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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
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}
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 unsigned char reserved[64];
105};
106
107/* recalcuate the boundary within 32bit */
108static snd_pcm_uframes_t recalculate_boundary(struct snd_pcm_runtime *runtime)
109{
110 snd_pcm_uframes_t boundary;
111
112 if (! runtime->buffer_size)
113 return 0;
114 boundary = runtime->buffer_size;
115 while (boundary * 2 <= 0x7fffffffUL - runtime->buffer_size)
116 boundary *= 2;
117 return boundary;
118}
119
120static int snd_pcm_ioctl_sw_params_compat(struct snd_pcm_substream *substream,
121 struct snd_pcm_sw_params32 __user *src)
122{
123 struct snd_pcm_sw_params params;
124 snd_pcm_uframes_t boundary;
125 int err;
126
127 memset(¶ms, 0, sizeof(params));
128 if (get_user(params.tstamp_mode, &src->tstamp_mode) ||
129 get_user(params.period_step, &src->period_step) ||
130 get_user(params.sleep_min, &src->sleep_min) ||
131 get_user(params.avail_min, &src->avail_min) ||
132 get_user(params.xfer_align, &src->xfer_align) ||
133 get_user(params.start_threshold, &src->start_threshold) ||
134 get_user(params.stop_threshold, &src->stop_threshold) ||
135 get_user(params.silence_threshold, &src->silence_threshold) ||
136 get_user(params.silence_size, &src->silence_size))
137 return -EFAULT;
138 /*
139 * Check silent_size parameter. Since we have 64bit boundary,
140 * silence_size must be compared with the 32bit boundary.
141 */
142 boundary = recalculate_boundary(substream->runtime);
143 if (boundary && params.silence_size >= boundary)
144 params.silence_size = substream->runtime->boundary;
145 err = snd_pcm_sw_params(substream, ¶ms);
146 if (err < 0)
147 return err;
148 if (boundary && put_user(boundary, &src->boundary))
149 return -EFAULT;
150 return err;
151}
152
153struct snd_pcm_channel_info32 {
154 u32 channel;
155 u32 offset;
156 u32 first;
157 u32 step;
158};
159
160static int snd_pcm_ioctl_channel_info_compat(struct snd_pcm_substream *substream,
161 struct snd_pcm_channel_info32 __user *src)
162{
163 struct snd_pcm_channel_info info;
164 int err;
165
166 if (get_user(info.channel, &src->channel) ||
167 get_user(info.offset, &src->offset) ||
168 get_user(info.first, &src->first) ||
169 get_user(info.step, &src->step))
170 return -EFAULT;
171 err = snd_pcm_channel_info(substream, &info);
172 if (err < 0)
173 return err;
174 if (put_user(info.channel, &src->channel) ||
175 put_user(info.offset, &src->offset) ||
176 put_user(info.first, &src->first) ||
177 put_user(info.step, &src->step))
178 return -EFAULT;
179 return err;
180}
181
182struct snd_pcm_status32 {
183 s32 state;
184 struct compat_timespec trigger_tstamp;
185 struct compat_timespec tstamp;
186 u32 appl_ptr;
187 u32 hw_ptr;
188 s32 delay;
189 u32 avail;
190 u32 avail_max;
191 u32 overrange;
192 s32 suspended_state;
193 unsigned char reserved[60];
194} __attribute__((packed));
195
196
197static int snd_pcm_status_user_compat(struct snd_pcm_substream *substream,
198 struct snd_pcm_status32 __user *src)
199{
200 struct snd_pcm_status status;
201 int err;
