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> | |
c1017a4c | 4 | * Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
5 | * Takashi Iwai <tiwai@suse.de> |
6 | * | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | * | |
22 | */ | |
23 | ||
1da177e4 | 24 | #include <linux/init.h> |
d81a6d71 | 25 | #include <linux/export.h> |
1da177e4 LT |
26 | #include <linux/slab.h> |
27 | #include <sound/core.h> | |
28 | #include <sound/minors.h> | |
29 | #include <linux/kmod.h> | |
30 | ||
31 | #include <sound/seq_kernel.h> | |
32 | #include "seq_clientmgr.h" | |
33 | #include "seq_memory.h" | |
34 | #include "seq_queue.h" | |
35 | #include "seq_timer.h" | |
36 | #include "seq_info.h" | |
37 | #include "seq_system.h" | |
38 | #include <sound/seq_device.h> | |
39 | #ifdef CONFIG_COMPAT | |
40 | #include <linux/compat.h> | |
41 | #endif | |
42 | ||
43 | /* Client Manager | |
44 | ||
45 | * this module handles the connections of userland and kernel clients | |
46 | * | |
47 | */ | |
48 | ||
aa1e77e6 CL |
49 | /* |
50 | * There are four ranges of client numbers (last two shared): | |
51 | * 0..15: global clients | |
52 | * 16..127: statically allocated client numbers for cards 0..27 | |
53 | * 128..191: dynamically allocated client numbers for cards 28..31 | |
54 | * 128..191: dynamically allocated client numbers for applications | |
55 | */ | |
56 | ||
57 | /* number of kernel non-card clients */ | |
58 | #define SNDRV_SEQ_GLOBAL_CLIENTS 16 | |
59 | /* clients per cards, for static clients */ | |
60 | #define SNDRV_SEQ_CLIENTS_PER_CARD 4 | |
61 | /* dynamically allocated client numbers (both kernel drivers and user space) */ | |
62 | #define SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN 128 | |
d001544d | 63 | |
1da177e4 LT |
64 | #define SNDRV_SEQ_LFLG_INPUT 0x0001 |
65 | #define SNDRV_SEQ_LFLG_OUTPUT 0x0002 | |
66 | #define SNDRV_SEQ_LFLG_OPEN (SNDRV_SEQ_LFLG_INPUT|SNDRV_SEQ_LFLG_OUTPUT) | |
67 | ||
68 | static DEFINE_SPINLOCK(clients_lock); | |
1a60d4c5 | 69 | static DEFINE_MUTEX(register_mutex); |
1da177e4 LT |
70 | |
71 | /* | |
72 | * client table | |
73 | */ | |
74 | static char clienttablock[SNDRV_SEQ_MAX_CLIENTS]; | |
c7e0b5bf TI |
75 | static struct snd_seq_client *clienttab[SNDRV_SEQ_MAX_CLIENTS]; |
76 | static struct snd_seq_usage client_usage; | |
1da177e4 LT |
77 | |
78 | /* | |
79 | * prototypes | |
80 | */ | |
c7e0b5bf TI |
81 | static int bounce_error_event(struct snd_seq_client *client, |
82 | struct snd_seq_event *event, | |
83 | int err, int atomic, int hop); | |
84 | static int snd_seq_deliver_single_event(struct snd_seq_client *client, | |
85 | struct snd_seq_event *event, | |
86 | int filter, int atomic, int hop); | |
1da177e4 | 87 | |
1da177e4 LT |
88 | /* |
89 | */ | |
90 | static inline unsigned short snd_seq_file_flags(struct file *file) | |
91 | { | |
92 | switch (file->f_mode & (FMODE_READ | FMODE_WRITE)) { | |
93 | case FMODE_WRITE: | |
94 | return SNDRV_SEQ_LFLG_OUTPUT; | |
95 | case FMODE_READ: | |
96 | return SNDRV_SEQ_LFLG_INPUT; | |
97 | default: | |
98 | return SNDRV_SEQ_LFLG_OPEN; | |
99 | } | |
100 | } | |
101 | ||
c7e0b5bf | 102 | static inline int snd_seq_write_pool_allocated(struct snd_seq_client *client) |
1da177e4 LT |
103 | { |
104 | return snd_seq_total_cells(client->pool) > 0; | |
105 | } | |
106 | ||
107 | /* return pointer to client structure for specified id */ | |
c7e0b5bf | 108 | static struct snd_seq_client *clientptr(int clientid) |
1da177e4 LT |
109 | { |
110 | if (clientid < 0 || clientid >= SNDRV_SEQ_MAX_CLIENTS) { | |
04cc79a0 | 111 | pr_debug("ALSA: seq: oops. Trying to get pointer to client %d\n", |
c7e0b5bf | 112 | clientid); |
1da177e4 LT |
113 | return NULL; |
114 | } | |
115 | return clienttab[clientid]; | |
116 | } | |
117 | ||
c7e0b5bf | 118 | struct snd_seq_client *snd_seq_client_use_ptr(int clientid) |
1da177e4 LT |
119 | { |
120 | unsigned long flags; | |
c7e0b5bf | 121 | struct snd_seq_client *client; |
1da177e4 LT |
122 | |
123 | if (clientid < 0 || clientid >= SNDRV_SEQ_MAX_CLIENTS) { | |
04cc79a0 | 124 | pr_debug("ALSA: seq: oops. Trying to get pointer to client %d\n", |
c7e0b5bf | 125 | clientid); |
1da177e4 LT |
126 | return NULL; |
127 | } | |
128 | spin_lock_irqsave(&clients_lock, flags); | |
129 | client = clientptr(clientid); | |
130 | if (client) | |
131 | goto __lock; | |
132 | if (clienttablock[clientid]) { | |
133 | spin_unlock_irqrestore(&clients_lock, flags); | |
134 | return NULL; | |
135 | } | |
136 | spin_unlock_irqrestore(&clients_lock, flags); | |
ee2da997 | 137 | #ifdef CONFIG_MODULES |
0d63e4f9 | 138 | if (!in_interrupt()) { |
aa1e77e6 | 139 | static char client_requested[SNDRV_SEQ_GLOBAL_CLIENTS]; |
1da177e4 | 140 | static char card_requested[SNDRV_CARDS]; |
aa1e77e6 | 141 | if (clientid < SNDRV_SEQ_GLOBAL_CLIENTS) { |
1da177e4 LT |
142 | int idx; |
143 | ||
0d63e4f9 | 144 | if (!client_requested[clientid]) { |
1da177e4 | 145 | client_requested[clientid] = 1; |
aa1e77e6 | 146 | for (idx = 0; idx < 15; idx++) { |
1da177e4 LT |
147 | if (seq_client_load[idx] < 0) |
148 | break; | |
149 | if (seq_client_load[idx] == clientid) { | |
c7e0b5bf TI |
150 | request_module("snd-seq-client-%i", |
151 | clientid); | |
1da177e4 LT |
152 | break; |
153 | } | |
154 | } | |
155 | } | |
aa1e77e6 CL |
156 | } else if (clientid < SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN) { |
157 | int card = (clientid - SNDRV_SEQ_GLOBAL_CLIENTS) / | |
158 | SNDRV_SEQ_CLIENTS_PER_CARD; | |
1da177e4 LT |
159 | if (card < snd_ecards_limit) { |
160 | if (! card_requested[card]) { | |
161 | card_requested[card] = 1; | |
162 | snd_request_card(card); | |
163 | } | |
164 | snd_seq_device_load_drivers(); | |
165 | } | |
166 | } | |
167 | spin_lock_irqsave(&clients_lock, flags); | |
168 | client = clientptr(clientid); | |
169 | if (client) | |
170 | goto __lock; | |
171 | spin_unlock_irqrestore(&clients_lock, flags); | |
172 | } | |
173 | #endif | |
174 | return NULL; | |
175 | ||
176 | __lock: | |
177 | snd_use_lock_use(&client->use_lock); | |
178 | spin_unlock_irqrestore(&clients_lock, flags); | |
179 | return client; | |
180 | } | |
181 | ||
c7e0b5bf | 182 | static void usage_alloc(struct snd_seq_usage *res, int num) |
1da177e4 LT |
183 | { |
184 | res->cur += num; | |
185 | if (res->cur > res->peak) | |
186 | res->peak = res->cur; | |
187 | } | |
188 | ||
c7e0b5bf | 189 | static void usage_free(struct snd_seq_usage *res, int num) |
1da177e4 LT |
190 | { |
191 | res->cur -= num; | |
192 | } | |
193 | ||
194 | /* initialise data structures */ | |
195 | int __init client_init_data(void) | |
196 | { | |
197 | /* zap out the client table */ | |
198 | memset(&clienttablock, 0, sizeof(clienttablock)); | |
199 | memset(&clienttab, 0, sizeof(clienttab)); | |
200 | return 0; | |
201 | } | |
202 | ||
203 | ||
aa1e77e6 | 204 | static struct snd_seq_client *seq_create_client1(int client_index, int poolsize) |
1da177e4 LT |
205 | { |
206 | unsigned long flags; | |
207 | int c; | |
c7e0b5bf | 208 | struct snd_seq_client *client; |
1da177e4 LT |
209 | |
210 | /* init client data */ | |
ecca82b4 | 211 | client = kzalloc(sizeof(*client), GFP_KERNEL); |
1da177e4 LT |
212 | if (client == NULL) |
213 | return NULL; | |
214 | client->pool = snd_seq_pool_new(poolsize); | |
215 | if (client->pool == NULL) { | |
216 | kfree(client); | |
217 | return NULL; | |
218 | } | |
219 | client->type = NO_CLIENT; | |
220 | snd_use_lock_init(&client->use_lock); | |
221 | rwlock_init(&client->ports_lock); | |
1a60d4c5 | 222 | mutex_init(&client->ports_mutex); |
1da177e4 | 223 | INIT_LIST_HEAD(&client->ports_list_head); |
b3defb79 | 224 | mutex_init(&client->ioctl_mutex); |
1da177e4 LT |
225 | |
226 | /* find free slot in the client table */ | |
227 | spin_lock_irqsave(&clients_lock, flags); | |
228 | if (client_index < 0) { | |
aa1e77e6 CL |
229 | for (c = SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN; |
230 | c < SNDRV_SEQ_MAX_CLIENTS; | |
231 | c++) { | |
1da177e4 LT |
232 | if (clienttab[c] || clienttablock[c]) |
233 | continue; | |
234 | clienttab[client->number = c] = client; | |
235 | spin_unlock_irqrestore(&clients_lock, flags); | |
236 | return client; | |
237 | } | |
238 | } else { | |
239 | if (clienttab[client_index] == NULL && !clienttablock[client_index]) { | |
240 | clienttab[client->number = client_index] = client; | |
241 | spin_unlock_irqrestore(&clients_lock, flags); | |
242 | return client; | |
243 | } | |
244 | } | |
245 | spin_unlock_irqrestore(&clients_lock, flags); | |
246 | snd_seq_pool_delete(&client->pool); | |
247 | kfree(client); | |
248 | return NULL; /* no free slot found or busy, return failure code */ | |
249 | } | |
250 | ||
251 | ||
c7e0b5bf | 252 | static int seq_free_client1(struct snd_seq_client *client) |
1da177e4 LT |
253 | { |
254 | unsigned long flags; | |
255 | ||
7eaa943c TI |
256 | if (!client) |
257 | return 0; | |
1da177e4 LT |
258 | snd_seq_delete_all_ports(client); |
259 | snd_seq_queue_client_leave(client->number); | |
260 | spin_lock_irqsave(&clients_lock, flags); | |
261 | clienttablock[client->number] = 1; | |
262 | clienttab[client->number] = NULL; | |
263 | spin_unlock_irqrestore(&clients_lock, flags); | |
264 | snd_use_lock_sync(&client->use_lock); | |
265 | snd_seq_queue_client_termination(client->number); | |
266 | if (client->pool) | |
267 | snd_seq_pool_delete(&client->pool); | |
268 | spin_lock_irqsave(&clients_lock, flags); | |
269 | clienttablock[client->number] = 0; | |
270 | spin_unlock_irqrestore(&clients_lock, flags); | |
271 | return 0; | |
272 | } | |
273 | ||
274 | ||
c7e0b5bf | 275 | static void seq_free_client(struct snd_seq_client * client) |
1da177e4 | 276 | { |
1a60d4c5 | 277 | mutex_lock(®ister_mutex); |
1da177e4 LT |
278 | switch (client->type) { |
279 | case NO_CLIENT: | |
04cc79a0 TI |
280 | pr_warn("ALSA: seq: Trying to free unused client %d\n", |
281 | client->number); | |
1da177e4 LT |
282 | break; |
283 | case USER_CLIENT: | |
284 | case KERNEL_CLIENT: | |
285 | seq_free_client1(client); | |
286 | usage_free(&client_usage, 1); | |
287 | break; | |
288 | ||
289 | default: | |
04cc79a0 | 290 | pr_err("ALSA: seq: Trying to free client %d with undefined type = %d\n", |
c7e0b5bf | 291 | client->number, client->type); |
1da177e4 | 292 | } |
1a60d4c5 | 293 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
294 | |
295 | snd_seq_system_client_ev_client_exit(client->number); | |
296 | } | |
297 | ||
298 | ||
299 | ||
300 | /* -------------------------------------------------------- */ | |
301 | ||
302 | /* create a user client */ | |
303 | static int snd_seq_open(struct inode *inode, struct file *file) | |
304 | { | |
305 | int c, mode; /* client id */ | |
c7e0b5bf TI |
306 | struct snd_seq_client *client; |
307 | struct snd_seq_user_client *user; | |
02f4865f TI |
308 | int err; |
309 | ||
310 | err = nonseekable_open(inode, file); | |
311 | if (err < 0) | |
312 | return err; | |
1da177e4 | 313 | |
1a60d4c5 | 314 | if (mutex_lock_interruptible(®ister_mutex)) |
1da177e4 | 315 | return -ERESTARTSYS; |
aa1e77e6 | 316 | client = seq_create_client1(-1, SNDRV_SEQ_DEFAULT_EVENTS); |
1da177e4 | 317 | if (client == NULL) { |
1a60d4c5 | 318 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
319 | return -ENOMEM; /* failure code */ |
320 | } | |
321 | ||
322 | mode = snd_seq_file_flags(file); | |
323 | if (mode & SNDRV_SEQ_LFLG_INPUT) | |
324 | client->accept_input = 1; | |
325 | if (mode & SNDRV_SEQ_LFLG_OUTPUT) | |
326 | client->accept_output = 1; | |
327 | ||
328 | user = &client->data.user; | |
329 | user->fifo = NULL; | |
330 | user->fifo_pool_size = 0; | |
331 | ||
332 | if (mode & SNDRV_SEQ_LFLG_INPUT) { | |
333 | user->fifo_pool_size = SNDRV_SEQ_DEFAULT_CLIENT_EVENTS; | |
334 | user->fifo = snd_seq_fifo_new(user->fifo_pool_size); | |
335 | if (user->fifo == NULL) { | |
336 | seq_free_client1(client); | |
337 | kfree(client); | |
1a60d4c5 | 338 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
339 | return -ENOMEM; |
340 | } | |
341 | } | |
342 | ||
343 | usage_alloc(&client_usage, 1); | |
344 | client->type = USER_CLIENT; | |
1a60d4c5 | 345 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
346 | |
