw_param_interval_c(params, rule->deps[1]),
1860                          (unsigned long) rule->private, &t);
1861         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1862 }
1863
1864 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1865                                    struct snd_pcm_hw_rule *rule)
1866 {
1867         struct snd_interval t;
1868         snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1869                          (unsigned long) rule->private,
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_format(struct snd_pcm_hw_params *params,
1875                                   struct snd_pcm_hw_rule *rule)
1876 {
1877         unsigned int k;
1878         struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1879         struct snd_mask m;
1880         struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1881         snd_mask_any(&m);
1882         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1883                 int bits;
1884                 if (! snd_mask_test(mask, k))
1885                         continue;
1886                 bits = snd_pcm_format_physical_width(k);
1887                 if (bits <= 0)
1888                         continue; /* ignore invalid formats */
1889                 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1890                         snd_mask_reset(&m, k);
1891         }
1892         return snd_mask_refine(mask, &m);
1893 }
1894
1895 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1896                                        struct snd_pcm_hw_rule *rule)
1897 {
1898         struct snd_interval t;
1899         unsigned int k;
1900         t.min = UINT_MAX;
1901         t.max = 0;
1902         t.openmin = 0;
1903         t.openmax = 0;
1904         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1905                 int bits;
1906                 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1907                         continue;
1908                 bits = snd_pcm_format_physical_width(k);
1909                 if (bits <= 0)
1910                         continue; /* ignore invalid formats */
1911                 if (t.min > (unsigned)bits)
1912                         t.min = bits;
1913                 if (t.max < (unsigned)bits)
1914                         t.max = bits;
1915         }
1916         t.integer = 1;
1917         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1918 }
1919
1920 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1921 #error "Change this table"
1922 #endif
1923
1924 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1925                                  48000, 64000, 88200, 96000, 176400, 192000 };
1926
1927 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1928         .count = ARRAY_SIZE(rates),
1929         .list = rates,
1930 };
1931
1932 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1933                                 struct snd_pcm_hw_rule *rule)
1934 {
1935         struct snd_pcm_hardware *hw = rule->private;
1936         return snd_interval_list(hw_param_interval(params, rule->var),
1937                                  snd_pcm_known_rates.count,
1938                                  snd_pcm_known_rates.list, hw->rates);
1939 }
1940
1941 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1942                                             struct snd_pcm_hw_rule *rule)
1943 {
1944         struct snd_interval t;
1945         struct snd_pcm_substream *substream = rule->private;
1946         t.min = 0;
1947         t.max = substream->buffer_bytes_max;
1948         t.openmin = 0;
1949         t.openmax = 0;
1950         t.integer = 1;
1951         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1952 }
1953
1954 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1955 {
1956         struct snd_pcm_runtime *runtime = substream->runtime;
1957         struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1958         int k, err;
1959
1960         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1961                 snd_mask_any(constrs_mask(constrs, k));
1962         }
1963
1964         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1965                 snd_interval_any(constrs_interval(constrs, k));
1966         }
1967
1968         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1969         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1970         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1971         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1972         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1973
1974         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1975                                    snd_pcm_hw_rule_format, NULL,
1976                                    SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1977         if (err < 0)
1978                 return err;
1979         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1980                                   snd_pcm_hw_rule_sample_bits, NULL,
1981                                   SNDRV_PCM_HW_PARAM_FORMAT,
1982                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1983         if (err < 0)
1984                 return err;
1985         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1986                                   snd_pcm_hw_rule_div, NULL,
1987                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1988         if (err < 0)
1989                 return err;
1990         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1991                                   snd_pcm_hw_rule_mul, NULL,
1992                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1993         if (err < 0)
1994                 return err;
1995         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1996                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1997                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1998         if (err < 0)
1999                 return err;
2000         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2001                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
2002                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
2003         if (err < 0)
2004                 return err;
2005         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
2006                                   snd_pcm_hw_rule_div, NULL,
2007                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2008         if (err < 0)
2009                 return err;
2010         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2011                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2012                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
2013         if (err < 0)
2014                 return err;
2015         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2016                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2017                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
2018         if (err < 0)
2019                 return err;
2020         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
2021                                   snd_pcm_hw_rule_div, NULL,
2022                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2023         if (err < 0)
2024                 return err;
2025         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2026                                   snd_pcm_hw_rule_div, NULL,
2027                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2028         if (err < 0)
2029                 return err;
2030         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2031                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
2032                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2033         if (err < 0)
2034                 return err;
2035         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2036                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
2037                                   SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2038         if (err < 0)
2039                 return err;
2040         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2041                                   snd_pcm_hw_rule_mul, NULL,
2042                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2043         if (err < 0)
2044                 return err;
2045         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2046                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
2047                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2048         if (err < 0)
2049                 return err;
2050         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2051                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
2052                                   SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2053         if (err < 0)
