Loading...
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
26static int snd_pcm_ioctl_delay_compat(struct snd_pcm_substream *substream,
27 s32 __user *src)
28{
29 snd_pcm_sframes_t delay;
30 int err;
31
32 err = snd_pcm_delay(substream, &delay);
33 if (err)
34 return err;
35 if (put_user(delay, src))
36 return -EFAULT;
37 return 0;
38}
39
40static int snd_pcm_ioctl_rewind_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 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
49 err = snd_pcm_playback_rewind(substream, frames);
50 else
51 err = snd_pcm_capture_rewind(substream, frames);
52 if (put_user(err, src))
53 return -EFAULT;
54 return err < 0 ? err : 0;
55}
56
57static int snd_pcm_ioctl_forward_compat(struct snd_pcm_substream *substream,
58 u32 __user *src)
59{
60 snd_pcm_uframes_t frames;
61 int err;
62
63 if (get_user(frames, src))
64 return -EFAULT;
65 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
66 err = snd_pcm_playback_forward(substream, frames);
67 else
68 err = snd_pcm_capture_forward(substream, frames);
69 if (put_user(err, src))
70 return -EFAULT;
71 return err < 0 ? err : 0;
72}
73
74struct snd_pcm_hw_params32 {
75 u32 flags;
76 struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; /* this must be identical */
77 struct snd_mask mres[5]; /* reserved masks */
78 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
79 struct snd_interval ires[9]; /* reserved intervals */
80 u32 rmask;
81 u32 cmask;
82 u32 info;
83 u32 msbits;
84 u32 rate_num;
85 u32 rate_den;
86 u32 fifo_size;
87 unsigned char reserved[64];
88};
89
90struct snd_pcm_sw_params32 {
91 s32 tstamp_mode;
92 u32 period_step;
93 u32 sleep_min;
94 u32 avail_min;
95 u32 xfer_align;
96 u32 start_threshold;
97 u32 stop_threshold;
98 u32 silence_threshold;
99 u32 silence_size;
100 u32 boundary;
101 u32 proto;
102 u32 tstamp_type;
103 unsigned char reserved[56];
104};
105
106/* recalcuate the boundary within 32bit */
107static snd_pcm_uframes_t recalculate_boundary(struct snd_pcm_runtime *runtime)
108{
109 snd_pcm_uframes_t boundary;
110
111 if (! runtime->buffer_size)
112 return 0;
113 boundary = runtime->buffer_size;
114 while (boundary * 2 <= 0x7fffffffUL - runtime->buffer_size)
115 boundary *= 2;
116 return boundary;
117}
118
119static int snd_pcm_ioctl_sw_params_compat(struct snd_pcm_substream *substream,
120 struct snd_pcm_sw_params32 __user *src)
121{
122 struct snd_pcm_sw_params params;
123 snd_pcm_uframes_t boundary;
124 int err;
125
126 memset(¶ms, 0, sizeof(params));
127 if (get_user(params.tstamp_mode, &src->tstamp_mode) ||
128 get_user(params.period_step, &src->period_step) ||
129 get_user(params.sleep_min, &src->sleep_min) ||
130 get_user(params.avail_min, &src->avail_min) ||
131 get_user(params.xfer_align, &src->xfer_align) ||
132 get_user(params.start_threshold, &src->start_threshold) ||
133 get_user(params.stop_threshold, &src->stop_threshold) ||
134 get_user(params.silence_threshold, &src->silence_threshold) ||
135 get_user(params.silence_size, &src->silence_size) ||
136 get_user(params.tstamp_type, &src->tstamp_type) ||
137 get_user(params.proto, &src->proto))
138 return -EFAULT;
139 /*
140 * Check silent_size parameter. Since we have 64bit boundary,
141 * silence_size must be compared with the 32bit boundary.