347 | c = client->number; | |
348 | file->private_data = client; | |
349 | ||
350 | /* fill client data */ | |
351 | user->file = file; | |
352 | sprintf(client->name, "Client-%d", c); | |
a1ce94d0 | 353 | client->data.user.owner = get_pid(task_pid(current)); |
1da177e4 LT |
354 | |
355 | /* make others aware this new client */ | |
356 | snd_seq_system_client_ev_client_start(c); | |
357 | ||
358 | return 0; | |
359 | } | |
360 | ||
361 | /* delete a user client */ | |
362 | static int snd_seq_release(struct inode *inode, struct file *file) | |
363 | { | |
c7e0b5bf | 364 | struct snd_seq_client *client = file->private_data; |
1da177e4 LT |
365 | |
366 | if (client) { | |
367 | seq_free_client(client); | |
368 | if (client->data.user.fifo) | |
369 | snd_seq_fifo_delete(&client->data.user.fifo); | |
a1ce94d0 | 370 | put_pid(client->data.user.owner); |
1da177e4 LT |
371 | kfree(client); |
372 | } | |
373 | ||
374 | return 0; | |
375 | } | |
376 | ||
377 | ||
378 | /* handle client read() */ | |
379 | /* possible error values: | |
380 | * -ENXIO invalid client or file open mode | |
381 | * -ENOSPC FIFO overflow (the flag is cleared after this error report) | |
382 | * -EINVAL no enough user-space buffer to write the whole event | |
383 | * -EFAULT seg. fault during copy to user space | |
384 | */ | |
c7e0b5bf TI |
385 | static ssize_t snd_seq_read(struct file *file, char __user *buf, size_t count, |
386 | loff_t *offset) | |
1da177e4 | 387 | { |
c7e0b5bf TI |
388 | struct snd_seq_client *client = file->private_data; |
389 | struct snd_seq_fifo *fifo; | |
1da177e4 LT |
390 | int err; |
391 | long result = 0; | |
c7e0b5bf | 392 | struct snd_seq_event_cell *cell; |
1da177e4 LT |
393 | |
394 | if (!(snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_INPUT)) | |
395 | return -ENXIO; | |
396 | ||
397 | if (!access_ok(VERIFY_WRITE, buf, count)) | |
398 | return -EFAULT; | |
399 | ||
400 | /* check client structures are in place */ | |
7eaa943c TI |
401 | if (snd_BUG_ON(!client)) |
402 | return -ENXIO; | |
1da177e4 LT |
403 | |
404 | if (!client->accept_input || (fifo = client->data.user.fifo) == NULL) | |
405 | return -ENXIO; | |
406 | ||
407 | if (atomic_read(&fifo->overflow) > 0) { | |
408 | /* buffer overflow is detected */ | |
409 | snd_seq_fifo_clear(fifo); | |
410 | /* return error code */ | |
411 | return -ENOSPC; | |
412 | } | |
413 | ||
414 | cell = NULL; | |
415 | err = 0; | |
416 | snd_seq_fifo_lock(fifo); | |
417 | ||
418 | /* while data available in queue */ | |
c7e0b5bf | 419 | while (count >= sizeof(struct snd_seq_event)) { |
1da177e4 LT |
420 | int nonblock; |
421 | ||
422 | nonblock = (file->f_flags & O_NONBLOCK) || result > 0; | |
423 | if ((err = snd_seq_fifo_cell_out(fifo, &cell, nonblock)) < 0) { | |
424 | break; | |
425 | } | |
426 | if (snd_seq_ev_is_variable(&cell->event)) { | |
c7e0b5bf | 427 | struct snd_seq_event tmpev; |
1da177e4 LT |
428 | tmpev = cell->event; |
429 | tmpev.data.ext.len &= ~SNDRV_SEQ_EXT_MASK; | |
c7e0b5bf | 430 | if (copy_to_user(buf, &tmpev, sizeof(struct snd_seq_event))) { |
1da177e4 LT |
431 | err = -EFAULT; |
432 | break; | |
433 | } | |
c7e0b5bf TI |
434 | count -= sizeof(struct snd_seq_event); |
435 | buf += sizeof(struct snd_seq_event); | |
4d23359b CL |
436 | err = snd_seq_expand_var_event(&cell->event, count, |
437 | (char __force *)buf, 0, | |
c7e0b5bf | 438 | sizeof(struct snd_seq_event)); |
1da177e4 LT |
439 | if (err < 0) |
440 | break; | |
441 | result += err; | |
442 | count -= err; | |
443 | buf += err; | |
444 | } else { | |
c7e0b5bf | 445 | if (copy_to_user(buf, &cell->event, sizeof(struct snd_seq_event))) { |
1da177e4 LT |
446 | err = -EFAULT; |
447 | break; | |
448 | } | |
c7e0b5bf TI |
449 | count -= sizeof(struct snd_seq_event); |
450 | buf += sizeof(struct snd_seq_event); | |
1da177e4 LT |
451 | } |
452 | snd_seq_cell_free(cell); | |
453 | cell = NULL; /* to be sure */ | |
c7e0b5bf | 454 | result += sizeof(struct snd_seq_event); |
1da177e4 LT |
455 | } |
456 | ||
457 | if (err < 0) { | |
458 | if (cell) | |
459 | snd_seq_fifo_cell_putback(fifo, cell); | |
460 | if (err == -EAGAIN && result > 0) | |
461 | err = 0; | |
462 | } | |
463 | snd_seq_fifo_unlock(fifo); | |
464 | ||
465 | return (err < 0) ? err : result; | |
466 | } | |
467 | ||
468 | ||
469 | /* | |
470 | * check access permission to the port | |
471 | */ | |
c7e0b5bf | 472 | static int check_port_perm(struct snd_seq_client_port *port, unsigned int flags) |
1da177e4 LT |
473 | { |
474 | if ((port->capability & flags) != flags) | |
475 | return 0; | |
476 | return flags; | |
477 | } | |
478 | ||
479 | /* | |
480 | * check if the destination client is available, and return the pointer | |
481 | * if filter is non-zero, client filter bitmap is tested. | |
482 | */ | |
c7e0b5bf TI |
483 | static struct snd_seq_client *get_event_dest_client(struct snd_seq_event *event, |
484 | int filter) | |
1da177e4 | 485 | { |
c7e0b5bf | 486 | struct snd_seq_client *dest; |
1da177e4 LT |
487 | |
488 | dest = snd_seq_client_use_ptr(event->dest.client); | |
489 | if (dest == NULL) | |
490 | return NULL; | |
491 | if (! dest->accept_input) | |
492 | goto __not_avail; | |
493 | if ((dest->filter & SNDRV_SEQ_FILTER_USE_EVENT) && | |
494 | ! test_bit(event->type, dest->event_filter)) | |
495 | goto __not_avail; | |
496 | if (filter && !(dest->filter & filter)) | |
497 | goto __not_avail; | |
498 | ||
499 | return dest; /* ok - accessible */ | |
500 | __not_avail: | |
501 | snd_seq_client_unlock(dest); | |
502 | return NULL; | |
503 | } | |
504 | ||
505 | ||
506 | /* | |
507 | * Return the error event. | |
508 | * | |
509 | * If the receiver client is a user client, the original event is | |
510 | * encapsulated in SNDRV_SEQ_EVENT_BOUNCE as variable length event. If | |
511 | * the original event is also variable length, the external data is | |
512 | * copied after the event record. | |
513 | * If the receiver client is a kernel client, the original event is | |
514 | * quoted in SNDRV_SEQ_EVENT_KERNEL_ERROR, since this requires no extra | |
515 | * kmalloc. | |
516 | */ | |
c7e0b5bf TI |
517 | static int bounce_error_event(struct snd_seq_client *client, |
518 | struct snd_seq_event *event, | |
1da177e4 LT |
519 | int err, int atomic, int hop) |
520 | { | |
c7e0b5bf | 521 | struct snd_seq_event bounce_ev; |
1da177e4 LT |
522 | int result; |
523 | ||
524 | if (client == NULL || | |
525 | ! (client->filter & SNDRV_SEQ_FILTER_BOUNCE) || | |
526 | ! client->accept_input) | |
527 | return 0; /* ignored */ | |
528 | ||
529 | /* set up quoted error */ | |
530 | memset(&bounce_ev, 0, sizeof(bounce_ev)); | |
531 | bounce_ev.type = SNDRV_SEQ_EVENT_KERNEL_ERROR; | |
532 | bounce_ev.flags = SNDRV_SEQ_EVENT_LENGTH_FIXED; | |
533 | bounce_ev.queue = SNDRV_SEQ_QUEUE_DIRECT; | |
534 | bounce_ev.source.client = SNDRV_SEQ_CLIENT_SYSTEM; | |
535 | bounce_ev.source.port = SNDRV_SEQ_PORT_SYSTEM_ANNOUNCE; | |
536 | bounce_ev.dest.client = client->number; | |
537 | bounce_ev.dest.port = event->source.port; | |
538 | bounce_ev.data.quote.origin = event->dest; | |
539 | bounce_ev.data.quote.event = event; | |
540 | bounce_ev.data.quote.value = -err; /* use positive value */ | |
541 | result = snd_seq_deliver_single_event(NULL, &bounce_ev, 0, atomic, hop + 1); | |
542 | if (result < 0) { | |
543 | client->event_lost++; | |
544 | return result; | |
545 | } | |
546 | ||
547 | return result; | |
548 | } | |
549 | ||
550 | ||
551 | /* | |
552 | * rewrite the time-stamp of the event record with the curren time | |
553 | * of the given queue. | |
554 | * return non-zero if updated. | |
555 | */ | |
c7e0b5bf TI |
556 | static int update_timestamp_of_queue(struct snd_seq_event *event, |
557 | int queue, int real_time) | |
1da177e4 | 558 | { |
c7e0b5bf | 559 | struct snd_seq_queue *q; |
1da177e4 LT |
560 | |
561 | q = queueptr(queue); | |
562 | if (! q) | |
563 | return 0; | |
564 | event->queue = queue; | |
565 | event->flags &= ~SNDRV_SEQ_TIME_STAMP_MASK; | |
566 | if (real_time) { | |
567 | event->time.time = snd_seq_timer_get_cur_time(q->timer); | |
568 | event->flags |= SNDRV_SEQ_TIME_STAMP_REAL; | |
569 | } else { | |
570 | event->time.tick = snd_seq_timer_get_cur_tick(q->timer); | |
571 | event->flags |= SNDRV_SEQ_TIME_STAMP_TICK; | |
572 | } | |
573 | queuefree(q); | |
574 | return 1; | |
575 | } | |
576 | ||
577 | ||
578 | /* | |
579 | * deliver an event to the specified destination. | |
580 | * if filter is non-zero, client filter bitmap is tested. | |
581 | * | |
582 | * RETURN VALUE: 0 : if succeeded | |
583 | * <0 : error | |
584 | */ | |
c7e0b5bf TI |
585 | static int snd_seq_deliver_single_event(struct snd_seq_client *client, |
586 | struct snd_seq_event *event, | |
1da177e4 LT |
587 | int filter, int atomic, int hop) |
588 | { | |
c7e0b5bf TI |
589 | struct snd_seq_client *dest = NULL; |
590 | struct snd_seq_client_port *dest_port = NULL; | |
1da177e4 LT |
591 | int result = -ENOENT; |
592 | int direct; | |
593 | ||
594 | direct = snd_seq_ev_is_direct(event); | |
595 | ||
596 | dest = get_event_dest_client(event, filter); | |
597 | if (dest == NULL) | |
598 | goto __skip; | |
599 | dest_port = snd_seq_port_use_ptr(dest, event->dest.port); | |
600 | if (dest_port == NULL) | |
601 | goto __skip; | |
602 | ||
603 | /* check permission */ | |
604 | if (! check_port_perm(dest_port, SNDRV_SEQ_PORT_CAP_WRITE)) { | |
605 | result = -EPERM; | |
606 | goto __skip; | |
607 | } | |
608 | ||
609 | if (dest_port->timestamping) | |
610 | update_timestamp_of_queue(event, dest_port->time_queue, | |
611 | dest_port->time_real); | |
612 | ||
613 | switch (dest->type) { | |
614 | case USER_CLIENT: | |
615 | if (dest->data.user.fifo) | |
616 | result = snd_seq_fifo_event_in(dest->data.user.fifo, event); | |
617 | break; | |
618 | ||
619 | case KERNEL_CLIENT: | |
620 | if (dest_port->event_input == NULL) | |
621 | break; | |
c7e0b5bf TI |
622 | result = dest_port->event_input(event, direct, |
623 | dest_port->private_data, | |
624 | atomic, hop); | |
1da177e4 LT |
625 | break; |
626 | default: | |
627 | break; | |
628 | } | |
629 | ||
630 | __skip: | |
631 | if (dest_port) | |
632 | snd_seq_port_unlock(dest_port); | |
633 | if (dest) | |
634 | snd_seq_client_unlock(dest); | |
635 | ||
636 | if (result < 0 && !direct) { | |
637 | result = bounce_error_event(client, event, result, atomic, hop); | |
638 | } | |
639 | return result; | |
640 | } | |
641 | ||
642 | ||
643 | /* | |
644 | * send the event to all subscribers: | |
645 | */ | |
c7e0b5bf TI |
646 | static int deliver_to_subscribers(struct snd_seq_client *client, |
647 | struct snd_seq_event *event, | |
1da177e4 LT |
648 | int atomic, int hop) |
649 | { | |
c7e0b5bf | 650 | struct snd_seq_subscribers *subs; |
27423257 | 651 | int err, result = 0, num_ev = 0; |
c7e0b5bf TI |
652 | struct snd_seq_event event_saved; |
653 | struct snd_seq_client_port *src_port; | |
c7e0b5bf | 654 | struct snd_seq_port_subs_info *grp; |
1da177e4 LT |
655 | |
656 | src_port = snd_seq_port_use_ptr(client, event->source.port); | |
657 | if (src_port == NULL) | |
658 | return -EINVAL; /* invalid source port */ | |
659 | /* save original event record */ | |
660 | event_saved = *event; | |
661 | grp = &src_port->c_src; | |
662 | ||
663 | /* lock list */ | |
664 | if (atomic) | |
665 | read_lock(&grp->list_lock); | |
666 | else | |
1f20f9ff | 667 | down_read_nested(&grp->list_mutex, hop); |
9244b2c3 | 668 | list_for_each_entry(subs, &grp->list_head, src_list) { |
7f0973e9 TI |
669 | /* both ports ready? */ |
670 | if (atomic_read(&subs->ref_count) != 2) | |
671 | continue; | |
1da177e4 LT |
672 | event->dest = subs->info.dest; |
673 | if (subs->info.flags & SNDRV_SEQ_PORT_SUBS_TIMESTAMP) | |
674 | /* convert time according to flag with subscription */ | |
675 | update_timestamp_of_queue(event, subs->info.queue, | |
676 | subs->info.flags & SNDRV_SEQ_PORT_SUBS_TIME_REAL); | |
677 | err = snd_seq_deliver_single_event(client, event, | |
678 | 0, atomic, hop); | |
27423257 AG |
679 | if (err < 0) { |
680 | /* save first error that occurs and continue */ | |
681 | if (!result) | |
682 | result = err; | |
683 | continue; | |
684 | } | |
1da177e4 LT |
685 | num_ev++; |
