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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
86/* recalcuate the boundary within 32bit */
87static snd_pcm_uframes_t recalculate_boundary(struct snd_pcm_runtime *runtime)
88{
89 snd_pcm_uframes_t boundary;
90
91 if (! runtime->buffer_size)
92 return 0;
93 boundary = runtime->buffer_size;
94 while (boundary * 2 <= 0x7fffffffUL - runtime->buffer_size)
95 boundary *= 2;
96 return boundary;
97}
98
99static int snd_pcm_ioctl_sw_params_compat(struct snd_pcm_substream *substream,
100 struct snd_pcm_sw_params32 __user *src)
101{
102 struct snd_pcm_sw_params params;
103 snd_pcm_uframes_t boundary;
104 int err;
105
106 memset(¶ms, 0, sizeof(params));
107 if (get_user(params.tstamp_mode, &src->tstamp_mode) ||
108 get_user(params.period_step, &src->period_step) ||
109 get_user(params.sleep_min, &src->sleep_min) ||
110 get_user(params.avail_min, &src->avail_min) ||
111 get_user(params.xfer_align, &src->xfer_align) ||
112 get_user(params.start_threshold, &src->start_threshold) ||
113 get_user(params.stop_threshold, &src->stop_threshold) ||
114 get_user(params.silence_threshold, &src->silence_threshold) ||
115 get_user(params.silence_size, &src->silence_size) ||
116 get_user(params.tstamp_type, &src->tstamp_type) ||
117 get_user(params.proto, &src->proto))
118 return -EFAULT;
119 /*
120 * Check silent_size parameter. Since we have 64bit boundary,
121 * silence_size must be compared with the 32bit boundary.
122 */
123 boundary = recalculate_boundary(substream->runtime);
124 if (boundary && params.silence_size >= boundary)
125 params.silence_size = substream->runtime->boundary;
126 err = snd_pcm_sw_params(substream, ¶ms);
127 if (err < 0)
128 return err;
129 if (boundary && put_user(boundary, &src->boundary))
130 return -EFAULT;
131 return err;
132}
133
134struct snd_pcm_channel_info32 {
135 u32 channel;
136 u32 offset;
137 u32 first;
138 u32 step;
139};
140
141static int snd_pcm_ioctl_channel_info_compat(struct snd_pcm_substream *substream,
142 struct snd_pcm_channel_info32 __user *src)
143{
144 struct snd_pcm_channel_info info;
145 int err;
146
147 if (get_user(info.channel, &src->channel) ||
148 get_user(info.offset, &src->offset) ||
149 get_user(info.first, &src->first) ||
150 get_user(info.step, &src->step))
151 return -EFAULT;
152 err = snd_pcm_channel_info(substream, &info);
153 if (err < 0)
154 return err;
155 if (put_user(info.channel, &src->channel) ||
156 put_user(info.offset, &src->offset) ||
157 put_user(info.first, &src->first) ||
158 put_user(info.step, &src->step))
159 return -EFAULT;
160 return err;
161}
162
163#ifdef CONFIG_X86_X32
164/* X32 ABI has the same struct as x86-64 for snd_pcm_channel_info */
165static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
166 struct snd_pcm_channel_info __user *src);
167#define snd_pcm_ioctl_channel_info_x32(s, p) \
168 snd_pcm_channel_info_user(s, p)
169#endif /* CONFIG_X86_X32 */
170
171struct snd_pcm_status32 {
172 s32 state;
173 struct compat_timespec trigger_tstamp;
174 struct compat_timespec tstamp;
175 u32 appl_ptr;
176 u32 hw_ptr;
177 s32 delay;
178 u32 avail;
179 u32 avail_max;
180 u32 overrange;
181 s32 suspended_state;
182 u32 audio_tstamp_data;
183 struct compat_timespec audio_tstamp;
184 struct compat_timespec driver_tstamp;
185 u32 audio_tstamp_accuracy;
186 unsigned char reserved[52-2*sizeof(struct compat_timespec)];
187} __attribute__((packed));
188
189
190static int snd_pcm_status_user_compat(struct snd_pcm_substream *substream,
191 struct snd_pcm_status32 __user *src,
192 bool ext)
193{
194 struct snd_pcm_status status;
195 int err;
196
197 memset(&status, 0, sizeof(status));
198 /*
199 * with extension, parameters are read/write,
200 * get audio_tstamp_data from user,
201 * ignore rest of status structure
202 */
203 if (ext && get_user(status.audio_tstamp_data,
204 (u32 __user *)(&src->audio_tstamp_data)))
205 return -EFAULT;
206 err = snd_pcm_status(substream, &status);
207 if (err < 0)
208 return err;
209
210 if (clear_user(src, sizeof(*src)))
211 return -EFAULT;
212 if (put_user(status.state, &src->state) ||
213 compat_put_timespec(&status.trigger_tstamp, &src->trigger_tstamp) ||
214 compat_put_timespec(&status.tstamp, &src->tstamp) ||
215 put_user(status.appl_ptr, &src->appl_ptr) ||
216 put_user(status.hw_ptr, &src->hw_ptr) ||
217 put_user(status.delay, &src->delay) ||
218 put_user(status.avail, &src->avail) ||
219 put_user(status.avail_max, &src->avail_max) ||
220 put_user(status.overrange, &src->overrange) ||
221 put_user(status.suspended_state, &src->suspended_state) ||
222 put_user(status.audio_tstamp_data, &src->audio_tstamp_data) ||
223 compat_put_timespec(&status.audio_tstamp, &src->audio_tstamp) ||
