Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * ALSA sequencer Client Manager | |
3 | * Copyright (c) 1998-2001 by Frank van de Pol <fvdpol@coil.demon.nl> | |
c1017a4c | 4 | * Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
5 | * Takashi Iwai <tiwai@suse.de> |
6 | * | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | * | |
22 | */ | |
23 | ||
1da177e4 | 24 | #include <linux/init.h> |
d81a6d71 | 25 | #include <linux/export.h> |
1da177e4 LT |
26 | #include <linux/slab.h> |
27 | #include <sound/core.h> | |
28 | #include <sound/minors.h> | |
29 | #include <linux/kmod.h> | |
30 | ||
31 | #include <sound/seq_kernel.h> | |
32 | #include "seq_clientmgr.h" | |
33 | #include "seq_memory.h" | |
34 | #include "seq_queue.h" | |
35 | #include "seq_timer.h" | |
36 | #include "seq_info.h" | |
37 | #include "seq_system.h" | |
38 | #include <sound/seq_device.h> | |
39 | #ifdef CONFIG_COMPAT | |
40 | #include <linux/compat.h> | |
41 | #endif | |
42 | ||
43 | /* Client Manager | |
44 | ||
45 | * this module handles the connections of userland and kernel clients | |
46 | * | |
47 | */ | |
48 | ||
aa1e77e6 CL |
49 | /* |
50 | * There are four ranges of client numbers (last two shared): | |
51 | * 0..15: global clients | |
52 | * 16..127: statically allocated client numbers for cards 0..27 | |
53 | * 128..191: dynamically allocated client numbers for cards 28..31 | |
54 | * 128..191: dynamically allocated client numbers for applications | |
55 | */ | |
56 | ||
57 | /* number of kernel non-card clients */ | |
58 | #define SNDRV_SEQ_GLOBAL_CLIENTS 16 | |
59 | /* clients per cards, for static clients */ | |
60 | #define SNDRV_SEQ_CLIENTS_PER_CARD 4 | |
61 | /* dynamically allocated client numbers (both kernel drivers and user space) */ | |
62 | #define SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN 128 | |
d001544d | 63 | |
1da177e4 LT |
64 | #define SNDRV_SEQ_LFLG_INPUT 0x0001 |
65 | #define SNDRV_SEQ_LFLG_OUTPUT 0x0002 | |
66 | #define SNDRV_SEQ_LFLG_OPEN (SNDRV_SEQ_LFLG_INPUT|SNDRV_SEQ_LFLG_OUTPUT) | |
67 | ||
68 | static DEFINE_SPINLOCK(clients_lock); | |
1a60d4c5 | 69 | static DEFINE_MUTEX(register_mutex); |
1da177e4 LT |
70 | |
71 | /* | |
72 | * client table | |
73 | */ | |
74 | static char clienttablock[SNDRV_SEQ_MAX_CLIENTS]; | |
c7e0b5bf TI |
75 | static struct snd_seq_client *clienttab[SNDRV_SEQ_MAX_CLIENTS]; |
76 | static struct snd_seq_usage client_usage; | |
1da177e4 LT |
77 | |
78 | /* | |
79 | * prototypes | |
80 | */ | |
c7e0b5bf TI |
81 | static int bounce_error_event(struct snd_seq_client *client, |
82 | struct snd_seq_event *event, | |
83 | int err, int atomic, int hop); | |
84 | static int snd_seq_deliver_single_event(struct snd_seq_client *client, | |
85 | struct snd_seq_event *event, | |
86 | int filter, int atomic, int hop); | |
1da177e4 LT |
87 | |
88 | /* | |
89 | */ | |
90 | ||
91 | static inline mm_segment_t snd_enter_user(void) | |
92 | { | |
93 | mm_segment_t fs = get_fs(); | |
94 | set_fs(get_ds()); | |
95 | return fs; | |
96 | } | |
97 | ||
98 | static inline void snd_leave_user(mm_segment_t fs) | |
99 | { | |
100 | set_fs(fs); | |
101 | } | |
102 | ||
103 | /* | |
104 | */ | |
105 | static inline unsigned short snd_seq_file_flags(struct file *file) | |
106 | { | |
107 | switch (file->f_mode & (FMODE_READ | FMODE_WRITE)) { | |
108 | case FMODE_WRITE: | |
109 | return SNDRV_SEQ_LFLG_OUTPUT; | |
110 | case FMODE_READ: | |
111 | return SNDRV_SEQ_LFLG_INPUT; | |
112 | default: | |
113 | return SNDRV_SEQ_LFLG_OPEN; | |
114 | } | |
115 | } | |
116 | ||
c7e0b5bf | 117 | static inline int snd_seq_write_pool_allocated(struct snd_seq_client *client) |
1da177e4 LT |
118 | { |
119 | return snd_seq_total_cells(client->pool) > 0; | |
120 | } | |
121 | ||
122 | /* return pointer to client structure for specified id */ | |
c7e0b5bf | 123 | static struct snd_seq_client *clientptr(int clientid) |
1da177e4 LT |
124 | { |
125 | if (clientid < 0 || clientid >= SNDRV_SEQ_MAX_CLIENTS) { | |
c7e0b5bf TI |
126 | snd_printd("Seq: oops. Trying to get pointer to client %d\n", |
127 | clientid); | |
1da177e4 LT |
128 | return NULL; |
129 | } | |
130 | return clienttab[clientid]; | |
131 | } | |
132 | ||
c7e0b5bf | 133 | struct snd_seq_client *snd_seq_client_use_ptr(int clientid) |
1da177e4 LT |
134 | { |
135 | unsigned long flags; | |
c7e0b5bf | 136 | struct snd_seq_client *client; |
1da177e4 LT |
137 | |
138 | if (clientid < 0 || clientid >= SNDRV_SEQ_MAX_CLIENTS) { | |
c7e0b5bf TI |
139 | snd_printd("Seq: oops. Trying to get pointer to client %d\n", |
140 | clientid); | |
1da177e4 LT |
141 | return NULL; |
142 | } | |
143 | spin_lock_irqsave(&clients_lock, flags); | |
144 | client = clientptr(clientid); | |
145 | if (client) | |
146 | goto __lock; | |
147 | if (clienttablock[clientid]) { | |
148 | spin_unlock_irqrestore(&clients_lock, flags); | |
149 | return NULL; | |
150 | } | |
151 | spin_unlock_irqrestore(&clients_lock, flags); | |
ee2da997 | 152 | #ifdef CONFIG_MODULES |
0d63e4f9 | 153 | if (!in_interrupt()) { |
aa1e77e6 | 154 | static char client_requested[SNDRV_SEQ_GLOBAL_CLIENTS]; |
1da177e4 | 155 | static char card_requested[SNDRV_CARDS]; |
aa1e77e6 | 156 | if (clientid < SNDRV_SEQ_GLOBAL_CLIENTS) { |
1da177e4 LT |
157 | int idx; |
158 | ||
0d63e4f9 | 159 | if (!client_requested[clientid]) { |
1da177e4 | 160 | client_requested[clientid] = 1; |
aa1e77e6 | 161 | for (idx = 0; idx < 15; idx++) { |
1da177e4 LT |
162 | if (seq_client_load[idx] < 0) |
163 | break; | |
164 | if (seq_client_load[idx] == clientid) { | |
c7e0b5bf TI |
165 | request_module("snd-seq-client-%i", |
166 | clientid); | |
1da177e4 LT |
167 | break; |
168 | } | |
169 | } | |
170 | } | |
aa1e77e6 CL |
171 | } else if (clientid < SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN) { |
172 | int card = (clientid - SNDRV_SEQ_GLOBAL_CLIENTS) / | |
173 | SNDRV_SEQ_CLIENTS_PER_CARD; | |
1da177e4 LT |
174 | if (card < snd_ecards_limit) { |
175 | if (! card_requested[card]) { | |
176 | card_requested[card] = 1; | |
177 | snd_request_card(card); | |
178 | } | |
179 | snd_seq_device_load_drivers(); | |
180 | } | |
181 | } | |
182 | spin_lock_irqsave(&clients_lock, flags); | |
183 | client = clientptr(clientid); | |
184 | if (client) | |
185 | goto __lock; | |
186 | spin_unlock_irqrestore(&clients_lock, flags); | |
187 | } | |
188 | #endif | |
189 | return NULL; | |
190 | ||
191 | __lock: | |
192 | snd_use_lock_use(&client->use_lock); | |
193 | spin_unlock_irqrestore(&clients_lock, flags); | |
194 | return client; | |
195 | } | |
196 | ||
c7e0b5bf | 197 | static void usage_alloc(struct snd_seq_usage *res, int num) |
1da177e4 LT |
198 | { |
199 | res->cur += num; | |
200 | if (res->cur > res->peak) | |
201 | res->peak = res->cur; | |
202 | } | |
203 | ||
c7e0b5bf | 204 | static void usage_free(struct snd_seq_usage *res, int num) |
1da177e4 LT |
205 | { |
206 | res->cur -= num; | |
207 | } | |
208 | ||
209 | /* initialise data structures */ | |
210 | int __init client_init_data(void) | |
211 | { | |
212 | /* zap out the client table */ | |
213 | memset(&clienttablock, 0, sizeof(clienttablock)); | |
214 | memset(&clienttab, 0, sizeof(clienttab)); | |
215 | return 0; | |
216 | } | |
217 | ||
218 | ||
aa1e77e6 | 219 | static struct snd_seq_client *seq_create_client1(int client_index, int poolsize) |
1da177e4 LT |
220 | { |
221 | unsigned long flags; | |
222 | int c; | |
c7e0b5bf | 223 | struct snd_seq_client *client; |
1da177e4 LT |
224 | |
225 | /* init client data */ | |
ecca82b4 | 226 | client = kzalloc(sizeof(*client), GFP_KERNEL); |
1da177e4 LT |
227 | if (client == NULL) |
228 | return NULL; | |
229 | client->pool = snd_seq_pool_new(poolsize); | |
230 | if (client->pool == NULL) { | |
231 | kfree(client); | |
232 | return NULL; | |
233 | } | |
234 | client->type = NO_CLIENT; | |
235 | snd_use_lock_init(&client->use_lock); | |
236 | rwlock_init(&client->ports_lock); | |
1a60d4c5 | 237 | mutex_init(&client->ports_mutex); |
1da177e4 LT |
238 | INIT_LIST_HEAD(&client->ports_list_head); |
239 | ||
240 | /* find free slot in the client table */ | |
241 | spin_lock_irqsave(&clients_lock, flags); | |
242 | if (client_index < 0) { | |
aa1e77e6 CL |
243 | for (c = SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN; |
244 | c < SNDRV_SEQ_MAX_CLIENTS; | |
245 | c++) { | |
1da177e4 LT |
246 | if (clienttab[c] || clienttablock[c]) |
247 | continue; | |
248 | clienttab[client->number = c] = client; | |
249 | spin_unlock_irqrestore(&clients_lock, flags); | |
250 | return client; | |
251 | } | |
252 | } else { | |
253 | if (clienttab[client_index] == NULL && !clienttablock[client_index]) { | |
254 | clienttab[client->number = client_index] = client; | |
255 | spin_unlock_irqrestore(&clients_lock, flags); | |
256 | return client; | |
257 | } | |
258 | } | |
259 | spin_unlock_irqrestore(&clients_lock, flags); | |
260 | snd_seq_pool_delete(&client->pool); | |
261 | kfree(client); | |
262 | return NULL; /* no free slot found or busy, return failure code */ | |
263 | } | |
264 | ||
265 | ||
c7e0b5bf | 266 | static int seq_free_client1(struct snd_seq_client *client) |
1da177e4 LT |
267 | { |
268 | unsigned long flags; | |
269 | ||
7eaa943c TI |
270 | if (!client) |
271 | return 0; | |
1da177e4 LT |
272 | snd_seq_delete_all_ports(client); |
273 | snd_seq_queue_client_leave(client->number); | |
274 | spin_lock_irqsave(&clients_lock, flags); | |
275 | clienttablock[client->number] = 1; | |
276 | clienttab[client->number] = NULL; | |
277 | spin_unlock_irqrestore(&clients_lock, flags); | |
278 | snd_use_lock_sync(&client->use_lock); | |
279 | snd_seq_queue_client_termination(client->number); | |
280 | if (client->pool) | |
281 | snd_seq_pool_delete(&client->pool); | |
282 | spin_lock_irqsave(&clients_lock, flags); | |
283 | clienttablock[client->number] = 0; | |
284 | spin_unlock_irqrestore(&clients_lock, flags); | |
285 | return 0; | |
286 | } | |
287 | ||
288 | ||
c7e0b5bf | 289 | static void seq_free_client(struct snd_seq_client * client) |
1da177e4 | 290 | { |
1a60d4c5 | 291 | mutex_lock(®ister_mutex); |
1da177e4 LT |
292 | switch (client->type) { |
293 | case NO_CLIENT: | |
c7e0b5bf TI |
294 | snd_printk(KERN_WARNING "Seq: Trying to free unused client %d\n", |
295 | client->number); | |
1da177e4 LT |
296 | break; |
297 | case USER_CLIENT: | |
298 | case KERNEL_CLIENT: | |
299 | seq_free_client1(client); | |
300 | usage_free(&client_usage, 1); | |
301 | break; | |
302 | ||
303 | default: | |
c7e0b5bf TI |
304 | snd_printk(KERN_ERR "Seq: Trying to free client %d with undefined type = %d\n", |
305 | client->number, client->type); | |
1da177e4 | 306 | } |
1a60d4c5 | 307 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
308 | |
309 | snd_seq_system_client_ev_client_exit(client->number); | |
310 | } | |
311 | ||
312 | ||
313 | ||
314 | /* -------------------------------------------------------- */ | |
315 | ||
316 | /* create a user client */ | |
317 | static int snd_seq_open(struct inode *inode, struct file *file) | |
318 | { | |
319 | int c, mode; /* client id */ | |
c7e0b5bf TI |
320 | struct snd_seq_client *client; |
321 | struct snd_seq_user_client *user; | |
02f4865f TI |
322 | int err; |
323 | ||
324 | err = nonseekable_open(inode, file); | |
325 | if (err < 0) | |
326 | return err; | |
1da177e4 | 327 | |
1a60d4c5 | 328 | if (mutex_lock_interruptible(®ister_mutex)) |
1da177e4 | 329 | return -ERESTARTSYS; |
aa1e77e6 | 330 | client = seq_create_client1(-1, SNDRV_SEQ_DEFAULT_EVENTS); |
1da177e4 | 331 | if (client == NULL) { |
1a60d4c5 | 332 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
333 | return -ENOMEM; /* failure code */ |
334 | } | |
335 | ||
336 | mode = snd_seq_file_flags(file); | |
337 | if (mode & SNDRV_SEQ_LFLG_INPUT) | |
338 | client->accept_input = 1; | |
339 | if (mode & SNDRV_SEQ_LFLG_OUTPUT) | |
340 | client->accept_output = 1; | |
341 | ||
342 | user = &client->data.user; | |