686 | /* restore original event record */ | |
687 | *event = event_saved; | |
688 | } | |
689 | if (atomic) | |
690 | read_unlock(&grp->list_lock); | |
691 | else | |
692 | up_read(&grp->list_mutex); | |
693 | *event = event_saved; /* restore */ | |
694 | snd_seq_port_unlock(src_port); | |
27423257 | 695 | return (result < 0) ? result : num_ev; |
1da177e4 LT |
696 | } |
697 | ||
698 | ||
699 | #ifdef SUPPORT_BROADCAST | |
700 | /* | |
701 | * broadcast to all ports: | |
702 | */ | |
c7e0b5bf TI |
703 | static int port_broadcast_event(struct snd_seq_client *client, |
704 | struct snd_seq_event *event, | |
1da177e4 LT |
705 | int atomic, int hop) |
706 | { | |
27423257 | 707 | int num_ev = 0, err, result = 0; |
c7e0b5bf | 708 | struct snd_seq_client *dest_client; |
9244b2c3 | 709 | struct snd_seq_client_port *port; |
1da177e4 LT |
710 | |
711 | dest_client = get_event_dest_client(event, SNDRV_SEQ_FILTER_BROADCAST); | |
712 | if (dest_client == NULL) | |
713 | return 0; /* no matching destination */ | |
714 | ||
715 | read_lock(&dest_client->ports_lock); | |
9244b2c3 | 716 | list_for_each_entry(port, &dest_client->ports_list_head, list) { |
1da177e4 LT |
717 | event->dest.port = port->addr.port; |
718 | /* pass NULL as source client to avoid error bounce */ | |
719 | err = snd_seq_deliver_single_event(NULL, event, | |
720 | SNDRV_SEQ_FILTER_BROADCAST, | |
721 | atomic, hop); | |
27423257 AG |
722 | if (err < 0) { |
723 | /* save first error that occurs and continue */ | |
724 | if (!result) | |
725 | result = err; | |
726 | continue; | |
727 | } | |
1da177e4 LT |
728 | num_ev++; |
729 | } | |
730 | read_unlock(&dest_client->ports_lock); | |
731 | snd_seq_client_unlock(dest_client); | |
732 | event->dest.port = SNDRV_SEQ_ADDRESS_BROADCAST; /* restore */ | |
27423257 | 733 | return (result < 0) ? result : num_ev; |
1da177e4 LT |
734 | } |
735 | ||
736 | /* | |
737 | * send the event to all clients: | |
738 | * if destination port is also ADDRESS_BROADCAST, deliver to all ports. | |
739 | */ | |
c7e0b5bf TI |
740 | static int broadcast_event(struct snd_seq_client *client, |
741 | struct snd_seq_event *event, int atomic, int hop) | |
1da177e4 | 742 | { |
27423257 | 743 | int err, result = 0, num_ev = 0; |
1da177e4 | 744 | int dest; |
c7e0b5bf | 745 | struct snd_seq_addr addr; |
1da177e4 LT |
746 | |
747 | addr = event->dest; /* save */ | |
748 | ||
749 | for (dest = 0; dest < SNDRV_SEQ_MAX_CLIENTS; dest++) { | |
750 | /* don't send to itself */ | |
751 | if (dest == client->number) | |
752 | continue; | |
753 | event->dest.client = dest; | |
754 | event->dest.port = addr.port; | |
755 | if (addr.port == SNDRV_SEQ_ADDRESS_BROADCAST) | |
756 | err = port_broadcast_event(client, event, atomic, hop); | |
757 | else | |
758 | /* pass NULL as source client to avoid error bounce */ | |
759 | err = snd_seq_deliver_single_event(NULL, event, | |
760 | SNDRV_SEQ_FILTER_BROADCAST, | |
761 | atomic, hop); | |
27423257 AG |
762 | if (err < 0) { |
763 | /* save first error that occurs and continue */ | |
764 | if (!result) | |
765 | result = err; | |
766 | continue; | |
767 | } | |
1da177e4 LT |
768 | num_ev += err; |
769 | } | |
770 | event->dest = addr; /* restore */ | |
27423257 | 771 | return (result < 0) ? result : num_ev; |
1da177e4 LT |
772 | } |
773 | ||
774 | ||
775 | /* multicast - not supported yet */ | |
c7e0b5bf | 776 | static int multicast_event(struct snd_seq_client *client, struct snd_seq_event *event, |
1da177e4 LT |
777 | int atomic, int hop) |
778 | { | |
04cc79a0 | 779 | pr_debug("ALSA: seq: multicast not supported yet.\n"); |
1da177e4 LT |
780 | return 0; /* ignored */ |
781 | } | |
782 | #endif /* SUPPORT_BROADCAST */ | |
783 | ||
784 | ||
785 | /* deliver an event to the destination port(s). | |
786 | * if the event is to subscribers or broadcast, the event is dispatched | |
787 | * to multiple targets. | |
788 | * | |
789 | * RETURN VALUE: n > 0 : the number of delivered events. | |
790 | * n == 0 : the event was not passed to any client. | |
791 | * n < 0 : error - event was not processed. | |
792 | */ | |
c7e0b5bf | 793 | static int snd_seq_deliver_event(struct snd_seq_client *client, struct snd_seq_event *event, |
1da177e4 LT |
794 | int atomic, int hop) |
795 | { | |
796 | int result; | |
797 | ||
798 | hop++; | |
799 | if (hop >= SNDRV_SEQ_MAX_HOPS) { | |
04cc79a0 | 800 | pr_debug("ALSA: seq: too long delivery path (%d:%d->%d:%d)\n", |
1da177e4 LT |
801 | event->source.client, event->source.port, |
802 | event->dest.client, event->dest.port); | |
803 | return -EMLINK; | |
804 | } | |
805 | ||
19b592da TI |
806 | if (snd_seq_ev_is_variable(event) && |
807 | snd_BUG_ON(atomic && (event->data.ext.len & SNDRV_SEQ_EXT_USRPTR))) | |
808 | return -EINVAL; | |
809 | ||
1da177e4 LT |
810 | if (event->queue == SNDRV_SEQ_ADDRESS_SUBSCRIBERS || |
811 | event->dest.client == SNDRV_SEQ_ADDRESS_SUBSCRIBERS) | |
812 | result = deliver_to_subscribers(client, event, atomic, hop); | |
813 | #ifdef SUPPORT_BROADCAST | |
814 | else if (event->queue == SNDRV_SEQ_ADDRESS_BROADCAST || | |
815 | event->dest.client == SNDRV_SEQ_ADDRESS_BROADCAST) | |
816 | result = broadcast_event(client, event, atomic, hop); | |
817 | else if (event->dest.client >= SNDRV_SEQ_MAX_CLIENTS) | |
818 | result = multicast_event(client, event, atomic, hop); | |
819 | else if (event->dest.port == SNDRV_SEQ_ADDRESS_BROADCAST) | |
820 | result = port_broadcast_event(client, event, atomic, hop); | |
821 | #endif | |
822 | else | |
823 | result = snd_seq_deliver_single_event(client, event, 0, atomic, hop); | |
824 | ||
825 | return result; | |
826 | } | |
827 | ||
828 | /* | |
829 | * dispatch an event cell: | |
830 | * This function is called only from queue check routines in timer | |
831 | * interrupts or after enqueued. | |
832 | * The event cell shall be released or re-queued in this function. | |
833 | * | |
834 | * RETURN VALUE: n > 0 : the number of delivered events. | |
835 | * n == 0 : the event was not passed to any client. | |
836 | * n < 0 : error - event was not processed. | |
837 | */ | |
c7e0b5bf | 838 | int snd_seq_dispatch_event(struct snd_seq_event_cell *cell, int atomic, int hop) |
1da177e4 | 839 | { |
c7e0b5bf | 840 | struct snd_seq_client *client; |
1da177e4 LT |
841 | int result; |
842 | ||
7eaa943c TI |
843 | if (snd_BUG_ON(!cell)) |
844 | return -EINVAL; | |
1da177e4 LT |
845 | |
846 | client = snd_seq_client_use_ptr(cell->event.source.client); | |
847 | if (client == NULL) { | |
848 | snd_seq_cell_free(cell); /* release this cell */ | |
849 | return -EINVAL; | |
850 | } | |
851 | ||
852 | if (cell->event.type == SNDRV_SEQ_EVENT_NOTE) { | |
853 | /* NOTE event: | |
854 | * the event cell is re-used as a NOTE-OFF event and | |
855 | * enqueued again. | |
856 | */ | |
c7e0b5bf | 857 | struct snd_seq_event tmpev, *ev; |
1da177e4 LT |
858 | |
859 | /* reserve this event to enqueue note-off later */ | |
860 | tmpev = cell->event; | |
861 | tmpev.type = SNDRV_SEQ_EVENT_NOTEON; | |
862 | result = snd_seq_deliver_event(client, &tmpev, atomic, hop); | |
863 | ||
864 | /* | |
865 | * This was originally a note event. We now re-use the | |
866 | * cell for the note-off event. | |
867 | */ | |
868 | ||
869 | ev = &cell->event; | |
870 | ev->type = SNDRV_SEQ_EVENT_NOTEOFF; | |
871 | ev->flags |= SNDRV_SEQ_PRIORITY_HIGH; | |
872 | ||
873 | /* add the duration time */ | |
874 | switch (ev->flags & SNDRV_SEQ_TIME_STAMP_MASK) { | |
875 | case SNDRV_SEQ_TIME_STAMP_TICK: | |
876 | ev->time.tick += ev->data.note.duration; | |
877 | break; | |
878 | case SNDRV_SEQ_TIME_STAMP_REAL: | |
879 | /* unit for duration is ms */ | |
880 | ev->time.time.tv_nsec += 1000000 * (ev->data.note.duration % 1000); | |
881 | ev->time.time.tv_sec += ev->data.note.duration / 1000 + | |
882 | ev->time.time.tv_nsec / 1000000000; | |
883 | ev->time.time.tv_nsec %= 1000000000; | |
884 | break; | |
885 | } | |
886 | ev->data.note.velocity = ev->data.note.off_velocity; | |
887 | ||
888 | /* Now queue this cell as the note off event */ | |
889 | if (snd_seq_enqueue_event(cell, atomic, hop) < 0) | |
890 | snd_seq_cell_free(cell); /* release this cell */ | |
891 | ||
892 | } else { | |
893 | /* Normal events: | |
894 | * event cell is freed after processing the event | |
895 | */ | |
896 | ||
897 | result = snd_seq_deliver_event(client, &cell->event, atomic, hop); | |
898 | snd_seq_cell_free(cell); | |
899 | } | |
900 | ||
901 | snd_seq_client_unlock(client); | |
902 | return result; | |
903 | } | |
904 | ||
905 | ||
906 | /* Allocate a cell from client pool and enqueue it to queue: | |
907 | * if pool is empty and blocking is TRUE, sleep until a new cell is | |
908 | * available. | |
909 | */ | |
c7e0b5bf TI |
910 | static int snd_seq_client_enqueue_event(struct snd_seq_client *client, |
911 | struct snd_seq_event *event, | |
1da177e4 LT |
912 | struct file *file, int blocking, |
913 | int atomic, int hop) | |
914 | { | |
c7e0b5bf | 915 | struct snd_seq_event_cell *cell; |
1da177e4 LT |
916 | int err; |
917 | ||
918 | /* special queue values - force direct passing */ | |
919 | if (event->queue == SNDRV_SEQ_ADDRESS_SUBSCRIBERS) { | |
920 | event->dest.client = SNDRV_SEQ_ADDRESS_SUBSCRIBERS; | |
921 | event->queue = SNDRV_SEQ_QUEUE_DIRECT; | |
922 | } else | |
923 | #ifdef SUPPORT_BROADCAST | |
924 | if (event->queue == SNDRV_SEQ_ADDRESS_BROADCAST) { | |
925 | event->dest.client = SNDRV_SEQ_ADDRESS_BROADCAST; | |
926 | event->queue = SNDRV_SEQ_QUEUE_DIRECT; | |
927 | } | |
928 | #endif | |
929 | if (event->dest.client == SNDRV_SEQ_ADDRESS_SUBSCRIBERS) { | |
930 | /* check presence of source port */ | |
c7e0b5bf | 931 | struct snd_seq_client_port *src_port = snd_seq_port_use_ptr(client, event->source.port); |
1da177e4 LT |
932 | if (src_port == NULL) |
933 | return -EINVAL; | |
934 | snd_seq_port_unlock(src_port); | |
935 | } | |
936 | ||
937 | /* direct event processing without enqueued */ | |
938 | if (snd_seq_ev_is_direct(event)) { | |
939 | if (event->type == SNDRV_SEQ_EVENT_NOTE) | |
940 | return -EINVAL; /* this event must be enqueued! */ | |
941 | return snd_seq_deliver_event(client, event, atomic, hop); | |
942 | } | |
943 | ||
944 | /* Not direct, normal queuing */ | |
945 | if (snd_seq_queue_is_used(event->queue, client->number) <= 0) | |
946 | return -EINVAL; /* invalid queue */ | |
947 | if (! snd_seq_write_pool_allocated(client)) | |
948 | return -ENXIO; /* queue is not allocated */ | |
949 | ||
950 | /* allocate an event cell */ | |
951 | err = snd_seq_event_dup(client->pool, event, &cell, !blocking || atomic, file); | |
952 | if (err < 0) | |
953 | return err; | |
954 | ||
955 | /* we got a cell. enqueue it. */ | |
956 | if ((err = snd_seq_enqueue_event(cell, atomic, hop)) < 0) { | |
957 | snd_seq_cell_free(cell); | |
958 | return err; | |
959 | } | |
960 | ||
961 | return 0; | |
962 | } | |
963 | ||
964 | ||
965 | /* | |
966 | * check validity of event type and data length. | |
967 | * return non-zero if invalid. | |
968 | */ | |
c7e0b5bf | 969 | static int check_event_type_and_length(struct snd_seq_event *ev) |
1da177e4 LT |
970 | { |
971 | switch (snd_seq_ev_length_type(ev)) { | |
972 | case SNDRV_SEQ_EVENT_LENGTH_FIXED: | |
973 | if (snd_seq_ev_is_variable_type(ev)) | |
974 | return -EINVAL; | |
975 | break; | |
976 | case SNDRV_SEQ_EVENT_LENGTH_VARIABLE: | |
977 | if (! snd_seq_ev_is_variable_type(ev) || | |
978 | (ev->data.ext.len & ~SNDRV_SEQ_EXT_MASK) >= SNDRV_SEQ_MAX_EVENT_LEN) | |
979 | return -EINVAL; | |
980 | break; | |
981 | case SNDRV_SEQ_EVENT_LENGTH_VARUSR: | |
e5723b41 | 982 | if (! snd_seq_ev_is_direct(ev)) |
1da177e4 LT |
983 | return -EINVAL; |
984 | break; | |
985 | } | |
986 | return 0; | |
987 | } | |
988 | ||
989 | ||
990 | /* handle write() */ | |
991 | /* possible error values: | |
992 | * -ENXIO invalid client or file open mode | |
993 | * -ENOMEM malloc failed | |
994 | * -EFAULT seg. fault during copy from user space | |
995 | * -EINVAL invalid event | |
996 | * -EAGAIN no space in output pool | |
997 | * -EINTR interrupts while sleep | |
998 | * -EMLINK too many hops | |
999 | * others depends on return value from driver callback | |
1000 | */ | |
