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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 | |
26 | static 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 | |
43 | static 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 | |
60 | static 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 | |
77 | struct 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 | |
93 | struct 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 */ |
108 | static 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 | |
120 | static 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 | |
153 | struct snd_pcm_channel_info32 { |
154 | u32 channel; |
155 | u32 offset; |
156 | u32 first; |
157 | u32 step; |
158 | }; |
159 | |
160 | static 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 | |
182 | struct 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 | u32 reserved_alignment; |
194 | struct compat_timespec audio_tstamp; |
195 | unsigned char reserved[56-sizeof(struct compat_timespec)]; |
196 | } __attribute__((packed)); |
197 | |
198 | |
199 | static int snd_pcm_status_user_compat(struct snd_pcm_substream *substream, |
200 | struct snd_pcm_status32 __user *src) |
201 | { |
202 | struct snd_pcm_status status; |
203 | int err; |
204 | |
205 | err = snd_pcm_status(substream, &status); |
206 | if (err < 0) |
207 | return err; |
208 | |
209 | if (put_user(status.state, &src->state) || |
210 | compat_put_timespec(&status.trigger_tstamp, &src->trigger_tstamp) || |
211 | compat_put_timespec(&status.tstamp, &src->tstamp) || |
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 | compat_put_timespec(&status.audio_tstamp, &src->audio_tstamp)) |
220 | return -EFAULT; |
221 | |
222 | return err; |
223 | } |
224 | |
225 | /* both for HW_PARAMS and HW_REFINE */ |
226 | static int snd_pcm_ioctl_hw_params_compat(struct snd_pcm_substream *substream, |
227 | int refine, |
228 | struct snd_pcm_hw_params32 __user *data32) |
229 | { |
230 | struct snd_pcm_hw_params *data; |
231 | struct snd_pcm_runtime *runtime; |
232 | int err; |
233 | |
234 | if (! (runtime = substream->runtime)) |
235 | return -ENOTTY; |
236 | |
237 | /* only fifo_size is different, so just copy all */ |
238 | data = memdup_user(data32, sizeof(*data32)); |
239 | if (IS_ERR(data)) |
240 | return PTR_ERR(data); |
241 | |
242 | if (refine) |
243 | err = snd_pcm_hw_refine(substream, data); |
244 | else |
245 | err = snd_pcm_hw_params(substream, data); |
246 | if (err < 0) |
247 | goto error; |
248 | if (copy_to_user(data32, data, sizeof(*data32)) || |
249 | put_user(data->fifo_size, &data32->fifo_size)) { |
250 | err = -EFAULT; |
251 | goto error; |
252 | } |
253 | |
254 | if (! refine) { |
255 | unsigned int new_boundary = recalculate_boundary(runtime); |
256 | if (new_boundary) |
257 | runtime->boundary = new_boundary; |
258 | } |
259 | error: |
260 | kfree(data); |
261 | return err; |
262 | } |
263 | |
264 | |
265 | /* |
266 | */ |
267 | struct snd_xferi32 { |
268 | s32 result; |
269 | u32 buf; |
270 | u32 frames; |
271 | }; |
272 | |
273 | static int snd_pcm_ioctl_xferi_compat(struct snd_pcm_substream *substream, |
274 | int dir, struct snd_xferi32 __user *data32) |
275 | { |
276 | compat_caddr_t buf; |
277 | u32 frames; |
278 | int err; |
279 | |
280 | if (! substream->runtime) |
281 | return -ENOTTY; |
282 | if (substream->stream != dir) |
283 | return -EINVAL; |
284 | if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) |
285 | return -EBADFD; |
286 | |
287 | if (get_user(buf, &data32->buf) || |
288 | get_user(frames, &data32->frames)) |
289 | return -EFAULT; |
290 | |
291 | if (dir == SNDRV_PCM_STREAM_PLAYBACK) |
292 | err = snd_pcm_lib_write(substream, compat_ptr(buf), frames); |
293 | else |
294 | err = snd_pcm_lib_read(substream, compat_ptr(buf), frames); |
295 | if (err < 0) |
296 | return err; |
297 | /* copy the result */ |
298 | if (put_user(err, &data32->result)) |
299 | return -EFAULT; |
300 | return 0; |
301 | } |
302 | |
303 | |
304 | /* snd_xfern needs remapping of bufs */ |
305 | struct snd_xfern32 { |
306 | s32 result; |
