2 * compat ioctls for control API
4 * Copyright (c) by Takashi Iwai <tiwai@suse.de>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 /* this file included from control.c */
23 #include <linux/compat.h>
25 struct snd_ctl_elem_list32 {
31 unsigned char reserved[50];
32 } /* don't set packed attribute here */;
34 static int snd_ctl_elem_list_compat(struct snd_card *card,
35 struct snd_ctl_elem_list32 __user *data32)
37 struct snd_ctl_elem_list __user *data;
41 data = compat_alloc_user_space(sizeof(*data));
43 /* offset, space, used, count */
44 if (copy_in_user(data, data32, 4 * sizeof(u32)))
47 if (get_user(ptr, &data32->pids) ||
48 put_user(compat_ptr(ptr), &data->pids))
50 err = snd_ctl_elem_list(card, data);
54 if (copy_in_user(data32, data, 4 * sizeof(u32)))
60 * control element info
61 * it uses union, so the things are not easy..
64 struct snd_ctl_elem_info32 {
65 struct snd_ctl_elem_id id; // the size of struct is same
86 unsigned char reserved[128];
88 unsigned char reserved[64];
89 } __attribute__((packed));
91 static int snd_ctl_elem_info_compat(struct snd_ctl_file *ctl,
92 struct snd_ctl_elem_info32 __user *data32)
94 struct snd_ctl_elem_info *data;
97 data = kzalloc(sizeof(*data), GFP_KERNEL);
103 if (copy_from_user(&data->id, &data32->id, sizeof(data->id)))
105 /* we need to copy the item index.
106 * hope this doesn't break anything..
108 if (get_user(data->value.enumerated.item, &data32->value.enumerated.item))
110 err = snd_ctl_elem_info(ctl, data);
113 /* restore info to 32bit */
115 /* id, type, access, count */
116 if (copy_to_user(&data32->id, &data->id, sizeof(data->id)) ||
117 copy_to_user(&data32->type, &data->type, 3 * sizeof(u32)))
119 if (put_user(data->owner, &data32->owner))
121 switch (data->type) {
122 case SNDRV_CTL_ELEM_TYPE_BOOLEAN:
123 case SNDRV_CTL_ELEM_TYPE_INTEGER:
124 if (put_user(data->value.integer.min, &data32->value.integer.min) ||
125 put_user(data->value.integer.max, &data32->value.integer.max) ||
126 put_user(data->value.integer.step, &data32->value.integer.step))
129 case SNDRV_CTL_ELEM_TYPE_INTEGER64:
130 if (copy_to_user(&data32->value.integer64,
131 &data->value.integer64,
132 sizeof(data->value.integer64)))
135 case SNDRV_CTL_ELEM_TYPE_ENUMERATED:
136 if (copy_to_user(&data32->value.enumerated,
137 &data->value.enumerated,
138 sizeof(data->value.enumerated)))
151 struct snd_ctl_elem_value32 {
152 struct snd_ctl_elem_id id;
153 unsigned int indirect; /* bit-field causes misalignment */
156 unsigned char data[512];
157 #ifndef CONFIG_X86_64
161 unsigned char reserved[128];
165 /* get the value type and count of the control */
166 static int get_ctl_type(struct snd_card *card, struct snd_ctl_elem_id *id,
169 struct snd_kcontrol *kctl;
170 struct snd_ctl_elem_info info;
173 down_read(&card->controls_rwsem);
174 kctl = snd_ctl_find_id(card, id);
176 up_read(&card->controls_rwsem);
180 err = kctl->info(kctl, &info);
181 up_read(&card->controls_rwsem);
184 *countp = info.count;
189 static int get_elem_size(int type, int count)
192 case SNDRV_CTL_ELEM_TYPE_INTEGER64:
193 return sizeof(s64) * count;
194 case SNDRV_CTL_ELEM_TYPE_ENUMERATED:
195 return sizeof(int) * count;
196 case SNDRV_CTL_ELEM_TYPE_BYTES:
198 case SNDRV_CTL_ELEM_TYPE_IEC958:
199 return sizeof(struct snd_aes_iec958);
205 static int copy_ctl_value_from_user(struct snd_card *card,
206 struct snd_ctl_elem_value *data,
207 struct snd_ctl_elem_value32 __user *data32,
208 int *typep, int *countp)
210 int i, type, count, size;
211 unsigned int indirect;
213 if (copy_from_user(&data->id, &data32->id, sizeof(data->id)))
215 if (get_user(indirect, &data32->indirect))
219 type = get_ctl_type(card, &data->id, &count);
223 if (type == SNDRV_CTL_ELEM_TYPE_BOOLEAN ||
224 type == SNDRV_CTL_ELEM_TYPE_INTEGER) {
225 for (i = 0; i < count; i++) {
227 if (get_user(val, &data32->value.integer[i]))
229 data->value.integer.value[i] = val;
232 size = get_elem_size(type, count);
234 printk(KERN_ERR "snd_ioctl32_ctl_elem_value: unknown type %d\n", type);
237 if (copy_from_user(data->value.bytes.data,
238 data32->value.data, size))
247 /* restore the value to 32bit */
248 static int copy_ctl_value_to_user(struct snd_ctl_elem_value32 __user *data32,
249 struct snd_ctl_elem_value *data,