c7e0b5bf TI |
1001 | static ssize_t snd_seq_write(struct file *file, const char __user *buf, |
1002 | size_t count, loff_t *offset) | |
1da177e4 | 1003 | { |
c7e0b5bf | 1004 | struct snd_seq_client *client = file->private_data; |
1da177e4 LT |
1005 | int written = 0, len; |
1006 | int err = -EINVAL; | |
c7e0b5bf | 1007 | struct snd_seq_event event; |
1da177e4 LT |
1008 | |
1009 | if (!(snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_OUTPUT)) | |
1010 | return -ENXIO; | |
1011 | ||
1012 | /* check client structures are in place */ | |
7eaa943c TI |
1013 | if (snd_BUG_ON(!client)) |
1014 | return -ENXIO; | |
1da177e4 LT |
1015 | |
1016 | if (!client->accept_output || client->pool == NULL) | |
1017 | return -ENXIO; | |
1018 | ||
1019 | /* allocate the pool now if the pool is not allocated yet */ | |
1020 | if (client->pool->size > 0 && !snd_seq_write_pool_allocated(client)) { | |
1021 | if (snd_seq_pool_init(client->pool) < 0) | |
1022 | return -ENOMEM; | |
1023 | } | |
1024 | ||
1025 | /* only process whole events */ | |
c7e0b5bf | 1026 | while (count >= sizeof(struct snd_seq_event)) { |
1da177e4 LT |
1027 | /* Read in the event header from the user */ |
1028 | len = sizeof(event); | |
1029 | if (copy_from_user(&event, buf, len)) { | |
1030 | err = -EFAULT; | |
1031 | break; | |
1032 | } | |
1033 | event.source.client = client->number; /* fill in client number */ | |
1034 | /* Check for extension data length */ | |
1035 | if (check_event_type_and_length(&event)) { | |
1036 | err = -EINVAL; | |
1037 | break; | |
1038 | } | |
1039 | ||
1040 | /* check for special events */ | |
1041 | if (event.type == SNDRV_SEQ_EVENT_NONE) | |
1042 | goto __skip_event; | |
1043 | else if (snd_seq_ev_is_reserved(&event)) { | |
1044 | err = -EINVAL; | |
1045 | break; | |
1046 | } | |
1047 | ||
1048 | if (snd_seq_ev_is_variable(&event)) { | |
1049 | int extlen = event.data.ext.len & ~SNDRV_SEQ_EXT_MASK; | |
1050 | if ((size_t)(extlen + len) > count) { | |
1051 | /* back out, will get an error this time or next */ | |
1052 | err = -EINVAL; | |
1053 | break; | |
1054 | } | |
1055 | /* set user space pointer */ | |
1056 | event.data.ext.len = extlen | SNDRV_SEQ_EXT_USRPTR; | |
4d23359b | 1057 | event.data.ext.ptr = (char __force *)buf |
c7e0b5bf | 1058 | + sizeof(struct snd_seq_event); |
1da177e4 LT |
1059 | len += extlen; /* increment data length */ |
1060 | } else { | |
1061 | #ifdef CONFIG_COMPAT | |
1062 | if (client->convert32 && snd_seq_ev_is_varusr(&event)) { | |
fea952e5 | 1063 | void *ptr = (void __force *)compat_ptr(event.data.raw32.d[1]); |
1da177e4 LT |
1064 | event.data.ext.ptr = ptr; |
1065 | } | |
1066 | #endif | |
1067 | } | |
1068 | ||
1069 | /* ok, enqueue it */ | |
1070 | err = snd_seq_client_enqueue_event(client, &event, file, | |
1071 | !(file->f_flags & O_NONBLOCK), | |
1072 | 0, 0); | |
1073 | if (err < 0) | |
1074 | break; | |
1075 | ||
1076 | __skip_event: | |
1077 | /* Update pointers and counts */ | |
1078 | count -= len; | |
1079 | buf += len; | |
1080 | written += len; | |
1081 | } | |
1082 | ||
1083 | return written ? written : err; | |
1084 | } | |
1085 | ||
1086 | ||
1087 | /* | |
1088 | * handle polling | |
1089 | */ | |
1090 | static unsigned int snd_seq_poll(struct file *file, poll_table * wait) | |
1091 | { | |
c7e0b5bf | 1092 | struct snd_seq_client *client = file->private_data; |
1da177e4 LT |
1093 | unsigned int mask = 0; |
1094 | ||
1095 | /* check client structures are in place */ | |
7eaa943c TI |
1096 | if (snd_BUG_ON(!client)) |
1097 | return -ENXIO; | |
1da177e4 LT |
1098 | |
1099 | if ((snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_INPUT) && | |
1100 | client->data.user.fifo) { | |
1101 | ||
1102 | /* check if data is available in the outqueue */ | |
1103 | if (snd_seq_fifo_poll_wait(client->data.user.fifo, file, wait)) | |
1104 | mask |= POLLIN | POLLRDNORM; | |
1105 | } | |
1106 | ||
1107 | if (snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_OUTPUT) { | |
1108 | ||
1109 | /* check if data is available in the pool */ | |
1110 | if (!snd_seq_write_pool_allocated(client) || | |
1111 | snd_seq_pool_poll_wait(client->pool, file, wait)) | |
1112 | mask |= POLLOUT | POLLWRNORM; | |
1113 | } | |
1114 | ||
1115 | return mask; | |
1116 | } | |
1117 | ||
1118 | ||
1119 | /*-----------------------------------------------------*/ | |
1120 | ||
04a56dd8 TS |
1121 | static int snd_seq_ioctl_pversion(struct snd_seq_client *client, void *arg) |
1122 | { | |
1123 | int *pversion = arg; | |
1124 | ||
1125 | *pversion = SNDRV_SEQ_VERSION; | |
1126 | return 0; | |
1127 | } | |
1128 | ||
1129 | static int snd_seq_ioctl_client_id(struct snd_seq_client *client, void *arg) | |
1130 | { | |
1131 | int *client_id = arg; | |
1132 | ||
1133 | *client_id = client->number; | |
1134 | return 0; | |
1135 | } | |
1da177e4 LT |
1136 | |
1137 | /* SYSTEM_INFO ioctl() */ | |
04a56dd8 | 1138 | static int snd_seq_ioctl_system_info(struct snd_seq_client *client, void *arg) |
1da177e4 | 1139 | { |
04a56dd8 | 1140 | struct snd_seq_system_info *info = arg; |
1da177e4 | 1141 | |
04a56dd8 | 1142 | memset(info, 0, sizeof(*info)); |
1da177e4 | 1143 | /* fill the info fields */ |
04a56dd8 TS |
1144 | info->queues = SNDRV_SEQ_MAX_QUEUES; |
1145 | info->clients = SNDRV_SEQ_MAX_CLIENTS; | |
1146 | info->ports = SNDRV_SEQ_MAX_PORTS; | |
1147 | info->channels = 256; /* fixed limit */ | |
1148 | info->cur_clients = client_usage.cur; | |
1149 | info->cur_queues = snd_seq_queue_get_cur_queues(); | |
1150 | ||
1da177e4 LT |
1151 | return 0; |
1152 | } | |
1153 | ||
1154 | ||
1155 | /* RUNNING_MODE ioctl() */ | |
04a56dd8 | 1156 | static int snd_seq_ioctl_running_mode(struct snd_seq_client *client, void *arg) |
1da177e4 | 1157 | { |
04a56dd8 | 1158 | struct snd_seq_running_info *info = arg; |
c7e0b5bf | 1159 | struct snd_seq_client *cptr; |
1da177e4 LT |
1160 | int err = 0; |
1161 | ||
1da177e4 | 1162 | /* requested client number */ |
04a56dd8 | 1163 | cptr = snd_seq_client_use_ptr(info->client); |
1da177e4 LT |
1164 | if (cptr == NULL) |
1165 | return -ENOENT; /* don't change !!! */ | |
1166 | ||
1167 | #ifdef SNDRV_BIG_ENDIAN | |
04a56dd8 | 1168 | if (!info->big_endian) { |
1da177e4 LT |
1169 | err = -EINVAL; |
1170 | goto __err; | |
1171 | } | |
1172 | #else | |
04a56dd8 | 1173 | if (info->big_endian) { |
1da177e4 LT |
1174 | err = -EINVAL; |
1175 | goto __err; | |
1176 | } | |
1177 | ||
1178 | #endif | |
04a56dd8 | 1179 | if (info->cpu_mode > sizeof(long)) { |
1da177e4 LT |
1180 | err = -EINVAL; |
1181 | goto __err; | |
1182 | } | |
04a56dd8 | 1183 | cptr->convert32 = (info->cpu_mode < sizeof(long)); |
1da177e4 LT |
1184 | __err: |
1185 | snd_seq_client_unlock(cptr); | |
1186 | return err; | |
1187 | } | |
1188 | ||
1189 | /* CLIENT_INFO ioctl() */ | |
c7e0b5bf TI |
1190 | static void get_client_info(struct snd_seq_client *cptr, |
1191 | struct snd_seq_client_info *info) | |
1da177e4 LT |
1192 | { |
1193 | info->client = cptr->number; | |
1194 | ||
1195 | /* fill the info fields */ | |
1196 | info->type = cptr->type; | |
1197 | strcpy(info->name, cptr->name); | |
1198 | info->filter = cptr->filter; | |
1199 | info->event_lost = cptr->event_lost; | |
1200 | memcpy(info->event_filter, cptr->event_filter, 32); | |
1201 | info->num_ports = cptr->num_ports; | |
a1ce94d0 MK |
1202 | |
1203 | if (cptr->type == USER_CLIENT) | |
1204 | info->pid = pid_vnr(cptr->data.user.owner); | |
1205 | else | |
1206 | info->pid = -1; | |
1207 | ||
1208 | if (cptr->type == KERNEL_CLIENT) | |
1209 | info->card = cptr->data.kernel.card ? cptr->data.kernel.card->number : -1; | |
1210 | else | |
1211 | info->card = -1; | |
1212 | ||
1da177e4 LT |
1213 | memset(info->reserved, 0, sizeof(info->reserved)); |
1214 | } | |
1215 | ||
c7e0b5bf | 1216 | static int snd_seq_ioctl_get_client_info(struct snd_seq_client *client, |
04a56dd8 | 1217 | void *arg) |
1da177e4 | 1218 | { |
04a56dd8 | 1219 | struct snd_seq_client_info *client_info = arg; |
c7e0b5bf | 1220 | struct snd_seq_client *cptr; |
1da177e4 LT |
1221 | |
1222 | /* requested client number */ | |
04a56dd8 | 1223 | cptr = snd_seq_client_use_ptr(client_info->client); |
1da177e4 LT |
1224 | if (cptr == NULL) |
1225 | return -ENOENT; /* don't change !!! */ | |
1226 | ||
04a56dd8 | 1227 | get_client_info(cptr, client_info); |
1da177e4 LT |
1228 | snd_seq_client_unlock(cptr); |
1229 | ||
1da177e4 LT |
1230 | return 0; |
1231 | } | |
1232 | ||
1233 | ||
1234 | /* CLIENT_INFO ioctl() */ | |
c7e0b5bf | 1235 | static int snd_seq_ioctl_set_client_info(struct snd_seq_client *client, |
04a56dd8 | 1236 | void *arg) |
1da177e4 | 1237 | { |
04a56dd8 | 1238 | struct snd_seq_client_info *client_info = arg; |
1da177e4 LT |
1239 | |
1240 | /* it is not allowed to set the info fields for an another client */ | |
04a56dd8 | 1241 | if (client->number != client_info->client) |
1da177e4 LT |
1242 | return -EPERM; |
1243 | /* also client type must be set now */ | |
04a56dd8 | 1244 | if (client->type != client_info->type) |
1da177e4 LT |
1245 | return -EINVAL; |
1246 | ||
1247 | /* fill the info fields */ | |
04a56dd8 TS |
1248 | if (client_info->name[0]) |
1249 | strlcpy(client->name, client_info->name, sizeof(client->name)); | |
1da177e4 | 1250 | |
04a56dd8 TS |
1251 | client->filter = client_info->filter; |
1252 | client->event_lost = client_info->event_lost; | |
1253 | memcpy(client->event_filter, client_info->event_filter, 32); | |
1da177e4 LT |
1254 | |
1255 | return 0; | |
1256 | } | |
1257 | ||
1258 | ||
1259 | /* | |
1260 | * CREATE PORT ioctl() | |
1261 | */ | |
04a56dd8 | 1262 | static int snd_seq_ioctl_create_port(struct snd_seq_client *client, void *arg) |
1da177e4 | 1263 | { |
04a56dd8 | 1264 | struct snd_seq_port_info *info = arg; |
c7e0b5bf | 1265 | struct snd_seq_client_port *port; |
c7e0b5bf | 1266 | struct snd_seq_port_callback *callback; |
71105998 | 1267 | int port_idx; |
1da177e4 | 1268 | |
1da177e4 | 1269 | /* it is not allowed to create the port for an another client */ |
04a56dd8 | 1270 | if (info->addr.client != client->number) |
1da177e4 LT |
1271 | return -EPERM; |
1272 | ||
04a56dd8 | 1273 | port = snd_seq_create_port(client, (info->flags & SNDRV_SEQ_PORT_FLG_GIVEN_PORT) ? info->addr.port : -1); |
1da177e4 LT |
1274 | if (port == NULL) |
1275 | return -ENOMEM; | |
1276 | ||
04a56dd8 | 1277 | if (client->type == USER_CLIENT && info->kernel) { |
71105998 TI |
1278 | port_idx = port->addr.port; |
1279 | snd_seq_port_unlock(port); | |
1280 | snd_seq_delete_port(client, port_idx); | |
1da177e4 LT |
1281 | return -EINVAL; |
1282 | } | |
1283 | if (client->type == KERNEL_CLIENT) { | |
04a56dd8 | 1284 | if ((callback = info->kernel) != NULL) { |
1da177e4 LT |
1285 | if (callback->owner) |
1286 | port->owner = callback->owner; | |
1287 | port->private_data = callback->private_data; | |
1288 | port->private_free = callback->private_free; | |
1da177e4 LT |
1289 | port->event_input = callback->event_input; |
1290 | port->c_src.open = callback->subscribe; | |
1291 | port->c_src.close = callback->unsubscribe; | |
1292 | port->c_dest.open = callback->use; | |
1293 | port->c_dest.close = callback->unuse; | |
1294 | } | |
1295 | } | |
1296 | ||
04a56dd8 | 1297 | info->addr = port->addr; |
1da177e4 | 1298 | |
04a56dd8 | 1299 | snd_seq_set_port_info(port, info); |
1da177e4 | 1300 | snd_seq_system_client_ev_port_start(port->addr.client, port->addr.port); |
71105998 | 1301 | snd_seq_port_unlock(port); |
1da177e4 | 1302 | |
1da177e4 LT |
1303 | return 0; |
1304 | } | |
1305 | ||
1306 | /* | |
1307 | * DELETE PORT ioctl() | |
1308 | */ | |
04a56dd8 | 1309 | static int snd_seq_ioctl_delete_port(struct snd_seq_client *client, void *arg) |
1da177e4 | 1310 | { |
04a56dd8 | 1311 | struct snd_seq_port_info *info = arg; |
1da177e4 LT |
1312 | int err; |
1313 | ||
1da177e4 | 1314 | /* it is not allowed to remove the port for an another client */ |
04a56dd8 | 1315 | if (info->addr.client != client->number) |
1da177e4 LT |
1316 | return -EPERM; |
1317 | ||
04a56dd8 | 1318 | err = snd_seq_delete_port(client, info->addr.port); |
1da177e4 | 1319 | if (err >= 0) |
04a56dd8 | 1320 | snd_seq_system_client_ev_port_exit(client->number, info->addr.port); |
