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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 | spin_lock_irqsave(&clients_lock, flags); |
259 | clienttablock[client->number] = 1; | |
260 | clienttab[client->number] = NULL; | |
261 | spin_unlock_irqrestore(&clients_lock, flags); | |
f4c3bcb3 TI |
262 | snd_seq_delete_all_ports(client); |
263 | snd_seq_queue_client_leave(client->number); | |
1da177e4 LT |
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 | 912 | struct file *file, int blocking, |
9737600d TI |
913 | int atomic, int hop, |
914 | struct mutex *mutexp) | |
1da177e4 | 915 | { |
c7e0b5bf | 916 | struct snd_seq_event_cell *cell; |
1da177e4 LT |
917 | int err; |
918 | ||
919 | /* special queue values - force direct passing */ | |
920 | if (event->queue == SNDRV_SEQ_ADDRESS_SUBSCRIBERS) { | |
921 | event->dest.client = SNDRV_SEQ_ADDRESS_SUBSCRIBERS; | |
922 | event->queue = SNDRV_SEQ_QUEUE_DIRECT; | |
923 | } else | |
924 | #ifdef SUPPORT_BROADCAST | |
925 | if (event->queue == SNDRV_SEQ_ADDRESS_BROADCAST) { | |
926 | event->dest.client = SNDRV_SEQ_ADDRESS_BROADCAST; | |
927 | event->queue = SNDRV_SEQ_QUEUE_DIRECT; | |
928 | } | |
929 | #endif | |
930 | if (event->dest.client == SNDRV_SEQ_ADDRESS_SUBSCRIBERS) { | |
931 | /* check presence of source port */ | |
c7e0b5bf | 932 | struct snd_seq_client_port *src_port = snd_seq_port_use_ptr(client, event->source.port); |
1da177e4 LT |
933 | if (src_port == NULL) |
934 | return -EINVAL; | |
935 | snd_seq_port_unlock(src_port); | |
936 | } | |
937 | ||
938 | /* direct event processing without enqueued */ | |
939 | if (snd_seq_ev_is_direct(event)) { | |
940 | if (event->type == SNDRV_SEQ_EVENT_NOTE) | |
941 | return -EINVAL; /* this event must be enqueued! */ | |
942 | return snd_seq_deliver_event(client, event, atomic, hop); | |
943 | } | |
944 | ||
945 | /* Not direct, normal queuing */ | |
946 | if (snd_seq_queue_is_used(event->queue, client->number) <= 0) | |
947 | return -EINVAL; /* invalid queue */ | |
948 | if (! snd_seq_write_pool_allocated(client)) | |
949 | return -ENXIO; /* queue is not allocated */ | |
950 | ||
951 | /* allocate an event cell */ | |
9737600d TI |
952 | err = snd_seq_event_dup(client->pool, event, &cell, !blocking || atomic, |
953 | file, mutexp); | |
1da177e4 LT |
954 | if (err < 0) |
955 | return err; | |
956 | ||
957 | /* we got a cell. enqueue it. */ | |
958 | if ((err = snd_seq_enqueue_event(cell, atomic, hop)) < 0) { | |
959 | snd_seq_cell_free(cell); | |
960 | return err; | |
961 | } | |
962 | ||
963 | return 0; | |
964 | } | |
965 | ||
966 | ||
967 | /* | |
968 | * check validity of event type and data length. | |
969 | * return non-zero if invalid. | |
970 | */ | |
c7e0b5bf | 971 | static int check_event_type_and_length(struct snd_seq_event *ev) |
1da177e4 LT |
972 | { |
973 | switch (snd_seq_ev_length_type(ev)) { | |
974 | case SNDRV_SEQ_EVENT_LENGTH_FIXED: | |
975 | if (snd_seq_ev_is_variable_type(ev)) | |
976 | return -EINVAL; | |
977 | break; | |
978 | case SNDRV_SEQ_EVENT_LENGTH_VARIABLE: | |
979 | if (! snd_seq_ev_is_variable_type(ev) || | |
980 | (ev->data.ext.len & ~SNDRV_SEQ_EXT_MASK) >= SNDRV_SEQ_MAX_EVENT_LEN) | |
981 | return -EINVAL; | |
982 | break; | |
983 | case SNDRV_SEQ_EVENT_LENGTH_VARUSR: | |
e5723b41 | 984 | if (! snd_seq_ev_is_direct(ev)) |
1da177e4 LT |
985 | return -EINVAL; |
986 | break; | |
987 | } | |
988 | return 0; | |
989 | } | |
990 | ||
991 | ||
992 | /* handle write() */ | |
993 | /* possible error values: | |
994 | * -ENXIO invalid client or file open mode | |
995 | * -ENOMEM malloc failed | |
996 | * -EFAULT seg. fault during copy from user space | |
997 | * -EINVAL invalid event | |
998 | * -EAGAIN no space in output pool | |
999 | * -EINTR interrupts while sleep | |
