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;
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 err = -EFAULT;
253 goto error;
254 }
255
256 if (refine) {
257 err = snd_pcm_hw_refine(substream, data);
258 if (err < 0)
259 goto error;
260 err = fixup_unreferenced_params(substream, data);
261 } else {
262 err = snd_pcm_hw_params(substream, data);
263 }
264 if (err < 0)
265 goto error;
266 if (copy_to_user(data32, data, sizeof(*data32)) ||
267 put_user(data->fifo_size, &data32->fifo_size)) {
268 err = -EFAULT;
269 goto error;
270 }
271
272 if (! refine) {
273 unsigned int new_boundary = recalculate_boundary(runtime);
274 if (new_boundary)
275 runtime->boundary = new_boundary;
276 }
277 error:
278 kfree(data);
279 return err;
280 }
281
282
283 /*
284 */
285 struct snd_xferi32 {
286 s32 result;
287 u32 buf;
288 u32 frames;
289 };
290
snd_pcm_ioctl_xferi_compat(struct snd_pcm_substream * substream,int dir,struct snd_xferi32 __user * data32)291 static int snd_pcm_ioctl_xferi_compat(struct snd_pcm_substream *substream,
292 int dir, struct snd_xferi32 __user *data32)
293 {
294 compat_caddr_t buf;
295 u32 frames;
296 int err;
297
298 if (! substream->runtime)
299 return -ENOTTY;
300 if (substream->stream != dir)
301 return -EINVAL;
302 if (substream->runtime->state == SNDRV_PCM_STATE_OPEN)
303 return -EBADFD;
304
305 if (get_user(buf, &data32->buf) ||
306 get_user(frames, &data32->frames))
307 return -EFAULT;
308
309 if (dir == SNDRV_PCM_STREAM_PLAYBACK)
310 err = snd_pcm_lib_write(substream, compat_ptr(buf), frames);
311 else
312 err = snd_pcm_lib_read(substream, compat_ptr(buf), frames);
313 if (err < 0)
314 return err;
315 /* copy the result */
316 if (put_user(err, &data32->result))
317 return -EFAULT;
318 return 0;
319 }
320
321
322 /* snd_xfern needs remapping of bufs */
323 struct snd_xfern32 {
324 s32 result;
325 u32 bufs; /* this is void **; */
326 u32 frames;
327 };
328
329 /*
330 * xfern ioctl nees to copy (up to) 128 pointers on stack.
331 * although we may pass the copied pointers through f_op->ioctl, but the ioctl
332 * handler there expands again the same 128 pointers on stack, so it is better
333 * to handle the function (calling pcm_readv/writev) directly in this handler.
334 */
snd_pcm_ioctl_xfern_compat(struct snd_pcm_substream * substream,int dir,struct snd_xfern32 __user * data32)335 static int snd_pcm_ioctl_xfern_compat(struct snd_pcm_substream *substream,
336 int dir, struct snd_xfern32 __user *data32)
337 {
338 compat_caddr_t buf;
339 compat_caddr_t __user *bufptr;
340 u32 frames;
341 void __user **bufs;
342 int err, ch, i;
343
344 if (! substream->runtime)
345 return -ENOTTY;
346 if (substream->stream != dir)
347 return -EINVAL;
348 if (substream->runtime->state == SNDRV_PCM_STATE_OPEN)
349 return -EBADFD;
350
351 ch = substream->runtime->channels;
352 if (ch > 128)
353 return -EINVAL;
354 if (get_user(buf, &data32->bufs) ||
355 get_user(frames, &data32->frames))
356 return -EFAULT;
357 bufptr = compat_ptr(buf);
358 bufs = kmalloc_array(ch, sizeof(void __user *), GFP_KERNEL);
359 if (bufs == NULL)
360 return -ENOMEM;
361 for (i = 0; i < ch; i++) {
362 u32 ptr;
363 if (get_user(ptr, bufptr)) {
364 kfree(bufs);
365 return -EFAULT;
366 }
367 bufs[i] = compat_ptr(ptr);
368 bufptr++;
369 }
370 if (dir == SNDRV_PCM_STREAM_PLAYBACK)
371 err = snd_pcm_lib_writev(substream, bufs, frames);
372 else
373 err = snd_pcm_lib_readv(substream, bufs, frames);
374 if (err >= 0) {
375 if (put_user(err, &data32->result))
376 err = -EFAULT;
377 }
378 kfree(bufs);
379 return err;
380 }
381
382 #ifdef CONFIG_X86_X32_ABI
383 /* X32 ABI has 64bit timespec and 64bit alignment */
384 struct snd_pcm_mmap_status_x32 {