1da177e4 LT |
1321 | return err; |
1322 | } | |
1323 | ||
1324 | ||
1325 | /* | |
1326 | * GET_PORT_INFO ioctl() (on any client) | |
1327 | */ | |
04a56dd8 | 1328 | static int snd_seq_ioctl_get_port_info(struct snd_seq_client *client, void *arg) |
1da177e4 | 1329 | { |
04a56dd8 | 1330 | struct snd_seq_port_info *info = arg; |
c7e0b5bf TI |
1331 | struct snd_seq_client *cptr; |
1332 | struct snd_seq_client_port *port; | |
1da177e4 | 1333 | |
04a56dd8 | 1334 | cptr = snd_seq_client_use_ptr(info->addr.client); |
1da177e4 LT |
1335 | if (cptr == NULL) |
1336 | return -ENXIO; | |
1337 | ||
04a56dd8 | 1338 | port = snd_seq_port_use_ptr(cptr, info->addr.port); |
1da177e4 LT |
1339 | if (port == NULL) { |
1340 | snd_seq_client_unlock(cptr); | |
1341 | return -ENOENT; /* don't change */ | |
1342 | } | |
1343 | ||
1344 | /* get port info */ | |
04a56dd8 | 1345 | snd_seq_get_port_info(port, info); |
1da177e4 LT |
1346 | snd_seq_port_unlock(port); |
1347 | snd_seq_client_unlock(cptr); | |
1348 | ||
1da177e4 LT |
1349 | return 0; |
1350 | } | |
1351 | ||
1352 | ||
1353 | /* | |
1354 | * SET_PORT_INFO ioctl() (only ports on this/own client) | |
1355 | */ | |
04a56dd8 | 1356 | static int snd_seq_ioctl_set_port_info(struct snd_seq_client *client, void *arg) |
1da177e4 | 1357 | { |
04a56dd8 | 1358 | struct snd_seq_port_info *info = arg; |
c7e0b5bf | 1359 | struct snd_seq_client_port *port; |
1da177e4 | 1360 | |
04a56dd8 | 1361 | if (info->addr.client != client->number) /* only set our own ports ! */ |
1da177e4 | 1362 | return -EPERM; |
04a56dd8 | 1363 | port = snd_seq_port_use_ptr(client, info->addr.port); |
1da177e4 | 1364 | if (port) { |
04a56dd8 | 1365 | snd_seq_set_port_info(port, info); |
1da177e4 LT |
1366 | snd_seq_port_unlock(port); |
1367 | } | |
1368 | return 0; | |
1369 | } | |
1370 | ||
1371 | ||
1372 | /* | |
1373 | * port subscription (connection) | |
1374 | */ | |
1375 | #define PERM_RD (SNDRV_SEQ_PORT_CAP_READ|SNDRV_SEQ_PORT_CAP_SUBS_READ) | |
1376 | #define PERM_WR (SNDRV_SEQ_PORT_CAP_WRITE|SNDRV_SEQ_PORT_CAP_SUBS_WRITE) | |
1377 | ||
c7e0b5bf TI |
1378 | static int check_subscription_permission(struct snd_seq_client *client, |
1379 | struct snd_seq_client_port *sport, | |
1380 | struct snd_seq_client_port *dport, | |
1381 | struct snd_seq_port_subscribe *subs) | |
1da177e4 LT |
1382 | { |
1383 | if (client->number != subs->sender.client && | |
1384 | client->number != subs->dest.client) { | |
1385 | /* connection by third client - check export permission */ | |
1386 | if (check_port_perm(sport, SNDRV_SEQ_PORT_CAP_NO_EXPORT)) | |
1387 | return -EPERM; | |
1388 | if (check_port_perm(dport, SNDRV_SEQ_PORT_CAP_NO_EXPORT)) | |
1389 | return -EPERM; | |
1390 | } | |
1391 | ||
1392 | /* check read permission */ | |
1393 | /* if sender or receiver is the subscribing client itself, | |
1394 | * no permission check is necessary | |
1395 | */ | |
1396 | if (client->number != subs->sender.client) { | |
1397 | if (! check_port_perm(sport, PERM_RD)) | |
1398 | return -EPERM; | |
1399 | } | |
1400 | /* check write permission */ | |
1401 | if (client->number != subs->dest.client) { | |
1402 | if (! check_port_perm(dport, PERM_WR)) | |
1403 | return -EPERM; | |
1404 | } | |
1405 | return 0; | |
1406 | } | |
1407 | ||
1408 | /* | |
1409 | * send an subscription notify event to user client: | |
1410 | * client must be user client. | |
1411 | */ | |
1412 | int snd_seq_client_notify_subscription(int client, int port, | |
c7e0b5bf TI |
1413 | struct snd_seq_port_subscribe *info, |
1414 | int evtype) | |
1da177e4 | 1415 | { |
c7e0b5bf | 1416 | struct snd_seq_event event; |
1da177e4 LT |
1417 | |
1418 | memset(&event, 0, sizeof(event)); | |
1419 | event.type = evtype; | |
1420 | event.data.connect.dest = info->dest; | |
1421 | event.data.connect.sender = info->sender; | |
1422 | ||
1423 | return snd_seq_system_notify(client, port, &event); /* non-atomic */ | |
1424 | } | |
1425 | ||
1426 | ||
1427 | /* | |
1428 | * add to port's subscription list IOCTL interface | |
1429 | */ | |
c7e0b5bf | 1430 | static int snd_seq_ioctl_subscribe_port(struct snd_seq_client *client, |
04a56dd8 | 1431 | void *arg) |
1da177e4 | 1432 | { |
04a56dd8 | 1433 | struct snd_seq_port_subscribe *subs = arg; |
1da177e4 | 1434 | int result = -EINVAL; |
c7e0b5bf TI |
1435 | struct snd_seq_client *receiver = NULL, *sender = NULL; |
1436 | struct snd_seq_client_port *sport = NULL, *dport = NULL; | |
1da177e4 | 1437 | |
04a56dd8 | 1438 | if ((receiver = snd_seq_client_use_ptr(subs->dest.client)) == NULL) |
1da177e4 | 1439 | goto __end; |
04a56dd8 | 1440 | if ((sender = snd_seq_client_use_ptr(subs->sender.client)) == NULL) |
1da177e4 | 1441 | goto __end; |
04a56dd8 | 1442 | if ((sport = snd_seq_port_use_ptr(sender, subs->sender.port)) == NULL) |
1da177e4 | 1443 | goto __end; |
04a56dd8 | 1444 | if ((dport = snd_seq_port_use_ptr(receiver, subs->dest.port)) == NULL) |
1da177e4 LT |
1445 | goto __end; |
1446 | ||
04a56dd8 | 1447 | result = check_subscription_permission(client, sport, dport, subs); |
1da177e4 LT |
1448 | if (result < 0) |
1449 | goto __end; | |
1450 | ||
1451 | /* connect them */ | |
04a56dd8 | 1452 | result = snd_seq_port_connect(client, sender, sport, receiver, dport, subs); |
1da177e4 LT |
1453 | if (! result) /* broadcast announce */ |
1454 | snd_seq_client_notify_subscription(SNDRV_SEQ_ADDRESS_SUBSCRIBERS, 0, | |
04a56dd8 | 1455 | subs, SNDRV_SEQ_EVENT_PORT_SUBSCRIBED); |
1da177e4 LT |
1456 | __end: |
1457 | if (sport) | |
1458 | snd_seq_port_unlock(sport); | |
1459 | if (dport) | |
1460 | snd_seq_port_unlock(dport); | |
1461 | if (sender) | |
1462 | snd_seq_client_unlock(sender); | |
1463 | if (receiver) | |
1464 | snd_seq_client_unlock(receiver); | |
1465 | return result; | |
1466 | } | |
1467 | ||
1468 | ||
1469 | /* | |
1470 | * remove from port's subscription list | |
1471 | */ | |
c7e0b5bf | 1472 | static int snd_seq_ioctl_unsubscribe_port(struct snd_seq_client *client, |
04a56dd8 | 1473 | void *arg) |
1da177e4 | 1474 | { |
04a56dd8 | 1475 | struct snd_seq_port_subscribe *subs = arg; |
1da177e4 | 1476 | int result = -ENXIO; |
c7e0b5bf TI |
1477 | struct snd_seq_client *receiver = NULL, *sender = NULL; |
1478 | struct snd_seq_client_port *sport = NULL, *dport = NULL; | |
1da177e4 | 1479 | |
04a56dd8 | 1480 | if ((receiver = snd_seq_client_use_ptr(subs->dest.client)) == NULL) |
1da177e4 | 1481 | goto __end; |
04a56dd8 | 1482 | if ((sender = snd_seq_client_use_ptr(subs->sender.client)) == NULL) |
1da177e4 | 1483 | goto __end; |
04a56dd8 | 1484 | if ((sport = snd_seq_port_use_ptr(sender, subs->sender.port)) == NULL) |
1da177e4 | 1485 | goto __end; |
04a56dd8 | 1486 | if ((dport = snd_seq_port_use_ptr(receiver, subs->dest.port)) == NULL) |
1da177e4 LT |
1487 | goto __end; |
1488 | ||
04a56dd8 | 1489 | result = check_subscription_permission(client, sport, dport, subs); |
1da177e4 LT |
1490 | if (result < 0) |
1491 | goto __end; | |
1492 | ||
04a56dd8 | 1493 | result = snd_seq_port_disconnect(client, sender, sport, receiver, dport, subs); |
1da177e4 LT |
1494 | if (! result) /* broadcast announce */ |
1495 | snd_seq_client_notify_subscription(SNDRV_SEQ_ADDRESS_SUBSCRIBERS, 0, | |
04a56dd8 | 1496 | subs, SNDRV_SEQ_EVENT_PORT_UNSUBSCRIBED); |
1da177e4 LT |
1497 | __end: |
1498 | if (sport) | |
1499 | snd_seq_port_unlock(sport); | |
1500 | if (dport) | |
1501 | snd_seq_port_unlock(dport); | |
1502 | if (sender) | |
1503 | snd_seq_client_unlock(sender); | |
1504 | if (receiver) | |
1505 | snd_seq_client_unlock(receiver); | |
1506 | return result; | |
1507 | } | |
1508 | ||
1509 | ||
1510 | /* CREATE_QUEUE ioctl() */ | |
04a56dd8 | 1511 | static int snd_seq_ioctl_create_queue(struct snd_seq_client *client, void *arg) |
1da177e4 | 1512 | { |
04a56dd8 | 1513 | struct snd_seq_queue_info *info = arg; |
c7e0b5bf | 1514 | struct snd_seq_queue *q; |
1da177e4 | 1515 | |
7e1d90f6 DM |
1516 | q = snd_seq_queue_alloc(client->number, info->locked, info->flags); |
1517 | if (IS_ERR(q)) | |
1518 | return PTR_ERR(q); | |
1da177e4 | 1519 | |
04a56dd8 TS |
1520 | info->queue = q->queue; |
1521 | info->locked = q->locked; | |
1522 | info->owner = q->owner; | |
1da177e4 LT |
1523 | |
1524 | /* set queue name */ | |
04a56dd8 TS |
1525 | if (!info->name[0]) |
1526 | snprintf(info->name, sizeof(info->name), "Queue-%d", q->queue); | |
1527 | strlcpy(q->name, info->name, sizeof(q->name)); | |
7e1d90f6 | 1528 | snd_use_lock_free(&q->use_lock); |
1da177e4 | 1529 | |
1da177e4 LT |
1530 | return 0; |
1531 | } | |
1532 | ||
1533 | /* DELETE_QUEUE ioctl() */ | |
04a56dd8 | 1534 | static int snd_seq_ioctl_delete_queue(struct snd_seq_client *client, void *arg) |
1da177e4 | 1535 | { |
04a56dd8 | 1536 | struct snd_seq_queue_info *info = arg; |
1da177e4 | 1537 | |
04a56dd8 | 1538 | return snd_seq_queue_delete(client->number, info->queue); |
1da177e4 LT |
1539 | } |
1540 | ||
1541 | /* GET_QUEUE_INFO ioctl() */ | |
c7e0b5bf | 1542 | static int snd_seq_ioctl_get_queue_info(struct snd_seq_client *client, |
04a56dd8 | 1543 | void *arg) |
1da177e4 | 1544 | { |
04a56dd8 | 1545 | struct snd_seq_queue_info *info = arg; |
c7e0b5bf | 1546 | struct snd_seq_queue *q; |
1da177e4 | 1547 | |
04a56dd8 | 1548 | q = queueptr(info->queue); |
1da177e4 LT |
1549 | if (q == NULL) |
1550 | return -EINVAL; | |
1551 | ||
04a56dd8 TS |
1552 | memset(info, 0, sizeof(*info)); |
1553 | info->queue = q->queue; | |
1554 | info->owner = q->owner; | |
1555 | info->locked = q->locked; | |
1556 | strlcpy(info->name, q->name, sizeof(info->name)); | |
1da177e4 LT |
1557 | queuefree(q); |
1558 | ||
1da177e4 LT |
1559 | return 0; |
1560 | } | |
1561 | ||
1562 | /* SET_QUEUE_INFO ioctl() */ | |
c7e0b5bf | 1563 | static int snd_seq_ioctl_set_queue_info(struct snd_seq_client *client, |
04a56dd8 | 1564 | void *arg) |
1da177e4 | 1565 | { |
04a56dd8 | 1566 | struct snd_seq_queue_info *info = arg; |
c7e0b5bf | 1567 | struct snd_seq_queue *q; |
1da177e4 | 1568 | |
04a56dd8 | 1569 | if (info->owner != client->number) |
1da177e4 LT |
1570 | return -EINVAL; |
1571 | ||
1572 | /* change owner/locked permission */ | |
04a56dd8 TS |
1573 | if (snd_seq_queue_check_access(info->queue, client->number)) { |
1574 | if (snd_seq_queue_set_owner(info->queue, client->number, info->locked) < 0) | |
1da177e4 | 1575 | return -EPERM; |
04a56dd8 TS |
1576 | if (info->locked) |
1577 | snd_seq_queue_use(info->queue, client->number, 1); | |
1da177e4 LT |
1578 | } else { |
1579 | return -EPERM; | |
1580 | } | |
1581 | ||
04a56dd8 | 1582 | q = queueptr(info->queue); |
1da177e4 LT |
1583 | if (! q) |
1584 | return -EINVAL; | |
1585 | if (q->owner != client->number) { | |
1586 | queuefree(q); | |
1587 | return -EPERM; | |
1588 | } | |
04a56dd8 | 1589 | strlcpy(q->name, info->name, sizeof(q->name)); |
1da177e4 LT |
1590 | queuefree(q); |
1591 | ||
1592 | return 0; | |
1593 | } | |
1594 | ||
1595 | /* GET_NAMED_QUEUE ioctl() */ | |
04a56dd8 TS |
1596 | static int snd_seq_ioctl_get_named_queue(struct snd_seq_client *client, |
1597 | void *arg) | |
1da177e4 | 1598 | { |
04a56dd8 | 1599 | struct snd_seq_queue_info *info = arg; |
c7e0b5bf | 1600 | struct snd_seq_queue *q; |
1da177e4 | 1601 | |
04a56dd8 | 1602 | q = snd_seq_queue_find_name(info->name); |
1da177e4 LT |
1603 | if (q == NULL) |
1604 | return -EINVAL; | |
04a56dd8 TS |
1605 | info->queue = q->queue; |
1606 | info->owner = q->owner; | |
1607 | info->locked = q->locked; | |
1da177e4 LT |
1608 | queuefree(q); |
1609 | ||
1da177e4 LT |
1610 | return 0; |
1611 | } | |
1612 | ||
1613 | /* GET_QUEUE_STATUS ioctl() */ | |
c7e0b5bf | 1614 | static int snd_seq_ioctl_get_queue_status(struct snd_seq_client *client, |
04a56dd8 | 1615 | void *arg) |
1da177e4 | 1616 | { |
04a56dd8 | 1617 | struct snd_seq_queue_status *status = arg; |
c7e0b5bf TI |
1618 | struct snd_seq_queue *queue; |
1619 | struct snd_seq_timer *tmr; | |
1da177e4 | 1620 | |
04a56dd8 | 1621 | queue = queueptr(status->queue); |
1da177e4 LT |
1622 | if (queue == NULL) |
1623 | return -EINVAL; | |
04a56dd8 TS |
1624 | memset(status, 0, sizeof(*status)); |
1625 | status->queue = queue->queue; | |
1da177e4 LT |
1626 | |
1627 | tmr = queue->timer; | |