2054                 return err;
2055         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2056                                   snd_pcm_hw_rule_muldivk, (void*) 8,
2057                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2058         if (err < 0)
2059                 return err;
2060         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2061                                   snd_pcm_hw_rule_muldivk, (void*) 8,
2062                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2063         if (err < 0)
2064                 return err;
2065         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
2066                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2067                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2068         if (err < 0)
2069                 return err;
2070         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
2071                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2072                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2073         if (err < 0)
2074                 return err;
2075         return 0;
2076 }
2077
2078 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
2079 {
2080         struct snd_pcm_runtime *runtime = substream->runtime;
2081         struct snd_pcm_hardware *hw = &runtime->hw;
2082         int err;
2083         unsigned int mask = 0;
2084
2085         if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2086                 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
2087         if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2088                 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
2089         if (hw_support_mmap(substream)) {
2090                 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2091                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2092                 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2093                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
2094                 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
2095                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
2096         }
2097         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
2098         if (err < 0)
2099                 return err;
2100
2101         err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
2102         if (err < 0)
2103                 return err;
2104
2105         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
2106         if (err < 0)
2107                 return err;
2108
2109         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
2110                                            hw->channels_min, hw->channels_max);
2111         if (err < 0)
2112                 return err;
2113
2114         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
2115                                            hw->rate_min, hw->rate_max);
2116         if (err < 0)
2117                 return err;
2118
2119         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2120                                            hw->period_bytes_min, hw->period_bytes_max);
2121         if (err < 0)
2122                 return err;
2123
2124         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
2125                                            hw->periods_min, hw->periods_max);
2126         if (err < 0)
2127                 return err;
2128
2129         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2130                                            hw->period_bytes_min, hw->buffer_bytes_max);
2131         if (err < 0)
2132                 return err;
2133
2134         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2135                                   snd_pcm_hw_rule_buffer_bytes_max, substream,
2136                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
2137         if (err < 0)
2138                 return err;
2139
2140         /* FIXME: remove */
2141         if (runtime->dma_bytes) {
2142                 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
2143                 if (err < 0)
2144                         return err;
2145         }
2146
2147         if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
2148                 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2149                                           snd_pcm_hw_rule_rate, hw,
2150                                           SNDRV_PCM_HW_PARAM_RATE, -1);
2151                 if (err < 0)
2152                         return err;
2153         }
2154
2155         /* FIXME: this belong to lowlevel */
2156         snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2157
2158         return 0;
2159 }
2160
2161 static void pcm_release_private(struct snd_pcm_substream *substream)
2162 {
2163         snd_pcm_unlink(substream);
2164 }
2165
2166 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2167 {
2168         substream->ref_count--;
2169         if (substream->ref_count > 0)
2170                 return;
2171
2172         snd_pcm_drop(substream);
2173         if (substream->hw_opened) {
2174                 if (substream->ops->hw_free != NULL)
2175                         substream->ops->hw_free(substream);
2176                 substream->ops->close(substream);
2177                 substream->hw_opened = 0;
2178         }
2179         if (pm_qos_request_active(&substream->latency_pm_qos_req))
2180                 pm_qos_remove_request(&substream->latency_pm_qos_req);
2181         if (substream->pcm_release) {
2182                 substream->pcm_release(substream);
2183                 substream->pcm_release = NULL;
2184         }
2185         snd_pcm_detach_substream(substream);
2186 }
2187
2188 EXPORT_SYMBOL(snd_pcm_release_substream);
2189
2190 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2191                            struct file *file,
2192                            struct snd_pcm_substream **rsubstream)
2193 {
2194         struct snd_pcm_substream *substream;
2195         int err;
2196
2197         err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2198         if (err < 0)
2199                 return err;
2200         if (substream->ref_count > 1) {
2201                 *rsubstream = substream;
2202                 return 0;
2203         }
2204
2205         err = snd_pcm_hw_constraints_init(substream);
2206         if (err < 0) {
2207                 pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n");
2208                 goto error;
2209         }
2210
2211         if ((err = substream->ops->open(substream)) < 0)
2212                 goto error;
2213
2214         substream->hw_opened = 1;
2215
2216         err = snd_pcm_hw_constraints_complete(substream);
2217         if (err < 0) {
2218                 pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n");
2219                 goto error;
2220         }
2221
2222         *rsubstream = substream;
2223         return 0;
2224
2225  error:
2226         snd_pcm_release_substream(substream);
2227         return err;
2228 }
2229
2230 EXPORT_SYMBOL(snd_pcm_open_substream);
2231
2232 static int snd_pcm_open_file(struct file *file,
2233                              struct snd_pcm *pcm,
2234                              int stream)
2235 {
2236         struct snd_pcm_file *pcm_file;
2237         struct snd_pcm_substream *substream;
2238         int err;
2239
2240         err = snd_pcm_open_substream(pcm, stream, file, &substream);
2241         if (err < 0)
2242                 return err;
2243
2244         pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2245         if (pcm_file == NULL) {
2246                 snd_pcm_release_substream(substream);
2247                 return -ENOMEM;
2248         }
2249         pcm_file->substream = substream;
2250         if (substream->ref_count == 1) {
2251                 substream->file = pcm_file;
2252                 substream->pcm_release = pcm_release_private;
2253         }
2254         file->private_data = pcm_file;
2255
2256         return 0;
2257 }
2258
2259 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2260 {
2261         struct snd_pcm *pcm;
2262         int err = nonseekable_open(inode, file);
2263         if (err < 0)
2264                 return err;
2265         pcm = snd_lookup_minor_data(iminor(inode),
2266                                     SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2267         err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2268         if (pcm)
2269                 snd_card_unref(pcm->card);
2270         return err;
2271 }
2272
2273 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2274 {
2275         struct snd_pcm *pcm;
2276         int err = nonseekable_open(inode, file);
2277         if (err < 0)
2278                 return err;
2279         pcm = snd_lookup_minor_data(iminor(inode),