1000 | * -EMLINK too many hops | |
1001 | * others depends on return value from driver callback | |
1002 | */ | |
c7e0b5bf TI |
1003 | static ssize_t snd_seq_write(struct file *file, const char __user *buf, |
1004 | size_t count, loff_t *offset) | |
1da177e4 | 1005 | { |
c7e0b5bf | 1006 | struct snd_seq_client *client = file->private_data; |
1da177e4 | 1007 | int written = 0, len; |
519b6b8a | 1008 | int err; |
c7e0b5bf | 1009 | struct snd_seq_event event; |
1da177e4 LT |
1010 | |
1011 | if (!(snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_OUTPUT)) | |
1012 | return -ENXIO; | |
1013 | ||
1014 | /* check client structures are in place */ | |
7eaa943c TI |
1015 | if (snd_BUG_ON(!client)) |
1016 | return -ENXIO; | |
1da177e4 LT |
1017 | |
1018 | if (!client->accept_output || client->pool == NULL) | |
1019 | return -ENXIO; | |
1020 | ||
1021 | /* allocate the pool now if the pool is not allocated yet */ | |
9737600d | 1022 | mutex_lock(&client->ioctl_mutex); |
1da177e4 | 1023 | if (client->pool->size > 0 && !snd_seq_write_pool_allocated(client)) { |
519b6b8a | 1024 | err = snd_seq_pool_init(client->pool); |
519b6b8a | 1025 | if (err < 0) |
9737600d | 1026 | goto out; |
1da177e4 LT |
1027 | } |
1028 | ||
1029 | /* only process whole events */ | |
519b6b8a | 1030 | err = -EINVAL; |
c7e0b5bf | 1031 | while (count >= sizeof(struct snd_seq_event)) { |
1da177e4 LT |
1032 | /* Read in the event header from the user */ |
1033 | len = sizeof(event); | |
1034 | if (copy_from_user(&event, buf, len)) { | |
1035 | err = -EFAULT; | |
1036 | break; | |
1037 | } | |
1038 | event.source.client = client->number; /* fill in client number */ | |
1039 | /* Check for extension data length */ | |
1040 | if (check_event_type_and_length(&event)) { | |
1041 | err = -EINVAL; | |
1042 | break; | |
1043 | } | |
1044 | ||
1045 | /* check for special events */ | |
1046 | if (event.type == SNDRV_SEQ_EVENT_NONE) | |
1047 | goto __skip_event; | |
1048 | else if (snd_seq_ev_is_reserved(&event)) { | |
1049 | err = -EINVAL; | |
1050 | break; | |
1051 | } | |
1052 | ||
1053 | if (snd_seq_ev_is_variable(&event)) { | |
1054 | int extlen = event.data.ext.len & ~SNDRV_SEQ_EXT_MASK; | |
1055 | if ((size_t)(extlen + len) > count) { | |
1056 | /* back out, will get an error this time or next */ | |
1057 | err = -EINVAL; | |
1058 | break; | |
1059 | } | |
1060 | /* set user space pointer */ | |
1061 | event.data.ext.len = extlen | SNDRV_SEQ_EXT_USRPTR; | |
4d23359b | 1062 | event.data.ext.ptr = (char __force *)buf |
c7e0b5bf | 1063 | + sizeof(struct snd_seq_event); |
1da177e4 LT |
1064 | len += extlen; /* increment data length */ |
1065 | } else { | |
1066 | #ifdef CONFIG_COMPAT | |
1067 | if (client->convert32 && snd_seq_ev_is_varusr(&event)) { | |
fea952e5 | 1068 | void *ptr = (void __force *)compat_ptr(event.data.raw32.d[1]); |
1da177e4 LT |
1069 | event.data.ext.ptr = ptr; |
1070 | } | |
1071 | #endif | |
1072 | } | |
1073 | ||
1074 | /* ok, enqueue it */ | |
1075 | err = snd_seq_client_enqueue_event(client, &event, file, | |
1076 | !(file->f_flags & O_NONBLOCK), | |
9737600d | 1077 | 0, 0, &client->ioctl_mutex); |
1da177e4 LT |
1078 | if (err < 0) |
1079 | break; | |
1080 | ||
1081 | __skip_event: | |
1082 | /* Update pointers and counts */ | |
1083 | count -= len; | |
1084 | buf += len; | |
1085 | written += len; | |
1086 | } | |
1087 | ||
9737600d TI |
1088 | out: |
1089 | mutex_unlock(&client->ioctl_mutex); | |
1da177e4 LT |
1090 | return written ? written : err; |
1091 | } | |
1092 | ||
1093 | ||
1094 | /* | |
1095 | * handle polling | |
1096 | */ | |
1097 | static unsigned int snd_seq_poll(struct file *file, poll_table * wait) | |
1098 | { | |
c7e0b5bf | 1099 | struct snd_seq_client *client = file->private_data; |