142 */
143 boundary = recalculate_boundary(substream->runtime);
144 if (boundary && params.silence_size >= boundary)
145 params.silence_size = substream->runtime->boundary;
146 err = snd_pcm_sw_params(substream, ¶ms);
147 if (err < 0)
148 return err;
149 if (boundary && put_user(boundary, &src->boundary))
150 return -EFAULT;
151 return err;
152}
153
154struct snd_pcm_channel_info32 {
155 u32 channel;
156 u32 offset;
157 u32 first;
158 u32 step;
159};
160
161static int snd_pcm_ioctl_channel_info_compat(struct snd_pcm_substream *substream,
162 struct snd_pcm_channel_info32 __user *src)
163{
164 struct snd_pcm_channel_info info;
165 int err;
166
167 if (get_user(info.channel, &src->channel) ||
168 get_user(info.offset, &src->offset) ||
169 get_user(info.first, &src->first) ||
170 get_user(info.step, &src->step))
171 return -EFAULT;
172 err = snd_pcm_channel_info(substream, &info);
173 if (err < 0)
174 return err;
175 if (put_user(info.channel, &src->channel) ||
176 put_user(info.offset, &src->offset) ||
177 put_user(info.first, &src->first) ||
178 put_user(info.step, &src->step))
179 return -EFAULT;
180 return err;
181}
182
183#ifdef CONFIG_X86_X32
184/* X32 ABI has the same struct as x86-64 for snd_pcm_channel_info */
185static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
186 struct snd_pcm_channel_info __user *src);
187#define snd_pcm_ioctl_channel_info_x32(s, p) \
188 snd_pcm_channel_info_user(s, p)
189#endif /* CONFIG_X86_X32 */
190
191struct snd_pcm_status32 {
192 s32 state;
193 struct compat_timespec trigger_tstamp;
194 struct compat_timespec tstamp;
195 u32 appl_ptr;
196 u32 hw_ptr;
197 s32 delay;
198 u32 avail;
199 u32 avail_max;
200 u32 overrange;
201 s32 suspended_state;
202 u32 audio_tstamp_data;
203 struct compat_timespec audio_tstamp;
204 struct compat_timespec driver_tstamp;
205 u32 audio_tstamp_accuracy;
206 unsigned char reserved[52-2*sizeof(struct compat_timespec)];
207} __attribute__((packed));
208
209
210static int snd_pcm_status_user_compat(struct snd_pcm_substream *substream,
211 struct snd_pcm_status32 __user *src,
212 bool ext)
213{
214 struct snd_pcm_status status;
215 int err;
216
217 memset(&status, 0, sizeof(status));
218 /*
219 * with extension, parameters are read/write,
220 * get audio_tstamp_data from user,
221 * ignore rest of status structure
222 */
223 if (ext && get_user(status.audio_tstamp_data,
224 (u32 __user *)(&src->audio_tstamp_data)))
225 return -EFAULT;
226 err = snd_pcm_status(substream, &status);
227 if (err < 0)
228 return err;
229
230 if (clear_user(src, sizeof(*src)))
231 return -EFAULT;
232 if (put_user(status.state, &src->state) ||
233 compat_put_timespec(&status.trigger_tstamp, &src->trigger_tstamp) ||
234 compat_put_timespec(&status.tstamp, &src->tstamp) ||
235 put_user(status.appl_ptr, &src->appl_ptr) ||
236 put_user(status.hw_ptr, &src->hw_ptr) ||
237 put_user(status.delay, &src->delay) ||
238 put_user(status.avail, &src->avail) ||
239 put_user(status.avail_max, &src->avail_max) ||
240 put_user(status.overrange, &src->overrange) ||
241 put_user(status.suspended_state, &src->suspended_state) ||
242 put_user(status.audio_tstamp_data, &src->audio_tstamp_data) ||
243 compat_put_timespec(&status.audio_tstamp, &src->audio_tstamp) ||
244 compat_put_timespec(&status.driver_tstamp, &src->driver_tstamp) ||
245 put_user(status.audio_tstamp_accuracy, &src->audio_tstamp_accuracy))
246 return -EFAULT;
247
248 return err;
249}
250
251#ifdef CONFIG_X86_X32
252/* X32 ABI has 64bit timespec and 64bit alignment */
253struct snd_pcm_status_x32 {
254 s32 state;
255 u32 rsvd; /* alignment */
256 struct timespec trigger_tstamp;
257 struct timespec tstamp;
258 u32 appl_ptr;
259 u32 hw_ptr;
260 s32 delay;
261 u32 avail;
262 u32 avail_max;
263 u32 overrange;
264 s32 suspended_state;
265 u32 audio_tstamp_data;
266 struct timespec audio_tstamp;
267 struct timespec driver_tstamp;
