sound/core/pcm_compat.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *   32bit -> 64bit ioctl wrapper for PCM API
   4  *   Copyright (c) by Takashi Iwai <tiwai@suse.de>
   5  */
   6
   7 /* This file included from pcm_native.c */
   8
   9 #include <linux/compat.h>
  10 #include <linux/slab.h>
  11
  12 static int snd_pcm_ioctl_delay_compat(struct snd_pcm_substream *substream,
  13                                       s32 __user *src)
  14 {
  15         snd_pcm_sframes_t delay;
  16         int err;
  17
  18         err = snd_pcm_delay(substream, &delay);
  19         if (err)
  20                 return err;
  21         if (put_user(delay, src))
  22                 return -EFAULT;
  23         return 0;
  24 }
  25
  26 static int snd_pcm_ioctl_rewind_compat(struct snd_pcm_substream *substream,
  27                                        u32 __user *src)
  28 {
  29         snd_pcm_uframes_t frames;
  30         int err;
  31
  32         if (get_user(frames, src))
  33                 return -EFAULT;
  34         err = snd_pcm_rewind(substream, frames);
  35         if (put_user(err, src))
  36                 return -EFAULT;
  37         return err < 0 ? err : 0;
  38 }
  39
  40 static int snd_pcm_ioctl_forward_compat(struct snd_pcm_substream *substream,
  41                                        u32 __user *src)
  42 {
  43         snd_pcm_uframes_t frames;
  44         int err;
  45
  46         if (get_user(frames, src))
  47                 return -EFAULT;
  48         err = snd_pcm_forward(substream, frames);
  49         if (put_user(err, src))
  50                 return -EFAULT;
  51         return err < 0 ? err : 0;
  52 }
  53
  54 struct snd_pcm_hw_params32 {
  55         u32 flags;
  56         struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; /* this must be identical */
  57         struct snd_mask mres[5];        /* reserved masks */
  58         struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
  59         struct snd_interval ires[9];    /* reserved intervals */
  60         u32 rmask;
  61         u32 cmask;
  62         u32 info;
  63         u32 msbits;
  64         u32 rate_num;
  65         u32 rate_den;
  66         u32 fifo_size;
  67         unsigned char reserved[64];
  68 };
  69
  70 struct snd_pcm_sw_params32 {
  71         s32 tstamp_mode;
  72         u32 period_step;
  73         u32 sleep_min;
  74         u32 avail_min;
  75         u32 xfer_align;
  76         u32 start_threshold;
  77         u32 stop_threshold;
  78         u32 silence_threshold;
  79         u32 silence_size;
  80         u32 boundary;
  81         u32 proto;
  82         u32 tstamp_type;
  83         unsigned char reserved[56];
  84 };
  85
  86 static int snd_pcm_ioctl_sw_params_compat(struct snd_pcm_substream *substream,
  87                                           struct snd_pcm_sw_params32 __user *src)
  88 {
  89         struct snd_pcm_sw_params params;
  90         snd_pcm_uframes_t boundary;
  91         int err;
  92
  93         memset(&params, 0, sizeof(params));
  94         if (get_user(params.tstamp_mode, &src->tstamp_mode) ||
  95             get_user(params.period_step, &src->period_step) ||
  96             get_user(params.sleep_min, &src->sleep_min) ||
  97             get_user(params.avail_min, &src->avail_min) ||
  98             get_user(params.xfer_align, &src->xfer_align) ||
  99             get_user(params.start_threshold, &src->start_threshold) ||
 100             get_user(params.stop_threshold, &src->stop_threshold) ||
 101             get_user(params.silence_threshold, &src->silence_threshold) ||
 102             get_user(params.silence_size, &src->silence_size) ||
 103             get_user(params.tstamp_type, &src->tstamp_type) ||
 104             get_user(params.proto, &src->proto))
 105                 return -EFAULT;
 106         /*
 107          * Check silent_size parameter.  Since we have 64bit boundary,
 108          * silence_size must be compared with the 32bit boundary.