1da177e4 LT |
1100 | unsigned int mask = 0; |
1101 | ||
1102 | /* check client structures are in place */ | |
7eaa943c TI |
1103 | if (snd_BUG_ON(!client)) |
1104 | return -ENXIO; | |
1da177e4 LT |
1105 | |
1106 | if ((snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_INPUT) && | |
1107 | client->data.user.fifo) { | |
1108 | ||
1109 | /* check if data is available in the outqueue */ | |
1110 | if (snd_seq_fifo_poll_wait(client->data.user.fifo, file, wait)) | |
1111 | mask |= POLLIN | POLLRDNORM; | |
1112 | } | |
1113 | ||
1114 | if (snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_OUTPUT) { | |
1115 | ||
1116 | /* check if data is available in the pool */ | |
1117 | if (!snd_seq_write_pool_allocated(client) || | |
1118 | snd_seq_pool_poll_wait(client->pool, file, wait)) | |
1119 | mask |= POLLOUT | POLLWRNORM; | |
1120 | } | |
1121 | ||
1122 | return mask; | |
1123 | } | |
1124 | ||
1125 | ||
1126 | /*-----------------------------------------------------*/ | |
1127 | ||
04a56dd8 TS |
1128 | static int snd_seq_ioctl_pversion(struct snd_seq_client *client, void *arg) |
1129 | { | |
1130 | int *pversion = arg; | |
1131 | ||
1132 | *pversion = SNDRV_SEQ_VERSION; | |
1133 | return 0; | |
1134 | } | |
1135 | ||
1136 | static int snd_seq_ioctl_client_id(struct snd_seq_client *client, void *arg) | |
1137 | { | |
1138 | int *client_id = arg; | |
1139 | ||
1140 | *client_id = client->number; | |
1141 | return 0; | |
1142 | } | |
1da177e4 LT |
1143 | |
1144 | /* SYSTEM_INFO ioctl() */ | |
04a56dd8 | 1145 | static int snd_seq_ioctl_system_info(struct snd_seq_client *client, void *arg) |
1da177e4 | 1146 | { |
04a56dd8 | 1147 | struct snd_seq_system_info *info = arg; |
1da177e4 | 1148 | |
04a56dd8 | 1149 | memset(info, 0, sizeof(*info)); |
1da177e4 | 1150 | /* fill the info fields */ |
04a56dd8 TS |
1151 | info->queues = SNDRV_SEQ_MAX_QUEUES; |
1152 | info->clients = SNDRV_SEQ_MAX_CLIENTS; | |
1153 | info->ports = SNDRV_SEQ_MAX_PORTS; | |
1154 | info->channels = 256; /* fixed limit */ | |
1155 | info->cur_clients = client_usage.cur; | |
1156 | info->cur_queues = snd_seq_queue_get_cur_queues(); | |
1157 | ||
1da177e4 LT |
1158 | return 0; |
1159 | } | |
1160 | ||
1161 | ||
1162 | /* RUNNING_MODE ioctl() */ | |
04a56dd8 | 1163 | static int snd_seq_ioctl_running_mode(struct snd_seq_client *client, void *arg) |
1da177e4 | 1164 | { |
04a56dd8 | 1165 | struct snd_seq_running_info *info = arg; |
c7e0b5bf | 1166 | struct snd_seq_client *cptr; |
1da177e4 LT |
1167 | int err = 0; |
1168 | ||
1da177e4 | 1169 | /* requested client number */ |
04a56dd8 | 1170 | cptr = snd_seq_client_use_ptr(info->client); |
1da177e4 LT |
1171 | if (cptr == NULL) |
1172 | return -ENOENT; /* don't change !!! */ | |
1173 | ||
1174 | #ifdef SNDRV_BIG_ENDIAN | |
04a56dd8 | 1175 | if (!info->big_endian) { |
1da177e4 LT |
1176 | err = -EINVAL; |
1177 | goto __err; | |
1178 | } | |
1179 | #else | |
04a56dd8 | 1180 | if (info->big_endian) { |
1da177e4 LT |
1181 | err = -EINVAL; |
1182 | goto __err; | |
1183 | } | |
1184 | ||
1185 | #endif | |
04a56dd8 | 1186 | if (info->cpu_mode > sizeof(long)) { |
1da177e4 LT |
1187 | err = -EINVAL; |
1188 | goto __err; | |
1189 | } | |
04a56dd8 | 1190 | cptr->convert32 = (info->cpu_mode < sizeof(long)); |
1da177e4 LT |
1191 | __err: |
1192 | snd_seq_client_unlock(cptr); | |
1193 | return err; | |
1194 | } | |
1195 | ||
1196 | /* CLIENT_INFO ioctl() */ | |
c7e0b5bf TI |
1197 | static void get_client_info(struct snd_seq_client *cptr, |
1198 | struct snd_seq_client_info *info) | |
1da177e4 LT |
1199 | { |
1200 | info->client = cptr->number; | |
1201 | ||
1202 | /* fill the info fields */ | |
1203 | info->type = cptr->type; | |
1204 | strcpy(info->name, cptr->name); | |
