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
snd_pcm_ioctl_delay_compat(struct snd_pcm_substream * substream,s32 __user * src)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
snd_pcm_ioctl_rewind_compat(struct snd_pcm_substream * substream,u32 __user * src)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
snd_pcm_ioctl_forward_compat(struct snd_pcm_substream * substream,u32 __user * src)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
snd_pcm_ioctl_sw_params_compat(struct snd_pcm_substream * substream,struct snd_pcm_sw_params32 __user * src)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(¶ms, 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, ¶ms);
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
snd_pcm_ioctl_channel_info_compat(struct snd_pcm_substream * substream,struct snd_pcm_channel_info32 __user * src)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_ABI
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_ABI */
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
snd_pcm_status_user_compat64(struct snd_pcm_substream * substream,struct compat_snd_pcm_status64 __user * src,bool ext)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 */
snd_pcm_ioctl_hw_params_compat(struct snd_pcm_substream * substream,int refine,struct snd_pcm_hw_params32 __user * data32)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 __free(kfree) = NULL;
239 struct snd_pcm_runtime *runtime;
240 int err;
241
242 runtime = substream->runtime;
243 if (!runtime)
244 return -ENOTTY;
245
246 data = kmalloc(sizeof(*data), GFP_KERNEL);
247 if (!data)
248 return -ENOMEM;
249
250 /* only fifo_size (RO from userspace) is different, so just copy all */
251 if (copy_from_user(data, data32, sizeof(*data32)))
252 return -EFAULT;
253
254 if (refine) {
255 err = snd_pcm_hw_refine(substream, data);
256 if (err < 0)
257 return err;
258 err = fixup_unreferenced_params(substream, data);
259 } else {
260 err = snd_pcm_hw_params(substream, data);
261 }
262 if (err < 0)
263 return err;
264 if (copy_to_user(data32, data, sizeof(*data32)) ||
265 put_user(data->fifo_size, &data32->fifo_size))
266 return -EFAULT;
267
268 if (! refine) {
269 unsigned int new_boundary = recalculate_boundary(runtime);
270 if (new_boundary)
271 runtime->boundary = new_boundary;
272 }
273 return err;
274 }
275
276
277 /*
278 */
279 struct snd_xferi32 {
280 s32 result;
281 u32 buf;
282 u32 frames;
283 };
284
snd_pcm_ioctl_xferi_compat(struct snd_pcm_substream * substream,int dir,struct snd_xferi32 __user * data32)285 static int snd_pcm_ioctl_xferi_compat(struct snd_pcm_substream *substream,
286 int dir, struct snd_xferi32 __user *data32)
287 {
288 compat_caddr_t buf;
289 u32 frames;
290 int err;
291
292 if (! substream->runtime)
293 return -ENOTTY;
294 if (substream->stream != dir)
295 return -EINVAL;
296 if (substream->runtime->state == SNDRV_PCM_STATE_OPEN)
297 return -EBADFD;
298
299 if (get_user(buf, &data32->buf) ||
300 get_user(frames, &data32->frames))
301 return -EFAULT;
302
303 if (dir == SNDRV_PCM_STREAM_PLAYBACK)
304 err = snd_pcm_lib_write(substream, compat_ptr(buf), frames);
305 else
306 err = snd_pcm_lib_read(substream, compat_ptr(buf), frames);
307 if (err < 0)
308 return err;
309 /* copy the result */
310 if (put_user(err, &data32->result))
311 return -EFAULT;
312 return 0;
313 }
314
315
316 /* snd_xfern needs remapping of bufs */
317 struct snd_xfern32 {
318 s32 result;
319 u32 bufs; /* this is void **; */
320 u32 frames;
321 };
322
323 /*
324 * xfern ioctl nees to copy (up to) 128 pointers on stack.
325 * although we may pass the copied pointers through f_op->ioctl, but the ioctl
326 * handler there expands again the same 128 pointers on stack, so it is better
327 * to handle the function (calling pcm_readv/writev) directly in this handler.