343 | user->fifo = NULL; | |
344 | user->fifo_pool_size = 0; | |
345 | ||
346 | if (mode & SNDRV_SEQ_LFLG_INPUT) { | |
347 | user->fifo_pool_size = SNDRV_SEQ_DEFAULT_CLIENT_EVENTS; | |
348 | user->fifo = snd_seq_fifo_new(user->fifo_pool_size); | |
349 | if (user->fifo == NULL) { | |
350 | seq_free_client1(client); | |
351 | kfree(client); | |
1a60d4c5 | 352 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
353 | return -ENOMEM; |
354 | } | |
355 | } | |
356 | ||
357 | usage_alloc(&client_usage, 1); | |
358 | client->type = USER_CLIENT; | |
1a60d4c5 | 359 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
360 | |
361 | c = client->number; | |
362 | file->private_data = client; | |
363 | ||
364 | /* fill client data */ | |
365 | user->file = file; | |
366 | sprintf(client->name, "Client-%d", c); | |
367 | ||
368 | /* make others aware this new client */ | |
369 | snd_seq_system_client_ev_client_start(c); | |
370 | ||
371 | return 0; | |
372 | } | |
373 | ||
374 | /* delete a user client */ | |
375 | static int snd_seq_release(struct inode *inode, struct file *file) | |
376 | { | |
c7e0b5bf | 377 | struct snd_seq_client *client = file->private_data; |
1da177e4 LT |
378 | |
379 | if (client) { | |
380 | seq_free_client(client); | |
381 | if (client->data.user.fifo) | |
382 | snd_seq_fifo_delete(&client->data.user.fifo); | |
383 | kfree(client); | |
384 | } | |
385 | ||
386 | return 0; | |
387 | } | |
388 | ||
389 | ||
390 | /* handle client read() */ | |
391 | /* possible error values: | |
392 | * -ENXIO invalid client or file open mode | |
393 | * -ENOSPC FIFO overflow (the flag is cleared after this error report) | |
394 | * -EINVAL no enough user-space buffer to write the whole event | |
395 | * -EFAULT seg. fault during copy to user space | |
396 | */ | |
c7e0b5bf TI |
397 | static ssize_t snd_seq_read(struct file *file, char __user *buf, size_t count, |
398 | loff_t *offset) | |
1da177e4 | 399 | { |
c7e0b5bf TI |
400 | struct snd_seq_client *client = file->private_data; |
401 | struct snd_seq_fifo *fifo; | |
1da177e4 LT |
402 | int err; |
403 | long result = 0; | |
c7e0b5bf | 404 | struct snd_seq_event_cell *cell; |
1da177e4 LT |
405 | |
406 | if (!(snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_INPUT)) | |
407 | return -ENXIO; | |
408 | ||
409 | if (!access_ok(VERIFY_WRITE, buf, count)) | |
410 | return -EFAULT; | |
411 | ||
412 | /* check client structures are in place */ | |
7eaa943c TI |
413 | if (snd_BUG_ON(!client)) |
414 | return -ENXIO; | |
1da177e4 LT |
415 | |
416 | if (!client->accept_input || (fifo = client->data.user.fifo) == NULL) | |
417 | return -ENXIO; | |
418 | ||
419 | if (atomic_read(&fifo->overflow) > 0) { | |
420 | /* buffer overflow is detected */ | |
421 | snd_seq_fifo_clear(fifo); | |
422 | /* return error code */ | |
423 | return -ENOSPC; | |
424 | } | |
425 | ||
426 | cell = NULL; | |
427 | err = 0; | |
428 | snd_seq_fifo_lock(fifo); | |
429 | ||
430 | /* while data available in queue */ | |
c7e0b5bf | 431 | while (count >= sizeof(struct snd_seq_event)) { |
1da177e4 LT |
432 | int nonblock; |
433 | ||
434 | nonblock = (file->f_flags & O_NONBLOCK) || result > 0; | |
435 | if ((err = snd_seq_fifo_cell_out(fifo, &cell, nonblock)) < 0) { | |
436 | break; | |
437 | } | |
438 | if (snd_seq_ev_is_variable(&cell->event)) { | |
c7e0b5bf | 439 | struct snd_seq_event tmpev; |
1da177e4 LT |
440 | tmpev = cell->event; |
441 | tmpev.data.ext.len &= ~SNDRV_SEQ_EXT_MASK; | |
c7e0b5bf | 442 | if (copy_to_user(buf, &tmpev, sizeof(struct snd_seq_event))) { |
1da177e4 LT |
443 | err = -EFAULT; |
444 | break; | |
445 | } | |
c7e0b5bf TI |
446 | count -= sizeof(struct snd_seq_event); |
447 | buf += sizeof(struct snd_seq_event); | |
4d23359b CL |
448 | err = snd_seq_expand_var_event(&cell->event, count, |
449 | (char __force *)buf, 0, | |
c7e0b5bf | 450 | sizeof(struct snd_seq_event)); |
1da177e4 LT |
451 | if (err < 0) |
452 | break; | |
453 | result += err; | |
454 | count -= err; | |
455 | buf += err; | |
456 | } else { | |
c7e0b5bf | 457 | if (copy_to_user(buf, &cell->event, sizeof(struct snd_seq_event))) { |
1da177e4 LT |
458 | err = -EFAULT; |
459 | break; | |
460 | } | |
c7e0b5bf TI |
461 | count -= sizeof(struct snd_seq_event); |
462 | buf += sizeof(struct snd_seq_event); | |
1da177e4 LT |
463 | } |
464 | snd_seq_cell_free(cell); | |
465 | cell = NULL; /* to be sure */ | |
c7e0b5bf | 466 | result += sizeof(struct snd_seq_event); |
1da177e4 LT |
467 | } |
468 | ||
469 | if (err < 0) { | |
470 | if (cell) | |
471 | snd_seq_fifo_cell_putback(fifo, cell); | |
472 | if (err == -EAGAIN && result > 0) | |
473 | err = 0; | |
474 | } | |
475 | snd_seq_fifo_unlock(fifo); | |
476 | ||
477 | return (err < 0) ? err : result; | |
478 | } | |
479 | ||
480 | ||
481 | /* | |
482 | * check access permission to the port | |
483 | */ | |
c7e0b5bf | 484 | static int check_port_perm(struct snd_seq_client_port *port, unsigned int flags) |
1da177e4 LT |
485 | { |
486 | if ((port->capability & flags) != flags) | |
487 | return 0; | |
488 | return flags; | |
489 | } | |
490 | ||
491 | /* | |
492 | * check if the destination client is available, and return the pointer | |
493 | * if filter is non-zero, client filter bitmap is tested. | |
494 | */ | |
c7e0b5bf TI |
495 | static struct snd_seq_client *get_event_dest_client(struct snd_seq_event *event, |
496 | int filter) | |
1da177e4 | 497 | { |
c7e0b5bf | 498 | struct snd_seq_client *dest; |
1da177e4 LT |
499 | |
500 | dest = snd_seq_client_use_ptr(event->dest.client); | |
501 | if (dest == NULL) | |
502 | return NULL; | |
503 | if (! dest->accept_input) | |
504 | goto __not_avail; | |
505 | if ((dest->filter & SNDRV_SEQ_FILTER_USE_EVENT) && | |
506 | ! test_bit(event->type, dest->event_filter)) | |
507 | goto __not_avail; | |
508 | if (filter && !(dest->filter & filter)) | |
509 | goto __not_avail; | |
510 | ||
511 | return dest; /* ok - accessible */ | |
512 | __not_avail: | |
513 | snd_seq_client_unlock(dest); | |
514 | return NULL; | |
515 | } | |
516 | ||
517 | ||
518 | /* | |
519 | * Return the error event. | |
520 | * | |
521 | * If the receiver client is a user client, the original event is | |
522 | * encapsulated in SNDRV_SEQ_EVENT_BOUNCE as variable length event. If | |
523 | * the original event is also variable length, the external data is | |
524 | * copied after the event record. | |
525 | * If the receiver client is a kernel client, the original event is | |
526 | * quoted in SNDRV_SEQ_EVENT_KERNEL_ERROR, since this requires no extra | |
527 | * kmalloc. | |
528 | */ | |
c7e0b5bf TI |
529 | static int bounce_error_event(struct snd_seq_client *client, |
530 | struct snd_seq_event *event, | |
1da177e4 LT |
531 | int err, int atomic, int hop) |
532 | { | |
c7e0b5bf | 533 | struct snd_seq_event bounce_ev; |
1da177e4 LT |
534 | int result; |
535 | ||
536 | if (client == NULL || | |
537 | ! (client->filter & SNDRV_SEQ_FILTER_BOUNCE) || | |
538 | ! client->accept_input) | |
539 | return 0; /* ignored */ | |
540 | ||
541 | /* set up quoted error */ | |
542 | memset(&bounce_ev, 0, sizeof(bounce_ev)); | |
543 | bounce_ev.type = SNDRV_SEQ_EVENT_KERNEL_ERROR; | |
544 | bounce_ev.flags = SNDRV_SEQ_EVENT_LENGTH_FIXED; | |
545 | bounce_ev.queue = SNDRV_SEQ_QUEUE_DIRECT; | |
546 | bounce_ev.source.client = SNDRV_SEQ_CLIENT_SYSTEM; | |
547 | bounce_ev.source.port = SNDRV_SEQ_PORT_SYSTEM_ANNOUNCE; | |
548 | bounce_ev.dest.client = client->number; | |
549 | bounce_ev.dest.port = event->source.port; | |
550 | bounce_ev.data.quote.origin = event->dest; | |
551 | bounce_ev.data.quote.event = event; | |
552 | bounce_ev.data.quote.value = -err; /* use positive value */ | |
553 | result = snd_seq_deliver_single_event(NULL, &bounce_ev, 0, atomic, hop + 1); | |
554 | if (result < 0) { | |
555 | client->event_lost++; | |
556 | return result; | |
557 | } | |
558 | ||
559 | return result; | |
560 | } | |
561 | ||
562 | ||
563 | /* | |
564 | * rewrite the time-stamp of the event record with the curren time | |
565 | * of the given queue. | |
566 | * return non-zero if updated. | |
567 | */ | |
c7e0b5bf TI |
568 | static int update_timestamp_of_queue(struct snd_seq_event *event, |
569 | int queue, int real_time) | |
1da177e4 | 570 | { |
c7e0b5bf | 571 | struct snd_seq_queue *q; |
1da177e4 LT |
572 | |
573 | q = queueptr(queue); | |
574 | if (! q) | |
575 | return 0; | |
576 | event->queue = queue; | |
577 | event->flags &= ~SNDRV_SEQ_TIME_STAMP_MASK; | |
578 | if (real_time) { | |
579 | event->time.time = snd_seq_timer_get_cur_time(q->timer); | |
580 | event->flags |= SNDRV_SEQ_TIME_STAMP_REAL; | |
581 | } else { | |
582 | event->time.tick = snd_seq_timer_get_cur_tick(q->timer); | |
583 | event->flags |= SNDRV_SEQ_TIME_STAMP_TICK; | |
584 | } | |
585 | queuefree(q); | |
586 | return 1; | |
587 | } | |
588 | ||
589 | ||
590 | /* | |
591 | * deliver an event to the specified destination. | |
592 | * if filter is non-zero, client filter bitmap is tested. | |
593 | * | |
594 | * RETURN VALUE: 0 : if succeeded | |
595 | * <0 : error | |
596 | */ | |
c7e0b5bf TI |
597 | static int snd_seq_deliver_single_event(struct snd_seq_client *client, |
598 | struct snd_seq_event *event, | |
1da177e4 LT |
599 | int filter, int atomic, int hop) |
600 | { | |
c7e0b5bf TI |
601 | struct snd_seq_client *dest = NULL; |
602 | struct snd_seq_client_port *dest_port = NULL; | |
1da177e4 LT |
603 | int result = -ENOENT; |
604 | int direct; | |
605 | ||
606 | direct = snd_seq_ev_is_direct(event); | |
607 | ||
608 | dest = get_event_dest_client(event, filter); | |
609 | if (dest == NULL) | |
610 | goto __skip; | |
611 | dest_port = snd_seq_port_use_ptr(dest, event->dest.port); | |
612 | if (dest_port == NULL) | |
613 | goto __skip; | |
614 | ||
615 | /* check permission */ | |
616 | if (! check_port_perm(dest_port, SNDRV_SEQ_PORT_CAP_WRITE)) { | |
617 | result = -EPERM; | |
618 | goto __skip; | |
619 | } | |
620 | ||
621 | if (dest_port->timestamping) | |
622 | update_timestamp_of_queue(event, dest_port->time_queue, | |
623 | dest_port->time_real); | |
624 | ||
625 | switch (dest->type) { | |
626 | case USER_CLIENT: | |
627 | if (dest->data.user.fifo) | |
628 | result = snd_seq_fifo_event_in(dest->data.user.fifo, event); | |
629 | break; | |
630 | ||
631 | case KERNEL_CLIENT: | |
632 | if (dest_port->event_input == NULL) | |
633 | break; | |
c7e0b5bf TI |
634 | result = dest_port->event_input(event, direct, |
635 | dest_port->private_data, | |
636 | atomic, hop); | |
1da177e4 LT |
637 | break; |
638 | default: | |
639 | break; | |
640 | } | |
641 | ||
642 | __skip: | |
643 | if (dest_port) | |
644 | snd_seq_port_unlock(dest_port); | |
645 | if (dest) | |
646 | snd_seq_client_unlock(dest); | |
647 | ||
648 | if (result < 0 && !direct) { | |
649 | result = bounce_error_event(client, event, result, atomic, hop); | |
650 | } | |
651 | return result; | |
652 | } | |
653 | ||
654 | ||
655 | /* | |
656 | * send the event to all subscribers: | |
657 | */ | |
c7e0b5bf TI |
658 | static int deliver_to_subscribers(struct snd_seq_client *client, |
659 | struct snd_seq_event *event, | |
1da177e4 LT |
660 | int atomic, int hop) |
661 | { | |
c7e0b5bf | 662 | struct snd_seq_subscribers *subs; |
1da177e4 | 663 | int err = 0, num_ev = 0; |
c7e0b5bf TI |
664 | struct snd_seq_event event_saved; |
665 | struct snd_seq_client_port *src_port; | |
c7e0b5bf | 666 | struct snd_seq_port_subs_info *grp; |
1da177e4 LT |
667 | |
668 | src_port = snd_seq_port_use_ptr(client, event->source.port); | |
669 | if (src_port == NULL) | |
670 | return -EINVAL; /* invalid source port */ | |
671 | /* save original event record */ | |
672 | event_saved = *event; | |
673 | grp = &src_port->c_src; | |
674 | ||
675 | /* lock list */ | |
676 | if (atomic) | |
677 | read_lock(&grp->list_lock); | |
678 | else | |
679 | down_read(&grp->list_mutex); | |
9244b2c3 | 680 | list_for_each_entry(subs, &grp->list_head, src_list) { |