1205 | info->filter = cptr->filter; | |
1206 | info->event_lost = cptr->event_lost; | |
1207 | memcpy(info->event_filter, cptr->event_filter, 32); | |
1208 | info->num_ports = cptr->num_ports; | |
a1ce94d0 MK |
1209 | |
1210 | if (cptr->type == USER_CLIENT) | |
1211 | info->pid = pid_vnr(cptr->data.user.owner); | |
1212 | else | |
1213 | info->pid = -1; | |
1214 | ||
1215 | if (cptr->type == KERNEL_CLIENT) | |
1216 | info->card = cptr->data.kernel.card ? cptr->data.kernel.card->number : -1; | |
1217 | else | |
1218 | info->card = -1; | |
1219 | ||
1da177e4 LT |
1220 | memset(info->reserved, 0, sizeof(info->reserved)); |
1221 | } | |
1222 | ||
c7e0b5bf | 1223 | static int snd_seq_ioctl_get_client_info(struct snd_seq_client *client, |
04a56dd8 | 1224 | void *arg) |
1da177e4 | 1225 | { |
04a56dd8 | 1226 | struct snd_seq_client_info *client_info = arg; |
c7e0b5bf | 1227 | struct snd_seq_client *cptr; |
1da177e4 LT |
1228 | |
1229 | /* requested client number */ | |
04a56dd8 | 1230 | cptr = snd_seq_client_use_ptr(client_info->client); |
1da177e4 LT |
1231 | if (cptr == NULL) |
1232 | return -ENOENT; /* don't change !!! */ | |
1233 | ||
04a56dd8 | 1234 | get_client_info(cptr, client_info); |
1da177e4 LT |
1235 | snd_seq_client_unlock(cptr); |
1236 | ||
1da177e4 LT |
1237 | return 0; |
1238 | } | |
1239 | ||
1240 | ||
1241 | /* CLIENT_INFO ioctl() */ | |
c7e0b5bf | 1242 | static int snd_seq_ioctl_set_client_info(struct snd_seq_client *client, |
04a56dd8 | 1243 | void *arg) |
1da177e4 | 1244 | { |
04a56dd8 | 1245 | struct snd_seq_client_info *client_info = arg; |
1da177e4 LT |
1246 | |
1247 | /* it is not allowed to set the info fields for an another client */ | |
04a56dd8 | 1248 | if (client->number != client_info->client) |
1da177e4 LT |
1249 | return -EPERM; |
1250 | /* also client type must be set now */ | |
04a56dd8 | 1251 | if (client->type != client_info->type) |
1da177e4 LT |
1252 | return -EINVAL; |
1253 | ||
1254 | /* fill the info fields */ | |
04a56dd8 | 1255 | if (client_info->name[0]) |
ca659c7b | 1256 | strscpy(client->name, client_info->name, sizeof(client->name)); |
1da177e4 | 1257 | |
04a56dd8 TS |
1258 | client->filter = client_info->filter; |
1259 | client->event_lost = client_info->event_lost; | |
1260 | memcpy(client->event_filter, client_info->event_filter, 32); | |
1da177e4 LT |
1261 | |
1262 | return 0; | |
1263 | } | |
1264 | ||
1265 | ||
1266 | /* | |
1267 | * CREATE PORT ioctl() | |
1268 | */ | |
04a56dd8 | 1269 | static int snd_seq_ioctl_create_port(struct snd_seq_client *client, void *arg) |
1da177e4 | 1270 | { |
04a56dd8 | 1271 | struct snd_seq_port_info *info = arg; |
c7e0b5bf | 1272 | struct snd_seq_client_port *port; |
c7e0b5bf | 1273 | struct snd_seq_port_callback *callback; |
71105998 | 1274 | int port_idx; |
1da177e4 | 1275 | |
1da177e4 | 1276 | /* it is not allowed to create the port for an another client */ |
04a56dd8 | 1277 | if (info->addr.client != client->number) |
1da177e4 LT |
1278 | return -EPERM; |
1279 | ||
04a56dd8 | 1280 | port = snd_seq_create_port(client, (info->flags & SNDRV_SEQ_PORT_FLG_GIVEN_PORT) ? info->addr.port : -1); |
1da177e4 LT |
1281 | if (port == NULL) |
1282 | return -ENOMEM; | |
1283 | ||
04a56dd8 | 1284 | if (client->type == USER_CLIENT && info->kernel) { |
71105998 TI |
1285 | port_idx = port->addr.port; |
1286 | snd_seq_port_unlock(port); | |
1287 | snd_seq_delete_port(client, port_idx); | |
1da177e4 LT |
1288 | return -EINVAL; |
1289 | } | |
1290 | if (client->type == KERNEL_CLIENT) { | |
04a56dd8 | 1291 | if ((callback = info->kernel) != NULL) { |
1da177e4 LT |
1292 | if (callback->owner) |
1293 | port->owner = callback->owner; | |
1294 | port->private_data = callback->private_data; | |
1295 | port->private_free = callback->private_free; | |
