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23#include <linux/compat.h>
24
25static int snd_pcm_ioctl_delay_compat(struct snd_pcm_substream *substream,
26 s32 __user *src)
27{
28 snd_pcm_sframes_t delay;
29 mm_segment_t fs;
30 int err;
31
32 fs = snd_enter_user();
33 err = snd_pcm_delay(substream, &delay);
34 snd_leave_user(fs);
35 if (err < 0)
36 return err;
37 if (put_user(delay, src))
38 return -EFAULT;
39 return err;
40}
41
42static int snd_pcm_ioctl_rewind_compat(struct snd_pcm_substream *substream,
43 u32 __user *src)
44{
45 snd_pcm_uframes_t frames;
46 int err;
47
48 if (get_user(frames, src))
49 return -EFAULT;
50 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
51 err = snd_pcm_playback_rewind(substream, frames);
52 else
53 err = snd_pcm_capture_rewind(substream, frames);
54 if (put_user(err, src))
55 return -EFAULT;
56 return err < 0 ? err : 0;
57}
58
59static int snd_pcm_ioctl_forward_compat(struct snd_pcm_substream *substream,
60 u32 __user *src)
61{
62 snd_pcm_uframes_t frames;
63 int err;
64
65 if (get_user(frames, src))
66 return -EFAULT;
67 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
68 err = snd_pcm_playback_forward(substream, frames);
69 else
70 err = snd_pcm_capture_forward(substream, frames);
71 if (put_user(err, src))
72 return -EFAULT;
73 return err < 0 ? err : 0;
74}
75
76struct snd_pcm_hw_params32 {
77 u32 flags;
78 struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
79 struct snd_mask mres[5];
80 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
81 struct snd_interval ires[9];
82 u32 rmask;
83 u32 cmask;
84 u32 info;
85 u32 msbits;
86 u32 rate_num;
87 u32 rate_den;
88 u32 fifo_size;
89 unsigned char reserved[64];
90};
91
92struct snd_pcm_sw_params32 {
93 s32 tstamp_mode;
94 u32 period_step;
95 u32 sleep_min;
96 u32 avail_min;
97 u32 xfer_align;
98 u32 start_threshold;
99 u32 stop_threshold;
100 u32 silence_threshold;
101 u32 silence_size;
102 u32 boundary;
103 unsigned char reserved[64];
104};
105
106
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 return -EFAULT;
137
138
139
140
141 boundary = recalculate_boundary(substream->runtime);
142 if (boundary && params.silence_size >= boundary)
143 params.silence_size = substream->runtime->boundary;
144 err = snd_pcm_sw_params(substream, ¶ms);
145 if (err < 0)
146 return err;
147 if (boundary && put_user(boundary, &src->boundary))
148 return -EFAULT;
149 return err;
150}
151
152struct snd_pcm_channel_info32 {
153 u32 channel;
154 u32 offset;
155 u32 first;
156 u32 step;
157};
158
159static int snd_pcm_ioctl_channel_info_compat(struct snd_pcm_substream *substream,
160 struct snd_pcm_channel_info32 __user *src)
161{
162 struct snd_pcm_channel_info info;
163 int err;
164
165 if (get_user(info.channel, &src->channel) ||
166 get_user(info.offset, &src->offset) ||
167 get_user(info.first, &src->first) ||
168 get_user(info.step, &src->step))
169 return -EFAULT;
170 err = snd_pcm_channel_info(substream, &info);
171 if (err < 0)
172 return err;
173 if (put_user(info.channel, &src->channel) ||
174 put_user(info.offset, &src->offset) ||
175 put_user(info.first, &src->first) ||
176 put_user(info.step, &src->step))
177 return -EFAULT;
178 return err;
179}
180
181struct snd_pcm_status32 {
182 s32 state;
183 struct compat_timespec trigger_tstamp;
184 struct compat_timespec tstamp;
185 u32 appl_ptr;
186 u32 hw_ptr;
187 s32 delay;
188 u32 avail;