e53ec492 TI |
681 | /* both ports ready? */ |
682 | if (atomic_read(&subs->ref_count) != 2) | |
683 | continue; | |
1da177e4 LT |
684 | event->dest = subs->info.dest; |
685 | if (subs->info.flags & SNDRV_SEQ_PORT_SUBS_TIMESTAMP) | |
686 | /* convert time according to flag with subscription */ | |
687 | update_timestamp_of_queue(event, subs->info.queue, | |
688 | subs->info.flags & SNDRV_SEQ_PORT_SUBS_TIME_REAL); | |
689 | err = snd_seq_deliver_single_event(client, event, | |
690 | 0, atomic, hop); | |
691 | if (err < 0) | |
692 | break; | |
693 | num_ev++; | |
694 | /* restore original event record */ | |
695 | *event = event_saved; | |
696 | } | |
697 | if (atomic) | |
698 | read_unlock(&grp->list_lock); | |
699 | else | |
700 | up_read(&grp->list_mutex); | |
701 | *event = event_saved; /* restore */ | |
702 | snd_seq_port_unlock(src_port); | |
703 | return (err < 0) ? err : num_ev; | |
704 | } | |
705 | ||
706 | ||
707 | #ifdef SUPPORT_BROADCAST | |
708 | /* | |
709 | * broadcast to all ports: | |
710 | */ | |
c7e0b5bf TI |
711 | static int port_broadcast_event(struct snd_seq_client *client, |
712 | struct snd_seq_event *event, | |
1da177e4 LT |
713 | int atomic, int hop) |
714 | { | |
715 | int num_ev = 0, err = 0; | |
c7e0b5bf | 716 | struct snd_seq_client *dest_client; |
9244b2c3 | 717 | struct snd_seq_client_port *port; |
1da177e4 LT |
718 | |
719 | dest_client = get_event_dest_client(event, SNDRV_SEQ_FILTER_BROADCAST); | |
720 | if (dest_client == NULL) | |
721 | return 0; /* no matching destination */ | |
722 | ||
723 | read_lock(&dest_client->ports_lock); | |
9244b2c3 | 724 | list_for_each_entry(port, &dest_client->ports_list_head, list) { |
1da177e4 LT |
725 | event->dest.port = port->addr.port; |
726 | /* pass NULL as source client to avoid error bounce */ | |
727 | err = snd_seq_deliver_single_event(NULL, event, | |
728 | SNDRV_SEQ_FILTER_BROADCAST, | |
729 | atomic, hop); | |
730 | if (err < 0) | |
731 | break; | |
732 | num_ev++; | |
733 | } | |
734 | read_unlock(&dest_client->ports_lock); | |
735 | snd_seq_client_unlock(dest_client); | |
736 | event->dest.port = SNDRV_SEQ_ADDRESS_BROADCAST; /* restore */ | |
737 | return (err < 0) ? err : num_ev; | |
738 | } | |
739 | ||
740 | /* | |
741 | * send the event to all clients: | |
742 | * if destination port is also ADDRESS_BROADCAST, deliver to all ports. | |
743 | */ | |
c7e0b5bf TI |
744 | static int broadcast_event(struct snd_seq_client *client, |
745 | struct snd_seq_event *event, int atomic, int hop) | |
1da177e4 LT |
746 | { |
747 | int err = 0, num_ev = 0; | |
748 | int dest; | |
c7e0b5bf | 749 | struct snd_seq_addr addr; |
1da177e4 LT |
750 | |
751 | addr = event->dest; /* save */ | |
752 | ||
753 | for (dest = 0; dest < SNDRV_SEQ_MAX_CLIENTS; dest++) { | |
754 | /* don't send to itself */ | |
755 | if (dest == client->number) | |
756 | continue; | |
757 | event->dest.client = dest; | |
758 | event->dest.port = addr.port; | |
759 | if (addr.port == SNDRV_SEQ_ADDRESS_BROADCAST) | |
760 | err = port_broadcast_event(client, event, atomic, hop); | |
761 | else | |
762 | /* pass NULL as source client to avoid error bounce */ | |
763 | err = snd_seq_deliver_single_event(NULL, event, | |
764 | SNDRV_SEQ_FILTER_BROADCAST, | |
765 | atomic, hop); | |
766 | if (err < 0) | |
767 | break; | |
768 | num_ev += err; | |
769 | } | |
770 | event->dest = addr; /* restore */ | |
771 | return (err < 0) ? err : num_ev; | |
772 | } | |
773 | ||
774 | ||
775 | /* multicast - not supported yet */ | |
c7e0b5bf | 776 | static int multicast_event(struct snd_seq_client *client, struct snd_seq_event *event, |
1da177e4 LT |
777 | int atomic, int hop) |
778 | { | |
779 | snd_printd("seq: multicast not supported yet.\n"); | |
780 | return 0; /* ignored */ | |
781 | } | |
782 | #endif /* SUPPORT_BROADCAST */ | |
783 | ||
784 | ||
785 | /* deliver an event to the destination port(s). | |
786 | * if the event is to subscribers or broadcast, the event is dispatched | |
787 | * to multiple targets. | |
788 | * | |
789 | * RETURN VALUE: n > 0 : the number of delivered events. | |
790 | * n == 0 : the event was not passed to any client. | |
791 | * n < 0 : error - event was not processed. | |
792 | */ | |
c7e0b5bf | 793 | static int snd_seq_deliver_event(struct snd_seq_client *client, struct snd_seq_event *event, |
1da177e4 LT |
794 | int atomic, int hop) |
795 | { | |
796 | int result; | |
797 | ||
798 | hop++; | |
799 | if (hop >= SNDRV_SEQ_MAX_HOPS) { | |
800 | snd_printd("too long delivery path (%d:%d->%d:%d)\n", | |
801 | event->source.client, event->source.port, | |
802 | event->dest.client, event->dest.port); | |
803 | return -EMLINK; | |
804 | } | |
805 | ||
806 | if (event->queue == SNDRV_SEQ_ADDRESS_SUBSCRIBERS || | |
807 | event->dest.client == SNDRV_SEQ_ADDRESS_SUBSCRIBERS) | |
808 | result = deliver_to_subscribers(client, event, atomic, hop); | |
809 | #ifdef SUPPORT_BROADCAST | |
810 | else if (event->queue == SNDRV_SEQ_ADDRESS_BROADCAST || | |
811 | event->dest.client == SNDRV_SEQ_ADDRESS_BROADCAST) | |
812 | result = broadcast_event(client, event, atomic, hop); | |
813 | else if (event->dest.client >= SNDRV_SEQ_MAX_CLIENTS) | |
814 | result = multicast_event(client, event, atomic, hop); | |
815 | else if (event->dest.port == SNDRV_SEQ_ADDRESS_BROADCAST) | |
816 | result = port_broadcast_event(client, event, atomic, hop); | |
817 | #endif | |
818 | else | |
819 | result = snd_seq_deliver_single_event(client, event, 0, atomic, hop); | |
820 | ||
821 | return result; | |
822 | } | |
823 | ||
824 | /* | |
825 | * dispatch an event cell: | |
826 | * This function is called only from queue check routines in timer | |
827 | * interrupts or after enqueued. | |
828 | * The event cell shall be released or re-queued in this function. | |
829 | * | |
830 | * RETURN VALUE: n > 0 : the number of delivered events. | |
831 | * n == 0 : the event was not passed to any client. | |
832 | * n < 0 : error - event was not processed. | |
833 | */ | |
c7e0b5bf | 834 | int snd_seq_dispatch_event(struct snd_seq_event_cell *cell, int atomic, int hop) |
1da177e4 | 835 | { |
c7e0b5bf | 836 | struct snd_seq_client *client; |
1da177e4 LT |
837 | int result; |
838 | ||
7eaa943c TI |
839 | if (snd_BUG_ON(!cell)) |
840 | return -EINVAL; | |
1da177e4 LT |
841 | |
842 | client = snd_seq_client_use_ptr(cell->event.source.client); | |
843 | if (client == NULL) { | |
844 | snd_seq_cell_free(cell); /* release this cell */ | |
845 | return -EINVAL; | |
846 | } | |
847 | ||
848 | if (cell->event.type == SNDRV_SEQ_EVENT_NOTE) { | |
849 | /* NOTE event: | |
850 | * the event cell is re-used as a NOTE-OFF event and | |
851 | * enqueued again. | |
852 | */ | |
c7e0b5bf | 853 | struct snd_seq_event tmpev, *ev; |
1da177e4 LT |
854 | |
855 | /* reserve this event to enqueue note-off later */ | |
856 | tmpev = cell->event; | |
857 | tmpev.type = SNDRV_SEQ_EVENT_NOTEON; | |
858 | result = snd_seq_deliver_event(client, &tmpev, atomic, hop); | |
859 | ||
860 | /* | |
861 | * This was originally a note event. We now re-use the | |
862 | * cell for the note-off event. | |
863 | */ | |
864 | ||
865 | ev = &cell->event; | |
866 | ev->type = SNDRV_SEQ_EVENT_NOTEOFF; | |
867 | ev->flags |= SNDRV_SEQ_PRIORITY_HIGH; | |
868 | ||
869 | /* add the duration time */ | |
870 | switch (ev->flags & SNDRV_SEQ_TIME_STAMP_MASK) { | |
871 | case SNDRV_SEQ_TIME_STAMP_TICK: | |
872 | ev->time.tick += ev->data.note.duration; | |
873 | break; | |
874 | case SNDRV_SEQ_TIME_STAMP_REAL: | |
875 | /* unit for duration is ms */ | |
876 | ev->time.time.tv_nsec += 1000000 * (ev->data.note.duration % 1000); | |
877 | ev->time.time.tv_sec += ev->data.note.duration / 1000 + | |
878 | ev->time.time.tv_nsec / 1000000000; | |
879 | ev->time.time.tv_nsec %= 1000000000; | |
880 | break; | |
881 | } | |
882 | ev->data.note.velocity = ev->data.note.off_velocity; | |
883 | ||
884 | /* Now queue this cell as the note off event */ | |
885 | if (snd_seq_enqueue_event(cell, atomic, hop) < 0) | |
886 | snd_seq_cell_free(cell); /* release this cell */ | |
887 | ||
888 | } else { | |
889 | /* Normal events: | |
890 | * event cell is freed after processing the event | |
891 | */ | |
892 | ||
893 | result = snd_seq_deliver_event(client, &cell->event, atomic, hop); | |
894 | snd_seq_cell_free(cell); | |
895 | } | |
896 | ||
897 | snd_seq_client_unlock(client); | |
898 | return result; | |
899 | } | |
900 | ||
901 | ||
902 | /* Allocate a cell from client pool and enqueue it to queue: | |
903 | * if pool is empty and blocking is TRUE, sleep until a new cell is | |
904 | * available. | |
905 | */ | |
c7e0b5bf TI |
906 | static int snd_seq_client_enqueue_event(struct snd_seq_client *client, |
907 | struct snd_seq_event *event, | |
1da177e4 LT |
908 | struct file *file, int blocking, |
909 | int atomic, int hop) | |
910 | { | |
c7e0b5bf | 911 | struct snd_seq_event_cell *cell; |
1da177e4 LT |
912 | int err; |
913 | ||
914 | /* special queue values - force direct passing */ | |
915 | if (event->queue == SNDRV_SEQ_ADDRESS_SUBSCRIBERS) { | |
916 | event->dest.client = SNDRV_SEQ_ADDRESS_SUBSCRIBERS; | |
917 | event->queue = SNDRV_SEQ_QUEUE_DIRECT; | |
918 | } else | |
919 | #ifdef SUPPORT_BROADCAST | |
920 | if (event->queue == SNDRV_SEQ_ADDRESS_BROADCAST) { | |
921 | event->dest.client = SNDRV_SEQ_ADDRESS_BROADCAST; | |
922 | event->queue = SNDRV_SEQ_QUEUE_DIRECT; | |
923 | } | |
924 | #endif | |
925 | if (event->dest.client == SNDRV_SEQ_ADDRESS_SUBSCRIBERS) { | |
926 | /* check presence of source port */ | |
c7e0b5bf | 927 | struct snd_seq_client_port *src_port = snd_seq_port_use_ptr(client, event->source.port); |
1da177e4 LT |
928 | if (src_port == NULL) |
929 | return -EINVAL; | |
930 | snd_seq_port_unlock(src_port); | |
931 | } | |
932 | ||
933 | /* direct event processing without enqueued */ | |
934 | if (snd_seq_ev_is_direct(event)) { | |
935 | if (event->type == SNDRV_SEQ_EVENT_NOTE) | |
936 | return -EINVAL; /* this event must be enqueued! */ | |
937 | return snd_seq_deliver_event(client, event, atomic, hop); | |
938 | } | |
939 | ||
940 | /* Not direct, normal queuing */ | |
941 | if (snd_seq_queue_is_used(event->queue, client->number) <= 0) | |
942 | return -EINVAL; /* invalid queue */ | |
943 | if (! snd_seq_write_pool_allocated(client)) | |
944 | return -ENXIO; /* queue is not allocated */ | |
945 | ||
946 | /* allocate an event cell */ | |
947 | err = snd_seq_event_dup(client->pool, event, &cell, !blocking || atomic, file); | |
948 | if (err < 0) | |
949 | return err; | |
950 | ||
951 | /* we got a cell. enqueue it. */ | |
952 | if ((err = snd_seq_enqueue_event(cell, atomic, hop)) < 0) { | |
953 | snd_seq_cell_free(cell); | |
954 | return err; | |
955 | } | |
956 | ||
957 | return 0; | |
958 | } | |
959 | ||
960 | ||
961 | /* | |
962 | * check validity of event type and data length. | |
963 | * return non-zero if invalid. | |
964 | */ | |
c7e0b5bf | 965 | static int check_event_type_and_length(struct snd_seq_event *ev) |
1da177e4 LT |
966 | { |
967 | switch (snd_seq_ev_length_type(ev)) { | |
968 | case SNDRV_SEQ_EVENT_LENGTH_FIXED: | |
969 | if (snd_seq_ev_is_variable_type(ev)) | |
970 | return -EINVAL; | |
971 | break; | |
972 | case SNDRV_SEQ_EVENT_LENGTH_VARIABLE: | |
973 | if (! snd_seq_ev_is_variable_type(ev) || | |
974 | (ev->data.ext.len & ~SNDRV_SEQ_EXT_MASK) >= SNDRV_SEQ_MAX_EVENT_LEN) | |
975 | return -EINVAL; | |
976 | break; | |
977 | case SNDRV_SEQ_EVENT_LENGTH_VARUSR: | |
e5723b41 | 978 | if (! snd_seq_ev_is_direct(ev)) |
1da177e4 LT |
979 | return -EINVAL; |
980 | break; | |
981 | } | |
982 | return 0; | |
983 | } | |
984 | ||
985 | ||
986 | /* handle write() */ | |
987 | /* possible error values: | |
988 | * -ENXIO invalid client or file open mode | |
989 | * -ENOMEM malloc failed | |
990 | * -EFAULT seg. fault during copy from user space | |
991 | * -EINVAL invalid event | |