1da177e4 LT |
1296 | port->event_input = callback->event_input; |
1297 | port->c_src.open = callback->subscribe; | |
1298 | port->c_src.close = callback->unsubscribe; | |
1299 | port->c_dest.open = callback->use; | |
1300 | port->c_dest.close = callback->unuse; | |
1301 | } | |
1302 | } | |
1303 | ||
04a56dd8 | 1304 | info->addr = port->addr; |
1da177e4 | 1305 | |
04a56dd8 | 1306 | snd_seq_set_port_info(port, info); |
1da177e4 | 1307 | snd_seq_system_client_ev_port_start(port->addr.client, port->addr.port); |
71105998 | 1308 | snd_seq_port_unlock(port); |
1da177e4 | 1309 | |
1da177e4 LT |
1310 | return 0; |
1311 | } | |
1312 | ||
1313 | /* | |
1314 | * DELETE PORT ioctl() | |
1315 | */ | |
04a56dd8 | 1316 | static int snd_seq_ioctl_delete_port(struct snd_seq_client *client, void *arg) |
1da177e4 | 1317 | { |
04a56dd8 | 1318 | struct snd_seq_port_info *info = arg; |
1da177e4 LT |
1319 | int err; |
1320 | ||
1da177e4 | 1321 | /* it is not allowed to remove the port for an another client */ |
04a56dd8 | 1322 | if (info->addr.client != client->number) |
1da177e4 LT |
1323 | return -EPERM; |
1324 | ||
04a56dd8 | 1325 | err = snd_seq_delete_port(client, info->addr.port); |
1da177e4 | 1326 | if (err >= 0) |
04a56dd8 | 1327 | snd_seq_system_client_ev_port_exit(client->number, info->addr.port); |
1da177e4 LT |
1328 | return err; |
1329 | } | |
1330 | ||
1331 | ||
1332 | /* | |
1333 | * GET_PORT_INFO ioctl() (on any client) | |
1334 | */ | |
04a56dd8 | 1335 | static int snd_seq_ioctl_get_port_info(struct snd_seq_client *client, void *arg) |
1da177e4 | 1336 | { |
04a56dd8 | 1337 | struct snd_seq_port_info *info = arg; |
c7e0b5bf TI |
1338 | struct snd_seq_client *cptr; |
1339 | struct snd_seq_client_port *port; | |
1da177e4 | 1340 | |
04a56dd8 | 1341 | cptr = snd_seq_client_use_ptr(info->addr.client); |
1da177e4 LT |
1342 | if (cptr == NULL) |
1343 | return -ENXIO; | |
1344 | ||
04a56dd8 | 1345 | port = snd_seq_port_use_ptr(cptr, info->addr.port); |
1da177e4 LT |
1346 | if (port == NULL) { |
1347 | snd_seq_client_unlock(cptr); | |
1348 | return -ENOENT; /* don't change */ | |
1349 | } | |
1350 | ||
1351 | /* get port info */ | |
04a56dd8 | 1352 | snd_seq_get_port_info(port, info); |
1da177e4 LT |
1353 | snd_seq_port_unlock(port); |
1354 | snd_seq_client_unlock(cptr); | |
1355 | ||
1da177e4 LT |
1356 | return 0; |
1357 | } | |
1358 | ||
1359 | ||
1360 | /* | |
1361 | * SET_PORT_INFO ioctl() (only ports on this/own client) | |
1362 | */ | |
04a56dd8 | 1363 | static int snd_seq_ioctl_set_port_info(struct snd_seq_client *client, void *arg) |
1da177e4 | 1364 | { |
04a56dd8 | 1365 | struct snd_seq_port_info *info = arg; |
c7e0b5bf | 1366 | struct snd_seq_client_port *port; |
1da177e4 | 1367 | |
04a56dd8 | 1368 | if (info->addr.client != client->number) /* only set our own ports ! */ |
1da177e4 | 1369 | return -EPERM; |
04a56dd8 | 1370 | port = snd_seq_port_use_ptr(client, info->addr.port); |
1da177e4 | 1371 | if (port) { |
04a56dd8 | 1372 | snd_seq_set_port_info(port, info); |
1da177e4 LT |
1373 | snd_seq_port_unlock(port); |
1374 | } | |
1375 | return 0; | |
1376 | } | |
1377 | ||
1378 | ||
1379 | /* | |
1380 | * port subscription (connection) | |
1381 | */ | |
1382 | #define PERM_RD (SNDRV_SEQ_PORT_CAP_READ|SNDRV_SEQ_PORT_CAP_SUBS_READ) | |
1383 | #define PERM_WR (SNDRV_SEQ_PORT_CAP_WRITE|SNDRV_SEQ_PORT_CAP_SUBS_WRITE) | |
1384 | ||
c7e0b5bf TI |
1385 | static int check_subscription_permission(struct snd_seq_client *client, |
1386 | struct snd_seq_client_port *sport, | |
1387 | struct snd_seq_client_port *dport, | |
1388 | struct snd_seq_port_subscribe *subs) | |
1da177e4 LT |
1389 | { |
1390 | if (client->number != subs->sender.client && | |
1391 | client->number != subs->dest.client) { | |
