sound/core/pcm_compat.c

   1 /*
   2  *   32bit -> 64bit ioctl wrapper for PCM API
   3  *   Copyright (c) by Takashi Iwai <tiwai@suse.de>
   4  *
   5  *   This program is free software; you can redistribute it and/or modify
   6  *   it under the terms of the GNU General Public License as published by
   7  *   the Free Software Foundation; either version 2 of the License, or
   8  *   (at your option) any later version.
   9  *
  10  *   This program is distributed in the hope that it will be useful,
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *   GNU General Public License for more details.
  14  *
  15  *   You should have received a copy of the GNU General Public License
  16  *   along with this program; if not, write to the Free Software
  17  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  18  *
  19  */
  20
  21 /* This file included from pcm_native.c */
  22
  23 #include <linux/compat.h>
  24 #include <linux/slab.h>
  25
  26 static int snd_pcm_ioctl_delay_compat(struct snd_pcm_substream *substream,
  27                                       s32 __user *src)
  28 {
  29         snd_pcm_sframes_t delay;
  30
  31         delay = snd_pcm_delay(substream);
  32         if (delay < 0)
  33                 return delay;
  34         if (put_user(delay, src))
  35                 return -EFAULT;
  36         return 0;
  37 }
  38
  39 static int snd_pcm_ioctl_rewind_compat(struct snd_pcm_substream *substream,
  40                                        u32 __user *src)
  41 {
  42         snd_pcm_uframes_t frames;
  43         int err;
  44
  45         if (get_user(frames, src))
  46                 return -EFAULT;
  47         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
  48                 err = snd_pcm_playback_rewind(substream, frames);
  49         else
  50                 err = snd_pcm_capture_rewind(substream, frames);
  51         if (put_user(err, src))
  52                 return -EFAULT;
  53         return err < 0 ? err : 0;
  54 }
  55
  56 static int snd_pcm_ioctl_forward_compat(struct snd_pcm_substream *substream,
  57                                        u32 __user *src)
  58 {
  59         snd_pcm_uframes_t frames;
  60         int err;
  61
  62         if (get_user(frames, src))
  63                 return -EFAULT;
  64         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
  65                 err = snd_pcm_playback_forward(substream, frames);
  66         else
  67                 err = snd_pcm_capture_forward(substream, frames);
  68         if (put_user(err, src))
  69                 return -EFAULT;
  70         return err < 0 ? err : 0;
  71 }
  72
  73 struct snd_pcm_hw_params32 {
  74         u32 flags;
  75         struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; /* this must be identical */
  76         struct snd_mask mres[5];        /* reserved masks */
  77         struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
  78         struct snd_interval ires[9];    /* reserved intervals */
  79         u32 rmask;
  80         u32 cmask;
  81         u32 info;
  82         u32 msbits;
  83         u32 rate_num;
  84         u32 rate_den;
  85         u32 fifo_size;
  86         unsigned char reserved[64];
  87 };
  88
  89 struct snd_pcm_sw_params32 {
  90         s32 tstamp_mode;
  91         u32 period_step;
  92         u32 sleep_min;
  93         u32 avail_min;
  94         u32 xfer_align;
  95         u32 start_threshold;
  96         u32 stop_threshold;
  97         u32 silence_threshold;
  98         u32 silence_size;
  99         u32 boundary;
 100         u32 proto;
 101         u32 tstamp_type;
 102         unsigned char reserved[56];
 103 };
 104
 105 /* recalcuate the boundary within 32bit */
 106 static snd_pcm_uframes_t recalculate_boundary(struct snd_pcm_runtime *runtime)
 107 {
 108         snd_pcm_uframes_t boundary;
 109
 110         if (! runtime->buffer_size)
 111                 return 0;
 112         boundary = runtime->buffer_size;