202
203 err = snd_pcm_status(substream, &status);
204 if (err < 0)
205 return err;
206
207 if (put_user(status.state, &src->state) ||
208 put_user(status.trigger_tstamp.tv_sec, &src->trigger_tstamp.tv_sec) ||
209 put_user(status.trigger_tstamp.tv_nsec, &src->trigger_tstamp.tv_nsec) ||
210 put_user(status.tstamp.tv_sec, &src->tstamp.tv_sec) ||
211 put_user(status.tstamp.tv_nsec, &src->tstamp.tv_nsec) ||
212 put_user(status.appl_ptr, &src->appl_ptr) ||
213 put_user(status.hw_ptr, &src->hw_ptr) ||
214 put_user(status.delay, &src->delay) ||
215 put_user(status.avail, &src->avail) ||
216 put_user(status.avail_max, &src->avail_max) ||
217 put_user(status.overrange, &src->overrange) ||
218 put_user(status.suspended_state, &src->suspended_state))
219 return -EFAULT;
220
221 return err;
222}
223
224/* both for HW_PARAMS and HW_REFINE */
225static int snd_pcm_ioctl_hw_params_compat(struct snd_pcm_substream *substream,
226 int refine,
227 struct snd_pcm_hw_params32 __user *data32)
228{
229 struct snd_pcm_hw_params *data;
230 struct snd_pcm_runtime *runtime;
231 int err;
232
233 if (! (runtime = substream->runtime))
234 return -ENOTTY;
235
236 /* only fifo_size is different, so just copy all */
237 data = memdup_user(data32, sizeof(*data32));
238 if (IS_ERR(data))
239 return PTR_ERR(data);
240
241 if (refine)
242 err = snd_pcm_hw_refine(substream, data);
243 else
244 err = snd_pcm_hw_params(substream, data);
245 if (err < 0)
246 goto error;
247 if (copy_to_user(data32, data, sizeof(*data32)) ||
248 put_user(data->fifo_size, &data32->fifo_size)) {
249 err = -EFAULT;
250 goto error;
251 }
252
253 if (! refine) {
254 unsigned int new_boundary = recalculate_boundary(runtime);
255 if (new_boundary)
256 runtime->boundary = new_boundary;
257 }
258 error:
259 kfree(data);
260 return err;
261}
262
263
264/*
265 */
266struct snd_xferi32 {
267 s32 result;
268 u32 buf;
269 u32 frames;
270};
271
272static int snd_pcm_ioctl_xferi_compat(struct snd_pcm_substream *substream,
273 int dir, struct snd_xferi32 __user *data32)
274{
275 compat_caddr_t buf;
276 u32 frames;
277 int err;
278
279 if (! substream->runtime)
280 return -ENOTTY;
281 if (substream->stream != dir)
282 return -EINVAL;
283 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN)
284 return -EBADFD;
285
286 if (get_user(buf, &data32->buf) ||
287 get_user(frames, &data32->frames))
288 return -EFAULT;
289
290 if (dir == SNDRV_PCM_STREAM_PLAYBACK)
291 err = snd_pcm_lib_write(substream, compat_ptr(buf), frames);
292 else
293 err = snd_pcm_lib_read(substream, compat_ptr(buf), frames);
294 if (err < 0)
295 return err;
296 /* copy the result */
297 if (put_user(err, &data32->result))
298 return -EFAULT;
299 return 0;
300}
301
302
303/* snd_xfern needs remapping of bufs */
304struct snd_xfern32 {
305 s32 result;
306 u32 bufs; /* this is void **; */
307 u32 frames;
308};
309
310/*
311 * xfern ioctl nees to copy (up to) 128 pointers on stack.
312 * although we may pass the copied pointers through f_op->ioctl, but the ioctl
313 * handler there expands again the same 128 pointers on stack, so it is better
314 * to handle the function (calling pcm_readv/writev) directly in this handler.