2280                                     SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2281         err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2282         if (pcm)
2283                 snd_card_unref(pcm->card);
2284         return err;
2285 }
2286
2287 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2288 {
2289         int err;
2290         wait_queue_t wait;
2291
2292         if (pcm == NULL) {
2293                 err = -ENODEV;
2294                 goto __error1;
2295         }
2296         err = snd_card_file_add(pcm->card, file);
2297         if (err < 0)
2298                 goto __error1;
2299         if (!try_module_get(pcm->card->module)) {
2300                 err = -EFAULT;
2301                 goto __error2;
2302         }
2303         init_waitqueue_entry(&wait, current);
2304         add_wait_queue(&pcm->open_wait, &wait);
2305         mutex_lock(&pcm->open_mutex);
2306         while (1) {
2307                 err = snd_pcm_open_file(file, pcm, stream);
2308                 if (err >= 0)
2309                         break;
2310                 if (err == -EAGAIN) {
2311                         if (file->f_flags & O_NONBLOCK) {
2312                                 err = -EBUSY;
2313                                 break;
2314                         }
2315                 } else
2316                         break;
2317                 set_current_state(TASK_INTERRUPTIBLE);
2318                 mutex_unlock(&pcm->open_mutex);
2319                 schedule();
2320                 mutex_lock(&pcm->open_mutex);
2321                 if (pcm->card->shutdown) {
2322                         err = -ENODEV;
2323                         break;
2324                 }
2325                 if (signal_pending(current)) {
2326                         err = -ERESTARTSYS;
2327                         break;
2328                 }
2329         }
2330         remove_wait_queue(&pcm->open_wait, &wait);
2331         mutex_unlock(&pcm->open_mutex);
2332         if (err < 0)
2333                 goto __error;
2334         return err;
2335
2336       __error:
2337         module_put(pcm->card->module);
2338       __error2:
2339         snd_card_file_remove(pcm->card, file);
2340       __error1:
2341         return err;
2342 }
2343
2344 static int snd_pcm_release(struct inode *inode, struct file *file)
2345 {
2346         struct snd_pcm *pcm;
2347         struct snd_pcm_substream *substream;
2348         struct snd_pcm_file *pcm_file;
2349
2350         pcm_file = file->private_data;
2351         substream = pcm_file->substream;
2352         if (snd_BUG_ON(!substream))
2353                 return -ENXIO;
2354         pcm = substream->pcm;
2355         mutex_lock(&pcm->open_mutex);
2356         snd_pcm_release_substream(substream);
2357         kfree(pcm_file);
2358         mutex_unlock(&pcm->open_mutex);
2359         wake_up(&pcm->open_wait);
2360         module_put(pcm->card->module);
2361         snd_card_file_remove(pcm->card, file);
2362         return 0;
2363 }
2364
2365 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2366                                                  snd_pcm_uframes_t frames)
2367 {
2368         struct snd_pcm_runtime *runtime = substream->runtime;
2369         snd_pcm_sframes_t appl_ptr;
2370         snd_pcm_sframes_t ret;
2371         snd_pcm_sframes_t hw_avail;
2372
2373         if (frames == 0)
2374                 return 0;
2375
2376         snd_pcm_stream_lock_irq(substream);
2377         switch (runtime->status->state) {
2378         case SNDRV_PCM_STATE_PREPARED:
2379                 break;
2380         case SNDRV_PCM_STATE_DRAINING:
2381         case SNDRV_PCM_STATE_RUNNING:
2382                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2383                         break;
2384                 /* Fall through */
2385         case SNDRV_PCM_STATE_XRUN:
2386                 ret = -EPIPE;
2387                 goto __end;
2388         case SNDRV_PCM_STATE_SUSPENDED:
2389                 ret = -ESTRPIPE;
2390                 goto __end;
2391         default:
2392                 ret = -EBADFD;
2393                 goto __end;
2394         }
2395
2396         hw_avail = snd_pcm_playback_hw_avail(runtime);
2397         if (hw_avail <= 0) {
2398                 ret = 0;
2399                 goto __end;
2400         }
2401         if (frames > (snd_pcm_uframes_t)hw_avail)
2402                 frames = hw_avail;
2403         appl_ptr = runtime->control->appl_ptr - frames;
2404         if (appl_ptr < 0)
2405                 appl_ptr += runtime->boundary;
2406         runtime->control->appl_ptr = appl_ptr;
2407         ret = frames;
2408  __end:
2409         snd_pcm_stream_unlock_irq(substream);
2410         return ret;
2411 }
2412
2413 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2414                                                 snd_pcm_uframes_t frames)
2415 {
2416         struct snd_pcm_runtime *runtime = substream->runtime;
2417         snd_pcm_sframes_t appl_ptr;
2418         snd_pcm_sframes_t ret;
2419         snd_pcm_sframes_t hw_avail;
2420
2421         if (frames == 0)
2422                 return 0;
2423
2424         snd_pcm_stream_lock_irq(substream);
2425         switch (runtime->status->state) {
2426         case SNDRV_PCM_STATE_PREPARED:
2427         case SNDRV_PCM_STATE_DRAINING:
2428                 break;
2429         case SNDRV_PCM_STATE_RUNNING:
2430                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2431                         break;
2432                 /* Fall through */
2433         case SNDRV_PCM_STATE_XRUN:
2434                 ret = -EPIPE;
2435                 goto __end;
2436         case SNDRV_PCM_STATE_SUSPENDED:
2437                 ret = -ESTRPIPE;
2438                 goto __end;
2439         default:
2440                 ret = -EBADFD;
2441                 goto __end;
2442         }
2443
2444         hw_avail = snd_pcm_capture_hw_avail(runtime);
2445         if (hw_avail <= 0) {
2446                 ret = 0;
2447                 goto __end;
2448         }
2449         if (frames > (snd_pcm_uframes_t)hw_avail)
2450                 frames = hw_avail;
2451         appl_ptr = runtime->control->appl_ptr - frames;
2452         if (appl_ptr < 0)
2453                 appl_ptr += runtime->boundary;
2454         runtime->control->appl_ptr = appl_ptr;
2455         ret = frames;
2456  __end:
2457         snd_pcm_stream_unlock_irq(substream);
2458         return ret;
2459 }
2460
2461 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2462                                                   snd_pcm_uframes_t frames)
2463 {
2464         struct snd_pcm_runtime *runtime = substream->runtime;
2465         snd_pcm_sframes_t appl_ptr;
2466         snd_pcm_sframes_t ret;
2467         snd_pcm_sframes_t avail;
2468
2469         if (frames == 0)
2470                 return 0;
2471
2472         snd_pcm_stream_lock_irq(substream);
2473         switch (runtime->status->state) {
2474         case SNDRV_PCM_STATE_PREPARED:
2475         case SNDRV_PCM_STATE_PAUSED:
2476                 break;
2477         case SNDRV_PCM_STATE_DRAINING:
2478         case SNDRV_PCM_STATE_RUNNING:
2479                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2480                         break;
2481                 /* Fall through */
2482         case SNDRV_PCM_STATE_XRUN:
2483                 ret = -EPIPE;
2484                 goto __end;
2485         case SNDRV_PCM_STATE_SUSPENDED:
2486                 ret = -ESTRPIPE;
2487                 goto __end;
2488         default:
2489                 ret = -EBADFD;
2490                 goto __end;
2491         }
2492
2493         avail = snd_pcm_playback_avail(runtime);
2494         if (avail <= 0) {
2495                 ret = 0;
2496                 goto __end;
2497         }
2498         if (frames > (snd_pcm_uframes_t)avail)
2499                 frames = avail;
2500         appl_ptr = runtime->control->appl_ptr + frames;
2501         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2502                 appl_ptr -= runtime->boundary;
2503         runtime->control->appl_ptr = appl_ptr;
2504         ret = frames;
2505  __end:
2506         snd_pcm_stream_unlock_irq(substream);
2507         return ret;
2508 }
2509
2510 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2511                                                  snd_pcm_uframes_t frames)
2512 {
2513         struct snd_pcm_runtime *runtime = substream->runtime;
2514         snd_pcm_sframes_t appl_ptr;
2515         snd_pcm_sframes_t ret;
2516         snd_pcm_sframes_t avail;
2517
2518         if (frames == 0)
2519                 return 0;
2520
2521         snd_pcm_stream_lock_irq(substream);
2522         switch (runtime->status->state) {
2523         case SNDRV_PCM_STATE_PREPARED:
2524         case SNDRV_PCM_STATE_DRAINING:
2525         case SNDRV_PCM_STATE_PAUSED:
2526                 break;