 113         while (boundary * 2 <= 0x7fffffffUL - runtime->buffer_size)
 114                 boundary *= 2;
 115         return boundary;
 116 }
 117
 118 static int snd_pcm_ioctl_sw_params_compat(struct snd_pcm_substream *substream,
 119                                           struct snd_pcm_sw_params32 __user *src)
 120 {
 121         struct snd_pcm_sw_params params;
 122         snd_pcm_uframes_t boundary;
 123         int err;
 124
 125         memset(&params, 0, sizeof(params));
 126         if (get_user(params.tstamp_mode, &src->tstamp_mode) ||
 127             get_user(params.period_step, &src->period_step) ||
 128             get_user(params.sleep_min, &src->sleep_min) ||
 129             get_user(params.avail_min, &src->avail_min) ||
 130             get_user(params.xfer_align, &src->xfer_align) ||
 131             get_user(params.start_threshold, &src->start_threshold) ||
 132             get_user(params.stop_threshold, &src->stop_threshold) ||
 133             get_user(params.silence_threshold, &src->silence_threshold) ||
 134             get_user(params.silence_size, &src->silence_size) ||
 135             get_user(params.tstamp_type, &src->tstamp_type) ||
 136             get_user(params.proto, &src->proto))
 137                 return -EFAULT;
 138         /*
 139          * Check silent_size parameter.  Since we have 64bit boundary,
 140          * silence_size must be compared with the 32bit boundary.
 141          */
 142         boundary = recalculate_boundary(substream->runtime);
 143         if (boundary && params.silence_size >= boundary)
 144                 params.silence_size = substream->runtime->boundary;
 145         err = snd_pcm_sw_params(substream, &params);
 146         if (err < 0)
 147                 return err;
 148         if (boundary && put_user(boundary, &src->boundary))
 149                 return -EFAULT;
 150         return err;
 151 }
 152
 153 struct snd_pcm_channel_info32 {
 154         u32 channel;
 155         u32 offset;
 156         u32 first;
 157         u32 step;
 158 };
 159
 160 static int snd_pcm_ioctl_channel_info_compat(struct snd_pcm_substream *substream,
 161                                              struct snd_pcm_channel_info32 __user *src)
 162 {
 163         struct snd_pcm_channel_info info;
 164         int err;
 165
 166         if (get_user(info.channel, &src->channel) ||
 167             get_user(info.offset, &src->offset) ||
 168             get_user(info.first, &src->first) ||
 169             get_user(info.step, &src->step))
 170                 return -EFAULT;
 171         err = snd_pcm_channel_info(substream, &info);
 172         if (err < 0)
 173                 return err;
 174         if (put_user(info.channel, &src->channel) ||
 175             put_user(info.offset, &src->offset) ||
 176             put_user(info.first, &src->first) ||
 177             put_user(info.step, &src->step))
 178                 return -EFAULT;
 179         return err;
 180 }
 181
 182 #ifdef CONFIG_X86_X32
 183 /* X32 ABI has the same struct as x86-64 for snd_pcm_channel_info */
 184 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
 185                                      struct snd_pcm_channel_info __user *src);
 186 #define snd_pcm_ioctl_channel_info_x32(s, p)    \
 187         snd_pcm_channel_info_user(s, p)
 188 #endif /* CONFIG_X86_X32 */
 189
 190 struct snd_pcm_status32 {
 191         s32 state;
 192         struct compat_timespec trigger_tstamp;
 193         struct compat_timespec tstamp;
 194         u32 appl_ptr;
 195         u32 hw_ptr;
 196         s32 delay;
 197         u32 avail;
 198         u32 avail_max;
 199         u32 overrange;
 200         s32 suspended_state;
 201         u32 audio_tstamp_data;
 202         struct compat_timespec audio_tstamp;
 203         struct compat_timespec driver_tstamp;
 204         u32 audio_tstamp_accuracy;
 205         unsigned char reserved[52-2*sizeof(struct compat_timespec)];
 206 } __attribute__((packed));
 207
 208