992 | * -EAGAIN no space in output pool | |
993 | * -EINTR interrupts while sleep | |
994 | * -EMLINK too many hops | |
995 | * others depends on return value from driver callback | |
996 | */ | |
c7e0b5bf TI |
997 | static ssize_t snd_seq_write(struct file *file, const char __user *buf, |
998 | size_t count, loff_t *offset) | |
1da177e4 | 999 | { |
c7e0b5bf | 1000 | struct snd_seq_client *client = file->private_data; |
1da177e4 LT |
1001 | int written = 0, len; |
1002 | int err = -EINVAL; | |
c7e0b5bf | 1003 | struct snd_seq_event event; |
1da177e4 LT |
1004 | |
1005 | if (!(snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_OUTPUT)) | |
1006 | return -ENXIO; | |
1007 | ||
1008 | /* check client structures are in place */ | |
7eaa943c TI |
1009 | if (snd_BUG_ON(!client)) |
1010 | return -ENXIO; | |
1da177e4 LT |
1011 | |
1012 | if (!client->accept_output || client->pool == NULL) | |
1013 | return -ENXIO; | |
1014 | ||
1015 | /* allocate the pool now if the pool is not allocated yet */ | |
1016 | if (client->pool->size > 0 && !snd_seq_write_pool_allocated(client)) { | |
1017 | if (snd_seq_pool_init(client->pool) < 0) | |
1018 | return -ENOMEM; | |
1019 | } | |
1020 | ||
1021 | /* only process whole events */ | |
c7e0b5bf | 1022 | while (count >= sizeof(struct snd_seq_event)) { |
1da177e4 LT |
1023 | /* Read in the event header from the user */ |
1024 | len = sizeof(event); | |
1025 | if (copy_from_user(&event, buf, len)) { | |
1026 | err = -EFAULT; | |
1027 | break; | |
1028 | } | |
1029 | event.source.client = client->number; /* fill in client number */ | |
1030 | /* Check for extension data length */ | |
1031 | if (check_event_type_and_length(&event)) { | |
1032 | err = -EINVAL; | |
1033 | break; | |
1034 | } | |
1035 | ||
1036 | /* check for special events */ | |
1037 | if (event.type == SNDRV_SEQ_EVENT_NONE) | |
1038 | goto __skip_event; | |
1039 | else if (snd_seq_ev_is_reserved(&event)) { | |
1040 | err = -EINVAL; | |
1041 | break; | |
1042 | } | |
1043 | ||
1044 | if (snd_seq_ev_is_variable(&event)) { | |
1045 | int extlen = event.data.ext.len & ~SNDRV_SEQ_EXT_MASK; | |
1046 | if ((size_t)(extlen + len) > count) { | |
1047 | /* back out, will get an error this time or next */ | |
1048 | err = -EINVAL; | |
1049 | break; | |
1050 | } | |
1051 | /* set user space pointer */ | |
1052 | event.data.ext.len = extlen | SNDRV_SEQ_EXT_USRPTR; | |
4d23359b | 1053 | event.data.ext.ptr = (char __force *)buf |
c7e0b5bf | 1054 | + sizeof(struct snd_seq_event); |
1da177e4 LT |
1055 | len += extlen; /* increment data length */ |
1056 | } else { | |
1057 | #ifdef CONFIG_COMPAT | |
1058 | if (client->convert32 && snd_seq_ev_is_varusr(&event)) { | |
fea952e5 | 1059 | void *ptr = (void __force *)compat_ptr(event.data.raw32.d[1]); |
1da177e4 LT |
1060 | event.data.ext.ptr = ptr; |
1061 | } | |
1062 | #endif | |
1063 | } | |
1064 | ||
1065 | /* ok, enqueue it */ | |
1066 | err = snd_seq_client_enqueue_event(client, &event, file, | |
1067 | !(file->f_flags & O_NONBLOCK), | |
1068 | 0, 0); | |
1069 | if (err < 0) | |
1070 | break; | |
1071 | ||
1072 | __skip_event: | |
1073 | /* Update pointers and counts */ | |
1074 | count -= len; | |
1075 | buf += len; | |
1076 | written += len; | |
1077 | } | |
1078 | ||
1079 | return written ? written : err; | |
1080 | } | |
1081 | ||
1082 | ||
1083 | /* | |
1084 | * handle polling | |
1085 | */ | |
1086 | static unsigned int snd_seq_poll(struct file *file, poll_table * wait) | |
1087 | { | |
c7e0b5bf | 1088 | struct snd_seq_client *client = file->private_data; |
1da177e4 LT |
1089 | unsigned int mask = 0; |
1090 | ||
1091 | /* check client structures are in place */ | |
7eaa943c TI |
1092 | if (snd_BUG_ON(!client)) |
1093 | return -ENXIO; | |
1da177e4 LT |
1094 | |
1095 | if ((snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_INPUT) && | |
1096 | client->data.user.fifo) { | |
1097 | ||
1098 | /* check if data is available in the outqueue */ | |
1099 | if (snd_seq_fifo_poll_wait(client->data.user.fifo, file, wait)) | |
1100 | mask |= POLLIN | POLLRDNORM; | |
1101 | } | |
1102 | ||
1103 | if (snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_OUTPUT) { | |
1104 | ||
1105 | /* check if data is available in the pool */ | |
1106 | if (!snd_seq_write_pool_allocated(client) || | |
1107 | snd_seq_pool_poll_wait(client->pool, file, wait)) | |
1108 | mask |= POLLOUT | POLLWRNORM; | |
1109 | } | |
1110 | ||
1111 | return mask; | |
1112 | } | |
1113 | ||
1114 | ||
1115 | /*-----------------------------------------------------*/ | |
1116 | ||
1117 | ||
1118 | /* SYSTEM_INFO ioctl() */ | |
c7e0b5bf | 1119 | static int snd_seq_ioctl_system_info(struct snd_seq_client *client, void __user *arg) |
1da177e4 | 1120 | { |
c7e0b5bf | 1121 | struct snd_seq_system_info info; |
1da177e4 LT |
1122 | |
1123 | memset(&info, 0, sizeof(info)); | |
1124 | /* fill the info fields */ | |
1125 | info.queues = SNDRV_SEQ_MAX_QUEUES; | |
1126 | info.clients = SNDRV_SEQ_MAX_CLIENTS; | |
1127 | info.ports = 256; /* fixed limit */ | |
1128 | info.channels = 256; /* fixed limit */ | |
1129 | info.cur_clients = client_usage.cur; | |
1130 | info.cur_queues = snd_seq_queue_get_cur_queues(); | |
1131 | ||
1132 | if (copy_to_user(arg, &info, sizeof(info))) | |
1133 | return -EFAULT; | |
1134 | return 0; | |
1135 | } | |
1136 | ||
1137 | ||
1138 | /* RUNNING_MODE ioctl() */ | |
c7e0b5bf | 1139 | static int snd_seq_ioctl_running_mode(struct snd_seq_client *client, void __user *arg) |
1da177e4 | 1140 | { |
c7e0b5bf TI |
1141 | struct snd_seq_running_info info; |
1142 | struct snd_seq_client *cptr; | |
1da177e4 LT |
1143 | int err = 0; |
1144 | ||
1145 | if (copy_from_user(&info, arg, sizeof(info))) | |
1146 | return -EFAULT; | |
1147 | ||
1148 | /* requested client number */ | |
1149 | cptr = snd_seq_client_use_ptr(info.client); | |
1150 | if (cptr == NULL) | |
1151 | return -ENOENT; /* don't change !!! */ | |
1152 | ||
1153 | #ifdef SNDRV_BIG_ENDIAN | |
1154 | if (! info.big_endian) { | |
1155 | err = -EINVAL; | |
1156 | goto __err; | |
1157 | } | |
1158 | #else | |
1159 | if (info.big_endian) { | |
1160 | err = -EINVAL; | |
1161 | goto __err; | |
1162 | } | |
1163 | ||
1164 | #endif | |
1165 | if (info.cpu_mode > sizeof(long)) { | |
1166 | err = -EINVAL; | |
1167 | goto __err; | |
1168 | } | |
1169 | cptr->convert32 = (info.cpu_mode < sizeof(long)); | |
1170 | __err: | |
1171 | snd_seq_client_unlock(cptr); | |
1172 | return err; | |
1173 | } | |
1174 | ||
1175 | /* CLIENT_INFO ioctl() */ | |
c7e0b5bf TI |
1176 | static void get_client_info(struct snd_seq_client *cptr, |
1177 | struct snd_seq_client_info *info) | |
1da177e4 LT |
1178 | { |
1179 | info->client = cptr->number; | |
1180 | ||
1181 | /* fill the info fields */ | |
1182 | info->type = cptr->type; | |
1183 | strcpy(info->name, cptr->name); | |
1184 | info->filter = cptr->filter; | |
1185 | info->event_lost = cptr->event_lost; | |
1186 | memcpy(info->event_filter, cptr->event_filter, 32); | |
1187 | info->num_ports = cptr->num_ports; | |
1188 | memset(info->reserved, 0, sizeof(info->reserved)); | |
1189 | } | |
1190 | ||
c7e0b5bf TI |
1191 | static int snd_seq_ioctl_get_client_info(struct snd_seq_client *client, |
1192 | void __user *arg) | |
1da177e4 | 1193 | { |
c7e0b5bf TI |
1194 | struct snd_seq_client *cptr; |
1195 | struct snd_seq_client_info client_info; | |
1da177e4 LT |
1196 | |
1197 | if (copy_from_user(&client_info, arg, sizeof(client_info))) | |
1198 | return -EFAULT; | |
1199 | ||
1200 | /* requested client number */ | |
1201 | cptr = snd_seq_client_use_ptr(client_info.client); | |
1202 | if (cptr == NULL) | |
1203 | return -ENOENT; /* don't change !!! */ | |
1204 | ||
1205 | get_client_info(cptr, &client_info); | |
1206 | snd_seq_client_unlock(cptr); | |
1207 | ||
1208 | if (copy_to_user(arg, &client_info, sizeof(client_info))) | |
1209 | return -EFAULT; | |
1210 | return 0; | |
1211 | } | |
1212 | ||
1213 | ||
1214 | /* CLIENT_INFO ioctl() */ | |
c7e0b5bf TI |
1215 | static int snd_seq_ioctl_set_client_info(struct snd_seq_client *client, |
1216 | void __user *arg) | |
1da177e4 | 1217 | { |
c7e0b5bf | 1218 | struct snd_seq_client_info client_info; |
1da177e4 LT |
1219 | |
1220 | if (copy_from_user(&client_info, arg, sizeof(client_info))) | |
1221 | return -EFAULT; | |
1222 | ||
1223 | /* it is not allowed to set the info fields for an another client */ | |
1224 | if (client->number != client_info.client) | |
1225 | return -EPERM; | |
1226 | /* also client type must be set now */ | |
1227 | if (client->type != client_info.type) | |
1228 | return -EINVAL; | |
1229 | ||
1230 | /* fill the info fields */ | |
1231 | if (client_info.name[0]) | |
1232 | strlcpy(client->name, client_info.name, sizeof(client->name)); | |
1233 | ||
1234 | client->filter = client_info.filter; | |
1235 | client->event_lost = client_info.event_lost; | |
1236 | memcpy(client->event_filter, client_info.event_filter, 32); | |
1237 | ||
1238 | return 0; | |
1239 | } | |
1240 | ||
1241 | ||
1242 | /* | |
1243 | * CREATE PORT ioctl() | |
1244 | */ | |
c7e0b5bf TI |
1245 | static int snd_seq_ioctl_create_port(struct snd_seq_client *client, |
1246 | void __user *arg) | |
1da177e4 | 1247 | { |
c7e0b5bf TI |
1248 | struct snd_seq_client_port *port; |
1249 | struct snd_seq_port_info info; | |
1250 | struct snd_seq_port_callback *callback; | |
3937c2c9 | 1251 | int port_idx; |
1da177e4 LT |
1252 | |
1253 | if (copy_from_user(&info, arg, sizeof(info))) | |
1254 | return -EFAULT; | |
1255 | ||
1256 | /* it is not allowed to create the port for an another client */ | |
1257 | if (info.addr.client != client->number) | |
1258 | return -EPERM; | |
1259 | ||
1260 | port = snd_seq_create_port(client, (info.flags & SNDRV_SEQ_PORT_FLG_GIVEN_PORT) ? info.addr.port : -1); | |
1261 | if (port == NULL) | |
1262 | return -ENOMEM; | |
1263 | ||
1264 | if (client->type == USER_CLIENT && info.kernel) { | |
3937c2c9 TI |
1265 | port_idx = port->addr.port; |
1266 | snd_seq_port_unlock(port); | |
1267 | snd_seq_delete_port(client, port_idx); | |
1da177e4 LT |
1268 | return -EINVAL; |
1269 | } | |
1270 | if (client->type == KERNEL_CLIENT) { | |
1271 | if ((callback = info.kernel) != NULL) { | |
1272 | if (callback->owner) | |
1273 | port->owner = callback->owner; | |
1274 | port->private_data = callback->private_data; | |
1275 | port->private_free = callback->private_free; | |
1276 | port->callback_all = callback->callback_all; | |
1277 | port->event_input = callback->event_input; | |
1278 | port->c_src.open = callback->subscribe; | |
1279 | port->c_src.close = callback->unsubscribe; | |
1280 | port->c_dest.open = callback->use; | |
1281 | port->c_dest.close = callback->unuse; | |
1282 | } | |
1283 | } | |
1284 | ||
1285 | info.addr = port->addr; | |
1286 | ||
1287 | snd_seq_set_port_info(port, &info); | |
1288 | snd_seq_system_client_ev_port_start(port->addr.client, port->addr.port); | |
3937c2c9 | 1289 | snd_seq_port_unlock(port); |
1da177e4 LT |
1290 | |
1291 | if (copy_to_user(arg, &info, sizeof(info))) | |
1292 | return -EFAULT; | |
1293 | ||
1294 | return 0; | |
1295 | } | |
1296 | ||
1297 | /* | |
1298 | * DELETE PORT ioctl() | |
1299 | */ | |
c7e0b5bf TI |
1300 | static int snd_seq_ioctl_delete_port(struct snd_seq_client *client, |
1301 | void __user *arg) | |
1da177e4 | 1302 | { |
c7e0b5bf | 1303 | struct snd_seq_port_info info; |
1da177e4 LT |
1304 | int err; |
1305 | ||
1306 | /* set passed parameters */ | |
1307 | if (copy_from_user(&info, arg, sizeof(info))) | |
1308 | return -EFAULT; | |
1309 | ||
1310 | /* it is not allowed to remove the port for an another client */ | |
1311 | if (info.addr.client != client->number) | |
1312 | return -EPERM; | |
1313 | ||
1314 | err = snd_seq_delete_port(client, info.addr.port); | |
1315 | if (err >= 0) | |
1316 | snd_seq_system_client_ev_port_exit(client->number, info.addr.port); | |
1317 | return err; | |