1392 | /* connection by third client - check export permission */ | |
1393 | if (check_port_perm(sport, SNDRV_SEQ_PORT_CAP_NO_EXPORT)) | |
1394 | return -EPERM; | |
1395 | if (check_port_perm(dport, SNDRV_SEQ_PORT_CAP_NO_EXPORT)) | |
1396 | return -EPERM; | |
1397 | } | |
1398 | ||
1399 | /* check read permission */ | |
1400 | /* if sender or receiver is the subscribing client itself, | |
1401 | * no permission check is necessary | |
1402 | */ | |
1403 | if (client->number != subs->sender.client) { | |
1404 | if (! check_port_perm(sport, PERM_RD)) | |
1405 | return -EPERM; | |
1406 | } | |
1407 | /* check write permission */ | |
1408 | if (client->number != subs->dest.client) { | |
1409 | if (! check_port_perm(dport, PERM_WR)) | |
1410 | return -EPERM; | |
1411 | } | |
1412 | return 0; | |
1413 | } | |
1414 | ||
1415 | /* | |
1416 | * send an subscription notify event to user client: | |
1417 | * client must be user client. | |
1418 | */ | |
1419 | int snd_seq_client_notify_subscription(int client, int port, | |
c7e0b5bf TI |
1420 | struct snd_seq_port_subscribe *info, |
1421 | int evtype) | |
1da177e4 | 1422 | { |
c7e0b5bf | 1423 | struct snd_seq_event event; |
1da177e4 LT |
1424 | |
1425 | memset(&event, 0, sizeof(event)); | |
1426 | event.type = evtype; | |
1427 | event.data.connect.dest = info->dest; | |
1428 | event.data.connect.sender = info->sender; | |
1429 | ||
1430 | return snd_seq_system_notify(client, port, &event); /* non-atomic */ | |
1431 | } | |
1432 | ||
1433 | ||
1434 | /* | |
1435 | * add to port's subscription list IOCTL interface | |
1436 | */ | |
c7e0b5bf | 1437 | static int snd_seq_ioctl_subscribe_port(struct snd_seq_client *client, |
04a56dd8 | 1438 | void *arg) |
1da177e4 | 1439 | { |
04a56dd8 | 1440 | struct snd_seq_port_subscribe *subs = arg; |
1da177e4 | 1441 | int result = -EINVAL; |
c7e0b5bf TI |
1442 | struct snd_seq_client *receiver = NULL, *sender = NULL; |
1443 | struct snd_seq_client_port *sport = NULL, *dport = NULL; | |
1da177e4 | 1444 | |
04a56dd8 | 1445 | if ((receiver = snd_seq_client_use_ptr(subs->dest.client)) == NULL) |
1da177e4 | 1446 | goto __end; |
04a56dd8 | 1447 | if ((sender = snd_seq_client_use_ptr(subs->sender.client)) == NULL) |
1da177e4 | 1448 | goto __end; |
04a56dd8 | 1449 | if ((sport = snd_seq_port_use_ptr(sender, subs->sender.port)) == NULL) |
1da177e4 | 1450 | goto __end; |
04a56dd8 | 1451 | if ((dport = snd_seq_port_use_ptr(receiver, subs->dest.port)) == NULL) |
1da177e4 LT |
1452 | goto __end; |
1453 | ||
04a56dd8 | 1454 | result = check_subscription_permission(client, sport, dport, subs); |
1da177e4 LT |
1455 | if (result < 0) |
1456 | goto __end; | |
1457 | ||
1458 | /* connect them */ | |
04a56dd8 | 1459 | result = snd_seq_port_connect(client, sender, sport, receiver, dport, subs); |
1da177e4 LT |
1460 | if (! result) /* broadcast announce */ |
1461 | snd_seq_client_notify_subscription(SNDRV_SEQ_ADDRESS_SUBSCRIBERS, 0, | |
04a56dd8 | 1462 | subs, SNDRV_SEQ_EVENT_PORT_SUBSCRIBED); |
1da177e4 LT |
1463 | __end: |
1464 | if (sport) | |
1465 | snd_seq_port_unlock(sport); | |
1466 | if (dport) | |
1467 | snd_seq_port_unlock(dport); | |
1468 | if (sender) | |
1469 | snd_seq_client_unlock(sender); | |
1470 | if (receiver) | |
1471 | snd_seq_client_unlock(receiver); | |
1472 | return result; | |
1473 | } | |
1474 | ||
1475 | ||
1476 | /* | |
1477 | * remove from port's subscription list | |
1478 | */ | |
c7e0b5bf | 1479 | static int snd_seq_ioctl_unsubscribe_port(struct snd_seq_client *client, |
04a56dd8 | 1480 | void *arg) |
1da177e4 | 1481 | { |
04a56dd8 | 1482 | struct snd_seq_port_subscribe *subs = arg; |
1da177e4 | 1483 | int result = -ENXIO; |
c7e0b5bf TI |
1484 | struct snd_seq_client *receiver = NULL, *sender = NULL; |