 209 static int snd_pcm_status_user_compat(struct snd_pcm_substream *substream,
 210                                       struct snd_pcm_status32 __user *src,
 211                                       bool ext)
 212 {
 213         struct snd_pcm_status status;
 214         int err;
 215
 216         memset(&status, 0, sizeof(status));
 217         /*
 218          * with extension, parameters are read/write,
 219          * get audio_tstamp_data from user,
 220          * ignore rest of status structure
 221          */
 222         if (ext && get_user(status.audio_tstamp_data,
 223                                 (u32 __user *)(&src->audio_tstamp_data)))
 224                 return -EFAULT;
 225         err = snd_pcm_status(substream, &status);
 226         if (err < 0)
 227                 return err;
 228
 229         if (clear_user(src, sizeof(*src)))
 230                 return -EFAULT;
 231         if (put_user(status.state, &src->state) ||
 232             compat_put_timespec(&status.trigger_tstamp, &src->trigger_tstamp) ||
 233             compat_put_timespec(&status.tstamp, &src->tstamp) ||
 234             put_user(status.appl_ptr, &src->appl_ptr) ||
 235             put_user(status.hw_ptr, &src->hw_ptr) ||
 236             put_user(status.delay, &src->delay) ||
 237             put_user(status.avail, &src->avail) ||
 238             put_user(status.avail_max, &src->avail_max) ||
 239             put_user(status.overrange, &src->overrange) ||
 240             put_user(status.suspended_state, &src->suspended_state) ||
 241             put_user(status.audio_tstamp_data, &src->audio_tstamp_data) ||
 242             compat_put_timespec(&status.audio_tstamp, &src->audio_tstamp) ||
 243             compat_put_timespec(&status.driver_tstamp, &src->driver_tstamp) ||
 244             put_user(status.audio_tstamp_accuracy, &src->audio_tstamp_accuracy))
 245                 return -EFAULT;
 246
 247         return err;
 248 }
 249
 250 #ifdef CONFIG_X86_X32
 251 /* X32 ABI has 64bit timespec and 64bit alignment */
 252 struct snd_pcm_status_x32 {
 253         s32 state;
 254         u32 rsvd; /* alignment */
 255         struct timespec trigger_tstamp;
 256         struct timespec tstamp;
 257         u32 appl_ptr;
 258         u32 hw_ptr;
 259         s32 delay;
 260         u32 avail;
 261         u32 avail_max;
 262         u32 overrange;
 263         s32 suspended_state;
 264         u32 audio_tstamp_data;
 265         struct timespec audio_tstamp;
 266         struct timespec driver_tstamp;
 267         u32 audio_tstamp_accuracy;
 268         unsigned char reserved[52-2*sizeof(struct timespec)];
 269 } __packed;
 270
 271 #define put_timespec(src, dst) copy_to_user(dst, src, sizeof(*dst))
 272
 273 static int snd_pcm_status_user_x32(struct snd_pcm_substream *substream,
 274                                    struct snd_pcm_status_x32 __user *src,
 275                                    bool ext)
 276 {
 277         struct snd_pcm_status status;
 278         int err;
 279
 280         memset(&status, 0, sizeof(status));
 281         /*
 282          * with extension, parameters are read/write,
 283          * get audio_tstamp_data from user,
 284          * ignore rest of status structure
 285          */
 286         if (ext && get_user(status.audio_tstamp_data,
 287                                 (u32 __user *)(&src->audio_tstamp_data)))
 288                 return -EFAULT;
 289         err = snd_pcm_status(substream, &status);
 290         if (err < 0)
 291                 return err;
 292
 293         if (clear_user(src, sizeof(*src)))
 294                 return -EFAULT;
 295         if (put_user(status.state, &src->state) ||
 296             put_timespec(&status.trigger_tstamp, &src->trigger_tstamp) ||
 297             put_timespec(&status.tstamp, &src->tstamp) ||
 298             put_user(status.appl_ptr, &src->appl_ptr) ||
 299             put_user(status.hw_ptr, &src->hw_ptr) ||
 300             put_user(status.delay, &src->delay) ||
 301             put_user(status.avail, &src->avail) ||