254 if (type == SNDRV_CTL_ELEM_TYPE_BOOLEAN ||
255 type == SNDRV_CTL_ELEM_TYPE_INTEGER) {
256 for (i = 0; i < count; i++) {
258 val = data->value.integer.value[i];
259 if (put_user(val, &data32->value.integer[i]))
263 size = get_elem_size(type, count);
264 if (copy_to_user(data32->value.data,
265 data->value.bytes.data, size))
271 static int snd_ctl_elem_read_user_compat(struct snd_card *card,
272 struct snd_ctl_elem_value32 __user *data32)
274 struct snd_ctl_elem_value *data;
275 int err, type, count;
277 data = kzalloc(sizeof(*data), GFP_KERNEL);
281 if ((err = copy_ctl_value_from_user(card, data, data32, &type, &count)) < 0)
283 if ((err = snd_ctl_elem_read(card, data)) < 0)
285 err = copy_ctl_value_to_user(data32, data, type, count);
291 static int snd_ctl_elem_write_user_compat(struct snd_ctl_file *file,
292 struct snd_ctl_elem_value32 __user *data32)
294 struct snd_ctl_elem_value *data;
295 int err, type, count;
297 data = kzalloc(sizeof(*data), GFP_KERNEL);
301 if ((err = copy_ctl_value_from_user(file->card, data, data32, &type, &count)) < 0)
303 if ((err = snd_ctl_elem_write(file->card, file, data)) < 0)
305 err = copy_ctl_value_to_user(data32, data, type, count);
311 /* add or replace a user control */
312 static int snd_ctl_elem_add_compat(struct snd_ctl_file *file,
313 struct snd_ctl_elem_info32 __user *data32,
316 struct snd_ctl_elem_info *data;
319 data = kzalloc(sizeof(*data), GFP_KERNEL);
324 /* id, type, access, count */ \
325 if (copy_from_user(&data->id, &data32->id, sizeof(data->id)) ||
326 copy_from_user(&data->type, &data32->type, 3 * sizeof(u32)))
328 if (get_user(data->owner, &data32->owner) ||
329 get_user(data->type, &data32->type))
331 switch (data->type) {
332 case SNDRV_CTL_ELEM_TYPE_BOOLEAN:
333 case SNDRV_CTL_ELEM_TYPE_INTEGER:
334 if (get_user(data->value.integer.min, &data32->value.integer.min) ||
335 get_user(data->value.integer.max, &data32->value.integer.max) ||
336 get_user(data->value.integer.step, &data32->value.integer.step))
339 case SNDRV_CTL_ELEM_TYPE_INTEGER64:
340 if (copy_from_user(&data->value.integer64,
341 &data32->value.integer64,
342 sizeof(data->value.integer64)))
345 case SNDRV_CTL_ELEM_TYPE_ENUMERATED:
346 if (copy_from_user(&data->value.enumerated,
347 &data32->value.enumerated,
348 sizeof(data->value.enumerated)))
354 err = snd_ctl_elem_add(file, data, replace);
361 SNDRV_CTL_IOCTL_ELEM_LIST32 = _IOWR('U', 0x10, struct snd_ctl_elem_list32),
362 SNDRV_CTL_IOCTL_ELEM_INFO32 = _IOWR('U', 0x11, struct snd_ctl_elem_info32),
363 SNDRV_CTL_IOCTL_ELEM_READ32 = _IOWR('U', 0x12, struct snd_ctl_elem_value32),
364 SNDRV_CTL_IOCTL_ELEM_WRITE32 = _IOWR('U', 0x13, struct snd_ctl_elem_value32),
365 SNDRV_CTL_IOCTL_ELEM_ADD32 = _IOWR('U', 0x17, struct snd_ctl_elem_info32),
366 SNDRV_CTL_IOCTL_ELEM_REPLACE32 = _IOWR('U', 0x18, struct snd_ctl_elem_info32),
369 static inline long snd_ctl_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
371 struct snd_ctl_file *ctl;
372 struct list_head *list;
373 void __user *argp = compat_ptr(arg);
376 ctl = file->private_data;
377 snd_assert(ctl && ctl->card, return -ENXIO);
380 case SNDRV_CTL_IOCTL_PVERSION:
381 case SNDRV_CTL_IOCTL_CARD_INFO:
382 case SNDRV_CTL_IOCTL_SUBSCRIBE_EVENTS:
383 case SNDRV_CTL_IOCTL_POWER:
384 case SNDRV_CTL_IOCTL_POWER_STATE:
385 case SNDRV_CTL_IOCTL_ELEM_LOCK:
386 case SNDRV_CTL_IOCTL_ELEM_UNLOCK:
387 return snd_ctl_ioctl(file, cmd, (unsigned long)argp);
388 case SNDRV_CTL_IOCTL_ELEM_LIST32:
389 return snd_ctl_elem_list_compat(ctl->card, argp);
390 case SNDRV_CTL_IOCTL_ELEM_INFO32:
391 return snd_ctl_elem_info_compat(ctl, argp);
392 case SNDRV_CTL_IOCTL_ELEM_READ32:
393 return snd_ctl_elem_read_user_compat(ctl->card, argp);
394 case SNDRV_CTL_IOCTL_ELEM_WRITE32:
395 return snd_ctl_elem_write_user_compat(ctl, argp);
396 case SNDRV_CTL_IOCTL_ELEM_ADD32:
397 return snd_ctl_elem_add_compat(ctl, argp, 0);
398 case SNDRV_CTL_IOCTL_ELEM_REPLACE32:
399 return snd_ctl_elem_add_compat(ctl, argp, 1);
402 down_read(&snd_ioctl_rwsem);
403 list_for_each(list, &snd_control_compat_ioctls) {
404 struct snd_kctl_ioctl *p = list_entry(list, struct snd_kctl_ioctl, list);
406 err = p->fioctl(ctl->card, ctl, cmd, arg);
407 if (err != -ENOIOCTLCMD) {
408 up_read(&snd_ioctl_rwsem);
413 up_read(&snd_ioctl_rwsem);