307 | u32 bufs; /* this is void **; */ |
308 | u32 frames; |
309 | }; |
310 | |
311 | /* |
312 | * xfern ioctl nees to copy (up to) 128 pointers on stack. |
313 | * although we may pass the copied pointers through f_op->ioctl, but the ioctl |
314 | * handler there expands again the same 128 pointers on stack, so it is better |
315 | * to handle the function (calling pcm_readv/writev) directly in this handler. |
316 | */ |
317 | static int snd_pcm_ioctl_xfern_compat(struct snd_pcm_substream *substream, |
318 | int dir, struct snd_xfern32 __user *data32) |
319 | { |
320 | compat_caddr_t buf; |
321 | compat_caddr_t __user *bufptr; |
322 | u32 frames; |
323 | void __user **bufs; |
324 | int err, ch, i; |
325 | |
326 | if (! substream->runtime) |
327 | return -ENOTTY; |
328 | if (substream->stream != dir) |
329 | return -EINVAL; |
330 | |
331 | if ((ch = substream->runtime->channels) > 128) |
332 | return -EINVAL; |
333 | if (get_user(buf, &data32->bufs) || |
334 | get_user(frames, &data32->frames)) |
335 | return -EFAULT; |
336 | bufptr = compat_ptr(buf); |
337 | bufs = kmalloc(sizeof(void __user *) * ch, GFP_KERNEL); |
338 | if (bufs == NULL) |
339 | return -ENOMEM; |
340 | for (i = 0; i < ch; i++) { |
341 | u32 ptr; |
342 | if (get_user(ptr, bufptr)) { |
343 | kfree(bufs); |
344 | return -EFAULT; |
345 | } |
346 | bufs[i] = compat_ptr(ptr); |
347 | bufptr++; |
348 | } |
349 | if (dir == SNDRV_PCM_STREAM_PLAYBACK) |
350 | err = snd_pcm_lib_writev(substream, bufs, frames); |
351 | else |
352 | err = snd_pcm_lib_readv(substream, bufs, frames); |
353 | if (err >= 0) { |
354 | if (put_user(err, &data32->result)) |
355 | err = -EFAULT; |
356 | } |
357 | kfree(bufs); |
358 | return err; |
359 | } |
360 | |
361 | |
362 | struct snd_pcm_mmap_status32 { |
363 | s32 state; |
364 | s32 pad1; |
365 | u32 hw_ptr; |
366 | struct compat_timespec tstamp; |
367 | s32 suspended_state; |
368 | struct compat_timespec audio_tstamp; |
369 | } __attribute__((packed)); |
370 | |
371 | struct snd_pcm_mmap_control32 { |
372 | u32 appl_ptr; |
373 | u32 avail_min; |
374 | }; |
375 | |
376 | struct 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 | |
388 | static 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 | if (snd_BUG_ON(!runtime)) |
401 | return -EINVAL; |
402 | |
403 | if (get_user(sflags, &src->flags) || |
404 | get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) || |
405 | get_user(scontrol.avail_min, &src->c.control.avail_min)) |
406 | return -EFAULT; |
407 | if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) { |
408 | err = snd_pcm_hwsync(substream); |
409 | if (err < 0) |
410 | return err; |
411 | } |
412 | status = runtime->status; |
413 | control = runtime->control; |
414 | boundary = recalculate_boundary(runtime); |
415 | if (! boundary) |
416 | boundary = 0x7fffffff; |
417 | snd_pcm_stream_lock_irq(substream); |
418 | /* FIXME: we should consider the boundary for the sync from app */ |
419 | if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL)) |
420 | control->appl_ptr = scontrol.appl_ptr; |
421 | else |
422 | scontrol.appl_ptr = control->appl_ptr % boundary; |
423 | if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) |
424 | control->avail_min = scontrol.avail_min; |
425 | else |
426 | scontrol.avail_min = control->avail_min; |
427 | sstatus.state = status->state; |
428 | sstatus.hw_ptr = status->hw_ptr % boundary; |
429 | sstatus.tstamp = status->tstamp; |
430 | sstatus.suspended_state = status->suspended_state; |
431 | sstatus.audio_tstamp = status->audio_tstamp; |
432 | snd_pcm_stream_unlock_irq(substream); |
433 | if (put_user(sstatus.state, &src->s.status.state) || |
434 | put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) || |
435 | compat_put_timespec(&sstatus.tstamp, &src->s.status.tstamp) || |
436 | put_user(sstatus.suspended_state, &src->s.status.suspended_state) || |
437 | compat_put_timespec(&sstatus.audio_tstamp, |
438 | &src->s.status.audio_tstamp) || |
439 | put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) || |
440 | put_user(scontrol.avail_min, &src->c.control.avail_min)) |