 109          */
 110         boundary = recalculate_boundary(substream->runtime);
 111         if (boundary && params.silence_size >= boundary)
 112                 params.silence_size = substream->runtime->boundary;
 113         err = snd_pcm_sw_params(substream, &params);
 114         if (err < 0)
 115                 return err;
 116         if (boundary && put_user(boundary, &src->boundary))
 117                 return -EFAULT;
 118         return err;
 119 }
 120
 121 struct snd_pcm_channel_info32 {
 122         u32 channel;
 123         u32 offset;
 124         u32 first;
 125         u32 step;
 126 };
 127
 128 static int snd_pcm_ioctl_channel_info_compat(struct snd_pcm_substream *substream,
 129                                              struct snd_pcm_channel_info32 __user *src)
 130 {
 131         struct snd_pcm_channel_info info;
 132         int err;
 133
 134         if (get_user(info.channel, &src->channel) ||
 135             get_user(info.offset, &src->offset) ||
 136             get_user(info.first, &src->first) ||
 137             get_user(info.step, &src->step))
 138                 return -EFAULT;
 139         err = snd_pcm_channel_info(substream, &info);
 140         if (err < 0)
 141                 return err;
 142         if (put_user(info.channel, &src->channel) ||
 143             put_user(info.offset, &src->offset) ||
 144             put_user(info.first, &src->first) ||
 145             put_user(info.step, &src->step))
 146                 return -EFAULT;
 147         return err;
 148 }
 149
 150 #ifdef CONFIG_X86_X32
 151 /* X32 ABI has the same struct as x86-64 for snd_pcm_channel_info */
 152 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
 153                                      struct snd_pcm_channel_info __user *src);
 154 #define snd_pcm_ioctl_channel_info_x32(s, p)    \
 155         snd_pcm_channel_info_user(s, p)
 156 #endif /* CONFIG_X86_X32 */
 157
 158 struct compat_snd_pcm_status64 {
 159         snd_pcm_state_t state;
 160         u8 rsvd[4]; /* alignment */
 161         s64 trigger_tstamp_sec;
 162         s64 trigger_tstamp_nsec;
 163         s64 tstamp_sec;
 164         s64 tstamp_nsec;
 165         u32 appl_ptr;
 166         u32 hw_ptr;
 167         s32 delay;
 168         u32 avail;
 169         u32 avail_max;
 170         u32 overrange;
 171         snd_pcm_state_t suspended_state;
 172         u32 audio_tstamp_data;
 173         s64 audio_tstamp_sec;
 174         s64 audio_tstamp_nsec;
 175         s64 driver_tstamp_sec;
 176         s64 driver_tstamp_nsec;
 177         u32 audio_tstamp_accuracy;
 178         unsigned char reserved[52-4*sizeof(s64)];
 179 } __packed;
 180
 181 static int snd_pcm_status_user_compat64(struct snd_pcm_substream *substream,
 182                                         struct compat_snd_pcm_status64 __user *src,
 183                                         bool ext)
 184 {
 185         struct snd_pcm_status64 status;
 186         struct compat_snd_pcm_status64 compat_status64;
 187         int err;
 188
 189         memset(&status, 0, sizeof(status));
 190         memset(&compat_status64, 0, sizeof(compat_status64));
 191         /*
 192          * with extension, parameters are read/write,
 193          * get audio_tstamp_data from user,
 194          * ignore rest of status structure
 195          */
 196         if (ext && get_user(status.audio_tstamp_data,
 197                                 (u32 __user *)(&src->audio_tstamp_data)))
 198                 return -EFAULT;
 199         err = snd_pcm_status64(substream, &status);
 200         if (err < 0)
 201                 return err;
 202
 203         if (clear_user(src, sizeof(*src)))
 204                 return -EFAULT;
 205
 206         compat_status64 = (struct compat_snd_pcm_status64) {
 207                 .state = status.state,
 208                 .trigger_tstamp_sec = status.trigger_tstamp_sec,
 209                 .trigger_tstamp_nsec = status.trigger_tstamp_nsec,
 210                 .tstamp_sec = status.tstamp_sec,
 211                 .tstamp_nsec = status.tstamp_nsec,
 212                 .appl_ptr = status.appl_ptr,
 213                 .hw_ptr = status.hw_ptr,