 302             put_user(status.avail_max, &src->avail_max) ||
 303             put_user(status.overrange, &src->overrange) ||
 304             put_user(status.suspended_state, &src->suspended_state) ||
 305             put_user(status.audio_tstamp_data, &src->audio_tstamp_data) ||
 306             put_timespec(&status.audio_tstamp, &src->audio_tstamp) ||
 307             put_timespec(&status.driver_tstamp, &src->driver_tstamp) ||
 308             put_user(status.audio_tstamp_accuracy, &src->audio_tstamp_accuracy))
 309                 return -EFAULT;
 310
 311         return err;
 312 }
 313 #endif /* CONFIG_X86_X32 */
 314
 315 /* both for HW_PARAMS and HW_REFINE */
 316 static int snd_pcm_ioctl_hw_params_compat(struct snd_pcm_substream *substream,
 317                                           int refine,
 318                                           struct snd_pcm_hw_params32 __user *data32)
 319 {
 320         struct snd_pcm_hw_params *data;
 321         struct snd_pcm_runtime *runtime;
 322         int err;
 323
 324         if (! (runtime = substream->runtime))
 325                 return -ENOTTY;
 326
 327         data = kmalloc(sizeof(*data), GFP_KERNEL);
 328         if (!data)
 329                 return -ENOMEM;
 330
 331         /* only fifo_size (RO from userspace) is different, so just copy all */
 332         if (copy_from_user(data, data32, sizeof(*data32))) {
 333                 err = -EFAULT;
 334                 goto error;
 335         }
 336
 337         if (refine)
 338                 err = snd_pcm_hw_refine(substream, data);
 339         else
 340                 err = snd_pcm_hw_params(substream, data);
 341         if (err < 0)
 342                 goto error;
 343         if (copy_to_user(data32, data, sizeof(*data32)) ||
 344             put_user(data->fifo_size, &data32->fifo_size)) {
 345                 err = -EFAULT;
 346                 goto error;
 347         }
 348
 349         if (! refine) {
 350                 unsigned int new_boundary = recalculate_boundary(runtime);
 351                 if (new_boundary)
 352                         runtime->boundary = new_boundary;
 353         }
 354  error:
 355         kfree(data);
 356         return err;
 357 }
 358
 359
 360 /*
 361  */
 362 struct snd_xferi32 {
 363         s32 result;
 364         u32 buf;
 365         u32 frames;
 366 };
 367
 368 static int snd_pcm_ioctl_xferi_compat(struct snd_pcm_substream *substream,
 369                                       int dir, struct snd_xferi32 __user *data32)
 370 {
 371         compat_caddr_t buf;
 372         u32 frames;
 373         int err;
 374
 375         if (! substream->runtime)
 376                 return -ENOTTY;
 377         if (substream->stream != dir)
 378                 return -EINVAL;
 379         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN)
 380                 return -EBADFD;
 381
 382         if (get_user(buf, &data32->buf) ||
 383             get_user(frames, &data32->frames))
 384                 return -EFAULT;
 385
 386         if (dir == SNDRV_PCM_STREAM_PLAYBACK)
 387                 err = snd_pcm_lib_write(substream, compat_ptr(buf), frames);
 388         else
 389                 err = snd_pcm_lib_read(substream, compat_ptr(buf), frames);
 390         if (err < 0)
 391                 return err;
 392         /* copy the result */
 393         if (put_user(err, &data32->result))
 394                 return -EFAULT;
 395         return 0;
 396 }
 397
 398
 399 /* snd_xfern needs remapping of bufs */
 400 struct snd_xfern32 {
 401         s32 result;
 402         u32 bufs;  /* this is void **; */
 403         u32 frames;
 404 };
 405
 406 /*
 407  * xfern ioctl nees to copy (up to) 128 pointers on stack.
 408  * although we may pass the copied pointers through f_op->ioctl, but the ioctl
 409  * handler there expands again the same 128 pointers on stack, so it is better
 410  * to handle the function (calling pcm_readv/writev) directly in this handler.