441 | return -EFAULT; |
442 | |
443 | return 0; |
444 | } |
445 | |
446 | |
447 | /* |
448 | */ |
449 | enum { |
450 | SNDRV_PCM_IOCTL_HW_REFINE32 = _IOWR('A', 0x10, struct snd_pcm_hw_params32), |
451 | SNDRV_PCM_IOCTL_HW_PARAMS32 = _IOWR('A', 0x11, struct snd_pcm_hw_params32), |
452 | SNDRV_PCM_IOCTL_SW_PARAMS32 = _IOWR('A', 0x13, struct snd_pcm_sw_params32), |
453 | SNDRV_PCM_IOCTL_STATUS32 = _IOR('A', 0x20, struct snd_pcm_status32), |
454 | SNDRV_PCM_IOCTL_DELAY32 = _IOR('A', 0x21, s32), |
455 | SNDRV_PCM_IOCTL_CHANNEL_INFO32 = _IOR('A', 0x32, struct snd_pcm_channel_info32), |
456 | SNDRV_PCM_IOCTL_REWIND32 = _IOW('A', 0x46, u32), |
457 | SNDRV_PCM_IOCTL_FORWARD32 = _IOW('A', 0x49, u32), |
458 | SNDRV_PCM_IOCTL_WRITEI_FRAMES32 = _IOW('A', 0x50, struct snd_xferi32), |
459 | SNDRV_PCM_IOCTL_READI_FRAMES32 = _IOR('A', 0x51, struct snd_xferi32), |
460 | SNDRV_PCM_IOCTL_WRITEN_FRAMES32 = _IOW('A', 0x52, struct snd_xfern32), |
461 | SNDRV_PCM_IOCTL_READN_FRAMES32 = _IOR('A', 0x53, struct snd_xfern32), |
462 | SNDRV_PCM_IOCTL_SYNC_PTR32 = _IOWR('A', 0x23, struct snd_pcm_sync_ptr32), |
463 | |
464 | }; |
465 | |
466 | static long snd_pcm_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg) |
467 | { |
468 | struct snd_pcm_file *pcm_file; |
469 | struct snd_pcm_substream *substream; |
470 | void __user *argp = compat_ptr(arg); |
471 | |
472 | pcm_file = file->private_data; |
473 | if (! pcm_file) |
474 | return -ENOTTY; |
475 | substream = pcm_file->substream; |
476 | if (! substream) |
477 | return -ENOTTY; |
478 | |
479 | /* |
480 | * When PCM is used on 32bit mode, we need to disable |
481 | * mmap of PCM status/control records because of the size |
482 | * incompatibility. |
483 | */ |
484 | pcm_file->no_compat_mmap = 1; |
485 | |
486 | switch (cmd) { |
487 | case SNDRV_PCM_IOCTL_PVERSION: |
488 | case SNDRV_PCM_IOCTL_INFO: |
489 | case SNDRV_PCM_IOCTL_TSTAMP: |
490 | case SNDRV_PCM_IOCTL_TTSTAMP: |
491 | case SNDRV_PCM_IOCTL_HWSYNC: |
492 | case SNDRV_PCM_IOCTL_PREPARE: |
493 | case SNDRV_PCM_IOCTL_RESET: |
494 | case SNDRV_PCM_IOCTL_START: |
495 | case SNDRV_PCM_IOCTL_DROP: |
496 | case SNDRV_PCM_IOCTL_DRAIN: |
497 | case SNDRV_PCM_IOCTL_PAUSE: |
498 | case SNDRV_PCM_IOCTL_HW_FREE: |
499 | case SNDRV_PCM_IOCTL_RESUME: |
500 | case SNDRV_PCM_IOCTL_XRUN: |
501 | case SNDRV_PCM_IOCTL_LINK: |
502 | case SNDRV_PCM_IOCTL_UNLINK: |
503 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
504 | return snd_pcm_playback_ioctl1(file, substream, cmd, argp); |
505 | else |
506 | return snd_pcm_capture_ioctl1(file, substream, cmd, argp); |
507 | case SNDRV_PCM_IOCTL_HW_REFINE32: |
508 | return snd_pcm_ioctl_hw_params_compat(substream, 1, argp); |
509 | case SNDRV_PCM_IOCTL_HW_PARAMS32: |
510 | return snd_pcm_ioctl_hw_params_compat(substream, 0, argp); |
511 | case SNDRV_PCM_IOCTL_SW_PARAMS32: |
512 | return snd_pcm_ioctl_sw_params_compat(substream, argp); |
513 | case SNDRV_PCM_IOCTL_STATUS32: |
514 | return snd_pcm_status_user_compat(substream, argp); |
515 | case SNDRV_PCM_IOCTL_SYNC_PTR32: |
516 | return snd_pcm_ioctl_sync_ptr_compat(substream, argp); |
517 | case SNDRV_PCM_IOCTL_CHANNEL_INFO32: |
518 | return snd_pcm_ioctl_channel_info_compat(substream, argp); |
519 | case SNDRV_PCM_IOCTL_WRITEI_FRAMES32: |
520 | return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp); |
521 | case SNDRV_PCM_IOCTL_READI_FRAMES32: |
522 | return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp); |
523 | case SNDRV_PCM_IOCTL_WRITEN_FRAMES32: |
524 | return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp); |
525 | case SNDRV_PCM_IOCTL_READN_FRAMES32: |
526 | return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp); |
527 | case SNDRV_PCM_IOCTL_DELAY32: |
528 | return snd_pcm_ioctl_delay_compat(substream, argp); |
529 | case SNDRV_PCM_IOCTL_REWIND32: |
530 | return snd_pcm_ioctl_rewind_compat(substream, argp); |
531 | case SNDRV_PCM_IOCTL_FORWARD32: |
532 | return snd_pcm_ioctl_forward_compat(substream, argp); |
533 | } |
534 | |
535 | return -ENOIOCTLCMD; |
536 | } |
537 |
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