268 u32 audio_tstamp_accuracy;
269 unsigned char reserved[52-2*sizeof(struct timespec)];
270} __packed;
271
272#define put_timespec(src, dst) copy_to_user(dst, src, sizeof(*dst))
273
274static int snd_pcm_status_user_x32(struct snd_pcm_substream *substream,
275 struct snd_pcm_status_x32 __user *src,
276 bool ext)
277{
278 struct snd_pcm_status status;
279 int err;
280
281 memset(&status, 0, sizeof(status));
282 /*
283 * with extension, parameters are read/write,
284 * get audio_tstamp_data from user,
285 * ignore rest of status structure
286 */
287 if (ext && get_user(status.audio_tstamp_data,
288 (u32 __user *)(&src->audio_tstamp_data)))
289 return -EFAULT;
290 err = snd_pcm_status(substream, &status);
291 if (err < 0)
292 return err;
293
294 if (clear_user(src, sizeof(*src)))
295 return -EFAULT;
296 if (put_user(status.state, &src->state) ||
297 put_timespec(&status.trigger_tstamp, &src->trigger_tstamp) ||
298 put_timespec(&status.tstamp, &src->tstamp) ||
299 put_user(status.appl_ptr, &src->appl_ptr) ||
300 put_user(status.hw_ptr, &src->hw_ptr) ||
301 put_user(status.delay, &src->delay) ||
302 put_user(status.avail, &src->avail) ||
303 put_user(status.avail_max, &src->avail_max) ||
304 put_user(status.overrange, &src->overrange) ||
305 put_user(status.suspended_state, &src->suspended_state) ||
306 put_user(status.audio_tstamp_data, &src->audio_tstamp_data) ||
307 put_timespec(&status.audio_tstamp, &src->audio_tstamp) ||
308 put_timespec(&status.driver_tstamp, &src->driver_tstamp) ||
309 put_user(status.audio_tstamp_accuracy, &src->audio_tstamp_accuracy))
310 return -EFAULT;
311
312 return err;
313}
314#endif /* CONFIG_X86_X32 */
315
316/* both for HW_PARAMS and HW_REFINE */
317static int snd_pcm_ioctl_hw_params_compat(struct snd_pcm_substream *substream,
318 int refine,
319 struct snd_pcm_hw_params32 __user *data32)
320{
321 struct snd_pcm_hw_params *data;
322 struct snd_pcm_runtime *runtime;
323 int err;
324
325 if (! (runtime = substream->runtime))
326 return -ENOTTY;
327
328 data = kmalloc(sizeof(*data), GFP_KERNEL);
329 if (!data)
330 return -ENOMEM;
331
332 /* only fifo_size (RO from userspace) is different, so just copy all */
333 if (copy_from_user(data, data32, sizeof(*data32))) {
334 err = -EFAULT;
335 goto error;
336 }
337
338 if (refine)
339 err = snd_pcm_hw_refine(substream, data);
340 else
341 err = snd_pcm_hw_params(substream, data);
342 if (err < 0)
343 goto error;
344 if (copy_to_user(data32, data, sizeof(*data32)) ||
345 put_user(data->fifo_size, &data32->fifo_size)) {
346 err = -EFAULT;
347 goto error;
348 }
349
350 if (! refine) {
351 unsigned int new_boundary = recalculate_boundary(runtime);
352 if (new_boundary)
353 runtime->boundary = new_boundary;
354 }
355 error:
356 kfree(data);
357 return err;
358}
359
360
361/*
362 */
363struct snd_xferi32 {
364 s32 result;
365 u32 buf;
366 u32 frames;
367};
368
369static int snd_pcm_ioctl_xferi_compat(struct snd_pcm_substream *substream,
370 int dir, struct snd_xferi32 __user *data32)
371{
372 compat_caddr_t buf;
373 u32 frames;
374 int err;
375
376 if (! substream->runtime)
377 return -ENOTTY;
378 if (substream->stream != dir)
379 return -EINVAL;
380 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN)
381 return -EBADFD;
382
383 if (get_user(buf, &data32->buf) ||
384 get_user(frames, &data32->frames))
385 return -EFAULT;
386
387 if (dir == SNDRV_PCM_STREAM_PLAYBACK)
388 err = snd_pcm_lib_write(substream, compat_ptr(buf), frames);
389 else
390 err = snd_pcm_lib_read(substream, compat_ptr(buf), frames);
391 if (err < 0)
392 return err;
393 /* copy the result */
394 if (put_user(err, &data32->result))
395 return -EFAULT;
396 return 0;
397}
398
399
400/* snd_xfern needs remapping of bufs */
401struct snd_xfern32 {
402 s32 result;
403 u32 bufs; /* this is void **; */
404 u32 frames;
405};
406
407/*
408 * xfern ioctl nees to copy (up to) 128 pointers on stack.