2527         case SNDRV_PCM_STATE_RUNNING:
2528                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2529                         break;
2530                 /* Fall through */
2531         case SNDRV_PCM_STATE_XRUN:
2532                 ret = -EPIPE;
2533                 goto __end;
2534         case SNDRV_PCM_STATE_SUSPENDED:
2535                 ret = -ESTRPIPE;
2536                 goto __end;
2537         default:
2538                 ret = -EBADFD;
2539                 goto __end;
2540         }
2541
2542         avail = snd_pcm_capture_avail(runtime);
2543         if (avail <= 0) {
2544                 ret = 0;
2545                 goto __end;
2546         }
2547         if (frames > (snd_pcm_uframes_t)avail)
2548                 frames = avail;
2549         appl_ptr = runtime->control->appl_ptr + frames;
2550         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2551                 appl_ptr -= runtime->boundary;
2552         runtime->control->appl_ptr = appl_ptr;
2553         ret = frames;
2554  __end:
2555         snd_pcm_stream_unlock_irq(substream);
2556         return ret;
2557 }
2558
2559 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2560 {
2561         struct snd_pcm_runtime *runtime = substream->runtime;
2562         int err;
2563
2564         snd_pcm_stream_lock_irq(substream);
2565         switch (runtime->status->state) {
2566         case SNDRV_PCM_STATE_DRAINING:
2567                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2568                         goto __badfd;
2569                 /* Fall through */
2570         case SNDRV_PCM_STATE_RUNNING:
2571                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2572                         break;
2573                 /* Fall through */
2574         case SNDRV_PCM_STATE_PREPARED:
2575         case SNDRV_PCM_STATE_SUSPENDED:
2576                 err = 0;
2577                 break;
2578         case SNDRV_PCM_STATE_XRUN:
2579                 err = -EPIPE;
2580                 break;
2581         default:
2582               __badfd:
2583                 err = -EBADFD;
2584                 break;
2585         }
2586         snd_pcm_stream_unlock_irq(substream);
2587         return err;
2588 }
2589
2590 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2591                          snd_pcm_sframes_t __user *res)
2592 {
2593         struct snd_pcm_runtime *runtime = substream->runtime;
2594         int err;
2595         snd_pcm_sframes_t n = 0;
2596
2597         snd_pcm_stream_lock_irq(substream);
2598         switch (runtime->status->state) {
2599         case SNDRV_PCM_STATE_DRAINING:
2600                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2601                         goto __badfd;
2602                 /* Fall through */
2603         case SNDRV_PCM_STATE_RUNNING:
2604                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2605                         break;
2606                 /* Fall through */
2607         case SNDRV_PCM_STATE_PREPARED:
2608         case SNDRV_PCM_STATE_SUSPENDED:
2609                 err = 0;
2610                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2611                         n = snd_pcm_playback_hw_avail(runtime);
2612                 else
2613                         n = snd_pcm_capture_avail(runtime);
2614                 n += runtime->delay;
2615                 break;
2616         case SNDRV_PCM_STATE_XRUN:
2617                 err = -EPIPE;
2618                 break;
2619         default:
2620               __badfd:
2621                 err = -EBADFD;
2622                 break;
2623         }
2624         snd_pcm_stream_unlock_irq(substream);
2625         if (!err)
2626                 if (put_user(n, res))
2627                         err = -EFAULT;
2628         return err;
2629 }
2630
2631 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2632                             struct snd_pcm_sync_ptr __user *_sync_ptr)
2633 {
2634         struct snd_pcm_runtime *runtime = substream->runtime;
2635         struct snd_pcm_sync_ptr sync_ptr;
2636         volatile struct snd_pcm_mmap_status *status;
2637         volatile struct snd_pcm_mmap_control *control;
2638         int err;
2639
2640         memset(&sync_ptr, 0, sizeof(sync_ptr));
2641         if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2642                 return -EFAULT;
2643         if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2644                 return -EFAULT;
2645         status = runtime->status;
2646         control = runtime->control;
2647         if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2648                 err = snd_pcm_hwsync(substream);
2649                 if (err < 0)
2650                         return err;
2651         }
2652         snd_pcm_stream_lock_irq(substream);
2653         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2654                 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2655         else
2656                 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2657         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2658                 control->avail_min = sync_ptr.c.control.avail_min;
2659         else
2660                 sync_ptr.c.control.avail_min = control->avail_min;
2661         sync_ptr.s.status.state = status->state;
2662         sync_ptr.s.status.hw_ptr = status->hw_ptr;
2663         sync_ptr.s.status.tstamp = status->tstamp;
2664         sync_ptr.s.status.suspended_state = status->suspended_state;
2665         snd_pcm_stream_unlock_irq(substream);
2666         if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2667                 return -EFAULT;
2668         return 0;
2669 }
2670
2671 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2672 {
2673         struct snd_pcm_runtime *runtime = substream->runtime;
2674         int arg;
2675
2676         if (get_user(arg, _arg))
2677                 return -EFAULT;
2678         if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2679                 return -EINVAL;
2680         runtime->tstamp_type = arg;
2681         return 0;
2682 }
2683
2684 static int snd_pcm_common_ioctl1(struct file *file,
2685                                  struct snd_pcm_substream *substream,
2686                                  unsigned int cmd, void __user *arg)
2687 {
2688         switch (cmd) {
2689         case SNDRV_PCM_IOCTL_PVERSION:
2690                 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2691         case SNDRV_PCM_IOCTL_INFO:
2692                 return snd_pcm_info_user(substream, arg);
2693         case SNDRV_PCM_IOCTL_TSTAMP:    /* just for compatibility */
2694                 return 0;
2695         case SNDRV_PCM_IOCTL_TTSTAMP:
2696                 return snd_pcm_tstamp(substream, arg);
2697         case SNDRV_PCM_IOCTL_HW_REFINE:
2698                 return snd_pcm_hw_refine_user(substream, arg);
2699         case SNDRV_PCM_IOCTL_HW_PARAMS:
2700                 return snd_pcm_hw_params_user(substream, arg);
2701         case SNDRV_PCM_IOCTL_HW_FREE:
2702                 return snd_pcm_hw_free(substream);
2703         case SNDRV_PCM_IOCTL_SW_PARAMS:
2704                 return snd_pcm_sw_params_user(substream, arg);
2705         case SNDRV_PCM_IOCTL_STATUS:
2706                 return snd_pcm_status_user(substream, arg);
2707         case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2708                 return snd_pcm_channel_info_user(substream, arg);
2709         case SNDRV_PCM_IOCTL_PREPARE:
2710                 return snd_pcm_prepare(substream, file);
2711         case SNDRV_PCM_IOCTL_RESET:
2712                 return snd_pcm_reset(substream);
2713         case SNDRV_PCM_IOCTL_START:
2714                 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2715         case SNDRV_PCM_IOCTL_LINK:
2716                 return snd_pcm_link(substream, (int)(unsigned long) arg);
2717         case SNDRV_PCM_IOCTL_UNLINK:
2718                 return snd_pcm_unlink(substream);
2719         case SNDRV_PCM_IOCTL_RESUME:
2720                 return snd_pcm_resume(substream);
2721         case SNDRV_PCM_IOCTL_XRUN:
2722                 return snd_pcm_xrun(substream);
2723         case SNDRV_PCM_IOCTL_HWSYNC:
2724                 return snd_pcm_hwsync(substream);
2725         case SNDRV_PCM_IOCTL_DELAY:
2726                 return snd_pcm_delay(substream, arg);
2727         case SNDRV_PCM_IOCTL_SYNC_PTR:
2728                 return snd_pcm_sync_ptr(substream, arg);
2729 #ifdef CONFIG_SND_SUPPORT_OLD_API
2730         case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2731                 return snd_pcm_hw_refine_old_user(substream, arg);
2732         case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2733                 return snd_pcm_hw_params_old_user(substream, arg);
2734 #endif
2735         case SNDRV_PCM_IOCTL_DRAIN:
2736                 return snd_pcm_drain(substream, file);