1318 | } | |
1319 | ||
1320 | ||
1321 | /* | |
1322 | * GET_PORT_INFO ioctl() (on any client) | |
1323 | */ | |
c7e0b5bf TI |
1324 | static int snd_seq_ioctl_get_port_info(struct snd_seq_client *client, |
1325 | void __user *arg) | |
1da177e4 | 1326 | { |
c7e0b5bf TI |
1327 | struct snd_seq_client *cptr; |
1328 | struct snd_seq_client_port *port; | |
1329 | struct snd_seq_port_info info; | |
1da177e4 LT |
1330 | |
1331 | if (copy_from_user(&info, arg, sizeof(info))) | |
1332 | return -EFAULT; | |
1333 | cptr = snd_seq_client_use_ptr(info.addr.client); | |
1334 | if (cptr == NULL) | |
1335 | return -ENXIO; | |
1336 | ||
1337 | port = snd_seq_port_use_ptr(cptr, info.addr.port); | |
1338 | if (port == NULL) { | |
1339 | snd_seq_client_unlock(cptr); | |
1340 | return -ENOENT; /* don't change */ | |
1341 | } | |
1342 | ||
1343 | /* get port info */ | |
1344 | snd_seq_get_port_info(port, &info); | |
1345 | snd_seq_port_unlock(port); | |
1346 | snd_seq_client_unlock(cptr); | |
1347 | ||
1348 | if (copy_to_user(arg, &info, sizeof(info))) | |
1349 | return -EFAULT; | |
1350 | return 0; | |
1351 | } | |
1352 | ||
1353 | ||
1354 | /* | |
1355 | * SET_PORT_INFO ioctl() (only ports on this/own client) | |
1356 | */ | |
c7e0b5bf TI |
1357 | static int snd_seq_ioctl_set_port_info(struct snd_seq_client *client, |
1358 | void __user *arg) | |
1da177e4 | 1359 | { |
c7e0b5bf TI |
1360 | struct snd_seq_client_port *port; |
1361 | struct snd_seq_port_info info; | |
1da177e4 LT |
1362 | |
1363 | if (copy_from_user(&info, arg, sizeof(info))) | |
1364 | return -EFAULT; | |
1365 | ||
1366 | if (info.addr.client != client->number) /* only set our own ports ! */ | |
1367 | return -EPERM; | |
1368 | port = snd_seq_port_use_ptr(client, info.addr.port); | |
1369 | if (port) { | |
1370 | snd_seq_set_port_info(port, &info); | |
1371 | snd_seq_port_unlock(port); | |
1372 | } | |
1373 | return 0; | |
1374 | } | |
1375 | ||
1376 | ||
1377 | /* | |
1378 | * port subscription (connection) | |
1379 | */ | |
1380 | #define PERM_RD (SNDRV_SEQ_PORT_CAP_READ|SNDRV_SEQ_PORT_CAP_SUBS_READ) | |
1381 | #define PERM_WR (SNDRV_SEQ_PORT_CAP_WRITE|SNDRV_SEQ_PORT_CAP_SUBS_WRITE) | |
1382 | ||
c7e0b5bf TI |
1383 | static int check_subscription_permission(struct snd_seq_client *client, |
1384 | struct snd_seq_client_port *sport, | |
1385 | struct snd_seq_client_port *dport, | |
1386 | struct snd_seq_port_subscribe *subs) | |
1da177e4 LT |
1387 | { |
1388 | if (client->number != subs->sender.client && | |
1389 | client->number != subs->dest.client) { | |
1390 | /* connection by third client - check export permission */ | |
1391 | if (check_port_perm(sport, SNDRV_SEQ_PORT_CAP_NO_EXPORT)) | |
1392 | return -EPERM; | |
1393 | if (check_port_perm(dport, SNDRV_SEQ_PORT_CAP_NO_EXPORT)) | |
1394 | return -EPERM; | |
1395 | } | |
1396 | ||
1397 | /* check read permission */ | |
1398 | /* if sender or receiver is the subscribing client itself, | |
1399 | * no permission check is necessary | |
1400 | */ | |
1401 | if (client->number != subs->sender.client) { | |
1402 | if (! check_port_perm(sport, PERM_RD)) | |
1403 | return -EPERM; | |
1404 | } | |
1405 | /* check write permission */ | |
1406 | if (client->number != subs->dest.client) { | |
1407 | if (! check_port_perm(dport, PERM_WR)) | |
1408 | return -EPERM; | |
1409 | } | |
1410 | return 0; | |
1411 | } | |
1412 | ||
1413 | /* | |
1414 | * send an subscription notify event to user client: | |
1415 | * client must be user client. | |
1416 | */ | |
1417 | int snd_seq_client_notify_subscription(int client, int port, | |
c7e0b5bf TI |
1418 | struct snd_seq_port_subscribe *info, |
1419 | int evtype) | |
1da177e4 | 1420 | { |
c7e0b5bf | 1421 | struct snd_seq_event event; |
1da177e4 LT |
1422 | |
1423 | memset(&event, 0, sizeof(event)); | |
1424 | event.type = evtype; | |
1425 | event.data.connect.dest = info->dest; | |
1426 | event.data.connect.sender = info->sender; | |
1427 | ||
1428 | return snd_seq_system_notify(client, port, &event); /* non-atomic */ | |
1429 | } | |
1430 | ||
1431 | ||
1432 | /* | |
1433 | * add to port's subscription list IOCTL interface | |
1434 | */ | |
c7e0b5bf TI |
1435 | static int snd_seq_ioctl_subscribe_port(struct snd_seq_client *client, |
1436 | void __user *arg) | |
1da177e4 LT |
1437 | { |
1438 | int result = -EINVAL; | |
c7e0b5bf TI |
1439 | struct snd_seq_client *receiver = NULL, *sender = NULL; |
1440 | struct snd_seq_client_port *sport = NULL, *dport = NULL; | |
1441 | struct snd_seq_port_subscribe subs; | |
1da177e4 LT |
1442 | |
1443 | if (copy_from_user(&subs, arg, sizeof(subs))) | |
1444 | return -EFAULT; | |
1445 | ||
1446 | if ((receiver = snd_seq_client_use_ptr(subs.dest.client)) == NULL) | |
1447 | goto __end; | |
1448 | if ((sender = snd_seq_client_use_ptr(subs.sender.client)) == NULL) | |
1449 | goto __end; | |
1450 | if ((sport = snd_seq_port_use_ptr(sender, subs.sender.port)) == NULL) | |
1451 | goto __end; | |
1452 | if ((dport = snd_seq_port_use_ptr(receiver, subs.dest.port)) == NULL) | |
1453 | goto __end; | |
1454 | ||
1455 | result = check_subscription_permission(client, sport, dport, &subs); | |
1456 | if (result < 0) | |
1457 | goto __end; | |
1458 | ||
1459 | /* connect them */ | |
1460 | result = snd_seq_port_connect(client, sender, sport, receiver, dport, &subs); | |
1461 | if (! result) /* broadcast announce */ | |
1462 | snd_seq_client_notify_subscription(SNDRV_SEQ_ADDRESS_SUBSCRIBERS, 0, | |
1463 | &subs, SNDRV_SEQ_EVENT_PORT_SUBSCRIBED); | |
1464 | __end: | |
1465 | if (sport) | |
1466 | snd_seq_port_unlock(sport); | |
1467 | if (dport) | |
1468 | snd_seq_port_unlock(dport); | |
1469 | if (sender) | |
1470 | snd_seq_client_unlock(sender); | |
1471 | if (receiver) | |
1472 | snd_seq_client_unlock(receiver); | |
1473 | return result; | |
1474 | } | |
1475 | ||
1476 | ||
1477 | /* | |
1478 | * remove from port's subscription list | |
1479 | */ | |
c7e0b5bf TI |
1480 | static int snd_seq_ioctl_unsubscribe_port(struct snd_seq_client *client, |
1481 | void __user *arg) | |
1da177e4 LT |
1482 | { |
1483 | int result = -ENXIO; | |
c7e0b5bf TI |
1484 | struct snd_seq_client *receiver = NULL, *sender = NULL; |
1485 | struct snd_seq_client_port *sport = NULL, *dport = NULL; | |
1486 | struct snd_seq_port_subscribe subs; | |
1da177e4 LT |
1487 | |
1488 | if (copy_from_user(&subs, arg, sizeof(subs))) | |
1489 | return -EFAULT; | |
1490 | ||
1491 | if ((receiver = snd_seq_client_use_ptr(subs.dest.client)) == NULL) | |
1492 | goto __end; | |
1493 | if ((sender = snd_seq_client_use_ptr(subs.sender.client)) == NULL) | |
1494 | goto __end; | |
1495 | if ((sport = snd_seq_port_use_ptr(sender, subs.sender.port)) == NULL) | |
1496 | goto __end; | |
1497 | if ((dport = snd_seq_port_use_ptr(receiver, subs.dest.port)) == NULL) | |
1498 | goto __end; | |
1499 | ||
1500 | result = check_subscription_permission(client, sport, dport, &subs); | |
1501 | if (result < 0) | |
1502 | goto __end; | |
1503 | ||
1504 | result = snd_seq_port_disconnect(client, sender, sport, receiver, dport, &subs); | |
1505 | if (! result) /* broadcast announce */ | |
1506 | snd_seq_client_notify_subscription(SNDRV_SEQ_ADDRESS_SUBSCRIBERS, 0, | |
1507 | &subs, SNDRV_SEQ_EVENT_PORT_UNSUBSCRIBED); | |
1508 | __end: | |
1509 | if (sport) | |
1510 | snd_seq_port_unlock(sport); | |
1511 | if (dport) | |
1512 | snd_seq_port_unlock(dport); | |
1513 | if (sender) | |
1514 | snd_seq_client_unlock(sender); | |
1515 | if (receiver) | |
1516 | snd_seq_client_unlock(receiver); | |
1517 | return result; | |
1518 | } | |
1519 | ||
1520 | ||
1521 | /* CREATE_QUEUE ioctl() */ | |
c7e0b5bf TI |
1522 | static int snd_seq_ioctl_create_queue(struct snd_seq_client *client, |
1523 | void __user *arg) | |
1da177e4 | 1524 | { |
c7e0b5bf | 1525 | struct snd_seq_queue_info info; |
1da177e4 | 1526 | int result; |
c7e0b5bf | 1527 | struct snd_seq_queue *q; |
1da177e4 LT |
1528 | |
1529 | if (copy_from_user(&info, arg, sizeof(info))) | |
1530 | return -EFAULT; | |
1531 | ||
1532 | result = snd_seq_queue_alloc(client->number, info.locked, info.flags); | |
1533 | if (result < 0) | |
1534 | return result; | |
1535 | ||
1536 | q = queueptr(result); | |
1537 | if (q == NULL) | |
1538 | return -EINVAL; | |
1539 | ||
1540 | info.queue = q->queue; | |
1541 | info.locked = q->locked; | |
1542 | info.owner = q->owner; | |
1543 | ||
1544 | /* set queue name */ | |
1545 | if (! info.name[0]) | |
1546 | snprintf(info.name, sizeof(info.name), "Queue-%d", q->queue); | |
1547 | strlcpy(q->name, info.name, sizeof(q->name)); | |
1548 | queuefree(q); | |
1549 | ||
1550 | if (copy_to_user(arg, &info, sizeof(info))) | |
1551 | return -EFAULT; | |
1552 | ||
1553 | return 0; | |
1554 | } | |
1555 | ||
1556 | /* DELETE_QUEUE ioctl() */ | |
c7e0b5bf TI |
1557 | static int snd_seq_ioctl_delete_queue(struct snd_seq_client *client, |
1558 | void __user *arg) | |
1da177e4 | 1559 | { |
c7e0b5bf | 1560 | struct snd_seq_queue_info info; |
1da177e4 LT |
1561 | |
1562 | if (copy_from_user(&info, arg, sizeof(info))) | |
1563 | return -EFAULT; | |
1564 | ||
1565 | return snd_seq_queue_delete(client->number, info.queue); | |
1566 | } | |
1567 | ||
1568 | /* GET_QUEUE_INFO ioctl() */ | |
c7e0b5bf TI |
1569 | static int snd_seq_ioctl_get_queue_info(struct snd_seq_client *client, |
1570 | void __user *arg) | |
1da177e4 | 1571 | { |
c7e0b5bf TI |
1572 | struct snd_seq_queue_info info; |
1573 | struct snd_seq_queue *q; | |
1da177e4 LT |
1574 | |
1575 | if (copy_from_user(&info, arg, sizeof(info))) | |
1576 | return -EFAULT; | |
1577 | ||
1578 | q = queueptr(info.queue); | |
1579 | if (q == NULL) | |
1580 | return -EINVAL; | |
1581 | ||
1582 | memset(&info, 0, sizeof(info)); | |
1583 | info.queue = q->queue; | |
1584 | info.owner = q->owner; | |
1585 | info.locked = q->locked; | |
1586 | strlcpy(info.name, q->name, sizeof(info.name)); | |
1587 | queuefree(q); | |
1588 | ||
1589 | if (copy_to_user(arg, &info, sizeof(info))) | |
1590 | return -EFAULT; | |
1591 | ||
1592 | return 0; | |
1593 | } | |
1594 | ||
1595 | /* SET_QUEUE_INFO ioctl() */ | |
c7e0b5bf TI |
1596 | static int snd_seq_ioctl_set_queue_info(struct snd_seq_client *client, |
1597 | void __user *arg) | |
1da177e4 | 1598 | { |
c7e0b5bf TI |
1599 | struct snd_seq_queue_info info; |
1600 | struct snd_seq_queue *q; | |
1da177e4 LT |
1601 | |
1602 | if (copy_from_user(&info, arg, sizeof(info))) | |
1603 | return -EFAULT; | |
1604 | ||
1605 | if (info.owner != client->number) | |
1606 | return -EINVAL; | |
1607 | ||
1608 | /* change owner/locked permission */ | |
1609 | if (snd_seq_queue_check_access(info.queue, client->number)) { | |
1610 | if (snd_seq_queue_set_owner(info.queue, client->number, info.locked) < 0) | |
1611 | return -EPERM; | |
1612 | if (info.locked) | |
1613 | snd_seq_queue_use(info.queue, client->number, 1); | |
1614 | } else { | |
1615 | return -EPERM; | |
1616 | } | |
1617 | ||
1618 | q = queueptr(info.queue); | |
1619 | if (! q) | |
1620 | return -EINVAL; | |
1621 | if (q->owner != client->number) { | |
1622 | queuefree(q); | |
1623 | return -EPERM; | |
1624 | } | |
1625 | strlcpy(q->name, info.name, sizeof(q->name)); | |
1626 | queuefree(q); | |
1627 | ||
1628 | return 0; | |
1629 | } | |
1630 | ||
1631 | /* GET_NAMED_QUEUE ioctl() */ | |
c7e0b5bf | 1632 | static int snd_seq_ioctl_get_named_queue(struct snd_seq_client *client, void __user *arg) |
1da177e4 | 1633 | { |
c7e0b5bf TI |
1634 | struct snd_seq_queue_info info; |
1635 | struct snd_seq_queue *q; | |
1da177e4 LT |
1636 | |
1637 | if (copy_from_user(&info, arg, sizeof(info))) | |
1638 | return -EFAULT; | |
1639 | ||
1640 | q = snd_seq_queue_find_name(info.name); | |
1641 | if (q == NULL) | |
1642 | return -EINVAL; | |
1643 | info.queue = q->queue; | |
1644 | info.owner = q->owner; | |
1645 | info.locked = q->locked; | |
1646 | queuefree(q); | |
1647 | ||
1648 | if (copy_to_user(arg, &info, sizeof(info))) | |