04a56dd8 | 1628 | status->events = queue->tickq->cells + queue->timeq->cells; |
1da177e4 | 1629 | |
04a56dd8 TS |
1630 | status->time = snd_seq_timer_get_cur_time(tmr); |
1631 | status->tick = snd_seq_timer_get_cur_tick(tmr); | |
1da177e4 | 1632 | |
04a56dd8 | 1633 | status->running = tmr->running; |
1da177e4 | 1634 | |
04a56dd8 | 1635 | status->flags = queue->flags; |
1da177e4 LT |
1636 | queuefree(queue); |
1637 | ||
1da177e4 LT |
1638 | return 0; |
1639 | } | |
1640 | ||
1641 | ||
1642 | /* GET_QUEUE_TEMPO ioctl() */ | |
c7e0b5bf | 1643 | static int snd_seq_ioctl_get_queue_tempo(struct snd_seq_client *client, |
04a56dd8 | 1644 | void *arg) |
1da177e4 | 1645 | { |
04a56dd8 | 1646 | struct snd_seq_queue_tempo *tempo = arg; |
c7e0b5bf TI |
1647 | struct snd_seq_queue *queue; |
1648 | struct snd_seq_timer *tmr; | |
1da177e4 | 1649 | |
04a56dd8 | 1650 | queue = queueptr(tempo->queue); |
1da177e4 LT |
1651 | if (queue == NULL) |
1652 | return -EINVAL; | |
04a56dd8 TS |
1653 | memset(tempo, 0, sizeof(*tempo)); |
1654 | tempo->queue = queue->queue; | |
1da177e4 LT |
1655 | |
1656 | tmr = queue->timer; | |
1657 | ||
04a56dd8 TS |
1658 | tempo->tempo = tmr->tempo; |
1659 | tempo->ppq = tmr->ppq; | |
1660 | tempo->skew_value = tmr->skew; | |
1661 | tempo->skew_base = tmr->skew_base; | |
1da177e4 LT |
1662 | queuefree(queue); |
1663 | ||
1da177e4 LT |
1664 | return 0; |
1665 | } | |
1666 | ||
1667 | ||
1668 | /* SET_QUEUE_TEMPO ioctl() */ | |
c7e0b5bf | 1669 | int snd_seq_set_queue_tempo(int client, struct snd_seq_queue_tempo *tempo) |
1da177e4 LT |
1670 | { |
1671 | if (!snd_seq_queue_check_access(tempo->queue, client)) | |
1672 | return -EPERM; | |
1673 | return snd_seq_queue_timer_set_tempo(tempo->queue, client, tempo); | |
1674 | } | |
91715ed9 TI |
1675 | EXPORT_SYMBOL(snd_seq_set_queue_tempo); |
1676 | ||
c7e0b5bf | 1677 | static int snd_seq_ioctl_set_queue_tempo(struct snd_seq_client *client, |
04a56dd8 | 1678 | void *arg) |
1da177e4 | 1679 | { |
04a56dd8 | 1680 | struct snd_seq_queue_tempo *tempo = arg; |
1da177e4 | 1681 | int result; |
1da177e4 | 1682 | |
04a56dd8 | 1683 | result = snd_seq_set_queue_tempo(client->number, tempo); |
1da177e4 LT |
1684 | return result < 0 ? result : 0; |
1685 | } | |
1686 | ||
1687 | ||
1688 | /* GET_QUEUE_TIMER ioctl() */ | |
c7e0b5bf | 1689 | static int snd_seq_ioctl_get_queue_timer(struct snd_seq_client *client, |
04a56dd8 | 1690 | void *arg) |
1da177e4 | 1691 | { |
04a56dd8 | 1692 | struct snd_seq_queue_timer *timer = arg; |
c7e0b5bf TI |
1693 | struct snd_seq_queue *queue; |
1694 | struct snd_seq_timer *tmr; | |
1da177e4 | 1695 | |
04a56dd8 | 1696 | queue = queueptr(timer->queue); |
1da177e4 LT |
1697 | if (queue == NULL) |
1698 | return -EINVAL; | |
1699 | ||
1a60d4c5 | 1700 | if (mutex_lock_interruptible(&queue->timer_mutex)) { |
1da177e4 LT |
1701 | queuefree(queue); |
1702 | return -ERESTARTSYS; | |
1703 | } | |
1704 | tmr = queue->timer; | |
04a56dd8 TS |
1705 | memset(timer, 0, sizeof(*timer)); |
1706 | timer->queue = queue->queue; | |
1da177e4 | 1707 | |
04a56dd8 | 1708 | timer->type = tmr->type; |
1da177e4 | 1709 | if (tmr->type == SNDRV_SEQ_TIMER_ALSA) { |
04a56dd8 TS |
1710 | timer->u.alsa.id = tmr->alsa_id; |
1711 | timer->u.alsa.resolution = tmr->preferred_resolution; | |
1da177e4 | 1712 | } |
1a60d4c5 | 1713 | mutex_unlock(&queue->timer_mutex); |
1da177e4 LT |
1714 | queuefree(queue); |
1715 | ||
1da177e4 LT |
1716 | return 0; |
1717 | } | |
1718 | ||
1719 | ||
1720 | /* SET_QUEUE_TIMER ioctl() */ | |
c7e0b5bf | 1721 | static int snd_seq_ioctl_set_queue_timer(struct snd_seq_client *client, |
04a56dd8 | 1722 | void *arg) |
1da177e4 | 1723 | { |
04a56dd8 | 1724 | struct snd_seq_queue_timer *timer = arg; |
1da177e4 | 1725 | int result = 0; |
1da177e4 | 1726 | |
04a56dd8 | 1727 | if (timer->type != SNDRV_SEQ_TIMER_ALSA) |
1da177e4 LT |
1728 | return -EINVAL; |
1729 | ||
04a56dd8 | 1730 | if (snd_seq_queue_check_access(timer->queue, client->number)) { |
c7e0b5bf TI |
1731 | struct snd_seq_queue *q; |
1732 | struct snd_seq_timer *tmr; | |
1da177e4 | 1733 | |
04a56dd8 | 1734 | q = queueptr(timer->queue); |
1da177e4 LT |
1735 | if (q == NULL) |
1736 | return -ENXIO; | |
1a60d4c5 | 1737 | if (mutex_lock_interruptible(&q->timer_mutex)) { |
1da177e4 LT |
1738 | queuefree(q); |
1739 | return -ERESTARTSYS; | |
1740 | } | |
1741 | tmr = q->timer; | |
04a56dd8 TS |
1742 | snd_seq_queue_timer_close(timer->queue); |
1743 | tmr->type = timer->type; | |
1da177e4 | 1744 | if (tmr->type == SNDRV_SEQ_TIMER_ALSA) { |
04a56dd8 TS |
1745 | tmr->alsa_id = timer->u.alsa.id; |
1746 | tmr->preferred_resolution = timer->u.alsa.resolution; | |
1da177e4 | 1747 | } |
04a56dd8 | 1748 | result = snd_seq_queue_timer_open(timer->queue); |
1a60d4c5 | 1749 | mutex_unlock(&q->timer_mutex); |
1da177e4 LT |
1750 | queuefree(q); |
1751 | } else { | |
1752 | return -EPERM; | |
1753 | } | |
1754 | ||
1755 | return result; | |
1756 | } | |
1757 | ||
1758 | ||
1759 | /* GET_QUEUE_CLIENT ioctl() */ | |
c7e0b5bf | 1760 | static int snd_seq_ioctl_get_queue_client(struct snd_seq_client *client, |
04a56dd8 | 1761 | void *arg) |
1da177e4 | 1762 | { |
04a56dd8 | 1763 | struct snd_seq_queue_client *info = arg; |
1da177e4 LT |
1764 | int used; |
1765 | ||
04a56dd8 | 1766 | used = snd_seq_queue_is_used(info->queue, client->number); |
1da177e4 LT |
1767 | if (used < 0) |
1768 | return -EINVAL; | |
04a56dd8 TS |
1769 | info->used = used; |
1770 | info->client = client->number; | |
1da177e4 | 1771 | |
1da177e4 LT |
1772 | return 0; |
1773 | } | |
1774 | ||
1775 | ||
1776 | /* SET_QUEUE_CLIENT ioctl() */ | |
c7e0b5bf | 1777 | static int snd_seq_ioctl_set_queue_client(struct snd_seq_client *client, |
04a56dd8 | 1778 | void *arg) |
1da177e4 | 1779 | { |
04a56dd8 | 1780 | struct snd_seq_queue_client *info = arg; |
1da177e4 | 1781 | int err; |
1da177e4 | 1782 | |
04a56dd8 TS |
1783 | if (info->used >= 0) { |
1784 | err = snd_seq_queue_use(info->queue, client->number, info->used); | |
1da177e4 LT |
1785 | if (err < 0) |
1786 | return err; | |
1787 | } | |
1788 | ||
1789 | return snd_seq_ioctl_get_queue_client(client, arg); | |
1790 | } | |
1791 | ||
1792 | ||
1793 | /* GET_CLIENT_POOL ioctl() */ | |
c7e0b5bf | 1794 | static int snd_seq_ioctl_get_client_pool(struct snd_seq_client *client, |
04a56dd8 | 1795 | void *arg) |
1da177e4 | 1796 | { |
04a56dd8 | 1797 | struct snd_seq_client_pool *info = arg; |
c7e0b5bf | 1798 | struct snd_seq_client *cptr; |
1da177e4 | 1799 | |
04a56dd8 | 1800 | cptr = snd_seq_client_use_ptr(info->client); |
1da177e4 LT |
1801 | if (cptr == NULL) |
1802 | return -ENOENT; | |
04a56dd8 TS |
1803 | memset(info, 0, sizeof(*info)); |
1804 | info->client = cptr->number; | |
1805 | info->output_pool = cptr->pool->size; | |
1806 | info->output_room = cptr->pool->room; | |
1807 | info->output_free = info->output_pool; | |
1808 | info->output_free = snd_seq_unused_cells(cptr->pool); | |
1da177e4 | 1809 | if (cptr->type == USER_CLIENT) { |
04a56dd8 TS |
1810 | info->input_pool = cptr->data.user.fifo_pool_size; |
1811 | info->input_free = info->input_pool; | |
1da177e4 | 1812 | if (cptr->data.user.fifo) |
04a56dd8 | 1813 | info->input_free = snd_seq_unused_cells(cptr->data.user.fifo->pool); |
1da177e4 | 1814 | } else { |
04a56dd8 TS |
1815 | info->input_pool = 0; |
1816 | info->input_free = 0; | |
1da177e4 LT |
1817 | } |
1818 | snd_seq_client_unlock(cptr); | |
1819 | ||
1da177e4 LT |
1820 | return 0; |
1821 | } | |
1822 | ||
1823 | /* SET_CLIENT_POOL ioctl() */ | |
c7e0b5bf | 1824 | static int snd_seq_ioctl_set_client_pool(struct snd_seq_client *client, |
04a56dd8 | 1825 | void *arg) |
1da177e4 | 1826 | { |
04a56dd8 | 1827 | struct snd_seq_client_pool *info = arg; |
1da177e4 LT |
1828 | int rc; |
1829 | ||
04a56dd8 | 1830 | if (client->number != info->client) |
1da177e4 LT |
1831 | return -EINVAL; /* can't change other clients */ |
1832 | ||
04a56dd8 | 1833 | if (info->output_pool >= 1 && info->output_pool <= SNDRV_SEQ_MAX_EVENTS && |
1da177e4 | 1834 | (! snd_seq_write_pool_allocated(client) || |
04a56dd8 | 1835 | info->output_pool != client->pool->size)) { |
1da177e4 LT |
1836 | if (snd_seq_write_pool_allocated(client)) { |
1837 | /* remove all existing cells */ | |
c520ff3d | 1838 | snd_seq_pool_mark_closing(client->pool); |
1da177e4 LT |
1839 | snd_seq_queue_client_leave_cells(client->number); |
1840 | snd_seq_pool_done(client->pool); | |
1841 | } | |
04a56dd8 | 1842 | client->pool->size = info->output_pool; |
1da177e4 LT |
1843 | rc = snd_seq_pool_init(client->pool); |
1844 | if (rc < 0) | |
1845 | return rc; | |
1846 | } | |
1847 | if (client->type == USER_CLIENT && client->data.user.fifo != NULL && | |
04a56dd8 TS |
1848 | info->input_pool >= 1 && |
1849 | info->input_pool <= SNDRV_SEQ_MAX_CLIENT_EVENTS && | |
1850 | info->input_pool != client->data.user.fifo_pool_size) { | |
1da177e4 | 1851 | /* change pool size */ |
04a56dd8 | 1852 | rc = snd_seq_fifo_resize(client->data.user.fifo, info->input_pool); |
1da177e4 LT |
1853 | if (rc < 0) |
1854 | return rc; | |
04a56dd8 | 1855 | client->data.user.fifo_pool_size = info->input_pool; |
1da177e4 | 1856 | } |
04a56dd8 TS |
1857 | if (info->output_room >= 1 && |
1858 | info->output_room <= client->pool->size) { | |
1859 | client->pool->room = info->output_room; | |
1da177e4 LT |
1860 | } |
1861 | ||
1862 | return snd_seq_ioctl_get_client_pool(client, arg); | |
1863 | } | |
1864 | ||
1865 | ||
1866 | /* REMOVE_EVENTS ioctl() */ | |
c7e0b5bf | 1867 | static int snd_seq_ioctl_remove_events(struct snd_seq_client *client, |
04a56dd8 | 1868 | void *arg) |
1da177e4 | 1869 | { |
04a56dd8 | 1870 | struct snd_seq_remove_events *info = arg; |
1da177e4 LT |
1871 | |
1872 | /* | |
1873 | * Input mostly not implemented XXX. | |
1874 | */ | |
04a56dd8 | 1875 | if (info->remove_mode & SNDRV_SEQ_REMOVE_INPUT) { |
1da177e4 LT |
1876 | /* |
1877 | * No restrictions so for a user client we can clear | |
1878 | * the whole fifo | |
1879 | */ | |
030e2c78 | 1880 | if (client->type == USER_CLIENT && client->data.user.fifo) |
1da177e4 LT |
1881 | snd_seq_fifo_clear(client->data.user.fifo); |
1882 | } | |
1883 | ||
04a56dd8 TS |
1884 | if (info->remove_mode & SNDRV_SEQ_REMOVE_OUTPUT) |
1885 | snd_seq_queue_remove_cells(client->number, info); | |
1da177e4 LT |
1886 | |
1887 | return 0; | |
1888 | } | |
1889 | ||
1890 | ||
1891 | /* | |
1892 | * get subscription info | |
1893 | */ | |
c7e0b5bf | 1894 | static int snd_seq_ioctl_get_subscription(struct snd_seq_client *client, |
04a56dd8 | 1895 | void *arg) |
1da177e4 | 1896 | { |
04a56dd8 | 1897 | struct snd_seq_port_subscribe *subs = arg; |
1da177e4 | 1898 | int result; |
c7e0b5bf TI |
1899 | struct snd_seq_client *sender = NULL; |
1900 | struct snd_seq_client_port *sport = NULL; | |
c7e0b5bf | 1901 | struct snd_seq_subscribers *p; |
1da177e4 | 1902 | |
1da177e4 | 1903 | result = -EINVAL; |
04a56dd8 | 1904 | if ((sender = snd_seq_client_use_ptr(subs->sender.client)) == NULL) |
1da177e4 | 1905 | goto __end; |
04a56dd8 | 1906 | if ((sport = snd_seq_port_use_ptr(sender, subs->sender.port)) == NULL) |
1da177e4 | 1907 | goto __end; |
04a56dd8 | 1908 | p = snd_seq_port_get_subscription(&sport->c_src, &subs->dest); |
1da177e4 LT |
1909 | if (p) { |
1910 | result = 0; | |
04a56dd8 | 1911 | *subs = p->info; |
1da177e4 LT |
1912 | } else |
1913 | result = -ENOENT; | |
1914 | ||
1915 | __end: | |
1916 | if (sport) | |
1917 | snd_seq_port_unlock(sport); | |
1918 | if (sender) | |
1919 | snd_seq_client_unlock(sender); | |
04a56dd8 | 1920 | |
1da177e4 LT |
1921 | return result; |
1922 | } | |
1923 | ||
1924 | ||
1925 | /* | |
1926 | * get subscription info - check only its presence | |
1927 | */ | |
04a56dd8 | 1928 | static int snd_seq_ioctl_query_subs(struct snd_seq_client *client, void *arg) |
1da177e4 | 1929 | { |
04a56dd8 | 1930 | struct snd_seq_query_subs *subs = arg; |
1da177e4 | 1931 | int result = -ENXIO; |
c7e0b5bf TI |
1932 | struct snd_seq_client *cptr = NULL; |
1933 | struct snd_seq_client_port *port = NULL; | |
c7e0b5bf | 1934 | struct snd_seq_port_subs_info *group; |
1da177e4 LT |
1935 | struct list_head *p; |
1936 | int i; | |
1937 | ||
04a56dd8 | 1938 | if ((cptr = snd_seq_client_use_ptr(subs->root.client)) == NULL) |