409 * although we may pass the copied pointers through f_op->ioctl, but the ioctl
410 * handler there expands again the same 128 pointers on stack, so it is better
411 * to handle the function (calling pcm_readv/writev) directly in this handler.
412 */
413static int snd_pcm_ioctl_xfern_compat(struct snd_pcm_substream *substream,
414 int dir, struct snd_xfern32 __user *data32)
415{
416 compat_caddr_t buf;
417 compat_caddr_t __user *bufptr;
418 u32 frames;
419 void __user **bufs;
420 int err, ch, i;
421
422 if (! substream->runtime)
423 return -ENOTTY;
424 if (substream->stream != dir)
425 return -EINVAL;
426 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN)
427 return -EBADFD;
428
429 if ((ch = substream->runtime->channels) > 128)
430 return -EINVAL;
431 if (get_user(buf, &data32->bufs) ||
432 get_user(frames, &data32->frames))
433 return -EFAULT;
434 bufptr = compat_ptr(buf);
435 bufs = kmalloc(sizeof(void __user *) * ch, GFP_KERNEL);
436 if (bufs == NULL)
437 return -ENOMEM;
438 for (i = 0; i < ch; i++) {
439 u32 ptr;
440 if (get_user(ptr, bufptr)) {
441 kfree(bufs);
442 return -EFAULT;
443 }
444 bufs[i] = compat_ptr(ptr);
445 bufptr++;
446 }
447 if (dir == SNDRV_PCM_STREAM_PLAYBACK)
448 err = snd_pcm_lib_writev(substream, bufs, frames);
449 else
450 err = snd_pcm_lib_readv(substream, bufs, frames);
451 if (err >= 0) {
452 if (put_user(err, &data32->result))
453 err = -EFAULT;
454 }
455 kfree(bufs);
456 return err;
457}
458
459
460struct snd_pcm_mmap_status32 {
461 s32 state;
462 s32 pad1;
463 u32 hw_ptr;
464 struct compat_timespec tstamp;
465 s32 suspended_state;
466 struct compat_timespec audio_tstamp;
467} __attribute__((packed));
468
469struct snd_pcm_mmap_control32 {
470 u32 appl_ptr;
471 u32 avail_min;
472};
473
474struct snd_pcm_sync_ptr32 {
475 u32 flags;
476 union {
477 struct snd_pcm_mmap_status32 status;
478 unsigned char reserved[64];
479 } s;
480 union {
481 struct snd_pcm_mmap_control32 control;
482 unsigned char reserved[64];
483 } c;
484} __attribute__((packed));
485
486static int snd_pcm_ioctl_sync_ptr_compat(struct snd_pcm_substream *substream,
487 struct snd_pcm_sync_ptr32 __user *src)
488{
489 struct snd_pcm_runtime *runtime = substream->runtime;
490 volatile struct snd_pcm_mmap_status *status;
491 volatile struct snd_pcm_mmap_control *control;
492 u32 sflags;
493 struct snd_pcm_mmap_control scontrol;
494 struct snd_pcm_mmap_status sstatus;
495 snd_pcm_uframes_t boundary;
496 int err;
497
498 if (snd_BUG_ON(!runtime))
499 return -EINVAL;
500
501 if (get_user(sflags, &src->flags) ||
502 get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
503 get_user(scontrol.avail_min, &src->c.control.avail_min))
504 return -EFAULT;
505 if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
506 err = snd_pcm_hwsync(substream);
507 if (err < 0)
508 return err;
509 }
510 status = runtime->status;
511 control = runtime->control;
512 boundary = recalculate_boundary(runtime);
513 if (! boundary)
514 boundary = 0x7fffffff;