1649 | return -EFAULT; | |
1650 | ||
1651 | return 0; | |
1652 | } | |
1653 | ||
1654 | /* GET_QUEUE_STATUS ioctl() */ | |
c7e0b5bf TI |
1655 | static int snd_seq_ioctl_get_queue_status(struct snd_seq_client *client, |
1656 | void __user *arg) | |
1da177e4 | 1657 | { |
c7e0b5bf TI |
1658 | struct snd_seq_queue_status status; |
1659 | struct snd_seq_queue *queue; | |
1660 | struct snd_seq_timer *tmr; | |
1da177e4 LT |
1661 | |
1662 | if (copy_from_user(&status, arg, sizeof(status))) | |
1663 | return -EFAULT; | |
1664 | ||
1665 | queue = queueptr(status.queue); | |
1666 | if (queue == NULL) | |
1667 | return -EINVAL; | |
1668 | memset(&status, 0, sizeof(status)); | |
1669 | status.queue = queue->queue; | |
1670 | ||
1671 | tmr = queue->timer; | |
1672 | status.events = queue->tickq->cells + queue->timeq->cells; | |
1673 | ||
1674 | status.time = snd_seq_timer_get_cur_time(tmr); | |
1675 | status.tick = snd_seq_timer_get_cur_tick(tmr); | |
1676 | ||
1677 | status.running = tmr->running; | |
1678 | ||
1679 | status.flags = queue->flags; | |
1680 | queuefree(queue); | |
1681 | ||
1682 | if (copy_to_user(arg, &status, sizeof(status))) | |
1683 | return -EFAULT; | |
1684 | return 0; | |
1685 | } | |
1686 | ||
1687 | ||
1688 | /* GET_QUEUE_TEMPO ioctl() */ | |
c7e0b5bf TI |
1689 | static int snd_seq_ioctl_get_queue_tempo(struct snd_seq_client *client, |
1690 | void __user *arg) | |
1da177e4 | 1691 | { |
c7e0b5bf TI |
1692 | struct snd_seq_queue_tempo tempo; |
1693 | struct snd_seq_queue *queue; | |
1694 | struct snd_seq_timer *tmr; | |
1da177e4 LT |
1695 | |
1696 | if (copy_from_user(&tempo, arg, sizeof(tempo))) | |
1697 | return -EFAULT; | |
1698 | ||
1699 | queue = queueptr(tempo.queue); | |
1700 | if (queue == NULL) | |
1701 | return -EINVAL; | |
1702 | memset(&tempo, 0, sizeof(tempo)); | |
1703 | tempo.queue = queue->queue; | |
1704 | ||
1705 | tmr = queue->timer; | |
1706 | ||
1707 | tempo.tempo = tmr->tempo; | |
1708 | tempo.ppq = tmr->ppq; | |
1709 | tempo.skew_value = tmr->skew; | |
1710 | tempo.skew_base = tmr->skew_base; | |
1711 | queuefree(queue); | |
1712 | ||
1713 | if (copy_to_user(arg, &tempo, sizeof(tempo))) | |
1714 | return -EFAULT; | |
1715 | return 0; | |
1716 | } | |
1717 | ||
1718 | ||
1719 | /* SET_QUEUE_TEMPO ioctl() */ | |
c7e0b5bf | 1720 | int snd_seq_set_queue_tempo(int client, struct snd_seq_queue_tempo *tempo) |
1da177e4 LT |
1721 | { |
1722 | if (!snd_seq_queue_check_access(tempo->queue, client)) | |
1723 | return -EPERM; | |
1724 | return snd_seq_queue_timer_set_tempo(tempo->queue, client, tempo); | |
1725 | } | |
1726 | ||
91715ed9 TI |
1727 | EXPORT_SYMBOL(snd_seq_set_queue_tempo); |
1728 | ||
c7e0b5bf TI |
1729 | static int snd_seq_ioctl_set_queue_tempo(struct snd_seq_client *client, |
1730 | void __user *arg) | |
1da177e4 LT |
1731 | { |
1732 | int result; | |
c7e0b5bf | 1733 | struct snd_seq_queue_tempo tempo; |
1da177e4 LT |
1734 | |
1735 | if (copy_from_user(&tempo, arg, sizeof(tempo))) | |
1736 | return -EFAULT; | |
1737 | ||
1738 | result = snd_seq_set_queue_tempo(client->number, &tempo); | |
1739 | return result < 0 ? result : 0; | |
1740 | } | |
1741 | ||
1742 | ||
1743 | /* GET_QUEUE_TIMER ioctl() */ | |
c7e0b5bf TI |
1744 | static int snd_seq_ioctl_get_queue_timer(struct snd_seq_client *client, |
1745 | void __user *arg) | |
1da177e4 | 1746 | { |
c7e0b5bf TI |
1747 | struct snd_seq_queue_timer timer; |
1748 | struct snd_seq_queue *queue; | |
1749 | struct snd_seq_timer *tmr; | |
1da177e4 LT |
1750 | |
1751 | if (copy_from_user(&timer, arg, sizeof(timer))) | |
1752 | return -EFAULT; | |
1753 | ||
1754 | queue = queueptr(timer.queue); | |
1755 | if (queue == NULL) | |
1756 | return -EINVAL; | |
1757 | ||
1a60d4c5 | 1758 | if (mutex_lock_interruptible(&queue->timer_mutex)) { |
1da177e4 LT |
1759 | queuefree(queue); |
1760 | return -ERESTARTSYS; | |
1761 | } | |
1762 | tmr = queue->timer; | |
1763 | memset(&timer, 0, sizeof(timer)); | |
1764 | timer.queue = queue->queue; | |
1765 | ||
1766 | timer.type = tmr->type; | |
1767 | if (tmr->type == SNDRV_SEQ_TIMER_ALSA) { | |
1768 | timer.u.alsa.id = tmr->alsa_id; | |
1769 | timer.u.alsa.resolution = tmr->preferred_resolution; | |
1770 | } | |
1a60d4c5 | 1771 | mutex_unlock(&queue->timer_mutex); |
1da177e4 LT |
1772 | queuefree(queue); |
1773 | ||
1774 | if (copy_to_user(arg, &timer, sizeof(timer))) | |
1775 | return -EFAULT; | |
1776 | return 0; | |
1777 | } | |
1778 | ||
1779 | ||
1780 | /* SET_QUEUE_TIMER ioctl() */ | |
c7e0b5bf TI |
1781 | static int snd_seq_ioctl_set_queue_timer(struct snd_seq_client *client, |
1782 | void __user *arg) | |
1da177e4 LT |
1783 | { |
1784 | int result = 0; | |
c7e0b5bf | 1785 | struct snd_seq_queue_timer timer; |
1da177e4 LT |
1786 | |
1787 | if (copy_from_user(&timer, arg, sizeof(timer))) | |
1788 | return -EFAULT; | |
1789 | ||
1790 | if (timer.type != SNDRV_SEQ_TIMER_ALSA) | |
1791 | return -EINVAL; | |
1792 | ||
1793 | if (snd_seq_queue_check_access(timer.queue, client->number)) { | |
c7e0b5bf TI |
1794 | struct snd_seq_queue *q; |
1795 | struct snd_seq_timer *tmr; | |
1da177e4 LT |
1796 | |
1797 | q = queueptr(timer.queue); | |
1798 | if (q == NULL) | |
1799 | return -ENXIO; | |
1a60d4c5 | 1800 | if (mutex_lock_interruptible(&q->timer_mutex)) { |
1da177e4 LT |
1801 | queuefree(q); |
1802 | return -ERESTARTSYS; | |
1803 | } | |
1804 | tmr = q->timer; | |
1805 | snd_seq_queue_timer_close(timer.queue); | |
1806 | tmr->type = timer.type; | |
1807 | if (tmr->type == SNDRV_SEQ_TIMER_ALSA) { | |
1808 | tmr->alsa_id = timer.u.alsa.id; | |
1809 | tmr->preferred_resolution = timer.u.alsa.resolution; | |
1810 | } | |
1811 | result = snd_seq_queue_timer_open(timer.queue); | |
1a60d4c5 | 1812 | mutex_unlock(&q->timer_mutex); |
1da177e4 LT |
1813 | queuefree(q); |
1814 | } else { | |
1815 | return -EPERM; | |
1816 | } | |
1817 | ||
1818 | return result; | |
1819 | } | |
1820 | ||
1821 | ||
1822 | /* GET_QUEUE_CLIENT ioctl() */ | |
c7e0b5bf TI |
1823 | static int snd_seq_ioctl_get_queue_client(struct snd_seq_client *client, |
1824 | void __user *arg) | |
1da177e4 | 1825 | { |
c7e0b5bf | 1826 | struct snd_seq_queue_client info; |
1da177e4 LT |
1827 | int used; |
1828 | ||
1829 | if (copy_from_user(&info, arg, sizeof(info))) | |
1830 | return -EFAULT; | |
1831 | ||
1832 | used = snd_seq_queue_is_used(info.queue, client->number); | |
1833 | if (used < 0) | |
1834 | return -EINVAL; | |
1835 | info.used = used; | |
1836 | info.client = client->number; | |
1837 | ||
1838 | if (copy_to_user(arg, &info, sizeof(info))) | |
1839 | return -EFAULT; | |
1840 | return 0; | |
1841 | } | |
1842 | ||
1843 | ||
1844 | /* SET_QUEUE_CLIENT ioctl() */ | |
c7e0b5bf TI |
1845 | static int snd_seq_ioctl_set_queue_client(struct snd_seq_client *client, |
1846 | void __user *arg) | |
1da177e4 LT |
1847 | { |
1848 | int err; | |
c7e0b5bf | 1849 | struct snd_seq_queue_client info; |
1da177e4 LT |
1850 | |
1851 | if (copy_from_user(&info, arg, sizeof(info))) | |
1852 | return -EFAULT; | |
1853 | ||
1854 | if (info.used >= 0) { | |
1855 | err = snd_seq_queue_use(info.queue, client->number, info.used); | |
1856 | if (err < 0) | |
1857 | return err; | |
1858 | } | |
1859 | ||
1860 | return snd_seq_ioctl_get_queue_client(client, arg); | |
1861 | } | |
1862 | ||
1863 | ||
1864 | /* GET_CLIENT_POOL ioctl() */ | |
c7e0b5bf TI |
1865 | static int snd_seq_ioctl_get_client_pool(struct snd_seq_client *client, |
1866 | void __user *arg) | |
1da177e4 | 1867 | { |
c7e0b5bf TI |
1868 | struct snd_seq_client_pool info; |
1869 | struct snd_seq_client *cptr; | |
1da177e4 LT |
1870 | |
1871 | if (copy_from_user(&info, arg, sizeof(info))) | |
1872 | return -EFAULT; | |
1873 | ||
1874 | cptr = snd_seq_client_use_ptr(info.client); | |
1875 | if (cptr == NULL) | |
1876 | return -ENOENT; | |
1877 | memset(&info, 0, sizeof(info)); | |
1878 | info.output_pool = cptr->pool->size; | |
1879 | info.output_room = cptr->pool->room; | |
1880 | info.output_free = info.output_pool; | |
e64d2e36 | 1881 | info.output_free = snd_seq_unused_cells(cptr->pool); |
1da177e4 LT |
1882 | if (cptr->type == USER_CLIENT) { |
1883 | info.input_pool = cptr->data.user.fifo_pool_size; | |
1884 | info.input_free = info.input_pool; | |
1885 | if (cptr->data.user.fifo) | |
1886 | info.input_free = snd_seq_unused_cells(cptr->data.user.fifo->pool); | |
1887 | } else { | |
1888 | info.input_pool = 0; | |
1889 | info.input_free = 0; | |
1890 | } | |
1891 | snd_seq_client_unlock(cptr); | |
1892 | ||
1893 | if (copy_to_user(arg, &info, sizeof(info))) | |
1894 | return -EFAULT; | |
1895 | return 0; | |
1896 | } | |
1897 | ||
1898 | /* SET_CLIENT_POOL ioctl() */ | |
c7e0b5bf TI |
1899 | static int snd_seq_ioctl_set_client_pool(struct snd_seq_client *client, |
1900 | void __user *arg) | |
1da177e4 | 1901 | { |
c7e0b5bf | 1902 | struct snd_seq_client_pool info; |
1da177e4 LT |
1903 | int rc; |
1904 | ||
1905 | if (copy_from_user(&info, arg, sizeof(info))) | |
1906 | return -EFAULT; | |
1907 | ||
1908 | if (client->number != info.client) | |
1909 | return -EINVAL; /* can't change other clients */ | |
1910 | ||
1911 | if (info.output_pool >= 1 && info.output_pool <= SNDRV_SEQ_MAX_EVENTS && | |
1912 | (! snd_seq_write_pool_allocated(client) || | |
1913 | info.output_pool != client->pool->size)) { | |
1914 | if (snd_seq_write_pool_allocated(client)) { | |
1915 | /* remove all existing cells */ | |
2dbb155d | 1916 | snd_seq_pool_mark_closing(client->pool); |
1da177e4 LT |
1917 | snd_seq_queue_client_leave_cells(client->number); |
1918 | snd_seq_pool_done(client->pool); | |
1919 | } | |
1920 | client->pool->size = info.output_pool; | |
1921 | rc = snd_seq_pool_init(client->pool); | |
1922 | if (rc < 0) | |
1923 | return rc; | |
1924 | } | |
1925 | if (client->type == USER_CLIENT && client->data.user.fifo != NULL && | |
1926 | info.input_pool >= 1 && | |
1927 | info.input_pool <= SNDRV_SEQ_MAX_CLIENT_EVENTS && | |
1928 | info.input_pool != client->data.user.fifo_pool_size) { | |
1929 | /* change pool size */ | |
1930 | rc = snd_seq_fifo_resize(client->data.user.fifo, info.input_pool); | |
1931 | if (rc < 0) | |
1932 | return rc; | |
1933 | client->data.user.fifo_pool_size = info.input_pool; | |
1934 | } | |
1935 | if (info.output_room >= 1 && | |
1936 | info.output_room <= client->pool->size) { | |
1937 | client->pool->room = info.output_room; | |
1938 | } | |
1939 | ||
1940 | return snd_seq_ioctl_get_client_pool(client, arg); | |
1941 | } | |
1942 | ||
1943 | ||
1944 | /* REMOVE_EVENTS ioctl() */ | |
c7e0b5bf TI |
1945 | static int snd_seq_ioctl_remove_events(struct snd_seq_client *client, |
1946 | void __user *arg) | |
1da177e4 | 1947 | { |
c7e0b5bf | 1948 | struct snd_seq_remove_events info; |
1da177e4 LT |
1949 | |
1950 | if (copy_from_user(&info, arg, sizeof(info))) | |
1951 | return -EFAULT; | |
1952 | ||
1953 | /* | |
1954 | * Input mostly not implemented XXX. | |
1955 | */ | |
1956 | if (info.remove_mode & SNDRV_SEQ_REMOVE_INPUT) { | |
1957 | /* | |
1958 | * No restrictions so for a user client we can clear | |
1959 | * the whole fifo | |
1960 | */ | |
b85a6198 | 1961 | if (client->type == USER_CLIENT && client->data.user.fifo) |
1da177e4 LT |
1962 | snd_seq_fifo_clear(client->data.user.fifo); |
1963 | } | |
1964 | ||
1965 | if (info.remove_mode & SNDRV_SEQ_REMOVE_OUTPUT) | |
1966 | snd_seq_queue_remove_cells(client->number, &info); | |
1967 | ||
1968 | return 0; | |
1969 | } | |
1970 | ||
1971 | ||
1972 | /* | |
1973 | * get subscription info | |
1974 | */ | |
c7e0b5bf TI |
1975 | static int snd_seq_ioctl_get_subscription(struct snd_seq_client *client, |
1976 | void __user *arg) | |
1da177e4 LT |
1977 | { |
1978 | int result; | |
c7e0b5bf TI |
1979 | struct snd_seq_client *sender = NULL; |
1980 | struct snd_seq_client_port *sport = NULL; | |
1981 | struct snd_seq_port_subscribe subs; | |
1982 | struct snd_seq_subscribers *p; | |
1da177e4 LT |