224 compat_put_timespec(&status.driver_tstamp, &src->driver_tstamp) ||
225 put_user(status.audio_tstamp_accuracy, &src->audio_tstamp_accuracy))
226 return -EFAULT;
227
228 return err;
229}
230
231#ifdef CONFIG_X86_X32
232/* X32 ABI has 64bit timespec and 64bit alignment */
233struct snd_pcm_status_x32 {
234 s32 state;
235 u32 rsvd; /* alignment */
236 struct timespec trigger_tstamp;
237 struct timespec tstamp;
238 u32 appl_ptr;
239 u32 hw_ptr;
240 s32 delay;
241 u32 avail;
242 u32 avail_max;
243 u32 overrange;
244 s32 suspended_state;
245 u32 audio_tstamp_data;
246 struct timespec audio_tstamp;
247 struct timespec driver_tstamp;
248 u32 audio_tstamp_accuracy;
249 unsigned char reserved[52-2*sizeof(struct timespec)];
250} __packed;
251
252#define put_timespec(src, dst) copy_to_user(dst, src, sizeof(*dst))
253
254static int snd_pcm_status_user_x32(struct snd_pcm_substream *substream,
255 struct snd_pcm_status_x32 __user *src,
256 bool ext)
257{
258 struct snd_pcm_status status;
259 int err;
260
261 memset(&status, 0, sizeof(status));
262 /*
263 * with extension, parameters are read/write,
264 * get audio_tstamp_data from user,
265 * ignore rest of status structure
266 */
267 if (ext && get_user(status.audio_tstamp_data,
268 (u32 __user *)(&src->audio_tstamp_data)))
269 return -EFAULT;
270 err = snd_pcm_status(substream, &status);
271 if (err < 0)
272 return err;
273
274 if (clear_user(src, sizeof(*src)))
275 return -EFAULT;
276 if (put_user(status.state, &src->state) ||
277 put_timespec(&status.trigger_tstamp, &src->trigger_tstamp) ||
278 put_timespec(&status.tstamp, &src->tstamp) ||
279 put_user(status.appl_ptr, &src->appl_ptr) ||
280 put_user(status.hw_ptr, &src->hw_ptr) ||
281 put_user(status.delay, &src->delay) ||
282 put_user(status.avail, &src->avail) ||
283 put_user(status.avail_max, &src->avail_max) ||
284 put_user(status.overrange, &src->overrange) ||
285 put_user(status.suspended_state, &src->suspended_state) ||
286 put_user(status.audio_tstamp_data, &src->audio_tstamp_data) ||
287 put_timespec(&status.audio_tstamp, &src->audio_tstamp) ||
288 put_timespec(&status.driver_tstamp, &src->driver_tstamp) ||
289 put_user(status.audio_tstamp_accuracy, &src->audio_tstamp_accuracy))
290 return -EFAULT;
291
292 return err;
293}
294#endif /* CONFIG_X86_X32 */
295
296/* both for HW_PARAMS and HW_REFINE */
297static int snd_pcm_ioctl_hw_params_compat(struct snd_pcm_substream *substream,
298 int refine,
299 struct snd_pcm_hw_params32 __user *data32)
300{
301 struct snd_pcm_hw_params *data;
302 struct snd_pcm_runtime *runtime;
303 int err;
304
305 if (! (runtime = substream->runtime))
306 return -ENOTTY;
307
308 data = kmalloc(sizeof(*data), GFP_KERNEL);
309 if (!data)
310 return -ENOMEM;
311
312 /* only fifo_size (RO from userspace) is different, so just copy all */
313 if (copy_from_user(data, data32, sizeof(*data32))) {
314 err = -EFAULT;
315 goto error;
316 }
317
318 if (refine)
319 err = snd_pcm_hw_refine(substream, data);
320 else
321 err = snd_pcm_hw_params(substream, data);
322 if (err < 0)
323 goto error;
324 if (copy_to_user(data32, data, sizeof(*data32)) ||
325 put_user(data->fifo_size, &data32->fifo_size)) {
326 err = -EFAULT;
327 goto error;
328 }
329
330 if (! refine) {
331 unsigned int new_boundary = recalculate_boundary(runtime);
332 if (new_boundary)
333 runtime->boundary = new_boundary;
334 }
335 error:
336 kfree(data);
337 return err;
338}
339
340
341/*
342 */
343struct snd_xferi32 {
344 s32 result;
345 u32 buf;
346 u32 frames;
347};
348
349static int snd_pcm_ioctl_xferi_compat(struct snd_pcm_substream *substream,
350 int dir, struct snd_xferi32 __user *data32)
351{
352 compat_caddr_t buf;
353 u32 frames;
354 int err;
355
356 if (! substream->runtime)
357 return -ENOTTY;
358 if (substream->stream != dir)
359 return -EINVAL;
360 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN)
361 return -EBADFD;
362
363 if (get_user(buf, &data32->buf) ||
364 get_user(frames, &data32->frames))
365 return -EFAULT;
366
367 if (dir == SNDRV_PCM_STREAM_PLAYBACK)
368 err = snd_pcm_lib_write(substream, compat_ptr(buf), frames);
369 else
370 err = snd_pcm_lib_read(substream, compat_ptr(buf), frames);
371 if (err < 0)
372 return err;
373 /* copy the result */
374 if (put_user(err, &data32->result))
375 return -EFAULT;
376 return 0;
377}
378
379
380/* snd_xfern needs remapping of bufs */
381struct snd_xfern32 {
382 s32 result;
383 u32 bufs; /* this is void **; */
384 u32 frames;
385};
386
387/*
388 * xfern ioctl nees to copy (up to) 128 pointers on stack.
389 * although we may pass the copied pointers through f_op->ioctl, but the ioctl
390 * handler there expands again the same 128 pointers on stack, so it is better
391 * to handle the function (calling pcm_readv/writev) directly in this handler.