 411  */
 412 static int snd_pcm_ioctl_xfern_compat(struct snd_pcm_substream *substream,
 413                                       int dir, struct snd_xfern32 __user *data32)
 414 {
 415         compat_caddr_t buf;
 416         compat_caddr_t __user *bufptr;
 417         u32 frames;
 418         void __user **bufs;
 419         int err, ch, i;
 420
 421         if (! substream->runtime)
 422                 return -ENOTTY;
 423         if (substream->stream != dir)
 424                 return -EINVAL;
 425
 426         if ((ch = substream->runtime->channels) > 128)
 427                 return -EINVAL;
 428         if (get_user(buf, &data32->bufs) ||
 429             get_user(frames, &data32->frames))
 430                 return -EFAULT;
 431         bufptr = compat_ptr(buf);
 432         bufs = kmalloc(sizeof(void __user *) * ch, GFP_KERNEL);
 433         if (bufs == NULL)
 434                 return -ENOMEM;
 435         for (i = 0; i < ch; i++) {
 436                 u32 ptr;
 437                 if (get_user(ptr, bufptr)) {
 438                         kfree(bufs);
 439                         return -EFAULT;
 440                 }
 441                 bufs[i] = compat_ptr(ptr);
 442                 bufptr++;
 443         }
 444         if (dir == SNDRV_PCM_STREAM_PLAYBACK)
 445                 err = snd_pcm_lib_writev(substream, bufs, frames);
 446         else
 447                 err = snd_pcm_lib_readv(substream, bufs, frames);
 448         if (err >= 0) {
 449                 if (put_user(err, &data32->result))
 450                         err = -EFAULT;
 451         }
 452         kfree(bufs);
 453         return err;
 454 }
 455
 456
 457 struct snd_pcm_mmap_status32 {
 458         s32 state;
 459         s32 pad1;
 460         u32 hw_ptr;
 461         struct compat_timespec tstamp;
 462         s32 suspended_state;
 463         struct compat_timespec audio_tstamp;
 464 } __attribute__((packed));
 465
 466 struct snd_pcm_mmap_control32 {
 467         u32 appl_ptr;
 468         u32 avail_min;
 469 };
 470
 471 struct snd_pcm_sync_ptr32 {
 472         u32 flags;
 473         union {
 474                 struct snd_pcm_mmap_status32 status;
 475                 unsigned char reserved[64];
 476         } s;
 477         union {
 478                 struct snd_pcm_mmap_control32 control;
 479                 unsigned char reserved[64];
 480         } c;
 481 } __attribute__((packed));
 482
 483 static int snd_pcm_ioctl_sync_ptr_compat(struct snd_pcm_substream *substream,
 484                                          struct snd_pcm_sync_ptr32 __user *src)
 485 {
 486         struct snd_pcm_runtime *runtime = substream->runtime;
 487         volatile struct snd_pcm_mmap_status *status;
 488         volatile struct snd_pcm_mmap_control *control;
 489         u32 sflags;
 490         struct snd_pcm_mmap_control scontrol;
 491         struct snd_pcm_mmap_status sstatus;
 492         snd_pcm_uframes_t boundary;
 493         int err;
 494
 495         if (snd_BUG_ON(!runtime))
 496                 return -EINVAL;
 497
 498         if (get_user(sflags, &src->flags) ||
 499             get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
 500             get_user(scontrol.avail_min, &src->c.control.avail_min))
 501                 return -EFAULT;
 502         if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
 503                 err = snd_pcm_hwsync(substream);
 504                 if (err < 0)
 505                         return err;
 506         }
 507         status = runtime->status;
 508         control = runtime->control;
 509         boundary = recalculate_boundary(runtime);
 510         if (! boundary)
 511                 boundary = 0x7fffffff;