385 snd_pcm_state_t state;
386 s32 pad1;
387 u32 hw_ptr;
388 u32 pad2; /* alignment */
389 s64 tstamp_sec;
390 s64 tstamp_nsec;
391 snd_pcm_state_t suspended_state;
392 s32 pad3;
393 s64 audio_tstamp_sec;
394 s64 audio_tstamp_nsec;
395 } __packed;
396
397 struct snd_pcm_mmap_control_x32 {
398 u32 appl_ptr;
399 u32 avail_min;
400 };
401
402 struct snd_pcm_sync_ptr_x32 {
403 u32 flags;
404 u32 rsvd; /* alignment */
405 union {
406 struct snd_pcm_mmap_status_x32 status;
407 unsigned char reserved[64];
408 } s;
409 union {
410 struct snd_pcm_mmap_control_x32 control;
411 unsigned char reserved[64];
412 } c;
413 } __packed;
414
snd_pcm_ioctl_sync_ptr_x32(struct snd_pcm_substream * substream,struct snd_pcm_sync_ptr_x32 __user * src)415 static int snd_pcm_ioctl_sync_ptr_x32(struct snd_pcm_substream *substream,
416 struct snd_pcm_sync_ptr_x32 __user *src)
417 {
418 struct snd_pcm_runtime *runtime = substream->runtime;
419 volatile struct snd_pcm_mmap_status *status;
420 volatile struct snd_pcm_mmap_control *control;
421 u32 sflags;
422 struct snd_pcm_mmap_control scontrol;
423 struct snd_pcm_mmap_status sstatus;
424 snd_pcm_uframes_t boundary;
425 int err;
426
427 if (snd_BUG_ON(!runtime))
428 return -EINVAL;
429
430 if (get_user(sflags, &src->flags) ||
431 get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
432 get_user(scontrol.avail_min, &src->c.control.avail_min))
433 return -EFAULT;
434 if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
435 err = snd_pcm_hwsync(substream);
436 if (err < 0)
437 return err;
438 }
439 status = runtime->status;
440 control = runtime->control;
441 boundary = recalculate_boundary(runtime);
442 if (!boundary)
443 boundary = 0x7fffffff;
444 snd_pcm_stream_lock_irq(substream);
445 /* FIXME: we should consider the boundary for the sync from app */
446 if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
447 control->appl_ptr = scontrol.appl_ptr;
448 else
449 scontrol.appl_ptr = control->appl_ptr % boundary;
450 if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
451 control->avail_min = scontrol.avail_min;
452 else
453 scontrol.avail_min = control->avail_min;
454 sstatus.state = status->state;
455 sstatus.hw_ptr = status->hw_ptr % boundary;
456 sstatus.tstamp = status->tstamp;
457 sstatus.suspended_state = status->suspended_state;
458 sstatus.audio_tstamp = status->audio_tstamp;
459 snd_pcm_stream_unlock_irq(substream);
460 if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
461 snd_pcm_dma_buffer_sync(substream, SNDRV_DMA_SYNC_DEVICE);
462 if (put_user(sstatus.state, &src->s.status.state) ||
463 put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) ||
464 put_user(sstatus.tstamp.tv_sec, &src->s.status.tstamp_sec) ||
465 put_user(sstatus.tstamp.tv_nsec, &src->s.status.tstamp_nsec) ||
466 put_user(sstatus.suspended_state, &src->s.status.suspended_state) ||
467 put_user(sstatus.audio_tstamp.tv_sec, &src->s.status.audio_tstamp_sec) ||
468 put_user(sstatus.audio_tstamp.tv_nsec, &src->s.status.audio_tstamp_nsec) ||
469 put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
470 put_user(scontrol.avail_min, &src->c.control.avail_min))
471 return -EFAULT;
472
473 return 0;
474 }
475 #endif /* CONFIG_X86_X32_ABI */
476
477 #ifdef __BIG_ENDIAN
478 typedef char __pad_before_u32[4];
479 typedef char __pad_after_u32[0];
480 #else
481 typedef char __pad_before_u32[0];
482 typedef char __pad_after_u32[4];
483 #endif
484
485 /* PCM 2.0.15 API definition had a bug in mmap control; it puts the avail_min
486 * at the wrong offset due to a typo in padding type.
487 * The bug hits only 32bit.
488 * A workaround for incorrect read/write is needed only in 32bit compat mode.