392 */
393static int snd_pcm_ioctl_xfern_compat(struct snd_pcm_substream *substream,
394 int dir, struct snd_xfern32 __user *data32)
395{
396 compat_caddr_t buf;
397 compat_caddr_t __user *bufptr;
398 u32 frames;
399 void __user **bufs;
400 int err, ch, i;
401
402 if (! substream->runtime)
403 return -ENOTTY;
404 if (substream->stream != dir)
405 return -EINVAL;
406 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN)
407 return -EBADFD;
408
409 if ((ch = substream->runtime->channels) > 128)
410 return -EINVAL;
411 if (get_user(buf, &data32->bufs) ||
412 get_user(frames, &data32->frames))
413 return -EFAULT;
414 bufptr = compat_ptr(buf);
415 bufs = kmalloc_array(ch, sizeof(void __user *), GFP_KERNEL);
416 if (bufs == NULL)
417 return -ENOMEM;
418 for (i = 0; i < ch; i++) {
419 u32 ptr;
420 if (get_user(ptr, bufptr)) {
421 kfree(bufs);
422 return -EFAULT;
423 }
424 bufs[i] = compat_ptr(ptr);
425 bufptr++;
426 }
427 if (dir == SNDRV_PCM_STREAM_PLAYBACK)
428 err = snd_pcm_lib_writev(substream, bufs, frames);
429 else
430 err = snd_pcm_lib_readv(substream, bufs, frames);
431 if (err >= 0) {
432 if (put_user(err, &data32->result))
433 err = -EFAULT;
434 }
435 kfree(bufs);
436 return err;
437}
438
439
440struct snd_pcm_mmap_status32 {
441 s32 state;
442 s32 pad1;
443 u32 hw_ptr;
444 struct compat_timespec tstamp;
445 s32 suspended_state;
446 struct compat_timespec audio_tstamp;
447} __attribute__((packed));
448
449struct snd_pcm_mmap_control32 {
450 u32 appl_ptr;
451 u32 avail_min;
452};
453
454struct snd_pcm_sync_ptr32 {
455 u32 flags;
456 union {
457 struct snd_pcm_mmap_status32 status;
458 unsigned char reserved[64];
459 } s;
460 union {
461 struct snd_pcm_mmap_control32 control;
462 unsigned char reserved[64];
463 } c;
464} __attribute__((packed));
465
466static int snd_pcm_ioctl_sync_ptr_compat(struct snd_pcm_substream *substream,
467 struct snd_pcm_sync_ptr32 __user *src)
468{
469 struct snd_pcm_runtime *runtime = substream->runtime;
470 volatile struct snd_pcm_mmap_status *status;
471 volatile struct snd_pcm_mmap_control *control;
472 u32 sflags;
473 struct snd_pcm_mmap_control scontrol;
474 struct snd_pcm_mmap_status sstatus;
475 snd_pcm_uframes_t boundary;
476 int err;
477
478 if (snd_BUG_ON(!runtime))
479 return -EINVAL;
480
481 if (get_user(sflags, &src->flags) ||
482 get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
483 get_user(scontrol.avail_min, &src->c.control.avail_min))
484 return -EFAULT;
485 if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
486 err = snd_pcm_hwsync(substream);
487 if (err < 0)
488 return err;
489 }
490 status = runtime->status;
491 control = runtime->control;
492 boundary = recalculate_boundary(runtime);
493 if (! boundary)
494 boundary = 0x7fffffff;
495 snd_pcm_stream_lock_irq(substream);
496 /* FIXME: we should consider the boundary for the sync from app */
497 if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
498 control->appl_ptr = scontrol.appl_ptr;
499 else
500 scontrol.appl_ptr = control->appl_ptr % boundary;
501 if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
502 control->avail_min = scontrol.avail_min;
503 else
504 scontrol.avail_min = control->avail_min;
505 sstatus.state = status->state;
506 sstatus.hw_ptr = status->hw_ptr % boundary;
507 sstatus.tstamp = status->tstamp;
508 sstatus.suspended_state = status->suspended_state;
509 sstatus.audio_tstamp = status->audio_tstamp;
510 snd_pcm_stream_unlock_irq(substream);
511 if (put_user(sstatus.state, &src->s.status.state) ||
512 put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) ||
513 compat_put_timespec(&sstatus.tstamp, &src->s.status.tstamp) ||
514 put_user(sstatus.suspended_state, &src->s.status.suspended_state) ||
515 compat_put_timespec(&sstatus.audio_tstamp,
516 &src->s.status.audio_tstamp) ||
517 put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
518 put_user(scontrol.avail_min, &src->c.control.avail_min))
519 return -EFAULT;
520
521 return 0;
522}
523
524#ifdef CONFIG_X86_X32
525/* X32 ABI has 64bit timespec and 64bit alignment */
526struct snd_pcm_mmap_status_x32 {
527 s32 state;
528 s32 pad1;
529 u32 hw_ptr;
530 u32 pad2; /* alignment */
531 struct timespec tstamp;
532 s32 suspended_state;
533 s32 pad3;
534 struct timespec audio_tstamp;
535} __packed;
536
537struct snd_pcm_mmap_control_x32 {
538 u32 appl_ptr;
539 u32 avail_min;
540};
541
542struct snd_pcm_sync_ptr_x32 {