189 u32 avail_max;
190 u32 overrange;
191 s32 suspended_state;
192 unsigned char reserved[60];
193} __attribute__((packed));
194
195
196static int snd_pcm_status_user_compat(struct snd_pcm_substream *substream,
197 struct snd_pcm_status32 __user *src)
198{
199 struct snd_pcm_status status;
200 int err;
201
202 err = snd_pcm_status(substream, &status);
203 if (err < 0)
204 return err;
205
206 if (put_user(status.state, &src->state) ||
207 put_user(status.trigger_tstamp.tv_sec, &src->trigger_tstamp.tv_sec) ||
208 put_user(status.trigger_tstamp.tv_nsec, &src->trigger_tstamp.tv_nsec) ||
209 put_user(status.tstamp.tv_sec, &src->tstamp.tv_sec) ||
210 put_user(status.tstamp.tv_nsec, &src->tstamp.tv_nsec) ||
211 put_user(status.appl_ptr, &src->appl_ptr) ||
212 put_user(status.hw_ptr, &src->hw_ptr) ||
213 put_user(status.delay, &src->delay) ||
214 put_user(status.avail, &src->avail) ||
215 put_user(status.avail_max, &src->avail_max) ||
216 put_user(status.overrange, &src->overrange) ||
217 put_user(status.suspended_state, &src->suspended_state))
218 return -EFAULT;
219
220 return err;
221}
222
223
224static int snd_pcm_ioctl_hw_params_compat(struct snd_pcm_substream *substream,
225 int refine,
226 struct snd_pcm_hw_params32 __user *data32)
227{
228 struct snd_pcm_hw_params *data;
229 struct snd_pcm_runtime *runtime;
230 int err;
231
232 if (! (runtime = substream->runtime))
233 return -ENOTTY;
234
235 data = kmalloc(sizeof(*data), GFP_KERNEL);
236 if (data == NULL)
237 return -ENOMEM;
238
239 if (copy_from_user(data, data32, sizeof(*data32))) {
240 err = -EFAULT;
241 goto error;
242 }
243 if (refine)
244 err = snd_pcm_hw_refine(substream, data);
245 else
246 err = snd_pcm_hw_params(substream, data);
247 if (err < 0)
248 goto error;
249 if (copy_to_user(data32, data, sizeof(*data32)) ||
250 put_user(data->fifo_size, &data32->fifo_size)) {
251 err = -EFAULT;
252 goto error;
253 }
254
255 if (! refine) {
256 unsigned int new_boundary = recalculate_boundary(runtime);
257 if (new_boundary)
258 runtime->boundary = new_boundary;
259 }
260 error:
261 kfree(data);
262 return err;
263}
264
265
266
267
268struct snd_xferi32 {
269 s32 result;
270 u32 buf;
271 u32 frames;
272};
273
274static int snd_pcm_ioctl_xferi_compat(struct snd_pcm_substream *substream,
275 int dir, struct snd_xferi32 __user *data32)
276{
277 compat_caddr_t buf;
278 u32 frames;
279 int err;
280
281 if (! substream->runtime)
282 return -ENOTTY;
283 if (substream->stream != dir)
284 return -EINVAL;
285 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN)
286 return -EBADFD;
287
288 if (get_user(buf, &data32->buf) ||
289 get_user(frames, &data32->frames))
290 return -EFAULT;
291
292 if (dir == SNDRV_PCM_STREAM_PLAYBACK)
293 err = snd_pcm_lib_write(substream, compat_ptr(buf), frames);
294 else
295 err = snd_pcm_lib_read(substream, compat_ptr(buf), frames);
296 if (err < 0)
297 return err;
298
299 if (put_user(err, &data32->result))
300 return -EFAULT;
301 return 0;
302}
303
304
305
306struct snd_xfern32 {
307 s32 result;
308 u32 bufs;
309 u32 frames;
310};
311
312
313
314
315
316
317
318static int snd_pcm_ioctl_xfern_compat(struct snd_pcm_substream *substream,
319 int dir, struct snd_xfern32 __user *data32)
320{
321 compat_caddr_t buf;
322 compat_caddr_t __user *bufptr;
323 u32 frames;
324 void __user **bufs;
325 int err, ch, i;
326
327 if (! substream->runtime)
328 return -ENOTTY;