489 */
490 struct __snd_pcm_mmap_control64_buggy {
491 __pad_before_u32 __pad1;
492 __u32 appl_ptr;
493 __pad_before_u32 __pad2; /* SiC! here is the bug */
494 __pad_before_u32 __pad3;
495 __u32 avail_min;
496 __pad_after_uframe __pad4;
497 };
498
snd_pcm_ioctl_sync_ptr_buggy(struct snd_pcm_substream * substream,struct snd_pcm_sync_ptr __user * _sync_ptr)499 static int snd_pcm_ioctl_sync_ptr_buggy(struct snd_pcm_substream *substream,
500 struct snd_pcm_sync_ptr __user *_sync_ptr)
501 {
502 struct snd_pcm_runtime *runtime = substream->runtime;
503 struct snd_pcm_sync_ptr sync_ptr;
504 struct __snd_pcm_mmap_control64_buggy *sync_cp;
505 volatile struct snd_pcm_mmap_status *status;
506 volatile struct snd_pcm_mmap_control *control;
507 int err;
508
509 memset(&sync_ptr, 0, sizeof(sync_ptr));
510 sync_cp = (struct __snd_pcm_mmap_control64_buggy *)&sync_ptr.c.control;
511 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
512 return -EFAULT;
513 if (copy_from_user(sync_cp, &(_sync_ptr->c.control), sizeof(*sync_cp)))
514 return -EFAULT;
515 status = runtime->status;
516 control = runtime->control;
517 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
518 err = snd_pcm_hwsync(substream);
519 if (err < 0)
520 return err;
521 }
522 snd_pcm_stream_lock_irq(substream);
523 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) {
524 err = pcm_lib_apply_appl_ptr(substream, sync_cp->appl_ptr);
525 if (err < 0) {
526 snd_pcm_stream_unlock_irq(substream);
527 return err;
528 }
529 } else {
530 sync_cp->appl_ptr = control->appl_ptr;
531 }
532 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
533 control->avail_min = sync_cp->avail_min;
534 else
535 sync_cp->avail_min = control->avail_min;
536 sync_ptr.s.status.state = status->state;
537 sync_ptr.s.status.hw_ptr = status->hw_ptr;
538 sync_ptr.s.status.tstamp = status->tstamp;
539 sync_ptr.s.status.suspended_state = status->suspended_state;
540 sync_ptr.s.status.audio_tstamp = status->audio_tstamp;
541 snd_pcm_stream_unlock_irq(substream);
542 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
543 snd_pcm_dma_buffer_sync(substream, SNDRV_DMA_SYNC_DEVICE);
544 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
545 return -EFAULT;
546 return 0;
547 }
548
549 /*
550 */
551 enum {
552 SNDRV_PCM_IOCTL_HW_REFINE32 = _IOWR('A', 0x10, struct snd_pcm_hw_params32),
553 SNDRV_PCM_IOCTL_HW_PARAMS32 = _IOWR('A', 0x11, struct snd_pcm_hw_params32),
554 SNDRV_PCM_IOCTL_SW_PARAMS32 = _IOWR('A', 0x13, struct snd_pcm_sw_params32),
555 SNDRV_PCM_IOCTL_STATUS_COMPAT32 = _IOR('A', 0x20, struct snd_pcm_status32),
556 SNDRV_PCM_IOCTL_STATUS_EXT_COMPAT32 = _IOWR('A', 0x24, struct snd_pcm_status32),
557 SNDRV_PCM_IOCTL_DELAY32 = _IOR('A', 0x21, s32),
558 SNDRV_PCM_IOCTL_CHANNEL_INFO32 = _IOR('A', 0x32, struct snd_pcm_channel_info32),
559 SNDRV_PCM_IOCTL_REWIND32 = _IOW('A', 0x46, u32),
560 SNDRV_PCM_IOCTL_FORWARD32 = _IOW('A', 0x49, u32),
561 SNDRV_PCM_IOCTL_WRITEI_FRAMES32 = _IOW('A', 0x50, struct snd_xferi32),
562 SNDRV_PCM_IOCTL_READI_FRAMES32 = _IOR('A', 0x51, struct snd_xferi32),
563 SNDRV_PCM_IOCTL_WRITEN_FRAMES32 = _IOW('A', 0x52, struct snd_xfern32),
564 SNDRV_PCM_IOCTL_READN_FRAMES32 = _IOR('A', 0x53, struct snd_xfern32),
565 SNDRV_PCM_IOCTL_STATUS_COMPAT64 = _IOR('A', 0x20, struct compat_snd_pcm_status64),
566 SNDRV_PCM_IOCTL_STATUS_EXT_COMPAT64 = _IOWR('A', 0x24, struct compat_snd_pcm_status64),
567 #ifdef CONFIG_X86_X32_ABI
568 SNDRV_PCM_IOCTL_CHANNEL_INFO_X32 = _IOR('A', 0x32, struct snd_pcm_channel_info),
569 SNDRV_PCM_IOCTL_SYNC_PTR_X32 = _IOWR('A', 0x23, struct snd_pcm_sync_ptr_x32),
570 #endif /* CONFIG_X86_X32_ABI */
571 };
572
snd_pcm_ioctl_compat(struct file * file,unsigned int cmd,unsigned long arg)573 static long snd_pcm_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
574 {
575 struct snd_pcm_file *pcm_file;
576 struct snd_pcm_substream *substream;
577 void __user *argp = compat_ptr(arg);
578
579 pcm_file = file->private_data;
580 if (! pcm_file)
581 return -ENOTTY;
582 substream = pcm_file->substream;
583 if (! substream)
584 return -ENOTTY;
585
586 /*
587 * When PCM is used on 32bit mode, we need to disable
588 * mmap of the old PCM status/control records because
589 * of the size incompatibility.