1485 | struct snd_seq_client_port *sport = NULL, *dport = NULL; | |
1da177e4 | 1486 | |
04a56dd8 | 1487 | if ((receiver = snd_seq_client_use_ptr(subs->dest.client)) == NULL) |
1da177e4 | 1488 | goto __end; |
04a56dd8 | 1489 | if ((sender = snd_seq_client_use_ptr(subs->sender.client)) == NULL) |
1da177e4 | 1490 | goto __end; |
04a56dd8 | 1491 | if ((sport = snd_seq_port_use_ptr(sender, subs->sender.port)) == NULL) |
1da177e4 | 1492 | goto __end; |
04a56dd8 | 1493 | if ((dport = snd_seq_port_use_ptr(receiver, subs->dest.port)) == NULL) |
1da177e4 LT |
1494 | goto __end; |
1495 | ||
04a56dd8 | 1496 | result = check_subscription_permission(client, sport, dport, subs); |
1da177e4 LT |
1497 | if (result < 0) |
1498 | goto __end; | |
1499 | ||
04a56dd8 | 1500 | result = snd_seq_port_disconnect(client, sender, sport, receiver, dport, subs); |
1da177e4 LT |
1501 | if (! result) /* broadcast announce */ |
1502 | snd_seq_client_notify_subscription(SNDRV_SEQ_ADDRESS_SUBSCRIBERS, 0, | |
04a56dd8 | 1503 | subs, SNDRV_SEQ_EVENT_PORT_UNSUBSCRIBED); |
1da177e4 LT |
1504 | __end: |
1505 | if (sport) | |
1506 | snd_seq_port_unlock(sport); | |
1507 | if (dport) | |
1508 | snd_seq_port_unlock(dport); | |
1509 | if (sender) | |
1510 | snd_seq_client_unlock(sender); | |
1511 | if (receiver) | |
1512 | snd_seq_client_unlock(receiver); | |
1513 | return result; | |
1514 | } | |
1515 | ||
1516 | ||
1517 | /* CREATE_QUEUE ioctl() */ | |
04a56dd8 | 1518 | static int snd_seq_ioctl_create_queue(struct snd_seq_client *client, void *arg) |
1da177e4 | 1519 | { |
04a56dd8 | 1520 | struct snd_seq_queue_info *info = arg; |
c7e0b5bf | 1521 | struct snd_seq_queue *q; |
1da177e4 | 1522 | |
7e1d90f6 DM |
1523 | q = snd_seq_queue_alloc(client->number, info->locked, info->flags); |
1524 | if (IS_ERR(q)) | |
1525 | return PTR_ERR(q); | |
1da177e4 | 1526 | |
04a56dd8 TS |
1527 | info->queue = q->queue; |
1528 | info->locked = q->locked; | |
1529 | info->owner = q->owner; | |
1da177e4 LT |
1530 | |
1531 | /* set queue name */ | |
04a56dd8 TS |
1532 | if (!info->name[0]) |
1533 | snprintf(info->name, sizeof(info->name), "Queue-%d", q->queue); | |
ca659c7b | 1534 | strscpy(q->name, info->name, sizeof(q->name)); |
7e1d90f6 | 1535 | snd_use_lock_free(&q->use_lock); |
1da177e4 | 1536 | |
1da177e4 LT |
1537 | return 0; |
1538 | } | |
1539 | ||
1540 | /* DELETE_QUEUE ioctl() */ | |
04a56dd8 | 1541 | static int snd_seq_ioctl_delete_queue(struct snd_seq_client *client, void *arg) |
1da177e4 | 1542 | { |
04a56dd8 | 1543 | struct snd_seq_queue_info *info = arg; |
1da177e4 | 1544 | |
04a56dd8 | 1545 | return snd_seq_queue_delete(client->number, info->queue); |
1da177e4 LT |
1546 | } |
1547 | ||
1548 | /* GET_QUEUE_INFO ioctl() */ | |
c7e0b5bf | 1549 | static int snd_seq_ioctl_get_queue_info(struct snd_seq_client *client, |
04a56dd8 | 1550 | void *arg) |
1da177e4 | 1551 | { |
04a56dd8 | 1552 | struct snd_seq_queue_info *info = arg; |
c7e0b5bf | 1553 | struct snd_seq_queue *q; |
1da177e4 | 1554 | |
04a56dd8 | 1555 | q = queueptr(info->queue); |
1da177e4 LT |
1556 | if (q == NULL) |
1557 | return -EINVAL; | |
1558 | ||
04a56dd8 TS |
1559 | memset(info, 0, sizeof(*info)); |
1560 | info->queue = q->queue; | |
1561 | info->owner = q->owner; | |
1562 | info->locked = q->locked; | |
1563 | strlcpy(info->name, q->name, sizeof(info->name)); | |
1da177e4 LT |
1564 | queuefree(q); |
1565 | ||
1da177e4 LT |
1566 | return 0; |
1567 | } | |
1568 | ||
1569 | /* SET_QUEUE_INFO ioctl() */ | |
c7e0b5bf | 1570 | static int snd_seq_ioctl_set_queue_info(struct snd_seq_client *client, |
04a56dd8 | 1571 | void *arg) |
1da177e4 | 1572 | { |
04a56dd8 | 1573 | struct snd_seq_queue_info *info = arg; |
c7e0b5bf | 1574 | struct snd_seq_queue *q; |
1da177e4 | 1575 | |
04a56dd8 | 1576 | if (info->owner != client->number) |