515 snd_pcm_stream_lock_irq(substream);
516 /* FIXME: we should consider the boundary for the sync from app */
517 if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
518 control->appl_ptr = scontrol.appl_ptr;
519 else
520 scontrol.appl_ptr = control->appl_ptr % boundary;
521 if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
522 control->avail_min = scontrol.avail_min;
523 else
524 scontrol.avail_min = control->avail_min;
525 sstatus.state = status->state;
526 sstatus.hw_ptr = status->hw_ptr % boundary;
527 sstatus.tstamp = status->tstamp;
528 sstatus.suspended_state = status->suspended_state;
529 sstatus.audio_tstamp = status->audio_tstamp;
530 snd_pcm_stream_unlock_irq(substream);
531 if (put_user(sstatus.state, &src->s.status.state) ||
532 put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) ||
533 compat_put_timespec(&sstatus.tstamp, &src->s.status.tstamp) ||
534 put_user(sstatus.suspended_state, &src->s.status.suspended_state) ||
535 compat_put_timespec(&sstatus.audio_tstamp,
536 &src->s.status.audio_tstamp) ||
537 put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
538 put_user(scontrol.avail_min, &src->c.control.avail_min))
539 return -EFAULT;
540
541 return 0;
542}
543
544#ifdef CONFIG_X86_X32
545/* X32 ABI has 64bit timespec and 64bit alignment */
546struct snd_pcm_mmap_status_x32 {
547 s32 state;
548 s32 pad1;
549 u32 hw_ptr;
550 u32 pad2; /* alignment */
551 struct timespec tstamp;
552 s32 suspended_state;
553 s32 pad3;
554 struct timespec audio_tstamp;
555} __packed;
556
557struct snd_pcm_mmap_control_x32 {
558 u32 appl_ptr;
559 u32 avail_min;
560};
561
562struct snd_pcm_sync_ptr_x32 {
563 u32 flags;
564 u32 rsvd; /* alignment */
565 union {
566 struct snd_pcm_mmap_status_x32 status;
567 unsigned char reserved[64];
568 } s;
569 union {
570 struct snd_pcm_mmap_control_x32 control;
571 unsigned char reserved[64];
572 } c;
573} __packed;
574
575static int snd_pcm_ioctl_sync_ptr_x32(struct snd_pcm_substream *substream,
576 struct snd_pcm_sync_ptr_x32 __user *src)
577{
578 struct snd_pcm_runtime *runtime = substream->runtime;
579 volatile struct snd_pcm_mmap_status *status;
580 volatile struct snd_pcm_mmap_control *control;
581 u32 sflags;
582 struct snd_pcm_mmap_control scontrol;
583 struct snd_pcm_mmap_status sstatus;
584 snd_pcm_uframes_t boundary;
585 int err;
586
587 if (snd_BUG_ON(!runtime))
588 return -EINVAL;
589
590 if (get_user(sflags, &src->flags) ||
591 get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
592 get_user(scontrol.avail_min, &src->c.control.avail_min))
593 return -EFAULT;
594 if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
595 err = snd_pcm_hwsync(substream);
596 if (err < 0)
597 return err;
598 }
599 status = runtime->status;
600 control = runtime->control;
601 boundary = recalculate_boundary(runtime);
602 if (!boundary)
603 boundary = 0x7fffffff;
604 snd_pcm_stream_lock_irq(substream);
605 /* FIXME: we should consider the boundary for the sync from app */
606 if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