 214                 .delay = status.delay,
 215                 .avail = status.avail,
 216                 .avail_max = status.avail_max,
 217                 .overrange = status.overrange,
 218                 .suspended_state = status.suspended_state,
 219                 .audio_tstamp_data = status.audio_tstamp_data,
 220                 .audio_tstamp_sec = status.audio_tstamp_sec,
 221                 .audio_tstamp_nsec = status.audio_tstamp_nsec,
 222                 .driver_tstamp_sec = status.audio_tstamp_sec,
 223                 .driver_tstamp_nsec = status.audio_tstamp_nsec,
 224                 .audio_tstamp_accuracy = status.audio_tstamp_accuracy,
 225         };
 226
 227         if (copy_to_user(src, &compat_status64, sizeof(compat_status64)))
 228                 return -EFAULT;
 229
 230         return err;
 231 }
 232
 233 /* both for HW_PARAMS and HW_REFINE */
 234 static int snd_pcm_ioctl_hw_params_compat(struct snd_pcm_substream *substream,
 235                                           int refine,
 236                                           struct snd_pcm_hw_params32 __user *data32)
 237 {
 238         struct snd_pcm_hw_params *data;
 239         struct snd_pcm_runtime *runtime;
 240         int err;
 241
 242         if (! (runtime = substream->runtime))
 243                 return -ENOTTY;
 244
 245         data = kmalloc(sizeof(*data), GFP_KERNEL);
 246         if (!data)
 247                 return -ENOMEM;
 248
 249         /* only fifo_size (RO from userspace) is different, so just copy all */
 250         if (copy_from_user(data, data32, sizeof(*data32))) {
 251                 err = -EFAULT;
 252                 goto error;
 253         }
 254
 255         if (refine)
 256                 err = snd_pcm_hw_refine(substream, data);
 257         else
 258                 err = snd_pcm_hw_params(substream, data);
 259         if (err < 0)
 260                 goto error;
 261         if (copy_to_user(data32, data, sizeof(*data32)) ||
 262             put_user(data->fifo_size, &data32->fifo_size)) {
 263                 err = -EFAULT;
 264                 goto error;
 265         }
 266
 267         if (! refine) {
 268                 unsigned int new_boundary = recalculate_boundary(runtime);
 269                 if (new_boundary)
 270                         runtime->boundary = new_boundary;
 271         }
 272  error:
 273         kfree(data);
 274         return err;
 275 }
 276
 277
 278 /*
 279  */
 280 struct snd_xferi32 {
 281         s32 result;
 282         u32 buf;
 283         u32 frames;
 284 };
 285
 286 static int snd_pcm_ioctl_xferi_compat(struct snd_pcm_substream *substream,
 287                                       int dir, struct snd_xferi32 __user *data32)
 288 {
 289         compat_caddr_t buf;
 290         u32 frames;
 291         int err;
 292
 293         if (! substream->runtime)
 294                 return -ENOTTY;
 295         if (substream->stream != dir)
 296                 return -EINVAL;
 297         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN)
 298                 return -EBADFD;
 299
 300         if (get_user(buf, &data32->buf) ||
 301             get_user(frames, &data32->frames))
 302                 return -EFAULT;
 303
 304         if (dir == SNDRV_PCM_STREAM_PLAYBACK)
 305                 err = snd_pcm_lib_write(substream, compat_ptr(buf), frames);
 306         else
 307                 err = snd_pcm_lib_read(substream, compat_ptr(buf), frames);
 308         if (err < 0)
 309                 return err;
 310         /* copy the result */
 311         if (put_user(err, &data32->result))
 312                 return -EFAULT;
 313         return 0;
 314 }
 315
 316
 317 /* snd_xfern needs remapping of bufs */
 318 struct snd_xfern32 {
 319         s32 result;
 320         u32 bufs;  /* this is void **; */
 321         u32 frames;
 322 };
 323
 324 /*
 325  * xfern ioctl nees to copy (up to) 128 pointers on stack.
 326  * although we may pass the copied pointers through f_op->ioctl, but the ioctl
 327  * handler there expands again the same 128 pointers on stack, so it is better
 328  * to handle the function (calling pcm_readv/writev) directly in this handler.