543 u32 flags;
544 u32 rsvd; /* alignment */
545 union {
546 struct snd_pcm_mmap_status_x32 status;
547 unsigned char reserved[64];
548 } s;
549 union {
550 struct snd_pcm_mmap_control_x32 control;
551 unsigned char reserved[64];
552 } c;
553} __packed;
554
555static int snd_pcm_ioctl_sync_ptr_x32(struct snd_pcm_substream *substream,
556 struct snd_pcm_sync_ptr_x32 __user *src)
557{
558 struct snd_pcm_runtime *runtime = substream->runtime;
559 volatile struct snd_pcm_mmap_status *status;
560 volatile struct snd_pcm_mmap_control *control;
561 u32 sflags;
562 struct snd_pcm_mmap_control scontrol;
563 struct snd_pcm_mmap_status sstatus;
564 snd_pcm_uframes_t boundary;
565 int err;
566
567 if (snd_BUG_ON(!runtime))
568 return -EINVAL;
569
570 if (get_user(sflags, &src->flags) ||
571 get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
572 get_user(scontrol.avail_min, &src->c.control.avail_min))
573 return -EFAULT;
574 if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
575 err = snd_pcm_hwsync(substream);
576 if (err < 0)
577 return err;
578 }
579 status = runtime->status;
580 control = runtime->control;
581 boundary = recalculate_boundary(runtime);
582 if (!boundary)
583 boundary = 0x7fffffff;
584 snd_pcm_stream_lock_irq(substream);
585 /* FIXME: we should consider the boundary for the sync from app */
586 if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
587 control->appl_ptr = scontrol.appl_ptr;
588 else
589 scontrol.appl_ptr = control->appl_ptr % boundary;
590 if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
591 control->avail_min = scontrol.avail_min;
592 else
593 scontrol.avail_min = control->avail_min;
594 sstatus.state = status->state;
595 sstatus.hw_ptr = status->hw_ptr % boundary;
596 sstatus.tstamp = status->tstamp;
597 sstatus.suspended_state = status->suspended_state;
598 sstatus.audio_tstamp = status->audio_tstamp;
599 snd_pcm_stream_unlock_irq(substream);
600 if (put_user(sstatus.state, &src->s.status.state) ||
601 put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) ||
602 put_timespec(&sstatus.tstamp, &src->s.status.tstamp) ||
603 put_user(sstatus.suspended_state, &src->s.status.suspended_state) ||
604 put_timespec(&sstatus.audio_tstamp, &src->s.status.audio_tstamp) ||
605 put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
606 put_user(scontrol.avail_min, &src->c.control.avail_min))
607 return -EFAULT;
608
609 return 0;
610}
611#endif /* CONFIG_X86_X32 */
612
613/*
614 */
615enum {
616 SNDRV_PCM_IOCTL_HW_REFINE32 = _IOWR('A', 0x10, struct snd_pcm_hw_params32),
617 SNDRV_PCM_IOCTL_HW_PARAMS32 = _IOWR('A', 0x11, struct snd_pcm_hw_params32),
618 SNDRV_PCM_IOCTL_SW_PARAMS32 = _IOWR('A', 0x13, struct snd_pcm_sw_params32),
619 SNDRV_PCM_IOCTL_STATUS32 = _IOR('A', 0x20, struct snd_pcm_status32),
620 SNDRV_PCM_IOCTL_STATUS_EXT32 = _IOWR('A', 0x24, struct snd_pcm_status32),
621 SNDRV_PCM_IOCTL_DELAY32 = _IOR('A', 0x21, s32),
622 SNDRV_PCM_IOCTL_CHANNEL_INFO32 = _IOR('A', 0x32, struct snd_pcm_channel_info32),
623 SNDRV_PCM_IOCTL_REWIND32 = _IOW('A', 0x46, u32),
624 SNDRV_PCM_IOCTL_FORWARD32 = _IOW('A', 0x49, u32),
625 SNDRV_PCM_IOCTL_WRITEI_FRAMES32 = _IOW('A', 0x50, struct snd_xferi32),
626 SNDRV_PCM_IOCTL_READI_FRAMES32 = _IOR('A', 0x51, struct snd_xferi32),
627 SNDRV_PCM_IOCTL_WRITEN_FRAMES32 = _IOW('A', 0x52, struct snd_xfern32),
628 SNDRV_PCM_IOCTL_READN_FRAMES32 = _IOR('A', 0x53, struct snd_xfern32),
629 SNDRV_PCM_IOCTL_SYNC_PTR32 = _IOWR('A', 0x23, struct snd_pcm_sync_ptr32),
630#ifdef CONFIG_X86_X32
631 SNDRV_PCM_IOCTL_CHANNEL_INFO_X32 = _IOR('A', 0x32, struct snd_pcm_channel_info),
632 SNDRV_PCM_IOCTL_STATUS_X32 = _IOR('A', 0x20, struct snd_pcm_status_x32),
633 SNDRV_PCM_IOCTL_STATUS_EXT_X32 = _IOWR('A', 0x24, struct snd_pcm_status_x32),
634 SNDRV_PCM_IOCTL_SYNC_PTR_X32 = _IOWR('A', 0x23, struct snd_pcm_sync_ptr_x32),
635#endif /* CONFIG_X86_X32 */
636};
637
638static long snd_pcm_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
639{
640 struct snd_pcm_file *pcm_file;
641 struct snd_pcm_substream *substream;
642 void __user *argp = compat_ptr(arg);
643
644 pcm_file = file->private_data;
645 if (! pcm_file)
646 return -ENOTTY;
647 substream = pcm_file->substream;
648 if (! substream)
649 return -ENOTTY;
650
651 /*
652 * When PCM is used on 32bit mode, we need to disable
653 * mmap of PCM status/control records because of the size
654 * incompatibility.