2737         case SNDRV_PCM_IOCTL_DROP:
2738                 return snd_pcm_drop(substream);
2739         case SNDRV_PCM_IOCTL_PAUSE:
2740         {
2741                 int res;
2742                 snd_pcm_stream_lock_irq(substream);
2743                 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2744                 snd_pcm_stream_unlock_irq(substream);
2745                 return res;
2746         }
2747         }
2748         pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd);
2749         return -ENOTTY;
2750 }
2751
2752 static int snd_pcm_playback_ioctl1(struct file *file,
2753                                    struct snd_pcm_substream *substream,
2754                                    unsigned int cmd, void __user *arg)
2755 {
2756         if (snd_BUG_ON(!substream))
2757                 return -ENXIO;
2758         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2759                 return -EINVAL;
2760         switch (cmd) {
2761         case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2762         {
2763                 struct snd_xferi xferi;
2764                 struct snd_xferi __user *_xferi = arg;
2765                 struct snd_pcm_runtime *runtime = substream->runtime;
2766                 snd_pcm_sframes_t result;
2767                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2768                         return -EBADFD;
2769                 if (put_user(0, &_xferi->result))
2770                         return -EFAULT;
2771                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2772                         return -EFAULT;
2773                 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2774                 __put_user(result, &_xferi->result);
2775                 return result < 0 ? result : 0;
2776         }
2777         case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2778         {
2779                 struct snd_xfern xfern;
2780                 struct snd_xfern __user *_xfern = arg;
2781                 struct snd_pcm_runtime *runtime = substream->runtime;
2782                 void __user **bufs;
2783                 snd_pcm_sframes_t result;
2784                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2785                         return -EBADFD;
2786                 if (runtime->channels > 128)
2787                         return -EINVAL;
2788                 if (put_user(0, &_xfern->result))
2789                         return -EFAULT;
2790                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2791                         return -EFAULT;
2792
2793                 bufs = memdup_user(xfern.bufs,
2794                                    sizeof(void *) * runtime->channels);
2795                 if (IS_ERR(bufs))
2796                         return PTR_ERR(bufs);
2797                 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2798                 kfree(bufs);
2799                 __put_user(result, &_xfern->result);
2800                 return result < 0 ? result : 0;
2801         }
2802         case SNDRV_PCM_IOCTL_REWIND:
2803         {
2804                 snd_pcm_uframes_t frames;
2805                 snd_pcm_uframes_t __user *_frames = arg;
2806                 snd_pcm_sframes_t result;
2807                 if (get_user(frames, _frames))
2808                         return -EFAULT;
2809                 if (put_user(0, _frames))
2810                         return -EFAULT;
2811                 result = snd_pcm_playback_rewind(substream, frames);
2812                 __put_user(result, _frames);
2813                 return result < 0 ? result : 0;
2814         }
2815         case SNDRV_PCM_IOCTL_FORWARD:
2816         {
2817                 snd_pcm_uframes_t frames;
2818                 snd_pcm_uframes_t __user *_frames = arg;
2819                 snd_pcm_sframes_t result;
2820                 if (get_user(frames, _frames))
2821                         return -EFAULT;
2822                 if (put_user(0, _frames))
2823                         return -EFAULT;
2824                 result = snd_pcm_playback_forward(substream, frames);
2825                 __put_user(result, _frames);
2826                 return result < 0 ? result : 0;
2827         }
2828         }
2829         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2830 }
2831
2832 static int snd_pcm_capture_ioctl1(struct file *file,
2833                                   struct snd_pcm_substream *substream,
2834                                   unsigned int cmd, void __user *arg)
2835 {
2836         if (snd_BUG_ON(!substream))
2837                 return -ENXIO;
2838         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2839                 return -EINVAL;
2840         switch (cmd) {
2841         case SNDRV_PCM_IOCTL_READI_FRAMES:
2842         {
2843                 struct snd_xferi xferi;
2844                 struct snd_xferi __user *_xferi = arg;
2845                 struct snd_pcm_runtime *runtime = substream->runtime;
2846                 snd_pcm_sframes_t result;
2847                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2848                         return -EBADFD;
2849                 if (put_user(0, &_xferi->result))
2850                         return -EFAULT;
2851                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2852                         return -EFAULT;
2853                 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2854                 __put_user(result, &_xferi->result);
2855                 return result < 0 ? result : 0;
2856         }
2857         case SNDRV_PCM_IOCTL_READN_FRAMES:
2858         {
2859                 struct snd_xfern xfern;
2860                 struct snd_xfern __user *_xfern = arg;
2861                 struct snd_pcm_runtime *runtime = substream->runtime;
2862                 void *bufs;
2863                 snd_pcm_sframes_t result;
2864                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2865                         return -EBADFD;
2866                 if (runtime->channels > 128)
2867                         return -EINVAL;
2868                 if (put_user(0, &_xfern->result))
2869                         return -EFAULT;
2870                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2871                         return -EFAULT;
2872
2873                 bufs = memdup_user(xfern.bufs,
2874                                    sizeof(void *) * runtime->channels);
2875                 if (IS_ERR(bufs))
2876                         return PTR_ERR(bufs);
2877                 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2878                 kfree(bufs);
2879                 __put_user(result, &_xfern->result);
2880                 return result < 0 ? result : 0;
2881         }
2882         case SNDRV_PCM_IOCTL_REWIND:
2883         {
2884                 snd_pcm_uframes_t frames;
2885                 snd_pcm_uframes_t __user *_frames = arg;
2886                 snd_pcm_sframes_t result;
2887                 if (get_user(frames, _frames))
2888                         return -EFAULT;
2889                 if (put_user(0, _frames))
2890                         return -EFAULT;
2891                 result = snd_pcm_capture_rewind(substream, frames);
2892                 __put_user(result, _frames);
2893                 return result < 0 ? result : 0;
2894         }
2895         case SNDRV_PCM_IOCTL_FORWARD:
2896         {
2897                 snd_pcm_uframes_t frames;
2898                 snd_pcm_uframes_t __user *_frames = arg;
2899                 snd_pcm_sframes_t result;
2900                 if (get_user(frames, _frames))
2901                         return -EFAULT;
2902                 if (put_user(0, _frames))
2903                         return -EFAULT;
2904                 result = snd_pcm_capture_forward(substream, frames);
2905                 __put_user(result, _frames);
2906                 return result < 0 ? result : 0;
2907         }
2908         }
2909         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2910 }
2911
2912 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2913                                    unsigned long arg)
2914 {
2915         struct snd_pcm_file *pcm_file;
2916
2917         pcm_file = file->private_data;
2918
2919         if (((cmd >> 8) & 0xff) != 'A')
2920                 return -ENOTTY;
2921
2922         return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2923                                        (void __user *)arg);
2924 }
2925
2926 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2927                                   unsigned long arg)
2928 {
2929         struct snd_pcm_file *pcm_file;
2930
2931         pcm_file = file->private_data;
2932
2933         if (((cmd >> 8) & 0xff) != 'A')
2934                 return -ENOTTY;
2935
2936         return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2937                                       (void __user *)arg);
