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