590 */
591 pcm_file->no_compat_mmap = 1;
592
593 switch (cmd) {
594 case SNDRV_PCM_IOCTL_PVERSION:
595 case SNDRV_PCM_IOCTL_INFO:
596 case SNDRV_PCM_IOCTL_TSTAMP:
597 case SNDRV_PCM_IOCTL_TTSTAMP:
598 case SNDRV_PCM_IOCTL_USER_PVERSION:
599 case SNDRV_PCM_IOCTL_HWSYNC:
600 case SNDRV_PCM_IOCTL_PREPARE:
601 case SNDRV_PCM_IOCTL_RESET:
602 case SNDRV_PCM_IOCTL_START:
603 case SNDRV_PCM_IOCTL_DROP:
604 case SNDRV_PCM_IOCTL_DRAIN:
605 case SNDRV_PCM_IOCTL_PAUSE:
606 case SNDRV_PCM_IOCTL_HW_FREE:
607 case SNDRV_PCM_IOCTL_RESUME:
608 case SNDRV_PCM_IOCTL_XRUN:
609 case SNDRV_PCM_IOCTL_LINK:
610 case SNDRV_PCM_IOCTL_UNLINK:
611 case __SNDRV_PCM_IOCTL_SYNC_PTR32:
612 return snd_pcm_common_ioctl(file, substream, cmd, argp);
613 case __SNDRV_PCM_IOCTL_SYNC_PTR64:
614 #ifdef CONFIG_X86_X32_ABI
615 if (in_x32_syscall())
616 return snd_pcm_ioctl_sync_ptr_x32(substream, argp);
617 #endif /* CONFIG_X86_X32_ABI */
618 return snd_pcm_ioctl_sync_ptr_buggy(substream, argp);
619 case SNDRV_PCM_IOCTL_HW_REFINE32:
620 return snd_pcm_ioctl_hw_params_compat(substream, 1, argp);
621 case SNDRV_PCM_IOCTL_HW_PARAMS32:
622 return snd_pcm_ioctl_hw_params_compat(substream, 0, argp);
623 case SNDRV_PCM_IOCTL_SW_PARAMS32:
624 return snd_pcm_ioctl_sw_params_compat(substream, argp);
625 case SNDRV_PCM_IOCTL_STATUS_COMPAT32:
626 return snd_pcm_status_user32(substream, argp, false);
627 case SNDRV_PCM_IOCTL_STATUS_EXT_COMPAT32:
628 return snd_pcm_status_user32(substream, argp, true);
629 case SNDRV_PCM_IOCTL_CHANNEL_INFO32:
630 return snd_pcm_ioctl_channel_info_compat(substream, argp);
631 case SNDRV_PCM_IOCTL_WRITEI_FRAMES32:
632 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
633 case SNDRV_PCM_IOCTL_READI_FRAMES32:
634 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
635 case SNDRV_PCM_IOCTL_WRITEN_FRAMES32:
636 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
637 case SNDRV_PCM_IOCTL_READN_FRAMES32:
638 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
639 case SNDRV_PCM_IOCTL_DELAY32:
640 return snd_pcm_ioctl_delay_compat(substream, argp);
641 case SNDRV_PCM_IOCTL_REWIND32:
642 return snd_pcm_ioctl_rewind_compat(substream, argp);
643 case SNDRV_PCM_IOCTL_FORWARD32:
644 return snd_pcm_ioctl_forward_compat(substream, argp);
645 case SNDRV_PCM_IOCTL_STATUS_COMPAT64:
646 return snd_pcm_status_user_compat64(substream, argp, false);
647 case SNDRV_PCM_IOCTL_STATUS_EXT_COMPAT64:
648 return snd_pcm_status_user_compat64(substream, argp, true);
649 #ifdef CONFIG_X86_X32_ABI
650 case SNDRV_PCM_IOCTL_CHANNEL_INFO_X32:
651 return snd_pcm_ioctl_channel_info_x32(substream, argp);
652 #endif /* CONFIG_X86_X32_ABI */
653 }
654
655 return -ENOIOCTLCMD;
656 }
657