2938 }
2939
2940 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2941                          unsigned int cmd, void *arg)
2942 {
2943         mm_segment_t fs;
2944         int result;
2945
2946         fs = snd_enter_user();
2947         switch (substream->stream) {
2948         case SNDRV_PCM_STREAM_PLAYBACK:
2949                 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2950                                                  (void __user *)arg);
2951                 break;
2952         case SNDRV_PCM_STREAM_CAPTURE:
2953                 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2954                                                 (void __user *)arg);
2955                 break;
2956         default:
2957                 result = -EINVAL;
2958                 break;
2959         }
2960         snd_leave_user(fs);
2961         return result;
2962 }
2963
2964 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2965
2966 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2967                             loff_t * offset)
2968 {
2969         struct snd_pcm_file *pcm_file;
2970         struct snd_pcm_substream *substream;
2971         struct snd_pcm_runtime *runtime;
2972         snd_pcm_sframes_t result;
2973
2974         pcm_file = file->private_data;
2975         substream = pcm_file->substream;
2976         if (PCM_RUNTIME_CHECK(substream))
2977                 return -ENXIO;
2978         runtime = substream->runtime;
2979         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2980                 return -EBADFD;
2981         if (!frame_aligned(runtime, count))
2982                 return -EINVAL;
2983         count = bytes_to_frames(runtime, count);
2984         result = snd_pcm_lib_read(substream, buf, count);
2985         if (result > 0)
2986                 result = frames_to_bytes(runtime, result);
2987         return result;
2988 }
2989
2990 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2991                              size_t count, loff_t * offset)
2992 {
2993         struct snd_pcm_file *pcm_file;
2994         struct snd_pcm_substream *substream;
2995         struct snd_pcm_runtime *runtime;
2996         snd_pcm_sframes_t result;
2997
2998         pcm_file = file->private_data;
2999         substream = pcm_file->substream;
3000         if (PCM_RUNTIME_CHECK(substream))
3001                 return -ENXIO;
3002         runtime = substream->runtime;
3003         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3004                 return -EBADFD;
3005         if (!frame_aligned(runtime, count))
3006                 return -EINVAL;
3007         count = bytes_to_frames(runtime, count);
3008         result = snd_pcm_lib_write(substream, buf, count);
3009         if (result > 0)
3010                 result = frames_to_bytes(runtime, result);
3011         return result;
3012 }
3013
3014 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
3015                              unsigned long nr_segs, loff_t pos)
3016
3017 {
3018         struct snd_pcm_file *pcm_file;
3019         struct snd_pcm_substream *substream;
3020         struct snd_pcm_runtime *runtime;
3021         snd_pcm_sframes_t result;
3022         unsigned long i;
3023         void __user **bufs;
3024         snd_pcm_uframes_t frames;
3025
3026         pcm_file = iocb->ki_filp->private_data;
3027         substream = pcm_file->substream;
3028         if (PCM_RUNTIME_CHECK(substream))
3029                 return -ENXIO;
3030         runtime = substream->runtime;
3031         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3032                 return -EBADFD;
3033         if (nr_segs > 1024 || nr_segs != runtime->channels)
3034                 return -EINVAL;
3035         if (!frame_aligned(runtime, iov->iov_len))
3036                 return -EINVAL;
3037         frames = bytes_to_samples(runtime, iov->iov_len);
3038         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
3039         if (bufs == NULL)
3040                 return -ENOMEM;
3041         for (i = 0; i < nr_segs; ++i)
3042                 bufs[i] = iov[i].iov_base;
3043         result = snd_pcm_lib_readv(substream, bufs, frames);
3044         if (result > 0)
3045                 result = frames_to_bytes(runtime, result);
3046         kfree(bufs);
3047         return result;
3048 }
3049
3050 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
3051                               unsigned long nr_segs, loff_t pos)
3052 {
3053         struct snd_pcm_file *pcm_file;
3054         struct snd_pcm_substream *substream;
3055         struct snd_pcm_runtime *runtime;
3056         snd_pcm_sframes_t result;
3057         unsigned long i;
3058         void __user **bufs;
3059         snd_pcm_uframes_t frames;
3060
3061         pcm_file = iocb->ki_filp->private_data;
3062         substream = pcm_file->substream;
3063         if (PCM_RUNTIME_CHECK(substream))
3064                 return -ENXIO;
3065         runtime = substream->runtime;
3066         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3067                 return -EBADFD;
3068         if (nr_segs > 128 || nr_segs != runtime->channels ||
3069             !frame_aligned(runtime, iov->iov_len))
3070                 return -EINVAL;
3071         frames = bytes_to_samples(runtime, iov->iov_len);
3072         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
3073         if (bufs == NULL)
3074                 return -ENOMEM;
3075         for (i = 0; i < nr_segs; ++i)
3076                 bufs[i] = iov[i].iov_base;
3077         result = snd_pcm_lib_writev(substream, bufs, frames);
3078         if (result > 0)
3079                 result = frames_to_bytes(runtime, result);
3080         kfree(bufs);
3081         return result;
3082 }
3083
3084 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
3085 {
3086         struct snd_pcm_file *pcm_file;
3087         struct snd_pcm_substream *substream;
3088         struct snd_pcm_runtime *runtime;
3089         unsigned int mask;
3090         snd_pcm_uframes_t avail;
3091
3092         pcm_file = file->private_data;
3093
3094         substream = pcm_file->substream;
3095         if (PCM_RUNTIME_CHECK(substream))
3096                 return -ENXIO;
3097         runtime = substream->runtime;
3098
3099         poll_wait(file, &runtime->sleep, wait);
3100
3101         snd_pcm_stream_lock_irq(substream);
3102         avail = snd_pcm_playback_avail(runtime);
3103         switch (runtime->status->state) {
3104         case SNDRV_PCM_STATE_RUNNING:
3105         case SNDRV_PCM_STATE_PREPARED:
3106         case SNDRV_PCM_STATE_PAUSED:
3107                 if (avail >= runtime->control->avail_min) {
3108                         mask = POLLOUT | POLLWRNORM;
3109                         break;
3110                 }
3111                 /* Fall through */
3112         case SNDRV_PCM_STATE_DRAINING:
3113                 mask = 0;
3114                 break;
3115         default:
3116                 mask = POLLOUT | POLLWRNORM | POLLERR;
3117                 break;
3118         }
3119         snd_pcm_stream_unlock_irq(substream);
3120         return mask;
3121 }
3122
3123 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
3124 {
3125         struct snd_pcm_file *pcm_file;
3126         struct snd_pcm_substream *substream;
3127         struct snd_pcm_runtime *runtime;
3128         unsigned int mask;
3129         snd_pcm_uframes_t avail;
3130
3131         pcm_file = file->private_data;
3132
3133         substream = pcm_file->substream;
3134         if (PCM_RUNTIME_CHECK(substream))
3135                 return -ENXIO;
3136         runtime = substream->runtime;
3137
3138         poll_wait(file, &runtime->sleep, wait);
3139
3140         snd_pcm_stream_lock_irq(substream);
3141         avail = snd_pcm_capture_avail(runtime);
3142         switch (runtime->status->state) {
3143         case SNDRV_PCM_STATE_RUNNING:
3144         case SNDRV_PCM_STATE_PREPARED:
3145         case SNDRV_PCM_STATE_PAUSED:
3146                 if (avail >= runtime->control->avail_min) {
3147                         mask = POLLIN | POLLRDNORM;
3148                         break;
3149                 }
3150                 mask = 0;
3151                 break;
3152         case SNDRV_PCM_STATE_DRAINING:
3153                 if (avail > 0) {
3154                         mask = POLLIN | POLLRDNORM;
3155                         break;
3156                 }
3157                 /* Fall through */
3158         default:
3159                 mask = POLLIN | POLLRDNORM | POLLERR;
3160                 break;
3161         }
3162         snd_pcm_stream_unlock_irq(substream);
3163         return mask;
3164 }
3165
3166 /*
3167  * mmap support
3168  */
3169
3170 /*
3171  * Only on coherent architectures, we can mmap the status and the control records
3172  * for effcient data transfer.  On others, we have to use HWSYNC ioctl...