607 control->appl_ptr = scontrol.appl_ptr;
608 else
609 scontrol.appl_ptr = control->appl_ptr % boundary;
610 if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
611 control->avail_min = scontrol.avail_min;
612 else
613 scontrol.avail_min = control->avail_min;
614 sstatus.state = status->state;
615 sstatus.hw_ptr = status->hw_ptr % boundary;
616 sstatus.tstamp = status->tstamp;
617 sstatus.suspended_state = status->suspended_state;
618 sstatus.audio_tstamp = status->audio_tstamp;
619 snd_pcm_stream_unlock_irq(substream);
620 if (put_user(sstatus.state, &src->s.status.state) ||
621 put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) ||
622 put_timespec(&sstatus.tstamp, &src->s.status.tstamp) ||
623 put_user(sstatus.suspended_state, &src->s.status.suspended_state) ||
624 put_timespec(&sstatus.audio_tstamp, &src->s.status.audio_tstamp) ||
625 put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
626 put_user(scontrol.avail_min, &src->c.control.avail_min))
627 return -EFAULT;
628
629 return 0;
630}
631#endif /* CONFIG_X86_X32 */
632
633/*
634 */
635enum {
636 SNDRV_PCM_IOCTL_HW_REFINE32 = _IOWR('A', 0x10, struct snd_pcm_hw_params32),
637 SNDRV_PCM_IOCTL_HW_PARAMS32 = _IOWR('A', 0x11, struct snd_pcm_hw_params32),
638 SNDRV_PCM_IOCTL_SW_PARAMS32 = _IOWR('A', 0x13, struct snd_pcm_sw_params32),
639 SNDRV_PCM_IOCTL_STATUS32 = _IOR('A', 0x20, struct snd_pcm_status32),
640 SNDRV_PCM_IOCTL_STATUS_EXT32 = _IOWR('A', 0x24, struct snd_pcm_status32),
641 SNDRV_PCM_IOCTL_DELAY32 = _IOR('A', 0x21, s32),
642 SNDRV_PCM_IOCTL_CHANNEL_INFO32 = _IOR('A', 0x32, struct snd_pcm_channel_info32),
643 SNDRV_PCM_IOCTL_REWIND32 = _IOW('A', 0x46, u32),
644 SNDRV_PCM_IOCTL_FORWARD32 = _IOW('A', 0x49, u32),
645 SNDRV_PCM_IOCTL_WRITEI_FRAMES32 = _IOW('A', 0x50, struct snd_xferi32),
646 SNDRV_PCM_IOCTL_READI_FRAMES32 = _IOR('A', 0x51, struct snd_xferi32),
647 SNDRV_PCM_IOCTL_WRITEN_FRAMES32 = _IOW('A', 0x52, struct snd_xfern32),
648 SNDRV_PCM_IOCTL_READN_FRAMES32 = _IOR('A', 0x53, struct snd_xfern32),
649 SNDRV_PCM_IOCTL_SYNC_PTR32 = _IOWR('A', 0x23, struct snd_pcm_sync_ptr32),
650#ifdef CONFIG_X86_X32
651 SNDRV_PCM_IOCTL_CHANNEL_INFO_X32 = _IOR('A', 0x32, struct snd_pcm_channel_info),
652 SNDRV_PCM_IOCTL_STATUS_X32 = _IOR('A', 0x20, struct snd_pcm_status_x32),
653 SNDRV_PCM_IOCTL_STATUS_EXT_X32 = _IOWR('A', 0x24, struct snd_pcm_status_x32),
654 SNDRV_PCM_IOCTL_SYNC_PTR_X32 = _IOWR('A', 0x23, struct snd_pcm_sync_ptr_x32),
655#endif /* CONFIG_X86_X32 */
656};
657
658static long snd_pcm_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
659{
660 struct snd_pcm_file *pcm_file;
661 struct snd_pcm_substream *substream;
662 void __user *argp = compat_ptr(arg);
663
664 pcm_file = file->private_data;
665 if (! pcm_file)
666 return -ENOTTY;
667 substream = pcm_file->substream;
668 if (! substream)
669 return -ENOTTY;
670
671 /*
672 * When PCM is used on 32bit mode, we need to disable
673 * mmap of PCM status/control records because of the size
674 * incompatibility.