 329  */
 330 static int snd_pcm_ioctl_xfern_compat(struct snd_pcm_substream *substream,
 331                                       int dir, struct snd_xfern32 __user *data32)
 332 {
 333         compat_caddr_t buf;
 334         compat_caddr_t __user *bufptr;
 335         u32 frames;
 336         void __user **bufs;
 337         int err, ch, i;
 338
 339         if (! substream->runtime)
 340                 return -ENOTTY;
 341         if (substream->stream != dir)
 342                 return -EINVAL;
 343         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN)
 344                 return -EBADFD;
 345
 346         if ((ch = substream->runtime->channels) > 128)
 347                 return -EINVAL;
 348         if (get_user(buf, &data32->bufs) ||
 349             get_user(frames, &data32->frames))
 350                 return -EFAULT;
 351         bufptr = compat_ptr(buf);
 352         bufs = kmalloc_array(ch, sizeof(void __user *), GFP_KERNEL);
 353         if (bufs == NULL)
 354                 return -ENOMEM;
 355         for (i = 0; i < ch; i++) {
 356                 u32 ptr;
 357                 if (get_user(ptr, bufptr)) {
 358                         kfree(bufs);
 359                         return -EFAULT;
 360                 }
 361                 bufs[i] = compat_ptr(ptr);
 362                 bufptr++;
 363         }
 364         if (dir == SNDRV_PCM_STREAM_PLAYBACK)
 365                 err = snd_pcm_lib_writev(substream, bufs, frames);
 366         else
 367                 err = snd_pcm_lib_readv(substream, bufs, frames);
 368         if (err >= 0) {
 369                 if (put_user(err, &data32->result))
 370                         err = -EFAULT;
 371         }
 372         kfree(bufs);
 373         return err;
 374 }
 375
 376 #ifdef CONFIG_X86_X32
 377 /* X32 ABI has 64bit timespec and 64bit alignment */
 378 struct snd_pcm_mmap_status_x32 {
 379         snd_pcm_state_t state;
 380         s32 pad1;
 381         u32 hw_ptr;
 382         u32 pad2; /* alignment */
 383         s64 tstamp_sec;
 384         s64 tstamp_nsec;
 385         snd_pcm_state_t suspended_state;
 386         s32 pad3;
 387         s64 audio_tstamp_sec;
 388         s64 audio_tstamp_nsec;
 389 } __packed;
 390
 391 struct snd_pcm_mmap_control_x32 {
 392         u32 appl_ptr;
 393         u32 avail_min;
 394 };
 395
 396 struct snd_pcm_sync_ptr_x32 {
 397         u32 flags;
 398         u32 rsvd; /* alignment */
 399         union {
 400                 struct snd_pcm_mmap_status_x32 status;
 401                 unsigned char reserved[64];
 402         } s;
 403         union {
 404                 struct snd_pcm_mmap_control_x32 control;
 405                 unsigned char reserved[64];
 406         } c;
 407 } __packed;
 408
 409 static int snd_pcm_ioctl_sync_ptr_x32(struct snd_pcm_substream *substream,
 410                                       struct snd_pcm_sync_ptr_x32 __user *src)
 411 {
 412         struct snd_pcm_runtime *runtime = substream->runtime;
 413         volatile struct snd_pcm_mmap_status *status;
 414         volatile struct snd_pcm_mmap_control *control;
 415         u32 sflags;
 416         struct snd_pcm_mmap_control scontrol;
 417         struct snd_pcm_mmap_status sstatus;
 418         snd_pcm_uframes_t boundary;
 419         int err;
 420
 421         if (snd_BUG_ON(!runtime))
 422                 return -EINVAL;
 423
 424         if (get_user(sflags, &src->flags) ||
 425             get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
 426             get_user(scontrol.avail_min, &src->c.control.avail_min))
 427                 return -EFAULT;
 428         if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
 429                 err = snd_pcm_hwsync(substream);
 430                 if (err < 0)
 431                         return err;
 432         }
 433         status = runtime->status;
 434         control = runtime->control;
 435         boundary = recalculate_boundary(runtime);