328 */
snd_pcm_ioctl_xfern_compat(struct snd_pcm_substream * substream,int dir,struct snd_xfern32 __user * data32)329 static int snd_pcm_ioctl_xfern_compat(struct snd_pcm_substream *substream,
330 int dir, struct snd_xfern32 __user *data32)
331 {
332 compat_caddr_t buf;
333 compat_caddr_t __user *bufptr;
334 u32 frames;
335 void __user **bufs __free(kfree) = NULL;
336 int err, ch, i;
337
338 if (! substream->runtime)
339 return -ENOTTY;
340 if (substream->stream != dir)
341 return -EINVAL;
342 if (substream->runtime->state == SNDRV_PCM_STATE_OPEN)
343 return -EBADFD;
344
345 ch = substream->runtime->channels;
346 if (ch > 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 return -EFAULT;
359 bufs[i] = compat_ptr(ptr);
360 bufptr++;
361 }
362 if (dir == SNDRV_PCM_STREAM_PLAYBACK)
363 err = snd_pcm_lib_writev(substream, bufs, frames);
364 else
365 err = snd_pcm_lib_readv(substream, bufs, frames);
366 if (err >= 0) {
367 if (put_user(err, &data32->result))
368 return -EFAULT;
369 }
370 return err;
371 }
372
373 #ifdef CONFIG_X86_X32_ABI
374 /* X32 ABI has 64bit timespec and 64bit alignment */
375 struct snd_pcm_mmap_status_x32 {
376 snd_pcm_state_t state;
377 s32 pad1;
378 u32 hw_ptr;
379 u32 pad2; /* alignment */
380 s64 tstamp_sec;
381 s64 tstamp_nsec;
382 snd_pcm_state_t suspended_state;
383 s32 pad3;
384 s64 audio_tstamp_sec;
385 s64 audio_tstamp_nsec;
386 } __packed;
387
388 struct snd_pcm_mmap_control_x32 {
389 u32 appl_ptr;
390 u32 avail_min;
391 };
392
393 struct snd_pcm_sync_ptr_x32 {
394 u32 flags;
395 u32 rsvd; /* alignment */
396 union {
397 struct snd_pcm_mmap_status_x32 status;
398 unsigned char reserved[64];
399 } s;
400 union {
401 struct snd_pcm_mmap_control_x32 control;
402 unsigned char reserved[64];
403 } c;
404 } __packed;
405
snd_pcm_ioctl_sync_ptr_x32(struct snd_pcm_substream * substream,struct snd_pcm_sync_ptr_x32 __user * src)406 static int snd_pcm_ioctl_sync_ptr_x32(struct snd_pcm_substream *substream,
407 struct snd_pcm_sync_ptr_x32 __user *src)
408 {
409 struct snd_pcm_runtime *runtime = substream->runtime;
410 volatile struct snd_pcm_mmap_status *status;
411 volatile struct snd_pcm_mmap_control *control;
412 u32 sflags;
413 struct snd_pcm_mmap_control scontrol;
414 struct snd_pcm_mmap_status sstatus;
415 snd_pcm_uframes_t boundary;
416 int err;
417
418 if (snd_BUG_ON(!runtime))
419 return -EINVAL;
420
421 if (get_user(sflags, &src->flags) ||
422 get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
423 get_user(scontrol.avail_min, &src->c.control.avail_min))
424 return -EFAULT;
425 if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
426 err = snd_pcm_hwsync(substream);
427 if (err < 0)
428 return err;
429 }
430 status = runtime->status;
431 control = runtime->control;
432 boundary = recalculate_boundary(runtime);
433 if (!boundary)
434 boundary = 0x7fffffff;
435 scoped_guard(pcm_stream_lock_irq, substream) {
436 /* FIXME: we should consider the boundary for the sync from app */