315 */
316static int snd_pcm_ioctl_xfern_compat(struct snd_pcm_substream *substream,
317 int dir, struct snd_xfern32 __user *data32)
318{
319 compat_caddr_t buf;
320 compat_caddr_t __user *bufptr;
321 u32 frames;
322 void __user **bufs;
323 int err, ch, i;
324
325 if (! substream->runtime)
326 return -ENOTTY;
327 if (substream->stream != dir)
328 return -EINVAL;
329
330 if ((ch = substream->runtime->channels) > 128)
331 return -EINVAL;
332 if (get_user(buf, &data32->bufs) ||
333 get_user(frames, &data32->frames))
334 return -EFAULT;
335 bufptr = compat_ptr(buf);
336 bufs = kmalloc(sizeof(void __user *) * ch, GFP_KERNEL);
337 if (bufs == NULL)
338 return -ENOMEM;
339 for (i = 0; i < ch; i++) {
340 u32 ptr;
341 if (get_user(ptr, bufptr)) {
342 kfree(bufs);
343 return -EFAULT;
344 }
345 bufs[i] = compat_ptr(ptr);
346 bufptr++;
347 }
348 if (dir == SNDRV_PCM_STREAM_PLAYBACK)
349 err = snd_pcm_lib_writev(substream, bufs, frames);
350 else
351 err = snd_pcm_lib_readv(substream, bufs, frames);
352 if (err >= 0) {
353 if (put_user(err, &data32->result))
354 err = -EFAULT;
355 }
356 kfree(bufs);
357 return err;
358}
359
360
361struct snd_pcm_mmap_status32 {
362 s32 state;
363 s32 pad1;
364 u32 hw_ptr;
365 struct compat_timespec tstamp;
366 s32 suspended_state;
367} __attribute__((packed));
368
369struct snd_pcm_mmap_control32 {
370 u32 appl_ptr;
371 u32 avail_min;
372};
373
374struct snd_pcm_sync_ptr32 {
375 u32 flags;
376 union {
377 struct snd_pcm_mmap_status32 status;
378 unsigned char reserved[64];
379 } s;
380 union {
381 struct snd_pcm_mmap_control32 control;
382 unsigned char reserved[64];
383 } c;
384} __attribute__((packed));
385
386static int snd_pcm_ioctl_sync_ptr_compat(struct snd_pcm_substream *substream,
387 struct snd_pcm_sync_ptr32 __user *src)
388{
389 struct snd_pcm_runtime *runtime = substream->runtime;
390 volatile struct snd_pcm_mmap_status *status;
391 volatile struct snd_pcm_mmap_control *control;
392 u32 sflags;
393 struct snd_pcm_mmap_control scontrol;
394 struct snd_pcm_mmap_status sstatus;
395 snd_pcm_uframes_t boundary;
396 int err;
397
398 if (snd_BUG_ON(!runtime))
399 return -EINVAL;
400
401 if (get_user(sflags, &src->flags) ||
402 get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
403 get_user(scontrol.avail_min, &src->c.control.avail_min))
404 return -EFAULT;
405 if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
406 err = snd_pcm_hwsync(substream);
407 if (err < 0)
408 return err;
409 }
410 status = runtime->status;
411 control = runtime->control;
412 boundary = recalculate_boundary(runtime);
413 if (! boundary)
414 boundary = 0x7fffffff;
415 snd_pcm_stream_lock_irq(substream);
416 /* FIXME: we should consider the boundary for the sync from app */
417 if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
418 control->appl_ptr = scontrol.appl_ptr;
419 else
420 scontrol.appl_ptr = control->appl_ptr % boundary;
421 if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
422 control->avail_min = scontrol.avail_min;
423 else
424 scontrol.avail_min = control->avail_min;
425 sstatus.state = status->state;
426 sstatus.hw_ptr = status->hw_ptr % boundary;
427 sstatus.tstamp = status->tstamp;
428 sstatus.suspended_state = status->suspended_state;
429 snd_pcm_stream_unlock_irq(substream);
430 if (put_user(sstatus.state, &src->s.status.state) ||
431 put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) ||
432 put_user(sstatus.tstamp.tv_sec, &src->s.status.tstamp.tv_sec) ||
433 put_user(sstatus.tstamp.tv_nsec, &src->s.status.tstamp.tv_nsec) ||
434 put_user(sstatus.suspended_state, &src->s.status.suspended_state) ||
435 put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
436 put_user(scontrol.avail_min, &src->c.control.avail_min))
437 return -EFAULT;
438
439 return 0;
440}
441
442
443/*
444 */
445enum {
446 SNDRV_PCM_IOCTL_HW_REFINE32 = _IOWR('A', 0x10, struct snd_pcm_hw_params32),
447 SNDRV_PCM_IOCTL_HW_PARAMS32 = _IOWR('A', 0x11, struct snd_pcm_hw_params32),
448 SNDRV_PCM_IOCTL_SW_PARAMS32 = _IOWR('A', 0x13, struct snd_pcm_sw_params32),
449 SNDRV_PCM_IOCTL_STATUS32 = _IOR('A', 0x20, struct snd_pcm_status32),
450 SNDRV_PCM_IOCTL_DELAY32 = _IOR('A', 0x21, s32),
451 SNDRV_PCM_IOCTL_CHANNEL_INFO32 = _IOR('A', 0x32, struct snd_pcm_channel_info32),
452 SNDRV_PCM_IOCTL_REWIND32 = _IOW('A', 0x46, u32),
453 SNDRV_PCM_IOCTL_FORWARD32 = _IOW('A', 0x49, u32),
454 SNDRV_PCM_IOCTL_WRITEI_FRAMES32 = _IOW('A', 0x50, struct snd_xferi32),
455 SNDRV_PCM_IOCTL_READI_FRAMES32 = _IOR('A', 0x51, struct snd_xferi32),
456 SNDRV_PCM_IOCTL_WRITEN_FRAMES32 = _IOW('A', 0x52, struct snd_xfern32),
457 SNDRV_PCM_IOCTL_READN_FRAMES32 = _IOR('A', 0x53, struct snd_xfern32),
458 SNDRV_PCM_IOCTL_SYNC_PTR32 = _IOWR('A', 0x23, struct snd_pcm_sync_ptr32),
459
460};
461
462static long snd_pcm_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
463{
464 struct snd_pcm_file *pcm_file;
465 struct snd_pcm_substream *substream;
466 void __user *argp = compat_ptr(arg);
467
468 pcm_file = file->private_data;
469 if (! pcm_file)
470 return -ENOTTY;
471 substream = pcm_file->substream;
472 if (! substream)
473 return -ENOTTY;
474
475 /*
476 * When PCM is used on 32bit mode, we need to disable
477 * mmap of PCM status/control records because of the size
478 * incompatibility.