 436         if (!boundary)
 437                 boundary = 0x7fffffff;
 438         snd_pcm_stream_lock_irq(substream);
 439         /* FIXME: we should consider the boundary for the sync from app */
 440         if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
 441                 control->appl_ptr = scontrol.appl_ptr;
 442         else
 443                 scontrol.appl_ptr = control->appl_ptr % boundary;
 444         if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
 445                 control->avail_min = scontrol.avail_min;
 446         else
 447                 scontrol.avail_min = control->avail_min;
 448         sstatus.state = status->state;
 449         sstatus.hw_ptr = status->hw_ptr % boundary;
 450         sstatus.tstamp = status->tstamp;
 451         sstatus.suspended_state = status->suspended_state;
 452         sstatus.audio_tstamp = status->audio_tstamp;
 453         snd_pcm_stream_unlock_irq(substream);
 454         if (put_user(sstatus.state, &src->s.status.state) ||
 455             put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) ||
 456             put_user(sstatus.tstamp.tv_sec, &src->s.status.tstamp_sec) ||
 457             put_user(sstatus.tstamp.tv_nsec, &src->s.status.tstamp_nsec) ||
 458             put_user(sstatus.suspended_state, &src->s.status.suspended_state) ||
 459             put_user(sstatus.audio_tstamp.tv_sec, &src->s.status.audio_tstamp_sec) ||
 460             put_user(sstatus.audio_tstamp.tv_nsec, &src->s.status.audio_tstamp_nsec) ||
 461             put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
 462             put_user(scontrol.avail_min, &src->c.control.avail_min))
 463                 return -EFAULT;
 464
 465         return 0;
 466 }
 467 #endif /* CONFIG_X86_X32 */
 468
 469 /*
 470  */
 471 enum {
 472         SNDRV_PCM_IOCTL_HW_REFINE32 = _IOWR('A', 0x10, struct snd_pcm_hw_params32),
 473         SNDRV_PCM_IOCTL_HW_PARAMS32 = _IOWR('A', 0x11, struct snd_pcm_hw_params32),
 474         SNDRV_PCM_IOCTL_SW_PARAMS32 = _IOWR('A', 0x13, struct snd_pcm_sw_params32),
 475         SNDRV_PCM_IOCTL_STATUS_COMPAT32 = _IOR('A', 0x20, struct snd_pcm_status32),
 476         SNDRV_PCM_IOCTL_STATUS_EXT_COMPAT32 = _IOWR('A', 0x24, struct snd_pcm_status32),
 477         SNDRV_PCM_IOCTL_DELAY32 = _IOR('A', 0x21, s32),
 478         SNDRV_PCM_IOCTL_CHANNEL_INFO32 = _IOR('A', 0x32, struct snd_pcm_channel_info32),
 479         SNDRV_PCM_IOCTL_REWIND32 = _IOW('A', 0x46, u32),
 480         SNDRV_PCM_IOCTL_FORWARD32 = _IOW('A', 0x49, u32),
 481         SNDRV_PCM_IOCTL_WRITEI_FRAMES32 = _IOW('A', 0x50, struct snd_xferi32),
 482         SNDRV_PCM_IOCTL_READI_FRAMES32 = _IOR('A', 0x51, struct snd_xferi32),
 483         SNDRV_PCM_IOCTL_WRITEN_FRAMES32 = _IOW('A', 0x52, struct snd_xfern32),
 484         SNDRV_PCM_IOCTL_READN_FRAMES32 = _IOR('A', 0x53, struct snd_xfern32),
 485         SNDRV_PCM_IOCTL_STATUS_COMPAT64 = _IOR('A', 0x20, struct compat_snd_pcm_status64),
 486         SNDRV_PCM_IOCTL_STATUS_EXT_COMPAT64 = _IOWR('A', 0x24, struct compat_snd_pcm_status64),
 487 #ifdef CONFIG_X86_X32
 488         SNDRV_PCM_IOCTL_CHANNEL_INFO_X32 = _IOR('A', 0x32, struct snd_pcm_channel_info),
 489         SNDRV_PCM_IOCTL_SYNC_PTR_X32 = _IOWR('A', 0x23, struct snd_pcm_sync_ptr_x32),
 490 #endif /* CONFIG_X86_X32 */
 491 };
 492
 493 static long snd_pcm_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
 494 {
 495         struct snd_pcm_file *pcm_file;
 496         struct snd_pcm_substream *substream;
 497         void __user *argp = compat_ptr(arg);
 498
 499         pcm_file = file->private_data;
 500         if (! pcm_file)
 501                 return -ENOTTY;
 502         substream = pcm_file->substream;
 503         if (! substream)
 504                 return -ENOTTY;
 505
 506         /*
 507          * When PCM is used on 32bit mode, we need to disable
 508          * mmap of the old PCM status/control records because
 509          * of the size incompatibility.