655 */
656 pcm_file->no_compat_mmap = 1;
657
658 switch (cmd) {
659 case SNDRV_PCM_IOCTL_PVERSION:
660 case SNDRV_PCM_IOCTL_INFO:
661 case SNDRV_PCM_IOCTL_TSTAMP:
662 case SNDRV_PCM_IOCTL_TTSTAMP:
663 case SNDRV_PCM_IOCTL_USER_PVERSION:
664 case SNDRV_PCM_IOCTL_HWSYNC:
665 case SNDRV_PCM_IOCTL_PREPARE:
666 case SNDRV_PCM_IOCTL_RESET:
667 case SNDRV_PCM_IOCTL_START:
668 case SNDRV_PCM_IOCTL_DROP:
669 case SNDRV_PCM_IOCTL_DRAIN:
670 case SNDRV_PCM_IOCTL_PAUSE:
671 case SNDRV_PCM_IOCTL_HW_FREE:
672 case SNDRV_PCM_IOCTL_RESUME:
673 case SNDRV_PCM_IOCTL_XRUN:
674 case SNDRV_PCM_IOCTL_LINK:
675 case SNDRV_PCM_IOCTL_UNLINK:
676 return snd_pcm_common_ioctl(file, substream, cmd, argp);
677 case SNDRV_PCM_IOCTL_HW_REFINE32:
678 return snd_pcm_ioctl_hw_params_compat(substream, 1, argp);
679 case SNDRV_PCM_IOCTL_HW_PARAMS32:
680 return snd_pcm_ioctl_hw_params_compat(substream, 0, argp);
681 case SNDRV_PCM_IOCTL_SW_PARAMS32:
682 return snd_pcm_ioctl_sw_params_compat(substream, argp);
683 case SNDRV_PCM_IOCTL_STATUS32:
684 return snd_pcm_status_user_compat(substream, argp, false);
685 case SNDRV_PCM_IOCTL_STATUS_EXT32:
686 return snd_pcm_status_user_compat(substream, argp, true);
687 case SNDRV_PCM_IOCTL_SYNC_PTR32:
688 return snd_pcm_ioctl_sync_ptr_compat(substream, argp);
689 case SNDRV_PCM_IOCTL_CHANNEL_INFO32:
690 return snd_pcm_ioctl_channel_info_compat(substream, argp);
691 case SNDRV_PCM_IOCTL_WRITEI_FRAMES32:
692 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
693 case SNDRV_PCM_IOCTL_READI_FRAMES32:
694 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
695 case SNDRV_PCM_IOCTL_WRITEN_FRAMES32:
696 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
697 case SNDRV_PCM_IOCTL_READN_FRAMES32:
698 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
699 case SNDRV_PCM_IOCTL_DELAY32:
700 return snd_pcm_ioctl_delay_compat(substream, argp);
701 case SNDRV_PCM_IOCTL_REWIND32:
702 return snd_pcm_ioctl_rewind_compat(substream, argp);
703 case SNDRV_PCM_IOCTL_FORWARD32:
704 return snd_pcm_ioctl_forward_compat(substream, argp);
705#ifdef CONFIG_X86_X32
706 case SNDRV_PCM_IOCTL_STATUS_X32:
707 return snd_pcm_status_user_x32(substream, argp, false);
708 case SNDRV_PCM_IOCTL_STATUS_EXT_X32:
709 return snd_pcm_status_user_x32(substream, argp, true);
710 case SNDRV_PCM_IOCTL_SYNC_PTR_X32:
711 return snd_pcm_ioctl_sync_ptr_x32(substream, argp);
712 case SNDRV_PCM_IOCTL_CHANNEL_INFO_X32:
713 return snd_pcm_ioctl_channel_info_x32(substream, argp);
714#endif /* CONFIG_X86_X32 */
715 }
716
717 return -ENOIOCTLCMD;
718}
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 mm_segment_t fs;
31 int err;
32
33 fs = snd_enter_user();
34 err = snd_pcm_delay(substream, &delay);
35 snd_leave_user(fs);
36 if (err < 0)
37 return err;
38 if (put_user(delay, src))
39 return -EFAULT;
40 return err;
41}
42
43static int snd_pcm_ioctl_rewind_compat(struct snd_pcm_substream *substream,
44 u32 __user *src)
45{
46 snd_pcm_uframes_t frames;
47 int err;
48
49 if (get_user(frames, src))
50 return -EFAULT;
51 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
52 err = snd_pcm_playback_rewind(substream, frames);
53 else
54 err = snd_pcm_capture_rewind(substream, frames);
55 if (put_user(err, src))
56 return -EFAULT;
57 return err < 0 ? err : 0;
58}
59
60static int snd_pcm_ioctl_forward_compat(struct snd_pcm_substream *substream,
61 u32 __user *src)
62{
63 snd_pcm_uframes_t frames;
64 int err;
65
66 if (get_user(frames, src))
67 return -EFAULT;
68 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
69 err = snd_pcm_playback_forward(substream, frames);
70 else
71 err = snd_pcm_capture_forward(substream, frames);
72 if (put_user(err, src))
73 return -EFAULT;
74 return err < 0 ? err : 0;
75}
76
77struct snd_pcm_hw_params32 {
78 u32 flags;
79 struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; /* this must be identical */
80 struct snd_mask mres[5]; /* reserved masks */
81 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
82 struct snd_interval ires[9]; /* reserved intervals */
83 u32 rmask;
84 u32 cmask;
85 u32 info;
86 u32 msbits;
87 u32 rate_num;
88 u32 rate_den;
89 u32 fifo_size;
90 unsigned char reserved[64];
91};
92
93struct snd_pcm_sw_params32 {
94 s32 tstamp_mode;
95 u32 period_step;
96 u32 sleep_min;
97 u32 avail_min;
98 u32 xfer_align;
99 u32 start_threshold;
100 u32 stop_threshold;
101 u32 silence_threshold;
102 u32 silence_size;
103 u32 boundary;
104 u32 proto;
105 u32 tstamp_type;
106 unsigned char reserved[56];
107};
108
109/* recalcuate the boundary within 32bit */
110static snd_pcm_uframes_t recalculate_boundary(struct snd_pcm_runtime *runtime)
111{
112 snd_pcm_uframes_t boundary;
113
114 if (! runtime->buffer_size)
115 return 0;
116 boundary = runtime->buffer_size;
117 while (boundary * 2 <= 0x7fffffffUL - runtime->buffer_size)
118 boundary *= 2;
119 return boundary;
120}
121
122static int snd_pcm_ioctl_sw_params_compat(struct snd_pcm_substream *substream,
123 struct snd_pcm_sw_params32 __user *src)
124{
125 struct snd_pcm_sw_params params;
126 snd_pcm_uframes_t boundary;
127 int err;
128
129 memset(¶ms, 0, sizeof(params));
130 if (get_user(params.tstamp_mode, &src->tstamp_mode) ||
131 get_user(params.period_step, &src->period_step) ||
132 get_user(params.sleep_min, &src->sleep_min) ||
133 get_user(params.avail_min, &src->avail_min) ||
134 get_user(params.xfer_align, &src->xfer_align) ||
135 get_user(params.start_threshold, &src->start_threshold) ||
136 get_user(params.stop_threshold, &src->stop_threshold) ||
137 get_user(params.silence_threshold, &src->silence_threshold) ||
138 get_user(params.silence_size, &src->silence_size) ||
139 get_user(params.tstamp_type, &src->tstamp_type) ||
140 get_user(params.proto, &src->proto))
141 return -EFAULT;
142 /*
143 * Check silent_size parameter. Since we have 64bit boundary,
144 * silence_size must be compared with the 32bit boundary.