437 if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
438 control->appl_ptr = scontrol.appl_ptr;
439 else
440 scontrol.appl_ptr = control->appl_ptr % boundary;
441 if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
442 control->avail_min = scontrol.avail_min;
443 else
444 scontrol.avail_min = control->avail_min;
445 sstatus.state = status->state;
446 sstatus.hw_ptr = status->hw_ptr % boundary;
447 sstatus.tstamp = status->tstamp;
448 sstatus.suspended_state = status->suspended_state;
449 sstatus.audio_tstamp = status->audio_tstamp;
450 }
451 if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
452 snd_pcm_dma_buffer_sync(substream, SNDRV_DMA_SYNC_DEVICE);
453 if (put_user(sstatus.state, &src->s.status.state) ||
454 put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) ||
455 put_user(sstatus.tstamp.tv_sec, &src->s.status.tstamp_sec) ||
456 put_user(sstatus.tstamp.tv_nsec, &src->s.status.tstamp_nsec) ||
457 put_user(sstatus.suspended_state, &src->s.status.suspended_state) ||
458 put_user(sstatus.audio_tstamp.tv_sec, &src->s.status.audio_tstamp_sec) ||
459 put_user(sstatus.audio_tstamp.tv_nsec, &src->s.status.audio_tstamp_nsec) ||
460 put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
461 put_user(scontrol.avail_min, &src->c.control.avail_min))
462 return -EFAULT;
463
464 return 0;
465 }
466 #endif /* CONFIG_X86_X32_ABI */
467
468 #ifdef __BIG_ENDIAN
469 typedef char __pad_before_u32[4];
470 typedef char __pad_after_u32[0];
471 #else
472 typedef char __pad_before_u32[0];
473 typedef char __pad_after_u32[4];
474 #endif
475
476 /* PCM 2.0.15 API definition had a bug in mmap control; it puts the avail_min
477 * at the wrong offset due to a typo in padding type.
478 * The bug hits only 32bit.
479 * A workaround for incorrect read/write is needed only in 32bit compat mode.
480 */
481 struct __snd_pcm_mmap_control64_buggy {
482 __pad_before_u32 __pad1;
483 __u32 appl_ptr;
484 __pad_before_u32 __pad2; /* SiC! here is the bug */
485 __pad_before_u32 __pad3;
486 __u32 avail_min;
487 __pad_after_uframe __pad4;
488 };
489
snd_pcm_ioctl_sync_ptr_buggy(struct snd_pcm_substream * substream,struct snd_pcm_sync_ptr __user * _sync_ptr)490 static int snd_pcm_ioctl_sync_ptr_buggy(struct snd_pcm_substream *substream,
491 struct snd_pcm_sync_ptr __user *_sync_ptr)
492 {
493 struct snd_pcm_runtime *runtime = substream->runtime;
494 struct snd_pcm_sync_ptr sync_ptr;
495 struct __snd_pcm_mmap_control64_buggy *sync_cp;
496 volatile struct snd_pcm_mmap_status *status;
497 volatile struct snd_pcm_mmap_control *control;
498 int err;
499
500 memset(&sync_ptr, 0, sizeof(sync_ptr));
501 sync_cp = (struct __snd_pcm_mmap_control64_buggy *)&sync_ptr.c.control;
502 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
503 return -EFAULT;
504 if (copy_from_user(sync_cp, &(_sync_ptr->c.control), sizeof(*sync_cp)))
505 return -EFAULT;
506 status = runtime->status;
507 control = runtime->control;
508 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