329 if (substream->stream != dir)
330 return -EINVAL;
331
332 if ((ch = substream->runtime->channels) > 128)
333 return -EINVAL;
334 if (get_user(buf, &data32->bufs) ||
335 get_user(frames, &data32->frames))
336 return -EFAULT;
337 bufptr = compat_ptr(buf);
338 bufs = kmalloc(sizeof(void __user *) * ch, GFP_KERNEL);
339 if (bufs == NULL)
340 return -ENOMEM;
341 for (i = 0; i < ch; i++) {
342 u32 ptr;
343 if (get_user(ptr, bufptr)) {
344 kfree(bufs);
345 return -EFAULT;
346 }
347 bufs[ch] = compat_ptr(ptr);
348 bufptr++;
349 }
350 if (dir == SNDRV_PCM_STREAM_PLAYBACK)
351 err = snd_pcm_lib_writev(substream, bufs, frames);
352 else
353 err = snd_pcm_lib_readv(substream, bufs, frames);
354 if (err >= 0) {
355 if (put_user(err, &data32->result))
356 err = -EFAULT;
357 }
358 kfree(bufs);
359 return err;
360}
361
362
363struct snd_pcm_mmap_status32 {
364 s32 state;
365 s32 pad1;
366 u32 hw_ptr;
367 struct compat_timespec tstamp;
368 s32 suspended_state;
369} __attribute__((packed));
370
371struct snd_pcm_mmap_control32 {
372 u32 appl_ptr;
373 u32 avail_min;
374};
375
376struct snd_pcm_sync_ptr32 {
377 u32 flags;
378 union {
379 struct snd_pcm_mmap_status32 status;
380 unsigned char reserved[64];
381 } s;
382 union {
383 struct snd_pcm_mmap_control32 control;
384 unsigned char reserved[64];
385 } c;
386} __attribute__((packed));
387
388static int snd_pcm_ioctl_sync_ptr_compat(struct snd_pcm_substream *substream,
389 struct snd_pcm_sync_ptr32 __user *src)
390{
391 struct snd_pcm_runtime *runtime = substream->runtime;
392 volatile struct snd_pcm_mmap_status *status;
393 volatile struct snd_pcm_mmap_control *control;
394 u32 sflags;
395 struct snd_pcm_mmap_control scontrol;
396 struct snd_pcm_mmap_status sstatus;
397 snd_pcm_uframes_t boundary;
398 int err;
399
400 snd_assert(runtime, return -EINVAL);
401
402 if (get_user(sflags, &src->flags) ||
403 get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
404 get_user(scontrol.avail_min, &src->c.control.avail_min))
405 return -EFAULT;
406 if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
407 err = snd_pcm_hwsync(substream);
408 if (err < 0)
409 return err;
410 }
411 status = runtime->status;
412 control = runtime->control;
413 boundary = recalculate_boundary(runtime);
414 if (! boundary)
415 boundary = 0x7fffffff;
416 snd_pcm_stream_lock_irq(substream);
417
418 if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
419 control->appl_ptr = scontrol.appl_ptr;
420 else
421 scontrol.appl_ptr = control->appl_ptr % boundary;
422 if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
423 control->avail_min = scontrol.avail_min;
424 else
425 scontrol.avail_min = control->avail_min;
426 sstatus.state = status->state;
427 sstatus.hw_ptr = status->hw_ptr % boundary;
428 sstatus.tstamp = status->tstamp;
429 sstatus.suspended_state = status->suspended_state;
430 snd_pcm_stream_unlock_irq(substream);
431 if (put_user(sstatus.state, &src->s.status.state) ||
432 put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) ||
433 put_user(sstatus.tstamp.tv_sec, &src->s.status.tstamp.tv_sec) ||
434 put_user(sstatus.tstamp.tv_nsec, &src->s.status.tstamp.tv_nsec) ||
435 put_user(sstatus.suspended_state, &src->s.status.suspended_state) ||
436 put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
437 put_user(scontrol.avail_min, &src->c.control.avail_min))
438 return -EFAULT;
439
440 return 0;
441}
442
443
444
445
446enum {