1983 | |
1984 | if (copy_from_user(&subs, arg, sizeof(subs))) | |
1985 | return -EFAULT; | |
1986 | ||
1987 | result = -EINVAL; | |
1988 | if ((sender = snd_seq_client_use_ptr(subs.sender.client)) == NULL) | |
1989 | goto __end; | |
1990 | if ((sport = snd_seq_port_use_ptr(sender, subs.sender.port)) == NULL) | |
1991 | goto __end; | |
1992 | p = snd_seq_port_get_subscription(&sport->c_src, &subs.dest); | |
1993 | if (p) { | |
1994 | result = 0; | |
1995 | subs = p->info; | |
1996 | } else | |
1997 | result = -ENOENT; | |
1998 | ||
1999 | __end: | |
2000 | if (sport) | |
2001 | snd_seq_port_unlock(sport); | |
2002 | if (sender) | |
2003 | snd_seq_client_unlock(sender); | |
2004 | if (result >= 0) { | |
2005 | if (copy_to_user(arg, &subs, sizeof(subs))) | |
2006 | return -EFAULT; | |
2007 | } | |
2008 | return result; | |
2009 | } | |
2010 | ||
2011 | ||
2012 | /* | |
2013 | * get subscription info - check only its presence | |
2014 | */ | |
c7e0b5bf TI |
2015 | static int snd_seq_ioctl_query_subs(struct snd_seq_client *client, |
2016 | void __user *arg) | |
1da177e4 LT |
2017 | { |
2018 | int result = -ENXIO; | |
c7e0b5bf TI |
2019 | struct snd_seq_client *cptr = NULL; |
2020 | struct snd_seq_client_port *port = NULL; | |
2021 | struct snd_seq_query_subs subs; | |
2022 | struct snd_seq_port_subs_info *group; | |
1da177e4 LT |
2023 | struct list_head *p; |
2024 | int i; | |
2025 | ||
2026 | if (copy_from_user(&subs, arg, sizeof(subs))) | |
2027 | return -EFAULT; | |
2028 | ||
2029 | if ((cptr = snd_seq_client_use_ptr(subs.root.client)) == NULL) | |
2030 | goto __end; | |
2031 | if ((port = snd_seq_port_use_ptr(cptr, subs.root.port)) == NULL) | |
2032 | goto __end; | |
2033 | ||
2034 | switch (subs.type) { | |
2035 | case SNDRV_SEQ_QUERY_SUBS_READ: | |
2036 | group = &port->c_src; | |
2037 | break; | |
2038 | case SNDRV_SEQ_QUERY_SUBS_WRITE: | |
2039 | group = &port->c_dest; | |
2040 | break; | |
2041 | default: | |
2042 | goto __end; | |
2043 | } | |
2044 | ||
2045 | down_read(&group->list_mutex); | |
2046 | /* search for the subscriber */ | |
2047 | subs.num_subs = group->count; | |
2048 | i = 0; | |
2049 | result = -ENOENT; | |
2050 | list_for_each(p, &group->list_head) { | |
2051 | if (i++ == subs.index) { | |
2052 | /* found! */ | |
c7e0b5bf | 2053 | struct snd_seq_subscribers *s; |
1da177e4 | 2054 | if (subs.type == SNDRV_SEQ_QUERY_SUBS_READ) { |
c7e0b5bf | 2055 | s = list_entry(p, struct snd_seq_subscribers, src_list); |
1da177e4 LT |
2056 | subs.addr = s->info.dest; |
2057 | } else { | |
c7e0b5bf | 2058 | s = list_entry(p, struct snd_seq_subscribers, dest_list); |
1da177e4 LT |
2059 | subs.addr = s->info.sender; |
2060 | } | |
2061 | subs.flags = s->info.flags; | |
2062 | subs.queue = s->info.queue; | |
2063 | result = 0; | |
2064 | break; | |
2065 | } | |
2066 | } | |
2067 | up_read(&group->list_mutex); | |
2068 | ||
2069 | __end: | |
2070 | if (port) | |
2071 | snd_seq_port_unlock(port); | |
2072 | if (cptr) | |
2073 | snd_seq_client_unlock(cptr); | |
2074 | if (result >= 0) { | |
2075 | if (copy_to_user(arg, &subs, sizeof(subs))) | |
2076 | return -EFAULT; | |
2077 | } | |
2078 | return result; | |
2079 | } | |
2080 | ||
2081 | ||
2082 | /* | |
2083 | * query next client | |
2084 | */ | |
c7e0b5bf TI |
2085 | static int snd_seq_ioctl_query_next_client(struct snd_seq_client *client, |
2086 | void __user *arg) | |
1da177e4 | 2087 | { |
c7e0b5bf TI |
2088 | struct snd_seq_client *cptr = NULL; |
2089 | struct snd_seq_client_info info; | |
1da177e4 LT |
2090 | |
2091 | if (copy_from_user(&info, arg, sizeof(info))) | |
2092 | return -EFAULT; | |
2093 | ||
2094 | /* search for next client */ | |
2095 | info.client++; | |
2096 | if (info.client < 0) | |
2097 | info.client = 0; | |
2098 | for (; info.client < SNDRV_SEQ_MAX_CLIENTS; info.client++) { | |
2099 | cptr = snd_seq_client_use_ptr(info.client); | |
2100 | if (cptr) | |
2101 | break; /* found */ | |
2102 | } | |
2103 | if (cptr == NULL) | |
2104 | return -ENOENT; | |
2105 | ||
2106 | get_client_info(cptr, &info); | |
2107 | snd_seq_client_unlock(cptr); | |
2108 | ||
2109 | if (copy_to_user(arg, &info, sizeof(info))) | |
2110 | return -EFAULT; | |
2111 | return 0; | |
2112 | } | |
2113 | ||
2114 | /* | |
2115 | * query next port | |
2116 | */ | |
c7e0b5bf TI |
2117 | static int snd_seq_ioctl_query_next_port(struct snd_seq_client *client, |
2118 | void __user *arg) | |
1da177e4 | 2119 | { |
c7e0b5bf TI |
2120 | struct snd_seq_client *cptr; |
2121 | struct snd_seq_client_port *port = NULL; | |
2122 | struct snd_seq_port_info info; | |
1da177e4 LT |
2123 | |
2124 | if (copy_from_user(&info, arg, sizeof(info))) | |
2125 | return -EFAULT; | |
2126 | cptr = snd_seq_client_use_ptr(info.addr.client); | |
2127 | if (cptr == NULL) | |
2128 | return -ENXIO; | |
2129 | ||
2130 | /* search for next port */ | |
2131 | info.addr.port++; | |
2132 | port = snd_seq_port_query_nearest(cptr, &info); | |
2133 | if (port == NULL) { | |
2134 | snd_seq_client_unlock(cptr); | |
2135 | return -ENOENT; | |
2136 | } | |
2137 | ||
2138 | /* get port info */ | |
2139 | info.addr = port->addr; | |
2140 | snd_seq_get_port_info(port, &info); | |
2141 | snd_seq_port_unlock(port); | |
2142 | snd_seq_client_unlock(cptr); | |
2143 | ||
2144 | if (copy_to_user(arg, &info, sizeof(info))) | |
2145 | return -EFAULT; | |
2146 | return 0; | |
2147 | } | |
2148 | ||
2149 | /* -------------------------------------------------------- */ | |
2150 | ||
2151 | static struct seq_ioctl_table { | |
2152 | unsigned int cmd; | |
c7e0b5bf | 2153 | int (*func)(struct snd_seq_client *client, void __user * arg); |
1da177e4 LT |
2154 | } ioctl_tables[] = { |
2155 | { SNDRV_SEQ_IOCTL_SYSTEM_INFO, snd_seq_ioctl_system_info }, | |
2156 | { SNDRV_SEQ_IOCTL_RUNNING_MODE, snd_seq_ioctl_running_mode }, | |
2157 | { SNDRV_SEQ_IOCTL_GET_CLIENT_INFO, snd_seq_ioctl_get_client_info }, | |
2158 | { SNDRV_SEQ_IOCTL_SET_CLIENT_INFO, snd_seq_ioctl_set_client_info }, | |
2159 | { SNDRV_SEQ_IOCTL_CREATE_PORT, snd_seq_ioctl_create_port }, | |
2160 | { SNDRV_SEQ_IOCTL_DELETE_PORT, snd_seq_ioctl_delete_port }, | |
2161 | { SNDRV_SEQ_IOCTL_GET_PORT_INFO, snd_seq_ioctl_get_port_info }, | |
2162 | { SNDRV_SEQ_IOCTL_SET_PORT_INFO, snd_seq_ioctl_set_port_info }, | |
2163 | { SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT, snd_seq_ioctl_subscribe_port }, | |
2164 | { SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT, snd_seq_ioctl_unsubscribe_port }, | |
2165 | { SNDRV_SEQ_IOCTL_CREATE_QUEUE, snd_seq_ioctl_create_queue }, | |
2166 | { SNDRV_SEQ_IOCTL_DELETE_QUEUE, snd_seq_ioctl_delete_queue }, | |
2167 | { SNDRV_SEQ_IOCTL_GET_QUEUE_INFO, snd_seq_ioctl_get_queue_info }, | |
2168 | { SNDRV_SEQ_IOCTL_SET_QUEUE_INFO, snd_seq_ioctl_set_queue_info }, | |
2169 | { SNDRV_SEQ_IOCTL_GET_NAMED_QUEUE, snd_seq_ioctl_get_named_queue }, | |
2170 | { SNDRV_SEQ_IOCTL_GET_QUEUE_STATUS, snd_seq_ioctl_get_queue_status }, | |
2171 | { SNDRV_SEQ_IOCTL_GET_QUEUE_TEMPO, snd_seq_ioctl_get_queue_tempo }, | |
2172 | { SNDRV_SEQ_IOCTL_SET_QUEUE_TEMPO, snd_seq_ioctl_set_queue_tempo }, | |
2173 | { SNDRV_SEQ_IOCTL_GET_QUEUE_TIMER, snd_seq_ioctl_get_queue_timer }, | |
2174 | { SNDRV_SEQ_IOCTL_SET_QUEUE_TIMER, snd_seq_ioctl_set_queue_timer }, | |
2175 | { SNDRV_SEQ_IOCTL_GET_QUEUE_CLIENT, snd_seq_ioctl_get_queue_client }, | |
2176 | { SNDRV_SEQ_IOCTL_SET_QUEUE_CLIENT, snd_seq_ioctl_set_queue_client }, | |
2177 | { SNDRV_SEQ_IOCTL_GET_CLIENT_POOL, snd_seq_ioctl_get_client_pool }, | |
2178 | { SNDRV_SEQ_IOCTL_SET_CLIENT_POOL, snd_seq_ioctl_set_client_pool }, | |
2179 | { SNDRV_SEQ_IOCTL_GET_SUBSCRIPTION, snd_seq_ioctl_get_subscription }, | |
2180 | { SNDRV_SEQ_IOCTL_QUERY_NEXT_CLIENT, snd_seq_ioctl_query_next_client }, | |
2181 | { SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT, snd_seq_ioctl_query_next_port }, | |
2182 | { SNDRV_SEQ_IOCTL_REMOVE_EVENTS, snd_seq_ioctl_remove_events }, | |
2183 | { SNDRV_SEQ_IOCTL_QUERY_SUBS, snd_seq_ioctl_query_subs }, | |
2184 | { 0, NULL }, | |
2185 | }; | |
2186 | ||
c7e0b5bf TI |
2187 | static int snd_seq_do_ioctl(struct snd_seq_client *client, unsigned int cmd, |
2188 | void __user *arg) | |
1da177e4 LT |
2189 | { |
2190 | struct seq_ioctl_table *p; | |
2191 | ||
2192 | switch (cmd) { | |
2193 | case SNDRV_SEQ_IOCTL_PVERSION: | |
2194 | /* return sequencer version number */ | |
2195 | return put_user(SNDRV_SEQ_VERSION, (int __user *)arg) ? -EFAULT : 0; | |
2196 | case SNDRV_SEQ_IOCTL_CLIENT_ID: | |
2197 | /* return the id of this client */ | |
2198 | return put_user(client->number, (int __user *)arg) ? -EFAULT : 0; | |
2199 | } | |
2200 | ||
2201 | if (! arg) | |
2202 | return -EFAULT; | |
2203 | for (p = ioctl_tables; p->cmd; p++) { | |
2204 | if (p->cmd == cmd) | |
2205 | return p->func(client, arg); | |
2206 | } | |
c85a4004 | 2207 | snd_printd("seq unknown ioctl() 0x%x (type='%c', number=0x%02x)\n", |
1da177e4 LT |
2208 | cmd, _IOC_TYPE(cmd), _IOC_NR(cmd)); |
2209 | return -ENOTTY; | |
2210 | } | |
2211 | ||
2212 | ||
2213 | static long snd_seq_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
2214 | { | |
c7e0b5bf | 2215 | struct snd_seq_client *client = file->private_data; |
1da177e4 | 2216 | |
7eaa943c TI |
2217 | if (snd_BUG_ON(!client)) |
2218 | return -ENXIO; | |
1da177e4 LT |
2219 | |
2220 | return snd_seq_do_ioctl(client, cmd, (void __user *) arg); | |
2221 | } | |
2222 | ||
2223 | #ifdef CONFIG_COMPAT | |
2224 | #include "seq_compat.c" | |
2225 | #else | |
2226 | #define snd_seq_ioctl_compat NULL | |
2227 | #endif | |
2228 | ||
2229 | /* -------------------------------------------------------- */ | |
2230 | ||
2231 | ||
2232 | /* exported to kernel modules */ | |
7b6d9245 CL |
2233 | int snd_seq_create_kernel_client(struct snd_card *card, int client_index, |
2234 | const char *name_fmt, ...) | |
1da177e4 | 2235 | { |
c7e0b5bf | 2236 | struct snd_seq_client *client; |
7b6d9245 | 2237 | va_list args; |
1da177e4 | 2238 | |
7eaa943c TI |
2239 | if (snd_BUG_ON(in_interrupt())) |
2240 | return -EBUSY; | |
1da177e4 | 2241 | |
aa1e77e6 | 2242 | if (card && client_index >= SNDRV_SEQ_CLIENTS_PER_CARD) |
1da177e4 | 2243 | return -EINVAL; |
aa1e77e6 | 2244 | if (card == NULL && client_index >= SNDRV_SEQ_GLOBAL_CLIENTS) |
1da177e4 | 2245 | return -EINVAL; |
1da177e4 | 2246 | |
1a60d4c5 | 2247 | if (mutex_lock_interruptible(®ister_mutex)) |
1da177e4 | 2248 | return -ERESTARTSYS; |
d001544d CL |
2249 | |
2250 | if (card) { | |
aa1e77e6 CL |
2251 | client_index += SNDRV_SEQ_GLOBAL_CLIENTS |
2252 | + card->number * SNDRV_SEQ_CLIENTS_PER_CARD; | |
2253 | if (client_index >= SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN) | |
d001544d CL |
2254 | client_index = -1; |
2255 | } | |
2256 | ||
1da177e4 | 2257 | /* empty write queue as default */ |
aa1e77e6 | 2258 | client = seq_create_client1(client_index, 0); |
1da177e4 | 2259 | if (client == NULL) { |
1a60d4c5 | 2260 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
2261 | return -EBUSY; /* failure code */ |
2262 | } | |
2263 | usage_alloc(&client_usage, 1); | |
2264 | ||
83e8ad69 CL |
2265 | client->accept_input = 1; |
2266 | client->accept_output = 1; | |
1da177e4 | 2267 | |
7b6d9245 CL |
2268 | va_start(args, name_fmt); |
2269 | vsnprintf(client->name, sizeof(client->name), name_fmt, args); | |
2270 | va_end(args); | |
1da177e4 LT |
2271 | |
2272 | client->type = KERNEL_CLIENT; | |
1a60d4c5 | 2273 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
2274 | |
2275 | /* make others aware this new client */ | |
2276 | snd_seq_system_client_ev_client_start(client->number); | |
2277 | ||
2278 | /* return client number to caller */ | |
2279 | return client->number; | |
2280 | } | |
2281 | ||
91715ed9 TI |
2282 | EXPORT_SYMBOL(snd_seq_create_kernel_client); |
2283 | ||
1da177e4 LT |
2284 | /* exported to kernel modules */ |
2285 | int snd_seq_delete_kernel_client(int client) | |
2286 | { | |