479 */
480 pcm_file->no_compat_mmap = 1;
481
482 switch (cmd) {
483 case SNDRV_PCM_IOCTL_PVERSION:
484 case SNDRV_PCM_IOCTL_INFO:
485 case SNDRV_PCM_IOCTL_TSTAMP:
486 case SNDRV_PCM_IOCTL_TTSTAMP:
487 case SNDRV_PCM_IOCTL_HWSYNC:
488 case SNDRV_PCM_IOCTL_PREPARE:
489 case SNDRV_PCM_IOCTL_RESET:
490 case SNDRV_PCM_IOCTL_START:
491 case SNDRV_PCM_IOCTL_DROP:
492 case SNDRV_PCM_IOCTL_DRAIN:
493 case SNDRV_PCM_IOCTL_PAUSE:
494 case SNDRV_PCM_IOCTL_HW_FREE:
495 case SNDRV_PCM_IOCTL_RESUME:
496 case SNDRV_PCM_IOCTL_XRUN:
497 case SNDRV_PCM_IOCTL_LINK:
498 case SNDRV_PCM_IOCTL_UNLINK:
499 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
500 return snd_pcm_playback_ioctl1(file, substream, cmd, argp);
501 else
502 return snd_pcm_capture_ioctl1(file, substream, cmd, argp);
503 case SNDRV_PCM_IOCTL_HW_REFINE32:
504 return snd_pcm_ioctl_hw_params_compat(substream, 1, argp);
505 case SNDRV_PCM_IOCTL_HW_PARAMS32:
506 return snd_pcm_ioctl_hw_params_compat(substream, 0, argp);
507 case SNDRV_PCM_IOCTL_SW_PARAMS32:
508 return snd_pcm_ioctl_sw_params_compat(substream, argp);
509 case SNDRV_PCM_IOCTL_STATUS32:
510 return snd_pcm_status_user_compat(substream, argp);
511 case SNDRV_PCM_IOCTL_SYNC_PTR32:
512 return snd_pcm_ioctl_sync_ptr_compat(substream, argp);
513 case SNDRV_PCM_IOCTL_CHANNEL_INFO32:
514 return snd_pcm_ioctl_channel_info_compat(substream, argp);
515 case SNDRV_PCM_IOCTL_WRITEI_FRAMES32:
516 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
517 case SNDRV_PCM_IOCTL_READI_FRAMES32:
518 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
519 case SNDRV_PCM_IOCTL_WRITEN_FRAMES32:
520 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
521 case SNDRV_PCM_IOCTL_READN_FRAMES32:
522 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
523 case SNDRV_PCM_IOCTL_DELAY32:
524 return snd_pcm_ioctl_delay_compat(substream, argp);
525 case SNDRV_PCM_IOCTL_REWIND32:
526 return snd_pcm_ioctl_rewind_compat(substream, argp);
527 case SNDRV_PCM_IOCTL_FORWARD32:
528 return snd_pcm_ioctl_forward_compat(substream, argp);
529 }
530
531 return -ENOIOCTLCMD;
532}