3173  */
3174 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3175 /*
3176  * mmap status record
3177  */
3178 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
3179                                                 struct vm_fault *vmf)
3180 {
3181         struct snd_pcm_substream *substream = area->vm_private_data;
3182         struct snd_pcm_runtime *runtime;
3183
3184         if (substream == NULL)
3185                 return VM_FAULT_SIGBUS;
3186         runtime = substream->runtime;
3187         vmf->page = virt_to_page(runtime->status);
3188         get_page(vmf->page);
3189         return 0;
3190 }
3191
3192 static const struct vm_operations_struct snd_pcm_vm_ops_status =
3193 {
3194         .fault =        snd_pcm_mmap_status_fault,
3195 };
3196
3197 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3198                                struct vm_area_struct *area)
3199 {
3200         long size;
3201         if (!(area->vm_flags & VM_READ))
3202                 return -EINVAL;
3203         size = area->vm_end - area->vm_start;
3204         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3205                 return -EINVAL;
3206         area->vm_ops = &snd_pcm_vm_ops_status;
3207         area->vm_private_data = substream;
3208         area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3209         return 0;
3210 }
3211
3212 /*
3213  * mmap control record
3214  */
3215 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3216                                                 struct vm_fault *vmf)
3217 {
3218         struct snd_pcm_substream *substream = area->vm_private_data;
3219         struct snd_pcm_runtime *runtime;
3220
3221         if (substream == NULL)
3222                 return VM_FAULT_SIGBUS;
3223         runtime = substream->runtime;
3224         vmf->page = virt_to_page(runtime->control);
3225         get_page(vmf->page);
3226         return 0;
3227 }
3228
3229 static const struct vm_operations_struct snd_pcm_vm_ops_control =
3230 {
3231         .fault =        snd_pcm_mmap_control_fault,
3232 };
3233
3234 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3235                                 struct vm_area_struct *area)
3236 {
3237         long size;
3238         if (!(area->vm_flags & VM_READ))
3239                 return -EINVAL;
3240         size = area->vm_end - area->vm_start;
3241         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3242                 return -EINVAL;
3243         area->vm_ops = &snd_pcm_vm_ops_control;
3244         area->vm_private_data = substream;
3245         area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3246         return 0;
3247 }
3248 #else /* ! coherent mmap */
3249 /*
3250  * don't support mmap for status and control records.
3251  */
3252 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3253                                struct vm_area_struct *area)
3254 {
3255         return -ENXIO;
3256 }
3257 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3258                                 struct vm_area_struct *area)
3259 {
3260         return -ENXIO;
3261 }
3262 #endif /* coherent mmap */
3263
3264 static inline struct page *
3265 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3266 {
3267         void *vaddr = substream->runtime->dma_area + ofs;
3268         return virt_to_page(vaddr);
3269 }
3270
3271 /*
3272  * fault callback for mmapping a RAM page
3273  */
3274 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3275                                                 struct vm_fault *vmf)
3276 {
3277         struct snd_pcm_substream *substream = area->vm_private_data;
3278         struct snd_pcm_runtime *runtime;
3279         unsigned long offset;
3280         struct page * page;
3281         size_t dma_bytes;
3282
3283         if (substream == NULL)
3284                 return VM_FAULT_SIGBUS;
3285         runtime = substream->runtime;
3286         offset = vmf->pgoff << PAGE_SHIFT;
3287         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3288         if (offset > dma_bytes - PAGE_SIZE)
3289                 return VM_FAULT_SIGBUS;
3290         if (substream->ops->page)
3291                 page = substream->ops->page(substream, offset);
3292         else
3293                 page = snd_pcm_default_page_ops(substream, offset);
3294         if (!page)
3295                 return VM_FAULT_SIGBUS;
3296         get_page(page);
3297         vmf->page = page;
3298         return 0;
3299 }
3300
3301 static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3302         .open =         snd_pcm_mmap_data_open,
3303         .close =        snd_pcm_mmap_data_close,
3304 };
3305
3306 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
3307         .open =         snd_pcm_mmap_data_open,
3308         .close =        snd_pcm_mmap_data_close,
3309         .fault =        snd_pcm_mmap_data_fault,
3310 };
3311
3312 /*
3313  * mmap the DMA buffer on RAM
3314  */
3315
3316 /**
3317  * snd_pcm_lib_default_mmap - Default PCM data mmap function
3318  * @substream: PCM substream
3319  * @area: VMA
3320  *
3321  * This is the default mmap handler for PCM data.  When mmap pcm_ops is NULL,
3322  * this function is invoked implicitly.
3323  */
3324 int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3325                              struct vm_area_struct *area)
3326 {
3327         area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3328 #ifdef CONFIG_GENERIC_ALLOCATOR
3329         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) {
3330                 area->vm_page_prot = pgprot_writecombine(area->vm_page_prot);
3331                 return remap_pfn_range(area, area->vm_start,
3332                                 substream->dma_buffer.addr >> PAGE_SHIFT,
3333                                 area->vm_end - area->vm_start, area->vm_page_prot);
3334         }
3335 #endif /* CONFIG_GENERIC_ALLOCATOR */
3336 #ifndef CONFIG_X86 /* for avoiding warnings arch/x86/mm/pat.c */
3337         if (!substream->ops->page &&
3338             substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3339                 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3340                                          area,
3341                                          substream->runtime->dma_area,
3342                                          substream->runtime->dma_addr,
3343                                          area->vm_end - area->vm_start);
3344 #endif /* CONFIG_X86 */
3345         /* mmap with fault handler */
3346         area->vm_ops = &snd_pcm_vm_ops_data_fault;
3347         return 0;
3348 }
3349 EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
3350
3351 /*
3352  * mmap the DMA buffer on I/O memory area
3353  */
3354 #if SNDRV_PCM_INFO_MMAP_IOMEM
3355 /**
3356  * snd_pcm_lib_mmap_iomem - Default PCM data mmap function for I/O mem
3357  * @substream: PCM substream
3358  * @area: VMA
3359  *
3360  * When your hardware uses the iomapped pages as the hardware buffer and
3361  * wants to mmap it, pass this function as mmap pcm_ops.  Note that this
3362  * is supposed to work only on limited architectures.