c7e0b5bf | 2287 | struct snd_seq_client *ptr; |
1da177e4 | 2288 | |
7eaa943c TI |
2289 | if (snd_BUG_ON(in_interrupt())) |
2290 | return -EBUSY; | |
1da177e4 LT |
2291 | |
2292 | ptr = clientptr(client); | |
2293 | if (ptr == NULL) | |
2294 | return -EINVAL; | |
2295 | ||
2296 | seq_free_client(ptr); | |
2297 | kfree(ptr); | |
2298 | return 0; | |
2299 | } | |
2300 | ||
91715ed9 | 2301 | EXPORT_SYMBOL(snd_seq_delete_kernel_client); |
1da177e4 LT |
2302 | |
2303 | /* skeleton to enqueue event, called from snd_seq_kernel_client_enqueue | |
2304 | * and snd_seq_kernel_client_enqueue_blocking | |
2305 | */ | |
c7e0b5bf | 2306 | static int kernel_client_enqueue(int client, struct snd_seq_event *ev, |
1da177e4 LT |
2307 | struct file *file, int blocking, |
2308 | int atomic, int hop) | |
2309 | { | |
c7e0b5bf | 2310 | struct snd_seq_client *cptr; |
1da177e4 LT |
2311 | int result; |
2312 | ||
7eaa943c TI |
2313 | if (snd_BUG_ON(!ev)) |
2314 | return -EINVAL; | |
1da177e4 LT |
2315 | |
2316 | if (ev->type == SNDRV_SEQ_EVENT_NONE) | |
2317 | return 0; /* ignore this */ | |
2318 | if (ev->type == SNDRV_SEQ_EVENT_KERNEL_ERROR) | |
2319 | return -EINVAL; /* quoted events can't be enqueued */ | |
2320 | ||
2321 | /* fill in client number */ | |
2322 | ev->source.client = client; | |
2323 | ||
2324 | if (check_event_type_and_length(ev)) | |
2325 | return -EINVAL; | |
2326 | ||
2327 | cptr = snd_seq_client_use_ptr(client); | |
2328 | if (cptr == NULL) | |
2329 | return -EINVAL; | |
2330 | ||
2331 | if (! cptr->accept_output) | |
2332 | result = -EPERM; | |
2333 | else /* send it */ | |
2334 | result = snd_seq_client_enqueue_event(cptr, ev, file, blocking, atomic, hop); | |
2335 | ||
2336 | snd_seq_client_unlock(cptr); | |
2337 | return result; | |
2338 | } | |
2339 | ||
2340 | /* | |
2341 | * exported, called by kernel clients to enqueue events (w/o blocking) | |
2342 | * | |
2343 | * RETURN VALUE: zero if succeed, negative if error | |
2344 | */ | |
c7e0b5bf | 2345 | int snd_seq_kernel_client_enqueue(int client, struct snd_seq_event * ev, |
1da177e4 LT |
2346 | int atomic, int hop) |
2347 | { | |
2348 | return kernel_client_enqueue(client, ev, NULL, 0, atomic, hop); | |
2349 | } | |
2350 | ||
91715ed9 TI |
2351 | EXPORT_SYMBOL(snd_seq_kernel_client_enqueue); |
2352 | ||
1da177e4 LT |
2353 | /* |
2354 | * exported, called by kernel clients to enqueue events (with blocking) | |
2355 | * | |
2356 | * RETURN VALUE: zero if succeed, negative if error | |
2357 | */ | |
c7e0b5bf | 2358 | int snd_seq_kernel_client_enqueue_blocking(int client, struct snd_seq_event * ev, |
1da177e4 LT |
2359 | struct file *file, |
2360 | int atomic, int hop) | |
2361 | { | |
2362 | return kernel_client_enqueue(client, ev, file, 1, atomic, hop); | |
2363 | } | |
2364 | ||
91715ed9 | 2365 | EXPORT_SYMBOL(snd_seq_kernel_client_enqueue_blocking); |
1da177e4 LT |
2366 | |
2367 | /* | |
2368 | * exported, called by kernel clients to dispatch events directly to other | |
2369 | * clients, bypassing the queues. Event time-stamp will be updated. | |
2370 | * | |
2371 | * RETURN VALUE: negative = delivery failed, | |
2372 | * zero, or positive: the number of delivered events | |
2373 | */ | |
c7e0b5bf | 2374 | int snd_seq_kernel_client_dispatch(int client, struct snd_seq_event * ev, |
1da177e4 LT |
2375 | int atomic, int hop) |
2376 | { | |
c7e0b5bf | 2377 | struct snd_seq_client *cptr; |
1da177e4 LT |
2378 | int result; |
2379 | ||
7eaa943c TI |
2380 | if (snd_BUG_ON(!ev)) |
2381 | return -EINVAL; | |
1da177e4 LT |
2382 | |
2383 | /* fill in client number */ | |
2384 | ev->queue = SNDRV_SEQ_QUEUE_DIRECT; | |
2385 | ev->source.client = client; | |
2386 | ||
2387 | if (check_event_type_and_length(ev)) | |
2388 | return -EINVAL; | |
2389 | ||
2390 | cptr = snd_seq_client_use_ptr(client); | |
2391 | if (cptr == NULL) | |
2392 | return -EINVAL; | |
2393 | ||
2394 | if (!cptr->accept_output) | |
2395 | result = -EPERM; | |
2396 | else | |
2397 | result = snd_seq_deliver_event(cptr, ev, atomic, hop); | |
2398 | ||
2399 | snd_seq_client_unlock(cptr); | |
2400 | return result; | |
2401 | } | |
2402 | ||
91715ed9 | 2403 | EXPORT_SYMBOL(snd_seq_kernel_client_dispatch); |
1da177e4 LT |
2404 | |
2405 | /* | |
2406 | * exported, called by kernel clients to perform same functions as with | |
2407 | * userland ioctl() | |
2408 | */ | |
2409 | int snd_seq_kernel_client_ctl(int clientid, unsigned int cmd, void *arg) | |
2410 | { | |
c7e0b5bf | 2411 | struct snd_seq_client *client; |
1da177e4 LT |
2412 | mm_segment_t fs; |
2413 | int result; | |
2414 | ||
2415 | client = clientptr(clientid); | |
2416 | if (client == NULL) | |
2417 | return -ENXIO; | |
2418 | fs = snd_enter_user(); | |
fea952e5 | 2419 | result = snd_seq_do_ioctl(client, cmd, (void __force __user *)arg); |
1da177e4 LT |
2420 | snd_leave_user(fs); |
2421 | return result; | |
2422 | } | |
2423 | ||
91715ed9 | 2424 | EXPORT_SYMBOL(snd_seq_kernel_client_ctl); |
1da177e4 LT |
2425 | |
2426 | /* exported (for OSS emulator) */ | |
2427 | int snd_seq_kernel_client_write_poll(int clientid, struct file *file, poll_table *wait) | |
2428 | { | |
c7e0b5bf | 2429 | struct snd_seq_client *client; |
1da177e4 LT |
2430 | |
2431 | client = clientptr(clientid); | |
2432 | if (client == NULL) | |
2433 | return -ENXIO; | |
2434 | ||
2435 | if (! snd_seq_write_pool_allocated(client)) | |
2436 | return 1; | |
2437 | if (snd_seq_pool_poll_wait(client->pool, file, wait)) | |
2438 | return 1; | |
2439 | return 0; | |
2440 | } | |
2441 | ||
91715ed9 TI |
2442 | EXPORT_SYMBOL(snd_seq_kernel_client_write_poll); |
2443 | ||
1da177e4 LT |
2444 | /*---------------------------------------------------------------------------*/ |
2445 | ||
04f141a8 | 2446 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
2447 | /* |
2448 | * /proc interface | |
2449 | */ | |
c7e0b5bf TI |
2450 | static void snd_seq_info_dump_subscribers(struct snd_info_buffer *buffer, |
2451 | struct snd_seq_port_subs_info *group, | |
2452 | int is_src, char *msg) | |
1da177e4 LT |
2453 | { |
2454 | struct list_head *p; | |
c7e0b5bf | 2455 | struct snd_seq_subscribers *s; |
1da177e4 LT |
2456 | int count = 0; |
2457 | ||
2458 | down_read(&group->list_mutex); | |
2459 | if (list_empty(&group->list_head)) { | |
2460 | up_read(&group->list_mutex); | |
2461 | return; | |
2462 | } | |
2463 | snd_iprintf(buffer, msg); | |
2464 | list_for_each(p, &group->list_head) { | |
2465 | if (is_src) | |
c7e0b5bf | 2466 | s = list_entry(p, struct snd_seq_subscribers, src_list); |
1da177e4 | 2467 | else |
c7e0b5bf | 2468 | s = list_entry(p, struct snd_seq_subscribers, dest_list); |
1da177e4 LT |
2469 | if (count++) |
2470 | snd_iprintf(buffer, ", "); | |
2471 | snd_iprintf(buffer, "%d:%d", | |
2472 | is_src ? s->info.dest.client : s->info.sender.client, | |
2473 | is_src ? s->info.dest.port : s->info.sender.port); | |
2474 | if (s->info.flags & SNDRV_SEQ_PORT_SUBS_TIMESTAMP) | |
2475 | snd_iprintf(buffer, "[%c:%d]", ((s->info.flags & SNDRV_SEQ_PORT_SUBS_TIME_REAL) ? 'r' : 't'), s->info.queue); | |
2476 | if (group->exclusive) | |
2477 | snd_iprintf(buffer, "[ex]"); | |
2478 | } | |
2479 | up_read(&group->list_mutex); | |
2480 | snd_iprintf(buffer, "\n"); | |
2481 | } | |
2482 | ||
2483 | #define FLAG_PERM_RD(perm) ((perm) & SNDRV_SEQ_PORT_CAP_READ ? ((perm) & SNDRV_SEQ_PORT_CAP_SUBS_READ ? 'R' : 'r') : '-') | |
2484 | #define FLAG_PERM_WR(perm) ((perm) & SNDRV_SEQ_PORT_CAP_WRITE ? ((perm) & SNDRV_SEQ_PORT_CAP_SUBS_WRITE ? 'W' : 'w') : '-') | |
2485 | #define FLAG_PERM_EX(perm) ((perm) & SNDRV_SEQ_PORT_CAP_NO_EXPORT ? '-' : 'e') | |
2486 | ||
2487 | #define FLAG_PERM_DUPLEX(perm) ((perm) & SNDRV_SEQ_PORT_CAP_DUPLEX ? 'X' : '-') | |
2488 | ||
c7e0b5bf TI |
2489 | static void snd_seq_info_dump_ports(struct snd_info_buffer *buffer, |
2490 | struct snd_seq_client *client) | |
1da177e4 | 2491 | { |
9244b2c3 | 2492 | struct snd_seq_client_port *p; |
1da177e4 | 2493 | |
1a60d4c5 | 2494 | mutex_lock(&client->ports_mutex); |
9244b2c3 | 2495 | list_for_each_entry(p, &client->ports_list_head, list) { |
1da177e4 LT |
2496 | snd_iprintf(buffer, " Port %3d : \"%s\" (%c%c%c%c)\n", |
2497 | p->addr.port, p->name, | |
2498 | FLAG_PERM_RD(p->capability), | |
2499 | FLAG_PERM_WR(p->capability), | |
2500 | FLAG_PERM_EX(p->capability), | |
2501 | FLAG_PERM_DUPLEX(p->capability)); | |
2502 | snd_seq_info_dump_subscribers(buffer, &p->c_src, 1, " Connecting To: "); | |
2503 | snd_seq_info_dump_subscribers(buffer, &p->c_dest, 0, " Connected From: "); | |
2504 | } | |
1a60d4c5 | 2505 | mutex_unlock(&client->ports_mutex); |
1da177e4 LT |
2506 | } |
2507 | ||
2508 | ||
2509 | /* exported to seq_info.c */ | |
c7e0b5bf TI |
2510 | void snd_seq_info_clients_read(struct snd_info_entry *entry, |
2511 | struct snd_info_buffer *buffer) | |
1da177e4 | 2512 | { |
1da177e4 | 2513 | int c; |
c7e0b5bf | 2514 | struct snd_seq_client *client; |
1da177e4 LT |
2515 | |
2516 | snd_iprintf(buffer, "Client info\n"); | |
2517 | snd_iprintf(buffer, " cur clients : %d\n", client_usage.cur); | |
2518 | snd_iprintf(buffer, " peak clients : %d\n", client_usage.peak); | |
2519 | snd_iprintf(buffer, " max clients : %d\n", SNDRV_SEQ_MAX_CLIENTS); | |
2520 | snd_iprintf(buffer, "\n"); | |
2521 | ||
2522 | /* list the client table */ | |
2523 | for (c = 0; c < SNDRV_SEQ_MAX_CLIENTS; c++) { | |
2524 | client = snd_seq_client_use_ptr(c); | |
2525 | if (client == NULL) | |
2526 | continue; | |
2527 | if (client->type == NO_CLIENT) { | |
2528 | snd_seq_client_unlock(client); | |
2529 | continue; | |
2530 | } | |
2531 | ||
2532 | snd_iprintf(buffer, "Client %3d : \"%s\" [%s]\n", | |
2533 | c, client->name, | |
2534 | client->type == USER_CLIENT ? "User" : "Kernel"); | |
2535 | snd_seq_info_dump_ports(buffer, client); | |
2536 | if (snd_seq_write_pool_allocated(client)) { | |
2537 | snd_iprintf(buffer, " Output pool :\n"); | |
2538 | snd_seq_info_pool(buffer, client->pool, " "); | |
2539 | } | |
2540 | if (client->type == USER_CLIENT && client->data.user.fifo && | |
2541 | client->data.user.fifo->pool) { | |
2542 | snd_iprintf(buffer, " Input pool :\n"); | |
2543 | snd_seq_info_pool(buffer, client->data.user.fifo->pool, " "); | |
2544 | } | |
2545 | snd_seq_client_unlock(client); | |
2546 | } | |
2547 | } | |
04f141a8 | 2548 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
2549 | |
2550 | /*---------------------------------------------------------------------------*/ | |
2551 | ||
2552 | ||
2553 | /* | |
2554 | * REGISTRATION PART | |
2555 | */ | |
2556 | ||
9c2e08c5 | 2557 | static const struct file_operations snd_seq_f_ops = |
1da177e4 LT |
2558 | { |
2559 | .owner = THIS_MODULE, | |
2560 | .read = snd_seq_read, | |
2561 | .write = snd_seq_write, | |
2562 | .open = snd_seq_open, | |
2563 | .release = snd_seq_release, | |
02f4865f | 2564 | .llseek = no_llseek, |
1da177e4 LT |
2565 | .poll = snd_seq_poll, |
2566 | .unlocked_ioctl = snd_seq_ioctl, | |
2567 | .compat_ioctl = snd_seq_ioctl_compat, | |
2568 | }; | |
2569 | ||
1da177e4 LT |
2570 | /* |
2571 | * register sequencer device | |
2572 | */ | |
2573 | int __init snd_sequencer_device_init(void) | |
2574 | { | |
2575 | int err; | |
2576 | ||
1a60d4c5 | 2577 | if (mutex_lock_interruptible(®ister_mutex)) |
1da177e4 LT |
2578 | return -ERESTARTSYS; |
2579 | ||
2af677fc | 2580 | if ((err = snd_register_device(SNDRV_DEVICE_TYPE_SEQUENCER, NULL, 0, |
f87135f5 | 2581 | &snd_seq_f_ops, NULL, "seq")) < 0) { |
1a60d4c5 | 2582 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
2583 | return err; |
2584 | } | |
2585 | ||
1a60d4c5 | 2586 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
2587 | |
2588 | return 0; | |
2589 | } | |
2590 | ||
2591 | ||
2592 | ||
2593 | /* | |
2594 | * unregister sequencer device | |
2595 | */ | |
2596 | void __exit snd_sequencer_device_done(void) | |
2597 | { | |
2598 | snd_unregister_device(SNDRV_DEVICE_TYPE_SEQUENCER, NULL, 0); | |
2599 | } |