145 */
146 boundary = recalculate_boundary(substream->runtime);
147 if (boundary && params.silence_size >= boundary)
148 params.silence_size = substream->runtime->boundary;
149 err = snd_pcm_sw_params(substream, ¶ms);
150 if (err < 0)
151 return err;
152 if (boundary && put_user(boundary, &src->boundary))
153 return -EFAULT;
154 return err;
155}
156
157struct snd_pcm_channel_info32 {
158 u32 channel;
159 u32 offset;
160 u32 first;
161 u32 step;
162};
163
164static int snd_pcm_ioctl_channel_info_compat(struct snd_pcm_substream *substream,
165 struct snd_pcm_channel_info32 __user *src)
166{
167 struct snd_pcm_channel_info info;
168 int err;
169
170 if (get_user(info.channel, &src->channel) ||
171 get_user(info.offset, &src->offset) ||
172 get_user(info.first, &src->first) ||
173 get_user(info.step, &src->step))
174 return -EFAULT;
175 err = snd_pcm_channel_info(substream, &info);
176 if (err < 0)
177 return err;
178 if (put_user(info.channel, &src->channel) ||
179 put_user(info.offset, &src->offset) ||
180 put_user(info.first, &src->first) ||
181 put_user(info.step, &src->step))
182 return -EFAULT;
183 return err;
184}
185
186#ifdef CONFIG_X86_X32
187/* X32 ABI has the same struct as x86-64 for snd_pcm_channel_info */
188static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
189 struct snd_pcm_channel_info __user *src);
190#define snd_pcm_ioctl_channel_info_x32(s, p) \
191 snd_pcm_channel_info_user(s, p)
192#endif /* CONFIG_X86_X32 */
193
194struct snd_pcm_status32 {
195 s32 state;
196 struct compat_timespec trigger_tstamp;
197 struct compat_timespec tstamp;
198 u32 appl_ptr;
199 u32 hw_ptr;
200 s32 delay;
201 u32 avail;
202 u32 avail_max;
203 u32 overrange;
204 s32 suspended_state;
205 u32 audio_tstamp_data;
206 struct compat_timespec audio_tstamp;
207 struct compat_timespec driver_tstamp;
208 u32 audio_tstamp_accuracy;
209 unsigned char reserved[52-2*sizeof(struct compat_timespec)];
210} __attribute__((packed));
211
212
213static int snd_pcm_status_user_compat(struct snd_pcm_substream *substream,
214 struct snd_pcm_status32 __user *src,
215 bool ext)
216{
217 struct snd_pcm_status status;
218 int err;
219
220 memset(&status, 0, sizeof(status));
221 /*
222 * with extension, parameters are read/write,
223 * get audio_tstamp_data from user,
224 * ignore rest of status structure
225 */
226 if (ext && get_user(status.audio_tstamp_data,
227 (u32 __user *)(&src->audio_tstamp_data)))
228 return -EFAULT;
229 err = snd_pcm_status(substream, &status);
230 if (err < 0)
231 return err;
232
233 if (clear_user(src, sizeof(*src)))
234 return -EFAULT;
235 if (put_user(status.state, &src->state) ||
236 compat_put_timespec(&status.trigger_tstamp, &src->trigger_tstamp) ||
237 compat_put_timespec(&status.tstamp, &src->tstamp) ||
238 put_user(status.appl_ptr, &src->appl_ptr) ||
239 put_user(status.hw_ptr, &src->hw_ptr) ||
240 put_user(status.delay, &src->delay) ||
241 put_user(status.avail, &src->avail) ||
242 put_user(status.avail_max, &src->avail_max) ||
243 put_user(status.overrange, &src->overrange) ||
244 put_user(status.suspended_state, &src->suspended_state) ||
245 put_user(status.audio_tstamp_data, &src->audio_tstamp_data) ||
246 compat_put_timespec(&status.audio_tstamp, &src->audio_tstamp) ||
247 compat_put_timespec(&status.driver_tstamp, &src->driver_tstamp) ||
248 put_user(status.audio_tstamp_accuracy, &src->audio_tstamp_accuracy))
249 return -EFAULT;
250
251 return err;
252}
253
254#ifdef CONFIG_X86_X32
255/* X32 ABI has 64bit timespec and 64bit alignment */
256struct snd_pcm_status_x32 {
257 s32 state;
258 u32 rsvd; /* alignment */
259 struct timespec trigger_tstamp;
260 struct timespec tstamp;
261 u32 appl_ptr;
262 u32 hw_ptr;
263 s32 delay;
264 u32 avail;
265 u32 avail_max;
266 u32 overrange;
267 s32 suspended_state;
268 u32 audio_tstamp_data;
269 struct timespec audio_tstamp;
270 struct timespec driver_tstamp;
271 u32 audio_tstamp_accuracy;
272 unsigned char reserved[52-2*sizeof(struct timespec)];
273} __packed;
274
275#define put_timespec(src, dst) copy_to_user(dst, src, sizeof(*dst))
276
277static int snd_pcm_status_user_x32(struct snd_pcm_substream *substream,
278 struct snd_pcm_status_x32 __user *src,
279 bool ext)
280{
281 struct snd_pcm_status status;
282 int err;
283
284 memset(&status, 0, sizeof(status));
285 /*
286 * with extension, parameters are read/write,
287 * get audio_tstamp_data from user,
288 * ignore rest of status structure
289 */
290 if (ext && get_user(status.audio_tstamp_data,
291 (u32 __user *)(&src->audio_tstamp_data)))
292 return -EFAULT;
293 err = snd_pcm_status(substream, &status);
294 if (err < 0)
295 return err;
296
297 if (clear_user(src, sizeof(*src)))
298 return -EFAULT;
299 if (put_user(status.state, &src->state) ||
300 put_timespec(&status.trigger_tstamp, &src->trigger_tstamp) ||
301 put_timespec(&status.tstamp, &src->tstamp) ||