1da177e4 | 1939 | goto __end; |
04a56dd8 | 1940 | if ((port = snd_seq_port_use_ptr(cptr, subs->root.port)) == NULL) |
1da177e4 LT |
1941 | goto __end; |
1942 | ||
04a56dd8 | 1943 | switch (subs->type) { |
1da177e4 LT |
1944 | case SNDRV_SEQ_QUERY_SUBS_READ: |
1945 | group = &port->c_src; | |
1946 | break; | |
1947 | case SNDRV_SEQ_QUERY_SUBS_WRITE: | |
1948 | group = &port->c_dest; | |
1949 | break; | |
1950 | default: | |
1951 | goto __end; | |
1952 | } | |
1953 | ||
1954 | down_read(&group->list_mutex); | |
1955 | /* search for the subscriber */ | |
04a56dd8 | 1956 | subs->num_subs = group->count; |
1da177e4 LT |
1957 | i = 0; |
1958 | result = -ENOENT; | |
1959 | list_for_each(p, &group->list_head) { | |
04a56dd8 | 1960 | if (i++ == subs->index) { |
1da177e4 | 1961 | /* found! */ |
c7e0b5bf | 1962 | struct snd_seq_subscribers *s; |
04a56dd8 | 1963 | if (subs->type == SNDRV_SEQ_QUERY_SUBS_READ) { |
c7e0b5bf | 1964 | s = list_entry(p, struct snd_seq_subscribers, src_list); |
04a56dd8 | 1965 | subs->addr = s->info.dest; |
1da177e4 | 1966 | } else { |
c7e0b5bf | 1967 | s = list_entry(p, struct snd_seq_subscribers, dest_list); |
04a56dd8 | 1968 | subs->addr = s->info.sender; |
1da177e4 | 1969 | } |
04a56dd8 TS |
1970 | subs->flags = s->info.flags; |
1971 | subs->queue = s->info.queue; | |
1da177e4 LT |
1972 | result = 0; |
1973 | break; | |
1974 | } | |
1975 | } | |
1976 | up_read(&group->list_mutex); | |
1977 | ||
1978 | __end: | |
1979 | if (port) | |
1980 | snd_seq_port_unlock(port); | |
1981 | if (cptr) | |
1982 | snd_seq_client_unlock(cptr); | |
04a56dd8 | 1983 | |
1da177e4 LT |
1984 | return result; |
1985 | } | |
1986 | ||
1987 | ||
1988 | /* | |
1989 | * query next client | |
1990 | */ | |
c7e0b5bf | 1991 | static int snd_seq_ioctl_query_next_client(struct snd_seq_client *client, |
04a56dd8 | 1992 | void *arg) |
1da177e4 | 1993 | { |
04a56dd8 | 1994 | struct snd_seq_client_info *info = arg; |
c7e0b5bf | 1995 | struct snd_seq_client *cptr = NULL; |
1da177e4 LT |
1996 | |
1997 | /* search for next client */ | |
04a56dd8 TS |
1998 | info->client++; |
1999 | if (info->client < 0) | |
2000 | info->client = 0; | |
2001 | for (; info->client < SNDRV_SEQ_MAX_CLIENTS; info->client++) { | |
2002 | cptr = snd_seq_client_use_ptr(info->client); | |
1da177e4 LT |
2003 | if (cptr) |
2004 | break; /* found */ | |
2005 | } | |
2006 | if (cptr == NULL) | |
2007 | return -ENOENT; | |
2008 | ||
04a56dd8 | 2009 | get_client_info(cptr, info); |
1da177e4 LT |
2010 | snd_seq_client_unlock(cptr); |
2011 | ||
1da177e4 LT |
2012 | return 0; |
2013 | } | |
2014 | ||
2015 | /* | |
2016 | * query next port | |
2017 | */ | |
c7e0b5bf | 2018 | static int snd_seq_ioctl_query_next_port(struct snd_seq_client *client, |
04a56dd8 | 2019 | void *arg) |
1da177e4 | 2020 | { |
04a56dd8 | 2021 | struct snd_seq_port_info *info = arg; |
c7e0b5bf TI |
2022 | struct snd_seq_client *cptr; |
2023 | struct snd_seq_client_port *port = NULL; | |
1da177e4 | 2024 | |
04a56dd8 | 2025 | cptr = snd_seq_client_use_ptr(info->addr.client); |
1da177e4 LT |
2026 | if (cptr == NULL) |
2027 | return -ENXIO; | |
2028 | ||
2029 | /* search for next port */ | |
04a56dd8 TS |
2030 | info->addr.port++; |
2031 | port = snd_seq_port_query_nearest(cptr, info); | |
1da177e4 LT |
2032 | if (port == NULL) { |
2033 | snd_seq_client_unlock(cptr); | |
2034 | return -ENOENT; | |
2035 | } | |
2036 | ||
2037 | /* get port info */ | |
04a56dd8 TS |
2038 | info->addr = port->addr; |
2039 | snd_seq_get_port_info(port, info); | |
1da177e4 LT |
2040 | snd_seq_port_unlock(port); |
2041 | snd_seq_client_unlock(cptr); | |
2042 | ||
1da177e4 LT |
2043 | return 0; |
2044 | } | |
2045 | ||
2046 | /* -------------------------------------------------------- */ | |
2047 | ||
8ce8eb60 TS |
2048 | static const struct ioctl_handler { |
2049 | unsigned int cmd; | |
2050 | int (*func)(struct snd_seq_client *client, void *arg); | |
2051 | } ioctl_handlers[] = { | |
04a56dd8 TS |
2052 | { SNDRV_SEQ_IOCTL_PVERSION, snd_seq_ioctl_pversion }, |
2053 | { SNDRV_SEQ_IOCTL_CLIENT_ID, snd_seq_ioctl_client_id }, | |
1da177e4 LT |
2054 | { SNDRV_SEQ_IOCTL_SYSTEM_INFO, snd_seq_ioctl_system_info }, |
2055 | { SNDRV_SEQ_IOCTL_RUNNING_MODE, snd_seq_ioctl_running_mode }, | |
2056 | { SNDRV_SEQ_IOCTL_GET_CLIENT_INFO, snd_seq_ioctl_get_client_info }, | |
2057 | { SNDRV_SEQ_IOCTL_SET_CLIENT_INFO, snd_seq_ioctl_set_client_info }, | |
2058 | { SNDRV_SEQ_IOCTL_CREATE_PORT, snd_seq_ioctl_create_port }, | |
2059 | { SNDRV_SEQ_IOCTL_DELETE_PORT, snd_seq_ioctl_delete_port }, | |
2060 | { SNDRV_SEQ_IOCTL_GET_PORT_INFO, snd_seq_ioctl_get_port_info }, | |
2061 | { SNDRV_SEQ_IOCTL_SET_PORT_INFO, snd_seq_ioctl_set_port_info }, | |
2062 | { SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT, snd_seq_ioctl_subscribe_port }, | |
2063 | { SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT, snd_seq_ioctl_unsubscribe_port }, | |
2064 | { SNDRV_SEQ_IOCTL_CREATE_QUEUE, snd_seq_ioctl_create_queue }, | |
2065 | { SNDRV_SEQ_IOCTL_DELETE_QUEUE, snd_seq_ioctl_delete_queue }, | |
2066 | { SNDRV_SEQ_IOCTL_GET_QUEUE_INFO, snd_seq_ioctl_get_queue_info }, | |
2067 | { SNDRV_SEQ_IOCTL_SET_QUEUE_INFO, snd_seq_ioctl_set_queue_info }, | |
2068 | { SNDRV_SEQ_IOCTL_GET_NAMED_QUEUE, snd_seq_ioctl_get_named_queue }, | |
2069 | { SNDRV_SEQ_IOCTL_GET_QUEUE_STATUS, snd_seq_ioctl_get_queue_status }, | |
2070 | { SNDRV_SEQ_IOCTL_GET_QUEUE_TEMPO, snd_seq_ioctl_get_queue_tempo }, | |
2071 | { SNDRV_SEQ_IOCTL_SET_QUEUE_TEMPO, snd_seq_ioctl_set_queue_tempo }, | |
2072 | { SNDRV_SEQ_IOCTL_GET_QUEUE_TIMER, snd_seq_ioctl_get_queue_timer }, | |
2073 | { SNDRV_SEQ_IOCTL_SET_QUEUE_TIMER, snd_seq_ioctl_set_queue_timer }, | |
2074 | { SNDRV_SEQ_IOCTL_GET_QUEUE_CLIENT, snd_seq_ioctl_get_queue_client }, | |
2075 | { SNDRV_SEQ_IOCTL_SET_QUEUE_CLIENT, snd_seq_ioctl_set_queue_client }, | |
2076 | { SNDRV_SEQ_IOCTL_GET_CLIENT_POOL, snd_seq_ioctl_get_client_pool }, | |
2077 | { SNDRV_SEQ_IOCTL_SET_CLIENT_POOL, snd_seq_ioctl_set_client_pool }, | |
2078 | { SNDRV_SEQ_IOCTL_GET_SUBSCRIPTION, snd_seq_ioctl_get_subscription }, | |
2079 | { SNDRV_SEQ_IOCTL_QUERY_NEXT_CLIENT, snd_seq_ioctl_query_next_client }, | |
2080 | { SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT, snd_seq_ioctl_query_next_port }, | |
2081 | { SNDRV_SEQ_IOCTL_REMOVE_EVENTS, snd_seq_ioctl_remove_events }, | |
2082 | { SNDRV_SEQ_IOCTL_QUERY_SUBS, snd_seq_ioctl_query_subs }, | |
2083 | { 0, NULL }, | |
2084 | }; | |
2085 | ||
e12ec251 TS |
2086 | static long snd_seq_ioctl(struct file *file, unsigned int cmd, |
2087 | unsigned long arg) | |
8ce8eb60 TS |
2088 | { |
2089 | struct snd_seq_client *client = file->private_data; | |
2090 | /* To use kernel stack for ioctl data. */ | |
4127e80a | 2091 | union { |
8ce8eb60 TS |
2092 | int pversion; |
2093 | int client_id; | |
2094 | struct snd_seq_system_info system_info; | |
2095 | struct snd_seq_running_info running_info; | |
2096 | struct snd_seq_client_info client_info; | |
2097 | struct snd_seq_port_info port_info; | |
2098 | struct snd_seq_port_subscribe port_subscribe; | |
2099 | struct snd_seq_queue_info queue_info; | |
2100 | struct snd_seq_queue_status queue_status; | |
2101 | struct snd_seq_queue_tempo tempo; | |
2102 | struct snd_seq_queue_timer queue_timer; | |
2103 | struct snd_seq_queue_client queue_client; | |
2104 | struct snd_seq_client_pool client_pool; | |
2105 | struct snd_seq_remove_events remove_events; | |
2106 | struct snd_seq_query_subs query_subs; | |
4127e80a | 2107 | } buf; |
8ce8eb60 TS |
2108 | const struct ioctl_handler *handler; |
2109 | unsigned long size; | |
2110 | int err; | |
2111 | ||
2112 | if (snd_BUG_ON(!client)) | |
2113 | return -ENXIO; | |
2114 | ||
2115 | for (handler = ioctl_handlers; handler->cmd > 0; ++handler) { | |
2116 | if (handler->cmd == cmd) | |
2117 | break; | |
2118 | } | |
2119 | if (handler->cmd == 0) | |
2120 | return -ENOTTY; | |
4127e80a TS |
2121 | |
2122 | memset(&buf, 0, sizeof(buf)); | |
2123 | ||
8ce8eb60 TS |
2124 | /* |
2125 | * All of ioctl commands for ALSA sequencer get an argument of size | |
2126 | * within 13 bits. We can safely pick up the size from the command. | |
2127 | */ | |
2128 | size = _IOC_SIZE(handler->cmd); | |
69b05825 | 2129 | if (handler->cmd & IOC_IN) { |
8ce8eb60 TS |
2130 | if (copy_from_user(&buf, (const void __user *)arg, size)) |
2131 | return -EFAULT; | |
2132 | } | |
2133 | ||
b3defb79 | 2134 | mutex_lock(&client->ioctl_mutex); |
8ce8eb60 | 2135 | err = handler->func(client, &buf); |
b3defb79 | 2136 | mutex_unlock(&client->ioctl_mutex); |
8ce8eb60 TS |
2137 | if (err >= 0) { |
2138 | /* Some commands includes a bug in 'dir' field. */ | |
2139 | if (handler->cmd == SNDRV_SEQ_IOCTL_SET_QUEUE_CLIENT || | |
2140 | handler->cmd == SNDRV_SEQ_IOCTL_SET_CLIENT_POOL || | |
69b05825 | 2141 | (handler->cmd & IOC_OUT)) |
8ce8eb60 TS |
2142 | if (copy_to_user((void __user *)arg, &buf, size)) |
2143 | return -EFAULT; | |
2144 | } | |
2145 | ||
2146 | return err; | |
2147 | } | |
2148 | ||
1da177e4 LT |
2149 | #ifdef CONFIG_COMPAT |
2150 | #include "seq_compat.c" | |
2151 | #else | |
2152 | #define snd_seq_ioctl_compat NULL | |
2153 | #endif | |
2154 | ||
2155 | /* -------------------------------------------------------- */ | |
2156 | ||
2157 | ||
2158 | /* exported to kernel modules */ | |
7b6d9245 CL |
2159 | int snd_seq_create_kernel_client(struct snd_card *card, int client_index, |
2160 | const char *name_fmt, ...) | |
1da177e4 | 2161 | { |
c7e0b5bf | 2162 | struct snd_seq_client *client; |
7b6d9245 | 2163 | va_list args; |
1da177e4 | 2164 | |
7eaa943c TI |
2165 | if (snd_BUG_ON(in_interrupt())) |
2166 | return -EBUSY; | |
1da177e4 | 2167 | |
aa1e77e6 | 2168 | if (card && client_index >= SNDRV_SEQ_CLIENTS_PER_CARD) |
1da177e4 | 2169 | return -EINVAL; |
aa1e77e6 | 2170 | if (card == NULL && client_index >= SNDRV_SEQ_GLOBAL_CLIENTS) |
1da177e4 | 2171 | return -EINVAL; |
1da177e4 | 2172 | |
1a60d4c5 | 2173 | if (mutex_lock_interruptible(®ister_mutex)) |
1da177e4 | 2174 | return -ERESTARTSYS; |
d001544d CL |
2175 | |
2176 | if (card) { | |
aa1e77e6 CL |
2177 | client_index += SNDRV_SEQ_GLOBAL_CLIENTS |
2178 | + card->number * SNDRV_SEQ_CLIENTS_PER_CARD; | |
2179 | if (client_index >= SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN) | |
d001544d CL |
2180 | client_index = -1; |
2181 | } | |
2182 | ||
1da177e4 | 2183 | /* empty write queue as default */ |
aa1e77e6 | 2184 | client = seq_create_client1(client_index, 0); |
1da177e4 | 2185 | if (client == NULL) { |
1a60d4c5 | 2186 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
2187 | return -EBUSY; /* failure code */ |
2188 | } | |
2189 | usage_alloc(&client_usage, 1); | |
2190 | ||
83e8ad69 CL |
2191 | client->accept_input = 1; |
2192 | client->accept_output = 1; | |
a1ce94d0 | 2193 | client->data.kernel.card = card; |
1da177e4 | 2194 | |
7b6d9245 CL |
2195 | va_start(args, name_fmt); |
2196 | vsnprintf(client->name, sizeof(client->name), name_fmt, args); | |
2197 | va_end(args); | |
1da177e4 LT |
2198 | |
2199 | client->type = KERNEL_CLIENT; | |
1a60d4c5 | 2200 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
2201 | |
2202 | /* make others aware this new client */ | |
2203 | snd_seq_system_client_ev_client_start(client->number); | |
2204 | ||
2205 | /* return client number to caller */ | |
2206 | return client->number; | |
2207 | } | |
91715ed9 TI |
2208 | EXPORT_SYMBOL(snd_seq_create_kernel_client); |
2209 | ||
1da177e4 LT |
2210 | /* exported to kernel modules */ |
2211 | int snd_seq_delete_kernel_client(int client) | |
2212 | { | |
c7e0b5bf | 2213 | struct snd_seq_client *ptr; |
1da177e4 | 2214 | |
7eaa943c TI |
2215 | if (snd_BUG_ON(in_interrupt())) |
2216 | return -EBUSY; | |
1da177e4 LT |
2217 | |
2218 | ptr = clientptr(client); | |
2219 | if (ptr == NULL) | |
2220 | return -EINVAL; | |
2221 | ||
2222 | seq_free_client(ptr); | |
2223 | kfree(ptr); | |
2224 | return 0; | |
2225 | } | |
91715ed9 | 2226 | EXPORT_SYMBOL(snd_seq_delete_kernel_client); |
1da177e4 LT |
2227 | |
2228 | /* skeleton to enqueue event, called from snd_seq_kernel_client_enqueue | |
2229 | * and snd_seq_kernel_client_enqueue_blocking | |