 512         snd_pcm_stream_lock_irq(substream);
 513         /* FIXME: we should consider the boundary for the sync from app */
 514         if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
 515                 control->appl_ptr = scontrol.appl_ptr;
 516         else
 517                 scontrol.appl_ptr = control->appl_ptr % boundary;
 518         if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
 519                 control->avail_min = scontrol.avail_min;
 520         else
 521                 scontrol.avail_min = control->avail_min;
 522         sstatus.state = status->state;
 523         sstatus.hw_ptr = status->hw_ptr % boundary;
 524         sstatus.tstamp = status->tstamp;
 525         sstatus.suspended_state = status->suspended_state;
 526         sstatus.audio_tstamp = status->audio_tstamp;
 527         snd_pcm_stream_unlock_irq(substream);
 528         if (put_user(sstatus.state, &src->s.status.state) ||
 529             put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) ||
 530             compat_put_timespec(&sstatus.tstamp, &src->s.status.tstamp) ||
 531             put_user(sstatus.suspended_state, &src->s.status.suspended_state) ||
 532             compat_put_timespec(&sstatus.audio_tstamp,
 533                     &src->s.status.audio_tstamp) ||
 534             put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
 535             put_user(scontrol.avail_min, &src->c.control.avail_min))
 536                 return -EFAULT;
 537
 538         return 0;
 539 }
 540
 541 #ifdef CONFIG_X86_X32
 542 /* X32 ABI has 64bit timespec and 64bit alignment */
 543 struct snd_pcm_mmap_status_x32 {
 544         s32 state;
 545         s32 pad1;
 546         u32 hw_ptr;
 547         u32 pad2; /* alignment */
 548         struct timespec tstamp;
 549         s32 suspended_state;
 550         s32 pad3;
 551         struct timespec audio_tstamp;
 552 } __packed;
 553
 554 struct snd_pcm_mmap_control_x32 {
 555         u32 appl_ptr;
 556         u32 avail_min;
 557 };
 558
 559 struct snd_pcm_sync_ptr_x32 {
 560         u32 flags;
 561         u32 rsvd; /* alignment */
 562         union {
 563                 struct snd_pcm_mmap_status_x32 status;
 564                 unsigned char reserved[64];
 565         } s;
 566         union {
 567                 struct snd_pcm_mmap_control_x32 control;
 568                 unsigned char reserved[64];
 569         } c;
 570 } __packed;
 571
 572 static int snd_pcm_ioctl_sync_ptr_x32(struct snd_pcm_substream *substream,
 573                                       struct snd_pcm_sync_ptr_x32 __user *src)
 574 {
 575         struct snd_pcm_runtime *runtime = substream->runtime;
 576         volatile struct snd_pcm_mmap_status *status;
 577         volatile struct snd_pcm_mmap_control *control;
 578         u32 sflags;
 579         struct snd_pcm_mmap_control scontrol;
 580         struct snd_pcm_mmap_status sstatus;
 581         snd_pcm_uframes_t boundary;
 582         int err;
 583
 584         if (snd_BUG_ON(!runtime))
 585                 return -EINVAL;
 586
 587         if (get_user(sflags, &src->flags) ||
 588             get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
 589             get_user(scontrol.avail_min, &src->c.control.avail_min))
 590                 return -EFAULT;
 591         if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
 592                 err = snd_pcm_hwsync(substream);
 593                 if (err < 0)
 594                         return err;
 595         }
 596         status = runtime->status;
 597         control = runtime->control;
 598         boundary = recalculate_boundary(runtime);
 599         if (!boundary)
 600                 boundary = 0x7fffffff;
 601         snd_pcm_stream_lock_irq(substream);