3363  */
3364 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3365                            struct vm_area_struct *area)
3366 {
3367         struct snd_pcm_runtime *runtime = substream->runtime;;
3368
3369         area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3370         return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes);
3371 }
3372
3373 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3374 #endif /* SNDRV_PCM_INFO_MMAP */
3375
3376 /*
3377  * mmap DMA buffer
3378  */
3379 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3380                       struct vm_area_struct *area)
3381 {
3382         struct snd_pcm_runtime *runtime;
3383         long size;
3384         unsigned long offset;
3385         size_t dma_bytes;
3386         int err;
3387
3388         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3389                 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3390                         return -EINVAL;
3391         } else {
3392                 if (!(area->vm_flags & VM_READ))
3393                         return -EINVAL;
3394         }
3395         runtime = substream->runtime;
3396         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3397                 return -EBADFD;
3398         if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3399                 return -ENXIO;
3400         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3401             runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3402                 return -EINVAL;
3403         size = area->vm_end - area->vm_start;
3404         offset = area->vm_pgoff << PAGE_SHIFT;
3405         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3406         if ((size_t)size > dma_bytes)
3407                 return -EINVAL;
3408         if (offset > dma_bytes - size)
3409                 return -EINVAL;
3410
3411         area->vm_ops = &snd_pcm_vm_ops_data;
3412         area->vm_private_data = substream;
3413         if (substream->ops->mmap)
3414                 err = substream->ops->mmap(substream, area);
3415         else
3416                 err = snd_pcm_lib_default_mmap(substream, area);
3417         if (!err)
3418                 atomic_inc(&substream->mmap_count);
3419         return err;
3420 }
3421
3422 EXPORT_SYMBOL(snd_pcm_mmap_data);
3423
3424 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3425 {
3426         struct snd_pcm_file * pcm_file;
3427         struct snd_pcm_substream *substream;
3428         unsigned long offset;
3429
3430         pcm_file = file->private_data;
3431         substream = pcm_file->substream;
3432         if (PCM_RUNTIME_CHECK(substream))
3433                 return -ENXIO;
3434
3435         offset = area->vm_pgoff << PAGE_SHIFT;
3436         switch (offset) {
3437         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3438                 if (pcm_file->no_compat_mmap)
3439                         return -ENXIO;
3440                 return snd_pcm_mmap_status(substream, file, area);
3441         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3442                 if (pcm_file->no_compat_mmap)
3443                         return -ENXIO;
3444                 return snd_pcm_mmap_control(substream, file, area);
3445         default:
3446                 return snd_pcm_mmap_data(substream, file, area);
3447         }
3448         return 0;
3449 }
3450
3451 static int snd_pcm_fasync(int fd, struct file * file, int on)
3452 {
3453         struct snd_pcm_file * pcm_file;
3454         struct snd_pcm_substream *substream;
3455         struct snd_pcm_runtime *runtime;
3456
3457         pcm_file = file->private_data;
3458         substream = pcm_file->substream;
3459         if (PCM_RUNTIME_CHECK(substream))
3460                 return -ENXIO;
3461         runtime = substream->runtime;
3462         return fasync_helper(fd, file, on, &runtime->fasync);
3463 }
3464
3465 /*
3466  * ioctl32 compat
3467  */
3468 #ifdef CONFIG_COMPAT
3469 #include "pcm_compat.c"
3470 #else
3471 #define snd_pcm_ioctl_compat    NULL
3472 #endif
3473
3474 /*
3475  *  To be removed helpers to keep binary compatibility
3476  */
3477
3478 #ifdef CONFIG_SND_SUPPORT_OLD_API
3479 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3480 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3481
3482 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3483                                                struct snd_pcm_hw_params_old *oparams)
3484 {
3485         unsigned int i;
3486
3487         memset(params, 0, sizeof(*params));
3488         params->flags = oparams->flags;
3489         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3490                 params->masks[i].bits[0] = oparams->masks[i];
3491         memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3492         params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3493         params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3494         params->info = oparams->info;
3495         params->msbits = oparams->msbits;
3496         params->rate_num = oparams->rate_num;
3497         params->rate_den = oparams->rate_den;
3498         params->fifo_size = oparams->fifo_size;
3499 }
3500
3501 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3502                                              struct snd_pcm_hw_params *params)
3503 {
3504         unsigned int i;
3505
3506         memset(oparams, 0, sizeof(*oparams));
3507         oparams->flags = params->flags;
3508         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3509                 oparams->masks[i] = params->masks[i].bits[0];
3510         memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3511         oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3512         oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3513         oparams->info = params->info;
3514         oparams->msbits = params->msbits;
3515         oparams->rate_num = params->rate_num;
3516         oparams->rate_den = params->rate_den;
3517         oparams->fifo_size = params->fifo_size;
3518 }
3519
3520 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3521                                       struct snd_pcm_hw_params_old __user * _oparams)
3522 {
3523         struct snd_pcm_hw_params *params;
3524         struct snd_pcm_hw_params_old *oparams = NULL;
3525         int err;
3526
3527         params = kmalloc(sizeof(*params), GFP_KERNEL);
3528         if (!params)
3529                 return -ENOMEM;
3530
3531         oparams = memdup_user(_oparams, sizeof(*oparams));
3532         if (IS_ERR(oparams)) {
3533                 err = PTR_ERR(oparams);
3534                 goto out;
3535         }
3536         snd_pcm_hw_convert_from_old_params(params, oparams);
3537         err = snd_pcm_hw_refine(substream, params);
3538         snd_pcm_hw_convert_to_old_params(oparams, params);
3539         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3540                 if (!err)
3541                         err = -EFAULT;
3542         }
3543
3544         kfree(oparams);
3545 out:
3546         kfree(params);
3547         return err;
3548 }
3549
3550 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3551                                       struct snd_pcm_hw_params_old __user * _oparams)
3552 {
3553         struct snd_pcm_hw_params *params;
3554         struct snd_pcm_hw_params_old *oparams = NULL;
3555         int err;
3556
3557         params = kmalloc(sizeof(*params), GFP_KERNEL);
3558         if (!params)
3559                 return -ENOMEM;
3560
3561         oparams = memdup_user(_oparams, sizeof(*oparams));
3562         if (IS_ERR(oparams)) {
3563                 err = PTR_ERR(oparams);
3564                 goto out;
3565         }
3566         snd_pcm_hw_convert_from_old_params(params, oparams);
3567         err = snd_pcm_hw_params(substream, params);
3568         snd_pcm_hw_convert_to_old_params(oparams, params);
3569         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3570                 if (!err)
3571                         err = -EFAULT;
3572         }
3573
3574         kfree(oparams);
3575 out:
3576         kfree(params);
3577         return err;
3578 }
3579 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3580
3581 #ifndef CONFIG_MMU
3582 static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3583                                                unsigned long addr,
3584                                                unsigned long len,
3585                                                unsigned long pgoff,
3586                                                unsigned long flags)
3587 {
3588         struct snd_pcm_file *pcm_file = file->private_data;
3589         struct snd_pcm_substream *substream = pcm_file->substream;
3590         struct snd_pcm_runtime *runtime = substream->runtime;
3591         unsigned long offset = pgoff << PAGE_SHIFT;
3592
3593         switch (offset) {
3594         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3595                 return (unsigned long)runtime->status;
3596         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3597                 return (unsigned long)runtime->control;
3598         default:
3599                 return (unsigned long)runtime->dma_area + offset;
3600         }
3601 }
3602 #else
3603 # define snd_pcm_get_unmapped_area NULL
3604 #endif
3605
3606 /*
3607  *  Register section
3608  */
3609
3610 const struct file_operations snd_pcm_f_ops[2] = {
3611         {
3612                 .owner =                THIS_MODULE,
3613                 .write =                snd_pcm_write,
3614                 .aio_write =            snd_pcm_aio_write,
3615                 .open =                 snd_pcm_playback_open,
3616                 .release =              snd_pcm_release,
3617                 .llseek =               no_llseek,
3618                 .poll =                 snd_pcm_playback_poll,
3619                 .unlocked_ioctl =       snd_pcm_playback_ioctl,
3620                 .compat_ioctl =         snd_pcm_ioctl_compat,
3621                 .mmap =                 snd_pcm_mmap,
3622                 .fasync =               snd_pcm_fasync,
3623                 .get_unmapped_area =    snd_pcm_get_unmapped_area,
3624         },
3625         {
3626                 .owner =                THIS_MODULE,
3627                 .read =                 snd_pcm_read,
3628                 .aio_read =             snd_pcm_aio_read,
3629                 .open =                 snd_pcm_capture_open,
3630                 .release =              snd_pcm_release,
3631                 .llseek =               no_llseek,
3632                 .poll =                 snd_pcm_capture_poll,
3633                 .unlocked_ioctl =       snd_pcm_capture_ioctl,
3634                 .compat_ioctl =         snd_pcm_ioctl_compat,
3635                 .mmap =                 snd_pcm_mmap,
3636                 .fasync =               snd_pcm_fasync,
3637                 .get_unmapped_area =    snd_pcm_get_unmapped_area,
3638         }
3639 };