302 put_user(status.appl_ptr, &src->appl_ptr) ||
303 put_user(status.hw_ptr, &src->hw_ptr) ||
304 put_user(status.delay, &src->delay) ||
305 put_user(status.avail, &src->avail) ||
306 put_user(status.avail_max, &src->avail_max) ||
307 put_user(status.overrange, &src->overrange) ||
308 put_user(status.suspended_state, &src->suspended_state) ||
309 put_user(status.audio_tstamp_data, &src->audio_tstamp_data) ||
310 put_timespec(&status.audio_tstamp, &src->audio_tstamp) ||
311 put_timespec(&status.driver_tstamp, &src->driver_tstamp) ||
312 put_user(status.audio_tstamp_accuracy, &src->audio_tstamp_accuracy))
313 return -EFAULT;
314
315 return err;
316}
317#endif /* CONFIG_X86_X32 */
318
319/* both for HW_PARAMS and HW_REFINE */
320static int snd_pcm_ioctl_hw_params_compat(struct snd_pcm_substream *substream,
321 int refine,
322 struct snd_pcm_hw_params32 __user *data32)
323{
324 struct snd_pcm_hw_params *data;
325 struct snd_pcm_runtime *runtime;
326 int err;
327
328 if (! (runtime = substream->runtime))
329 return -ENOTTY;
330
331 data = kmalloc(sizeof(*data), GFP_KERNEL);
332 if (!data)
333 return -ENOMEM;
334
335 /* only fifo_size (RO from userspace) is different, so just copy all */
336 if (copy_from_user(data, data32, sizeof(*data32))) {
337 err = -EFAULT;
338 goto error;
339 }
340
341 if (refine)
342 err = snd_pcm_hw_refine(substream, data);
343 else
344 err = snd_pcm_hw_params(substream, data);
345 if (err < 0)
346 goto error;
347 if (copy_to_user(data32, data, sizeof(*data32)) ||
348 put_user(data->fifo_size, &data32->fifo_size)) {
349 err = -EFAULT;
350 goto error;
351 }
352
353 if (! refine) {
354 unsigned int new_boundary = recalculate_boundary(runtime);
355 if (new_boundary)
356 runtime->boundary = new_boundary;
357 }
358 error:
359 kfree(data);
360 return err;
361}
362
363
364/*
365 */
366struct snd_xferi32 {
367 s32 result;
368 u32 buf;
369 u32 frames;
370};
371
372static int snd_pcm_ioctl_xferi_compat(struct snd_pcm_substream *substream,
373 int dir, struct snd_xferi32 __user *data32)
374{
375 compat_caddr_t buf;
376 u32 frames;
377 int err;
378
379 if (! substream->runtime)
380 return -ENOTTY;
381 if (substream->stream != dir)
382 return -EINVAL;
383 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN)
384 return -EBADFD;
385
386 if (get_user(buf, &data32->buf) ||
387 get_user(frames, &data32->frames))
388 return -EFAULT;
389
390 if (dir == SNDRV_PCM_STREAM_PLAYBACK)
391 err = snd_pcm_lib_write(substream, compat_ptr(buf), frames);
392 else
393 err = snd_pcm_lib_read(substream, compat_ptr(buf), frames);
394 if (err < 0)
395 return err;
396 /* copy the result */
397 if (put_user(err, &data32->result))
398 return -EFAULT;
399 return 0;
400}
401
402
403/* snd_xfern needs remapping of bufs */
404struct snd_xfern32 {
405 s32 result;
406 u32 bufs; /* this is void **; */
407 u32 frames;
408};
409
410/*
411 * xfern ioctl nees to copy (up to) 128 pointers on stack.
412 * although we may pass the copied pointers through f_op->ioctl, but the ioctl
413 * handler there expands again the same 128 pointers on stack, so it is better
414 * to handle the function (calling pcm_readv/writev) directly in this handler.
415 */
416static int snd_pcm_ioctl_xfern_compat(struct snd_pcm_substream *substream,
417 int dir, struct snd_xfern32 __user *data32)
418{
419 compat_caddr_t buf;
420 compat_caddr_t __user *bufptr;
421 u32 frames;
422 void __user **bufs;
423 int err, ch, i;
424
425 if (! substream->runtime)
426 return -ENOTTY;
427 if (substream->stream != dir)
428 return -EINVAL;
429
430 if ((ch = substream->runtime->channels) > 128)
431 return -EINVAL;
432 if (get_user(buf, &data32->bufs) ||
433 get_user(frames, &data32->frames))
434 return -EFAULT;
435 bufptr = compat_ptr(buf);
436 bufs = kmalloc(sizeof(void __user *) * ch, GFP_KERNEL);
437 if (bufs == NULL)
438 return -ENOMEM;
439 for (i = 0; i < ch; i++) {
440 u32 ptr;
441 if (get_user(ptr, bufptr)) {
442 kfree(bufs);
443 return -EFAULT;
444 }
445 bufs[i] = compat_ptr(ptr);
446 bufptr++;
447 }
448 if (dir == SNDRV_PCM_STREAM_PLAYBACK)
449 err = snd_pcm_lib_writev(substream, bufs, frames);
450 else
451 err = snd_pcm_lib_readv(substream, bufs, frames);
452 if (err >= 0) {
453 if (put_user(err, &data32->result))
454 err = -EFAULT;
455 }
456 kfree(bufs);
457 return err;
458}
459
460
461struct snd_pcm_mmap_status32 {
462 s32 state;
463 s32 pad1;
464 u32 hw_ptr;
465 struct compat_timespec tstamp;
466 s32 suspended_state;
467 struct compat_timespec audio_tstamp;
468} __attribute__((packed));
469
470struct snd_pcm_mmap_control32 {
471 u32 appl_ptr;
472 u32 avail_min;
473};
474
475struct snd_pcm_sync_ptr32 {
476 u32 flags;
477 union {
478 struct snd_pcm_mmap_status32 status;
479 unsigned char reserved[64];
480 } s;
481 union {
482 struct snd_pcm_mmap_control32 control;
483 unsigned char reserved[64];
484 } c;
485} __attribute__((packed));
486