 602         /* FIXME: we should consider the boundary for the sync from app */
 603         if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
 604                 control->appl_ptr = scontrol.appl_ptr;
 605         else
 606                 scontrol.appl_ptr = control->appl_ptr % boundary;
 607         if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
 608                 control->avail_min = scontrol.avail_min;
 609         else
 610                 scontrol.avail_min = control->avail_min;
 611         sstatus.state = status->state;
 612         sstatus.hw_ptr = status->hw_ptr % boundary;
 613         sstatus.tstamp = status->tstamp;
 614         sstatus.suspended_state = status->suspended_state;
 615         sstatus.audio_tstamp = status->audio_tstamp;
 616         snd_pcm_stream_unlock_irq(substream);
 617         if (put_user(sstatus.state, &src->s.status.state) ||
 618             put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) ||
 619             put_timespec(&sstatus.tstamp, &src->s.status.tstamp) ||
 620             put_user(sstatus.suspended_state, &src->s.status.suspended_state) ||
 621             put_timespec(&sstatus.audio_tstamp, &src->s.status.audio_tstamp) ||
 622             put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
 623             put_user(scontrol.avail_min, &src->c.control.avail_min))
 624                 return -EFAULT;
 625
 626         return 0;
 627 }
 628 #endif /* CONFIG_X86_X32 */
 629
 630 /*
 631  */
 632 enum {
 633         SNDRV_PCM_IOCTL_HW_REFINE32 = _IOWR('A', 0x10, struct snd_pcm_hw_params32),
 634         SNDRV_PCM_IOCTL_HW_PARAMS32 = _IOWR('A', 0x11, struct snd_pcm_hw_params32),
 635         SNDRV_PCM_IOCTL_SW_PARAMS32 = _IOWR('A', 0x13, struct snd_pcm_sw_params32),
 636         SNDRV_PCM_IOCTL_STATUS32 = _IOR('A', 0x20, struct snd_pcm_status32),
 637         SNDRV_PCM_IOCTL_STATUS_EXT32 = _IOWR('A', 0x24, struct snd_pcm_status32),
 638         SNDRV_PCM_IOCTL_DELAY32 = _IOR('A', 0x21, s32),
 639         SNDRV_PCM_IOCTL_CHANNEL_INFO32 = _IOR('A', 0x32, struct snd_pcm_channel_info32),
 640         SNDRV_PCM_IOCTL_REWIND32 = _IOW('A', 0x46, u32),
 641         SNDRV_PCM_IOCTL_FORWARD32 = _IOW('A', 0x49, u32),
 642         SNDRV_PCM_IOCTL_WRITEI_FRAMES32 = _IOW('A', 0x50, struct snd_xferi32),
 643         SNDRV_PCM_IOCTL_READI_FRAMES32 = _IOR('A', 0x51, struct snd_xferi32),
 644         SNDRV_PCM_IOCTL_WRITEN_FRAMES32 = _IOW('A', 0x52, struct snd_xfern32),
 645         SNDRV_PCM_IOCTL_READN_FRAMES32 = _IOR('A', 0x53, struct snd_xfern32),
 646         SNDRV_PCM_IOCTL_SYNC_PTR32 = _IOWR('A', 0x23, struct snd_pcm_sync_ptr32),
 647 #ifdef CONFIG_X86_X32
 648         SNDRV_PCM_IOCTL_CHANNEL_INFO_X32 = _IOR('A', 0x32, struct snd_pcm_channel_info),
 649         SNDRV_PCM_IOCTL_STATUS_X32 = _IOR('A', 0x20, struct snd_pcm_status_x32),
 650         SNDRV_PCM_IOCTL_STATUS_EXT_X32 = _IOWR('A', 0x24, struct snd_pcm_status_x32),
 651         SNDRV_PCM_IOCTL_SYNC_PTR_X32 = _IOWR('A', 0x23, struct snd_pcm_sync_ptr_x32),
 652 #endif /* CONFIG_X86_X32 */
 653 };
 654
 655 static long snd_pcm_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
 656 {
 657         struct snd_pcm_file *pcm_file;
 658         struct snd_pcm_substream *substream;
 659         void __user *argp = compat_ptr(arg);
 660
 661         pcm_file = file->private_data;
 662         if (! pcm_file)
 663                 return -ENOTTY;
 664         substream = pcm_file->substream;
 665         if (! substream)
 666                 return -ENOTTY;
 667
 668         /*
 669          * When PCM is used on 32bit mode, we need to disable
 670          * mmap of PCM status/control records because of the size
 671          * incompatibility.