675 */
676 pcm_file->no_compat_mmap = 1;
677
678 switch (cmd) {
679 case SNDRV_PCM_IOCTL_PVERSION:
680 case SNDRV_PCM_IOCTL_INFO:
681 case SNDRV_PCM_IOCTL_TSTAMP:
682 case SNDRV_PCM_IOCTL_TTSTAMP:
683 case SNDRV_PCM_IOCTL_USER_PVERSION:
684 case SNDRV_PCM_IOCTL_HWSYNC:
685 case SNDRV_PCM_IOCTL_PREPARE:
686 case SNDRV_PCM_IOCTL_RESET:
687 case SNDRV_PCM_IOCTL_START:
688 case SNDRV_PCM_IOCTL_DROP:
689 case SNDRV_PCM_IOCTL_DRAIN:
690 case SNDRV_PCM_IOCTL_PAUSE:
691 case SNDRV_PCM_IOCTL_HW_FREE:
692 case SNDRV_PCM_IOCTL_RESUME:
693 case SNDRV_PCM_IOCTL_XRUN:
694 case SNDRV_PCM_IOCTL_LINK:
695 case SNDRV_PCM_IOCTL_UNLINK:
696 return snd_pcm_common_ioctl(file, substream, cmd, argp);
697 case SNDRV_PCM_IOCTL_HW_REFINE32:
698 return snd_pcm_ioctl_hw_params_compat(substream, 1, argp);
699 case SNDRV_PCM_IOCTL_HW_PARAMS32:
700 return snd_pcm_ioctl_hw_params_compat(substream, 0, argp);
701 case SNDRV_PCM_IOCTL_SW_PARAMS32:
702 return snd_pcm_ioctl_sw_params_compat(substream, argp);
703 case SNDRV_PCM_IOCTL_STATUS32:
704 return snd_pcm_status_user_compat(substream, argp, false);
705 case SNDRV_PCM_IOCTL_STATUS_EXT32:
706 return snd_pcm_status_user_compat(substream, argp, true);
707 case SNDRV_PCM_IOCTL_SYNC_PTR32:
708 return snd_pcm_ioctl_sync_ptr_compat(substream, argp);
709 case SNDRV_PCM_IOCTL_CHANNEL_INFO32:
710 return snd_pcm_ioctl_channel_info_compat(substream, argp);
711 case SNDRV_PCM_IOCTL_WRITEI_FRAMES32:
712 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
713 case SNDRV_PCM_IOCTL_READI_FRAMES32:
714 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
715 case SNDRV_PCM_IOCTL_WRITEN_FRAMES32:
716 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
717 case SNDRV_PCM_IOCTL_READN_FRAMES32:
718 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
719 case SNDRV_PCM_IOCTL_DELAY32:
720 return snd_pcm_ioctl_delay_compat(substream, argp);
721 case SNDRV_PCM_IOCTL_REWIND32:
722 return snd_pcm_ioctl_rewind_compat(substream, argp);
723 case SNDRV_PCM_IOCTL_FORWARD32:
724 return snd_pcm_ioctl_forward_compat(substream, argp);
725#ifdef CONFIG_X86_X32
726 case SNDRV_PCM_IOCTL_STATUS_X32:
727 return snd_pcm_status_user_x32(substream, argp, false);
728 case SNDRV_PCM_IOCTL_STATUS_EXT_X32:
729 return snd_pcm_status_user_x32(substream, argp, true);
730 case SNDRV_PCM_IOCTL_SYNC_PTR_X32:
731 return snd_pcm_ioctl_sync_ptr_x32(substream, argp);
732 case SNDRV_PCM_IOCTL_CHANNEL_INFO_X32:
733 return snd_pcm_ioctl_channel_info_x32(substream, argp);
734#endif /* CONFIG_X86_X32 */
735 }
736
737 return -ENOIOCTLCMD;
738}
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
12static 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
26static 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
40static 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
54struct 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
70struct 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
86static 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
121struct snd_pcm_channel_info32 {
122 u32 channel;
123 u32 offset;
124 u32 first;
125 u32 step;
126};
127
128static 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 */
152static 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
158struct 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
181static 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 */
234static 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 */
280struct snd_xferi32 {
281 s32 result;
282 u32 buf;
283 u32 frames;
284};
285
286static 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 */
318struct 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 */
330static 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 */
378struct 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
391struct snd_pcm_mmap_control_x32 {
392 u32 appl_ptr;
393 u32 avail_min;
394};
395
396struct 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
409static 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 */
471enum {
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
493static 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}