 510          */
 511         pcm_file->no_compat_mmap = 1;
 512
 513         switch (cmd) {
 514         case SNDRV_PCM_IOCTL_PVERSION:
 515         case SNDRV_PCM_IOCTL_INFO:
 516         case SNDRV_PCM_IOCTL_TSTAMP:
 517         case SNDRV_PCM_IOCTL_TTSTAMP:
 518         case SNDRV_PCM_IOCTL_USER_PVERSION:
 519         case SNDRV_PCM_IOCTL_HWSYNC:
 520         case SNDRV_PCM_IOCTL_PREPARE:
 521         case SNDRV_PCM_IOCTL_RESET:
 522         case SNDRV_PCM_IOCTL_START:
 523         case SNDRV_PCM_IOCTL_DROP:
 524         case SNDRV_PCM_IOCTL_DRAIN:
 525         case SNDRV_PCM_IOCTL_PAUSE:
 526         case SNDRV_PCM_IOCTL_HW_FREE:
 527         case SNDRV_PCM_IOCTL_RESUME:
 528         case SNDRV_PCM_IOCTL_XRUN:
 529         case SNDRV_PCM_IOCTL_LINK:
 530         case SNDRV_PCM_IOCTL_UNLINK:
 531         case __SNDRV_PCM_IOCTL_SYNC_PTR32:
 532                 return snd_pcm_common_ioctl(file, substream, cmd, argp);
 533         case __SNDRV_PCM_IOCTL_SYNC_PTR64:
 534 #ifdef CONFIG_X86_X32
 535                 if (in_x32_syscall())
 536                         return snd_pcm_ioctl_sync_ptr_x32(substream, argp);
 537 #endif /* CONFIG_X86_X32 */
 538                 return snd_pcm_common_ioctl(file, substream, cmd, argp);
 539         case SNDRV_PCM_IOCTL_HW_REFINE32:
 540                 return snd_pcm_ioctl_hw_params_compat(substream, 1, argp);
 541         case SNDRV_PCM_IOCTL_HW_PARAMS32:
 542                 return snd_pcm_ioctl_hw_params_compat(substream, 0, argp);
 543         case SNDRV_PCM_IOCTL_SW_PARAMS32:
 544                 return snd_pcm_ioctl_sw_params_compat(substream, argp);
 545         case SNDRV_PCM_IOCTL_STATUS_COMPAT32:
 546                 return snd_pcm_status_user32(substream, argp, false);
 547         case SNDRV_PCM_IOCTL_STATUS_EXT_COMPAT32:
 548                 return snd_pcm_status_user32(substream, argp, true);
 549         case SNDRV_PCM_IOCTL_CHANNEL_INFO32:
 550                 return snd_pcm_ioctl_channel_info_compat(substream, argp);
 551         case SNDRV_PCM_IOCTL_WRITEI_FRAMES32:
 552                 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
 553         case SNDRV_PCM_IOCTL_READI_FRAMES32:
 554                 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
 555         case SNDRV_PCM_IOCTL_WRITEN_FRAMES32:
 556                 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
 557         case SNDRV_PCM_IOCTL_READN_FRAMES32:
 558                 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
 559         case SNDRV_PCM_IOCTL_DELAY32:
 560                 return snd_pcm_ioctl_delay_compat(substream, argp);
 561         case SNDRV_PCM_IOCTL_REWIND32:
 562                 return snd_pcm_ioctl_rewind_compat(substream, argp);
 563         case SNDRV_PCM_IOCTL_FORWARD32:
 564                 return snd_pcm_ioctl_forward_compat(substream, argp);
 565         case SNDRV_PCM_IOCTL_STATUS_COMPAT64:
 566                 return snd_pcm_status_user_compat64(substream, argp, false);
 567         case SNDRV_PCM_IOCTL_STATUS_EXT_COMPAT64:
 568                 return snd_pcm_status_user_compat64(substream, argp, true);
 569 #ifdef CONFIG_X86_X32
 570         case SNDRV_PCM_IOCTL_CHANNEL_INFO_X32:
 571                 return snd_pcm_ioctl_channel_info_x32(substream, argp);
 572 #endif /* CONFIG_X86_X32 */
 573         }
 574
 575         return -ENOIOCTLCMD;
 576 }