 672          */
 673         pcm_file->no_compat_mmap = 1;
 674
 675         switch (cmd) {
 676         case SNDRV_PCM_IOCTL_PVERSION:
 677         case SNDRV_PCM_IOCTL_INFO:
 678         case SNDRV_PCM_IOCTL_TSTAMP:
 679         case SNDRV_PCM_IOCTL_TTSTAMP:
 680         case SNDRV_PCM_IOCTL_USER_PVERSION:
 681         case SNDRV_PCM_IOCTL_HWSYNC:
 682         case SNDRV_PCM_IOCTL_PREPARE:
 683         case SNDRV_PCM_IOCTL_RESET:
 684         case SNDRV_PCM_IOCTL_START:
 685         case SNDRV_PCM_IOCTL_DROP:
 686         case SNDRV_PCM_IOCTL_DRAIN:
 687         case SNDRV_PCM_IOCTL_PAUSE:
 688         case SNDRV_PCM_IOCTL_HW_FREE:
 689         case SNDRV_PCM_IOCTL_RESUME:
 690         case SNDRV_PCM_IOCTL_XRUN:
 691         case SNDRV_PCM_IOCTL_LINK:
 692         case SNDRV_PCM_IOCTL_UNLINK:
 693                 return snd_pcm_common_ioctl(file, substream, cmd, argp);
 694         case SNDRV_PCM_IOCTL_HW_REFINE32:
 695                 return snd_pcm_ioctl_hw_params_compat(substream, 1, argp);
 696         case SNDRV_PCM_IOCTL_HW_PARAMS32:
 697                 return snd_pcm_ioctl_hw_params_compat(substream, 0, argp);
 698         case SNDRV_PCM_IOCTL_SW_PARAMS32:
 699                 return snd_pcm_ioctl_sw_params_compat(substream, argp);
 700         case SNDRV_PCM_IOCTL_STATUS32:
 701                 return snd_pcm_status_user_compat(substream, argp, false);
 702         case SNDRV_PCM_IOCTL_STATUS_EXT32:
 703                 return snd_pcm_status_user_compat(substream, argp, true);
 704         case SNDRV_PCM_IOCTL_SYNC_PTR32:
 705                 return snd_pcm_ioctl_sync_ptr_compat(substream, argp);
 706         case SNDRV_PCM_IOCTL_CHANNEL_INFO32:
 707                 return snd_pcm_ioctl_channel_info_compat(substream, argp);
 708         case SNDRV_PCM_IOCTL_WRITEI_FRAMES32:
 709                 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
 710         case SNDRV_PCM_IOCTL_READI_FRAMES32:
 711                 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
 712         case SNDRV_PCM_IOCTL_WRITEN_FRAMES32:
 713                 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
 714         case SNDRV_PCM_IOCTL_READN_FRAMES32:
 715                 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
 716         case SNDRV_PCM_IOCTL_DELAY32:
 717                 return snd_pcm_ioctl_delay_compat(substream, argp);
 718         case SNDRV_PCM_IOCTL_REWIND32:
 719                 return snd_pcm_ioctl_rewind_compat(substream, argp);
 720         case SNDRV_PCM_IOCTL_FORWARD32:
 721                 return snd_pcm_ioctl_forward_compat(substream, argp);
 722 #ifdef CONFIG_X86_X32
 723         case SNDRV_PCM_IOCTL_STATUS_X32:
 724                 return snd_pcm_status_user_x32(substream, argp, false);
 725         case SNDRV_PCM_IOCTL_STATUS_EXT_X32:
 726                 return snd_pcm_status_user_x32(substream, argp, true);
 727         case SNDRV_PCM_IOCTL_SYNC_PTR_X32:
 728                 return snd_pcm_ioctl_sync_ptr_x32(substream, argp);
 729         case SNDRV_PCM_IOCTL_CHANNEL_INFO_X32:
 730                 return snd_pcm_ioctl_channel_info_x32(substream, argp);
 731 #endif /* CONFIG_X86_X32 */
 732         }
 733
 734         return -ENOIOCTLCMD;
 735 }