509 err = snd_pcm_hwsync(substream);
510 if (err < 0)
511 return err;
512 }
513 scoped_guard(pcm_stream_lock_irq, substream) {
514 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) {
515 err = pcm_lib_apply_appl_ptr(substream, sync_cp->appl_ptr);
516 if (err < 0)
517 return err;
518 } else {
519 sync_cp->appl_ptr = control->appl_ptr;
520 }
521 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
522 control->avail_min = sync_cp->avail_min;
523 else
524 sync_cp->avail_min = control->avail_min;
525 sync_ptr.s.status.state = status->state;
526 sync_ptr.s.status.hw_ptr = status->hw_ptr;
527 sync_ptr.s.status.tstamp = status->tstamp;
528 sync_ptr.s.status.suspended_state = status->suspended_state;
529 sync_ptr.s.status.audio_tstamp = status->audio_tstamp;
530 }
531 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
532 snd_pcm_dma_buffer_sync(substream, SNDRV_DMA_SYNC_DEVICE);
533 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
534 return -EFAULT;
535 return 0;
536 }
537
538 /*
539 */
540 enum {
541 SNDRV_PCM_IOCTL_HW_REFINE32 = _IOWR('A', 0x10, struct snd_pcm_hw_params32),
542 SNDRV_PCM_IOCTL_HW_PARAMS32 = _IOWR('A', 0x11, struct snd_pcm_hw_params32),
543 SNDRV_PCM_IOCTL_SW_PARAMS32 = _IOWR('A', 0x13, struct snd_pcm_sw_params32),
544 SNDRV_PCM_IOCTL_STATUS_COMPAT32 = _IOR('A', 0x20, struct snd_pcm_status32),
545 SNDRV_PCM_IOCTL_STATUS_EXT_COMPAT32 = _IOWR('A', 0x24, struct snd_pcm_status32),
546 SNDRV_PCM_IOCTL_DELAY32 = _IOR('A', 0x21, s32),
547 SNDRV_PCM_IOCTL_CHANNEL_INFO32 = _IOR('A', 0x32, struct snd_pcm_channel_info32),
548 SNDRV_PCM_IOCTL_REWIND32 = _IOW('A', 0x46, u32),
549 SNDRV_PCM_IOCTL_FORWARD32 = _IOW('A', 0x49, u32),
550 SNDRV_PCM_IOCTL_WRITEI_FRAMES32 = _IOW('A', 0x50, struct snd_xferi32),
551 SNDRV_PCM_IOCTL_READI_FRAMES32 = _IOR('A', 0x51, struct snd_xferi32),
552 SNDRV_PCM_IOCTL_WRITEN_FRAMES32 = _IOW('A', 0x52, struct snd_xfern32),
553 SNDRV_PCM_IOCTL_READN_FRAMES32 = _IOR('A', 0x53, struct snd_xfern32),
554 SNDRV_PCM_IOCTL_STATUS_COMPAT64 = _IOR('A', 0x20, struct compat_snd_pcm_status64),
555 SNDRV_PCM_IOCTL_STATUS_EXT_COMPAT64 = _IOWR('A', 0x24, struct compat_snd_pcm_status64),
556 #ifdef CONFIG_X86_X32_ABI
557 SNDRV_PCM_IOCTL_CHANNEL_INFO_X32 = _IOR('A', 0x32, struct snd_pcm_channel_info),
558 SNDRV_PCM_IOCTL_SYNC_PTR_X32 = _IOWR('A', 0x23, struct snd_pcm_sync_ptr_x32),
559 #endif /* CONFIG_X86_X32_ABI */
560 };
561
snd_pcm_ioctl_compat(struct file * file,unsigned int cmd,unsigned long arg)562 static long snd_pcm_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
563 {
564 struct snd_pcm_file *pcm_file;
565 struct snd_pcm_substream *substream;
566 void __user *argp = compat_ptr(arg);
567
568 pcm_file = file->private_data;
569 if (! pcm_file)
570 return -ENOTTY;
571 substream = pcm_file->substream;
572 if (! substream)
573 return -ENOTTY;
574
575 /*
576 * When PCM is used on 32bit mode, we need to disable
577 * mmap of the old PCM status/control records because
578 * of the size incompatibility.