447 SNDRV_PCM_IOCTL_HW_REFINE32 = _IOWR('A', 0x10, struct snd_pcm_hw_params32),
448 SNDRV_PCM_IOCTL_HW_PARAMS32 = _IOWR('A', 0x11, struct snd_pcm_hw_params32),
449 SNDRV_PCM_IOCTL_SW_PARAMS32 = _IOWR('A', 0x13, struct snd_pcm_sw_params32),
450 SNDRV_PCM_IOCTL_STATUS32 = _IOR('A', 0x20, struct snd_pcm_status32),
451 SNDRV_PCM_IOCTL_DELAY32 = _IOR('A', 0x21, s32),
452 SNDRV_PCM_IOCTL_CHANNEL_INFO32 = _IOR('A', 0x32, struct snd_pcm_channel_info32),
453 SNDRV_PCM_IOCTL_REWIND32 = _IOW('A', 0x46, u32),
454 SNDRV_PCM_IOCTL_FORWARD32 = _IOW('A', 0x49, u32),
455 SNDRV_PCM_IOCTL_WRITEI_FRAMES32 = _IOW('A', 0x50, struct snd_xferi32),
456 SNDRV_PCM_IOCTL_READI_FRAMES32 = _IOR('A', 0x51, struct snd_xferi32),
457 SNDRV_PCM_IOCTL_WRITEN_FRAMES32 = _IOW('A', 0x52, struct snd_xfern32),
458 SNDRV_PCM_IOCTL_READN_FRAMES32 = _IOR('A', 0x53, struct snd_xfern32),
459 SNDRV_PCM_IOCTL_SYNC_PTR32 = _IOWR('A', 0x23, struct snd_pcm_sync_ptr32),
460
461};
462
463static long snd_pcm_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
464{
465 struct snd_pcm_file *pcm_file;
466 struct snd_pcm_substream *substream;
467 void __user *argp = compat_ptr(arg);
468
469 pcm_file = file->private_data;
470 if (! pcm_file)
471 return -ENOTTY;
472 substream = pcm_file->substream;
473 if (! substream)
474 return -ENOTTY;
475
476
477
478
479
480
481 pcm_file->no_compat_mmap = 1;
482
483 switch (cmd) {
484 case SNDRV_PCM_IOCTL_PVERSION:
485 case SNDRV_PCM_IOCTL_INFO:
486 case SNDRV_PCM_IOCTL_TSTAMP:
487 case SNDRV_PCM_IOCTL_TTSTAMP:
488 case SNDRV_PCM_IOCTL_HWSYNC:
489 case SNDRV_PCM_IOCTL_PREPARE:
490 case SNDRV_PCM_IOCTL_RESET:
491 case SNDRV_PCM_IOCTL_START:
492 case SNDRV_PCM_IOCTL_DROP:
493 case SNDRV_PCM_IOCTL_DRAIN:
494 case SNDRV_PCM_IOCTL_PAUSE:
495 case SNDRV_PCM_IOCTL_HW_FREE:
496 case SNDRV_PCM_IOCTL_RESUME:
497 case SNDRV_PCM_IOCTL_XRUN:
498 case SNDRV_PCM_IOCTL_LINK:
499 case SNDRV_PCM_IOCTL_UNLINK:
500 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
501 return snd_pcm_playback_ioctl1(file, substream, cmd, argp);
502 else
503 return snd_pcm_capture_ioctl1(file, substream, cmd, argp);
504 case SNDRV_PCM_IOCTL_HW_REFINE32:
505 return snd_pcm_ioctl_hw_params_compat(substream, 1, argp);
506 case SNDRV_PCM_IOCTL_HW_PARAMS32:
507 return snd_pcm_ioctl_hw_params_compat(substream, 0, argp);
508 case SNDRV_PCM_IOCTL_SW_PARAMS32:
509 return snd_pcm_ioctl_sw_params_compat(substream, argp);
510 case SNDRV_PCM_IOCTL_STATUS32:
511 return snd_pcm_status_user_compat(substream, argp);
512 case SNDRV_PCM_IOCTL_SYNC_PTR32:
513 return snd_pcm_ioctl_sync_ptr_compat(substream, argp);
514 case SNDRV_PCM_IOCTL_CHANNEL_INFO32:
515 return snd_pcm_ioctl_channel_info_compat(substream, argp);
516 case SNDRV_PCM_IOCTL_WRITEI_FRAMES32:
517 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
518 case SNDRV_PCM_IOCTL_READI_FRAMES32:
519 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
520 case SNDRV_PCM_IOCTL_WRITEN_FRAMES32:
521 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
522 case SNDRV_PCM_IOCTL_READN_FRAMES32:
523 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
524 case SNDRV_PCM_IOCTL_DELAY32:
525 return snd_pcm_ioctl_delay_compat(substream, argp);
526 case SNDRV_PCM_IOCTL_REWIND32:
527 return snd_pcm_ioctl_rewind_compat(substream, argp);
528 case SNDRV_PCM_IOCTL_FORWARD32:
529 return snd_pcm_ioctl_forward_compat(substream, argp);
530 }
531
532 return -ENOIOCTLCMD;
533}
534