487static int snd_pcm_ioctl_sync_ptr_compat(struct snd_pcm_substream *substream,
488 struct snd_pcm_sync_ptr32 __user *src)
489{
490 struct snd_pcm_runtime *runtime = substream->runtime;
491 volatile struct snd_pcm_mmap_status *status;
492 volatile struct snd_pcm_mmap_control *control;
493 u32 sflags;
494 struct snd_pcm_mmap_control scontrol;
495 struct snd_pcm_mmap_status sstatus;
496 snd_pcm_uframes_t boundary;
497 int err;
498
499 if (snd_BUG_ON(!runtime))
500 return -EINVAL;
501
502 if (get_user(sflags, &src->flags) ||
503 get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
504 get_user(scontrol.avail_min, &src->c.control.avail_min))
505 return -EFAULT;
506 if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
507 err = snd_pcm_hwsync(substream);
508 if (err < 0)
509 return err;
510 }
511 status = runtime->status;
512 control = runtime->control;
513 boundary = recalculate_boundary(runtime);
514 if (! boundary)
515 boundary = 0x7fffffff;
516 snd_pcm_stream_lock_irq(substream);
517 /* FIXME: we should consider the boundary for the sync from app */
518 if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
519 control->appl_ptr = scontrol.appl_ptr;
520 else
521 scontrol.appl_ptr = control->appl_ptr % boundary;
522 if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
523 control->avail_min = scontrol.avail_min;
524 else
525 scontrol.avail_min = control->avail_min;
526 sstatus.state = status->state;
527 sstatus.hw_ptr = status->hw_ptr % boundary;
528 sstatus.tstamp = status->tstamp;
529 sstatus.suspended_state = status->suspended_state;
530 sstatus.audio_tstamp = status->audio_tstamp;
531 snd_pcm_stream_unlock_irq(substream);
532 if (put_user(sstatus.state, &src->s.status.state) ||
533 put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) ||
534 compat_put_timespec(&sstatus.tstamp, &src->s.status.tstamp) ||
535 put_user(sstatus.suspended_state, &src->s.status.suspended_state) ||
536 compat_put_timespec(&sstatus.audio_tstamp,
537 &src->s.status.audio_tstamp) ||
538 put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
539 put_user(scontrol.avail_min, &src->c.control.avail_min))
540 return -EFAULT;
541
542 return 0;
543}
544
545#ifdef CONFIG_X86_X32
546/* X32 ABI has 64bit timespec and 64bit alignment */
547struct snd_pcm_mmap_status_x32 {
548 s32 state;
549 s32 pad1;
550 u32 hw_ptr;
551 u32 pad2; /* alignment */
552 struct timespec tstamp;
553 s32 suspended_state;
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_HWSYNC:
684 case SNDRV_PCM_IOCTL_PREPARE:
685 case SNDRV_PCM_IOCTL_RESET:
686 case SNDRV_PCM_IOCTL_START:
687 case SNDRV_PCM_IOCTL_DROP:
688 case SNDRV_PCM_IOCTL_DRAIN:
689 case SNDRV_PCM_IOCTL_PAUSE:
690 case SNDRV_PCM_IOCTL_HW_FREE:
691 case SNDRV_PCM_IOCTL_RESUME:
692 case SNDRV_PCM_IOCTL_XRUN:
693 case SNDRV_PCM_IOCTL_LINK:
694 case SNDRV_PCM_IOCTL_UNLINK:
695 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
696 return snd_pcm_playback_ioctl1(file, substream, cmd, argp);
697 else
698 return snd_pcm_capture_ioctl1(file, substream, cmd, argp);
699 case SNDRV_PCM_IOCTL_HW_REFINE32:
700 return snd_pcm_ioctl_hw_params_compat(substream, 1, argp);
701 case SNDRV_PCM_IOCTL_HW_PARAMS32:
702 return snd_pcm_ioctl_hw_params_compat(substream, 0, argp);
703 case SNDRV_PCM_IOCTL_SW_PARAMS32:
704 return snd_pcm_ioctl_sw_params_compat(substream, argp);
705 case SNDRV_PCM_IOCTL_STATUS32:
706 return snd_pcm_status_user_compat(substream, argp, false);
707 case SNDRV_PCM_IOCTL_STATUS_EXT32:
708 return snd_pcm_status_user_compat(substream, argp, true);
709 case SNDRV_PCM_IOCTL_SYNC_PTR32:
710 return snd_pcm_ioctl_sync_ptr_compat(substream, argp);
711 case SNDRV_PCM_IOCTL_CHANNEL_INFO32:
712 return snd_pcm_ioctl_channel_info_compat(substream, argp);
713 case SNDRV_PCM_IOCTL_WRITEI_FRAMES32:
714 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
715 case SNDRV_PCM_IOCTL_READI_FRAMES32:
716 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
717 case SNDRV_PCM_IOCTL_WRITEN_FRAMES32:
718 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
719 case SNDRV_PCM_IOCTL_READN_FRAMES32:
720 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
721 case SNDRV_PCM_IOCTL_DELAY32:
722 return snd_pcm_ioctl_delay_compat(substream, argp);
723 case SNDRV_PCM_IOCTL_REWIND32:
724 return snd_pcm_ioctl_rewind_compat(substream, argp);
725 case SNDRV_PCM_IOCTL_FORWARD32:
726 return snd_pcm_ioctl_forward_compat(substream, argp);
727#ifdef CONFIG_X86_X32
728 case SNDRV_PCM_IOCTL_STATUS_X32:
729 return snd_pcm_status_user_x32(substream, argp, false);
730 case SNDRV_PCM_IOCTL_STATUS_EXT_X32:
731 return snd_pcm_status_user_x32(substream, argp, true);
732 case SNDRV_PCM_IOCTL_SYNC_PTR_X32:
733 return snd_pcm_ioctl_sync_ptr_x32(substream, argp);
734 case SNDRV_PCM_IOCTL_CHANNEL_INFO_X32:
735 return snd_pcm_ioctl_channel_info_x32(substream, argp);
736#endif /* CONFIG_X86_X32 */
737 }
738
739 return -ENOIOCTLCMD;
740}