2230 | */ | |
c7e0b5bf | 2231 | static int kernel_client_enqueue(int client, struct snd_seq_event *ev, |
1da177e4 LT |
2232 | struct file *file, int blocking, |
2233 | int atomic, int hop) | |
2234 | { | |
c7e0b5bf | 2235 | struct snd_seq_client *cptr; |
1da177e4 LT |
2236 | int result; |
2237 | ||
7eaa943c TI |
2238 | if (snd_BUG_ON(!ev)) |
2239 | return -EINVAL; | |
1da177e4 LT |
2240 | |
2241 | if (ev->type == SNDRV_SEQ_EVENT_NONE) | |
2242 | return 0; /* ignore this */ | |
2243 | if (ev->type == SNDRV_SEQ_EVENT_KERNEL_ERROR) | |
2244 | return -EINVAL; /* quoted events can't be enqueued */ | |
2245 | ||
2246 | /* fill in client number */ | |
2247 | ev->source.client = client; | |
2248 | ||
2249 | if (check_event_type_and_length(ev)) | |
2250 | return -EINVAL; | |
2251 | ||
2252 | cptr = snd_seq_client_use_ptr(client); | |
2253 | if (cptr == NULL) | |
2254 | return -EINVAL; | |
2255 | ||
2256 | if (! cptr->accept_output) | |
2257 | result = -EPERM; | |
2258 | else /* send it */ | |
2259 | result = snd_seq_client_enqueue_event(cptr, ev, file, blocking, atomic, hop); | |
2260 | ||
2261 | snd_seq_client_unlock(cptr); | |
2262 | return result; | |
2263 | } | |
2264 | ||
2265 | /* | |
2266 | * exported, called by kernel clients to enqueue events (w/o blocking) | |
2267 | * | |
2268 | * RETURN VALUE: zero if succeed, negative if error | |
2269 | */ | |
c7e0b5bf | 2270 | int snd_seq_kernel_client_enqueue(int client, struct snd_seq_event * ev, |
1da177e4 LT |
2271 | int atomic, int hop) |
2272 | { | |
2273 | return kernel_client_enqueue(client, ev, NULL, 0, atomic, hop); | |
2274 | } | |
91715ed9 TI |
2275 | EXPORT_SYMBOL(snd_seq_kernel_client_enqueue); |
2276 | ||
1da177e4 LT |
2277 | /* |
2278 | * exported, called by kernel clients to enqueue events (with blocking) | |
2279 | * | |
2280 | * RETURN VALUE: zero if succeed, negative if error | |
2281 | */ | |
c7e0b5bf | 2282 | int snd_seq_kernel_client_enqueue_blocking(int client, struct snd_seq_event * ev, |
1da177e4 LT |
2283 | struct file *file, |
2284 | int atomic, int hop) | |
2285 | { | |
2286 | return kernel_client_enqueue(client, ev, file, 1, atomic, hop); | |
2287 | } | |
91715ed9 | 2288 | EXPORT_SYMBOL(snd_seq_kernel_client_enqueue_blocking); |
1da177e4 LT |
2289 | |
2290 | /* | |
2291 | * exported, called by kernel clients to dispatch events directly to other | |
2292 | * clients, bypassing the queues. Event time-stamp will be updated. | |
2293 | * | |
2294 | * RETURN VALUE: negative = delivery failed, | |
2295 | * zero, or positive: the number of delivered events | |
2296 | */ | |
c7e0b5bf | 2297 | int snd_seq_kernel_client_dispatch(int client, struct snd_seq_event * ev, |
1da177e4 LT |
2298 | int atomic, int hop) |
2299 | { | |
c7e0b5bf | 2300 | struct snd_seq_client *cptr; |
1da177e4 LT |
2301 | int result; |
2302 | ||
7eaa943c TI |
2303 | if (snd_BUG_ON(!ev)) |
2304 | return -EINVAL; | |
1da177e4 LT |
2305 | |
2306 | /* fill in client number */ | |
2307 | ev->queue = SNDRV_SEQ_QUEUE_DIRECT; | |
2308 | ev->source.client = client; | |
2309 | ||
2310 | if (check_event_type_and_length(ev)) | |
2311 | return -EINVAL; | |
2312 | ||
2313 | cptr = snd_seq_client_use_ptr(client); | |
2314 | if (cptr == NULL) | |
2315 | return -EINVAL; | |
2316 | ||
2317 | if (!cptr->accept_output) | |
2318 | result = -EPERM; | |
2319 | else | |
2320 | result = snd_seq_deliver_event(cptr, ev, atomic, hop); | |
2321 | ||
2322 | snd_seq_client_unlock(cptr); | |
2323 | return result; | |
2324 | } | |
91715ed9 | 2325 | EXPORT_SYMBOL(snd_seq_kernel_client_dispatch); |
1da177e4 | 2326 | |
77dfa8d3 TS |
2327 | /** |
2328 | * snd_seq_kernel_client_ctl - operate a command for a client with data in | |
2329 | * kernel space. | |
2330 | * @clientid: A numerical ID for a client. | |
2331 | * @cmd: An ioctl(2) command for ALSA sequencer operation. | |
2332 | * @arg: A pointer to data in kernel space. | |
2333 | * | |
2334 | * Against its name, both kernel/application client can be handled by this | |
2335 | * kernel API. A pointer of 'arg' argument should be in kernel space. | |
2336 | * | |
2337 | * Return: 0 at success. Negative error code at failure. | |
1da177e4 LT |
2338 | */ |
2339 | int snd_seq_kernel_client_ctl(int clientid, unsigned int cmd, void *arg) | |
2340 | { | |
8ce8eb60 | 2341 | const struct ioctl_handler *handler; |
c7e0b5bf | 2342 | struct snd_seq_client *client; |
1da177e4 LT |
2343 | |
2344 | client = clientptr(clientid); | |
2345 | if (client == NULL) | |
2346 | return -ENXIO; | |
8ce8eb60 TS |
2347 | |
2348 | for (handler = ioctl_handlers; handler->cmd > 0; ++handler) { | |
2349 | if (handler->cmd == cmd) | |
2350 | return handler->func(client, arg); | |
2351 | } | |
2352 | ||
e12ec251 TS |
2353 | pr_debug("ALSA: seq unknown ioctl() 0x%x (type='%c', number=0x%02x)\n", |
2354 | cmd, _IOC_TYPE(cmd), _IOC_NR(cmd)); | |
2355 | return -ENOTTY; | |
1da177e4 | 2356 | } |
91715ed9 | 2357 | EXPORT_SYMBOL(snd_seq_kernel_client_ctl); |
1da177e4 LT |
2358 | |
2359 | /* exported (for OSS emulator) */ | |
2360 | int snd_seq_kernel_client_write_poll(int clientid, struct file *file, poll_table *wait) | |
2361 | { | |
c7e0b5bf | 2362 | struct snd_seq_client *client; |
1da177e4 LT |
2363 | |
2364 | client = clientptr(clientid); | |
2365 | if (client == NULL) | |
2366 | return -ENXIO; | |
2367 | ||
2368 | if (! snd_seq_write_pool_allocated(client)) | |
2369 | return 1; | |
2370 | if (snd_seq_pool_poll_wait(client->pool, file, wait)) | |
2371 | return 1; | |
2372 | return 0; | |
2373 | } | |
91715ed9 TI |
2374 | EXPORT_SYMBOL(snd_seq_kernel_client_write_poll); |
2375 | ||
1da177e4 LT |
2376 | /*---------------------------------------------------------------------------*/ |
2377 | ||
cd6a6503 | 2378 | #ifdef CONFIG_SND_PROC_FS |
1da177e4 LT |
2379 | /* |
2380 | * /proc interface | |
2381 | */ | |
c7e0b5bf TI |
2382 | static void snd_seq_info_dump_subscribers(struct snd_info_buffer *buffer, |
2383 | struct snd_seq_port_subs_info *group, | |
2384 | int is_src, char *msg) | |
1da177e4 LT |
2385 | { |
2386 | struct list_head *p; | |
c7e0b5bf | 2387 | struct snd_seq_subscribers *s; |
1da177e4 LT |
2388 | int count = 0; |
2389 | ||
2390 | down_read(&group->list_mutex); | |
2391 | if (list_empty(&group->list_head)) { | |
2392 | up_read(&group->list_mutex); | |
2393 | return; | |
2394 | } | |
2395 | snd_iprintf(buffer, msg); | |
2396 | list_for_each(p, &group->list_head) { | |
2397 | if (is_src) | |
c7e0b5bf | 2398 | s = list_entry(p, struct snd_seq_subscribers, src_list); |
1da177e4 | 2399 | else |
c7e0b5bf | 2400 | s = list_entry(p, struct snd_seq_subscribers, dest_list); |
1da177e4 LT |
2401 | if (count++) |
2402 | snd_iprintf(buffer, ", "); | |
2403 | snd_iprintf(buffer, "%d:%d", | |
2404 | is_src ? s->info.dest.client : s->info.sender.client, | |
2405 | is_src ? s->info.dest.port : s->info.sender.port); | |
2406 | if (s->info.flags & SNDRV_SEQ_PORT_SUBS_TIMESTAMP) | |
2407 | snd_iprintf(buffer, "[%c:%d]", ((s->info.flags & SNDRV_SEQ_PORT_SUBS_TIME_REAL) ? 'r' : 't'), s->info.queue); | |
2408 | if (group->exclusive) | |
2409 | snd_iprintf(buffer, "[ex]"); | |
2410 | } | |
2411 | up_read(&group->list_mutex); | |
2412 | snd_iprintf(buffer, "\n"); | |
2413 | } | |
2414 | ||
2415 | #define FLAG_PERM_RD(perm) ((perm) & SNDRV_SEQ_PORT_CAP_READ ? ((perm) & SNDRV_SEQ_PORT_CAP_SUBS_READ ? 'R' : 'r') : '-') | |
2416 | #define FLAG_PERM_WR(perm) ((perm) & SNDRV_SEQ_PORT_CAP_WRITE ? ((perm) & SNDRV_SEQ_PORT_CAP_SUBS_WRITE ? 'W' : 'w') : '-') | |
2417 | #define FLAG_PERM_EX(perm) ((perm) & SNDRV_SEQ_PORT_CAP_NO_EXPORT ? '-' : 'e') | |
2418 | ||
2419 | #define FLAG_PERM_DUPLEX(perm) ((perm) & SNDRV_SEQ_PORT_CAP_DUPLEX ? 'X' : '-') | |
2420 | ||
c7e0b5bf TI |
2421 | static void snd_seq_info_dump_ports(struct snd_info_buffer *buffer, |
2422 | struct snd_seq_client *client) | |
1da177e4 | 2423 | { |
9244b2c3 | 2424 | struct snd_seq_client_port *p; |
1da177e4 | 2425 | |
1a60d4c5 | 2426 | mutex_lock(&client->ports_mutex); |
9244b2c3 | 2427 | list_for_each_entry(p, &client->ports_list_head, list) { |
1da177e4 LT |
2428 | snd_iprintf(buffer, " Port %3d : \"%s\" (%c%c%c%c)\n", |
2429 | p->addr.port, p->name, | |
2430 | FLAG_PERM_RD(p->capability), | |
2431 | FLAG_PERM_WR(p->capability), | |
2432 | FLAG_PERM_EX(p->capability), | |
2433 | FLAG_PERM_DUPLEX(p->capability)); | |
2434 | snd_seq_info_dump_subscribers(buffer, &p->c_src, 1, " Connecting To: "); | |
2435 | snd_seq_info_dump_subscribers(buffer, &p->c_dest, 0, " Connected From: "); | |
2436 | } | |
1a60d4c5 | 2437 | mutex_unlock(&client->ports_mutex); |
1da177e4 LT |
2438 | } |
2439 | ||
2440 | ||
2441 | /* exported to seq_info.c */ | |
c7e0b5bf TI |
2442 | void snd_seq_info_clients_read(struct snd_info_entry *entry, |
2443 | struct snd_info_buffer *buffer) | |
1da177e4 | 2444 | { |
1da177e4 | 2445 | int c; |
c7e0b5bf | 2446 | struct snd_seq_client *client; |
1da177e4 LT |
2447 | |
2448 | snd_iprintf(buffer, "Client info\n"); | |
2449 | snd_iprintf(buffer, " cur clients : %d\n", client_usage.cur); | |
2450 | snd_iprintf(buffer, " peak clients : %d\n", client_usage.peak); | |
2451 | snd_iprintf(buffer, " max clients : %d\n", SNDRV_SEQ_MAX_CLIENTS); | |
2452 | snd_iprintf(buffer, "\n"); | |
2453 | ||
2454 | /* list the client table */ | |
2455 | for (c = 0; c < SNDRV_SEQ_MAX_CLIENTS; c++) { | |
2456 | client = snd_seq_client_use_ptr(c); | |
2457 | if (client == NULL) | |
2458 | continue; | |
2459 | if (client->type == NO_CLIENT) { | |
2460 | snd_seq_client_unlock(client); | |
2461 | continue; | |
2462 | } | |
2463 | ||
2464 | snd_iprintf(buffer, "Client %3d : \"%s\" [%s]\n", | |
2465 | c, client->name, | |
2466 | client->type == USER_CLIENT ? "User" : "Kernel"); | |
2467 | snd_seq_info_dump_ports(buffer, client); | |
2468 | if (snd_seq_write_pool_allocated(client)) { | |
2469 | snd_iprintf(buffer, " Output pool :\n"); | |
2470 | snd_seq_info_pool(buffer, client->pool, " "); | |
2471 | } | |
2472 | if (client->type == USER_CLIENT && client->data.user.fifo && | |
2473 | client->data.user.fifo->pool) { | |
2474 | snd_iprintf(buffer, " Input pool :\n"); | |
2475 | snd_seq_info_pool(buffer, client->data.user.fifo->pool, " "); | |
2476 | } | |
2477 | snd_seq_client_unlock(client); | |
2478 | } | |
2479 | } | |
cd6a6503 | 2480 | #endif /* CONFIG_SND_PROC_FS */ |
1da177e4 LT |
2481 | |
2482 | /*---------------------------------------------------------------------------*/ | |
2483 | ||
2484 | ||
2485 | /* | |
2486 | * REGISTRATION PART | |
2487 | */ | |
2488 | ||
9c2e08c5 | 2489 | static const struct file_operations snd_seq_f_ops = |
1da177e4 LT |
2490 | { |
2491 | .owner = THIS_MODULE, | |
2492 | .read = snd_seq_read, | |
2493 | .write = snd_seq_write, | |
2494 | .open = snd_seq_open, | |
2495 | .release = snd_seq_release, | |
02f4865f | 2496 | .llseek = no_llseek, |
1da177e4 LT |
2497 | .poll = snd_seq_poll, |
2498 | .unlocked_ioctl = snd_seq_ioctl, | |
2499 | .compat_ioctl = snd_seq_ioctl_compat, | |
2500 | }; | |
2501 | ||
5205388d TI |
2502 | static struct device seq_dev; |
2503 | ||
1da177e4 LT |
2504 | /* |
2505 | * register sequencer device | |
2506 | */ | |
2507 | int __init snd_sequencer_device_init(void) | |
2508 | { | |
2509 | int err; | |
2510 | ||
5205388d TI |
2511 | snd_device_initialize(&seq_dev, NULL); |
2512 | dev_set_name(&seq_dev, "seq"); | |
2513 | ||
1a60d4c5 | 2514 | if (mutex_lock_interruptible(®ister_mutex)) |
1da177e4 LT |
2515 | return -ERESTARTSYS; |
2516 | ||
40a4b263 TI |
2517 | err = snd_register_device(SNDRV_DEVICE_TYPE_SEQUENCER, NULL, 0, |
2518 | &snd_seq_f_ops, NULL, &seq_dev); | |
5205388d | 2519 | if (err < 0) { |
1a60d4c5 | 2520 | mutex_unlock(®ister_mutex); |
5205388d | 2521 | put_device(&seq_dev); |
1da177e4 LT |
2522 | return err; |
2523 | } | |
2524 | ||
1a60d4c5 | 2525 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
2526 | |
2527 | return 0; | |
2528 | } | |
2529 | ||
2530 | ||
2531 | ||
2532 | /* | |
2533 | * unregister sequencer device | |
2534 | */ | |
2535 | void __exit snd_sequencer_device_done(void) | |
2536 | { | |
40a4b263 | 2537 | snd_unregister_device(&seq_dev); |
5205388d | 2538 | put_device(&seq_dev); |
1da177e4 | 2539 | } |