579 */
580 pcm_file->no_compat_mmap = 1;
581
582 switch (cmd) {
583 case SNDRV_PCM_IOCTL_PVERSION:
584 case SNDRV_PCM_IOCTL_INFO:
585 case SNDRV_PCM_IOCTL_TSTAMP:
586 case SNDRV_PCM_IOCTL_TTSTAMP:
587 case SNDRV_PCM_IOCTL_USER_PVERSION:
588 case SNDRV_PCM_IOCTL_HWSYNC:
589 case SNDRV_PCM_IOCTL_PREPARE:
590 case SNDRV_PCM_IOCTL_RESET:
591 case SNDRV_PCM_IOCTL_START:
592 case SNDRV_PCM_IOCTL_DROP:
593 case SNDRV_PCM_IOCTL_DRAIN:
594 case SNDRV_PCM_IOCTL_PAUSE:
595 case SNDRV_PCM_IOCTL_HW_FREE:
596 case SNDRV_PCM_IOCTL_RESUME:
597 case SNDRV_PCM_IOCTL_XRUN:
598 case SNDRV_PCM_IOCTL_LINK:
599 case SNDRV_PCM_IOCTL_UNLINK:
600 case __SNDRV_PCM_IOCTL_SYNC_PTR32:
601 return snd_pcm_common_ioctl(file, substream, cmd, argp);
602 case __SNDRV_PCM_IOCTL_SYNC_PTR64:
603 #ifdef CONFIG_X86_X32_ABI
604 if (in_x32_syscall())
605 return snd_pcm_ioctl_sync_ptr_x32(substream, argp);
606 #endif /* CONFIG_X86_X32_ABI */
607 return snd_pcm_ioctl_sync_ptr_buggy(substream, argp);
608 case SNDRV_PCM_IOCTL_HW_REFINE32:
609 return snd_pcm_ioctl_hw_params_compat(substream, 1, argp);
610 case SNDRV_PCM_IOCTL_HW_PARAMS32:
611 return snd_pcm_ioctl_hw_params_compat(substream, 0, argp);
612 case SNDRV_PCM_IOCTL_SW_PARAMS32:
613 return snd_pcm_ioctl_sw_params_compat(substream, argp);
614 case SNDRV_PCM_IOCTL_STATUS_COMPAT32:
615 return snd_pcm_status_user32(substream, argp, false);
616 case SNDRV_PCM_IOCTL_STATUS_EXT_COMPAT32:
617 return snd_pcm_status_user32(substream, argp, true);
618 case SNDRV_PCM_IOCTL_CHANNEL_INFO32:
619 return snd_pcm_ioctl_channel_info_compat(substream, argp);
620 case SNDRV_PCM_IOCTL_WRITEI_FRAMES32:
621 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
622 case SNDRV_PCM_IOCTL_READI_FRAMES32:
623 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
624 case SNDRV_PCM_IOCTL_WRITEN_FRAMES32:
625 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
626 case SNDRV_PCM_IOCTL_READN_FRAMES32:
627 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
628 case SNDRV_PCM_IOCTL_DELAY32:
629 return snd_pcm_ioctl_delay_compat(substream, argp);
630 case SNDRV_PCM_IOCTL_REWIND32:
631 return snd_pcm_ioctl_rewind_compat(substream, argp);
632 case SNDRV_PCM_IOCTL_FORWARD32:
633 return snd_pcm_ioctl_forward_compat(substream, argp);
634 case SNDRV_PCM_IOCTL_STATUS_COMPAT64:
635 return snd_pcm_status_user_compat64(substream, argp, false);
636 case SNDRV_PCM_IOCTL_STATUS_EXT_COMPAT64:
637 return snd_pcm_status_user_compat64(substream, argp, true);
638 #ifdef CONFIG_X86_X32_ABI
639 case SNDRV_PCM_IOCTL_CHANNEL_INFO_X32:
640 return snd_pcm_ioctl_channel_info_x32(substream, argp);
641 #endif /* CONFIG_X86_X32_ABI */
642 }
643
644 return -ENOIOCTLCMD;
645 }
646