1da177e4 LT |
1577 | return -EINVAL; |
1578 | ||
1579 | /* change owner/locked permission */ | |
04a56dd8 TS |
1580 | if (snd_seq_queue_check_access(info->queue, client->number)) { |
1581 | if (snd_seq_queue_set_owner(info->queue, client->number, info->locked) < 0) | |
1da177e4 | 1582 | return -EPERM; |
04a56dd8 TS |
1583 | if (info->locked) |
1584 | snd_seq_queue_use(info->queue, client->number, 1); | |
1da177e4 LT |
1585 | } else { |
1586 | return -EPERM; | |
1587 | } | |
1588 | ||
04a56dd8 | 1589 | q = queueptr(info->queue); |
1da177e4 LT |
1590 | if (! q) |
1591 | return -EINVAL; | |
1592 | if (q->owner != client->number) { | |
1593 | queuefree(q); | |
1594 | return -EPERM; | |
1595 | } | |
ca659c7b | 1596 | strscpy(q->name, info->name, sizeof(q->name)); |
1da177e4 LT |
1597 | queuefree(q); |
1598 | ||
1599 | return 0; | |
1600 | } | |
1601 | ||
1602 | /* GET_NAMED_QUEUE ioctl() */ | |
04a56dd8 TS |
1603 | static int snd_seq_ioctl_get_named_queue(struct snd_seq_client *client, |
1604 | void *arg) | |
1da177e4 | 1605 | { |
04a56dd8 | 1606 | struct snd_seq_queue_info *info = arg; |
c7e0b5bf | 1607 | struct snd_seq_queue *q; |
1da177e4 | 1608 | |
04a56dd8 | 1609 | q = snd_seq_queue_find_name(info->name); |
1da177e4 LT |
1610 | if (q == NULL) |
1611 | return -EINVAL; | |
04a56dd8 TS |
1612 | info->queue = q->queue; |
1613 | info->owner = q->owner; | |
1614 | info->locked = q->locked; | |
1da177e4 LT |
1615 | queuefree(q); |
1616 | ||
1da177e4 LT |
1617 | return 0; |
1618 | } | |
1619 | ||
1620 | /* GET_QUEUE_STATUS ioctl() */ | |
c7e0b5bf | 1621 | static int snd_seq_ioctl_get_queue_status(struct snd_seq_client *client, |
04a56dd8 | 1622 | void *arg) |
1da177e4 | 1623 | { |
04a56dd8 | 1624 | struct snd_seq_queue_status *status = arg; |
c7e0b5bf TI |
1625 | struct snd_seq_queue *queue; |
1626 | struct snd_seq_timer *tmr; | |
1da177e4 | 1627 | |
04a56dd8 | 1628 | queue = queueptr(status->queue); |
1da177e4 LT |
1629 | if (queue == NULL) |
1630 | return -EINVAL; | |
04a56dd8 TS |
1631 | memset(status, 0, sizeof(*status)); |
1632 | status->queue = queue->queue; | |
1da177e4 LT |
1633 | |
1634 | tmr = queue->timer; | |
04a56dd8 | 1635 | status->events = queue->tickq->cells + queue->timeq->cells; |
1da177e4 | 1636 | |
04a56dd8 TS |
1637 | status->time = snd_seq_timer_get_cur_time(tmr); |
1638 | status->tick = snd_seq_timer_get_cur_tick(tmr); | |
1da177e4 | 1639 | |
04a56dd8 | 1640 | status->running = tmr->running; |
1da177e4 | 1641 | |
04a56dd8 | 1642 | status->flags = queue->flags; |
1da177e4 LT |
1643 | queuefree(queue); |
1644 | ||
1da177e4 LT |
1645 | return 0; |
1646 | } | |
1647 | ||
1648 | ||
1649 | /* GET_QUEUE_TEMPO ioctl() */ | |
c7e0b5bf | 1650 | static int snd_seq_ioctl_get_queue_tempo(struct snd_seq_client *client, |
04a56dd8 | 1651 | void *arg) |
1da177e4 | 1652 | { |
04a56dd8 | 1653 | struct snd_seq_queue_tempo *tempo = arg; |
c7e0b5bf TI |
1654 | struct snd_seq_queue *queue; |
1655 | struct snd_seq_timer *tmr; | |
1da177e4 | 1656 | |
04a56dd8 | 1657 | queue = queueptr(tempo->queue); |
1da177e4 LT |
1658 | if (queue == NULL) |
1659 | return -EINVAL; | |
04a56dd8 TS |
1660 | memset(tempo, 0, sizeof(*tempo)); |
1661 | tempo->queue = queue->queue; | |
1da177e4 LT |
1662 | |
1663 | tmr = queue->timer; | |
1664 | ||
04a56dd8 TS |
1665 | tempo->tempo = tmr->tempo; |
1666 | tempo->ppq = tmr->ppq; | |
1667 | tempo->skew_value = tmr->skew; | |
1668 | tempo->skew_base = tmr->skew_base; | |
1da177e4 LT |
1669 | queuefree(queue); |
1670 | ||
1da177e4 LT |
1671 | return 0; |
1672 | } | |
1673 | ||
1674 | ||
1675 | /* SET_QUEUE_TEMPO ioctl() */ | |
c7e0b5bf | 1676 | int snd_seq_set_queue_tempo(int client, struct snd_seq_queue_tempo *tempo) |
1da177e4 LT |
1677 | { |
1678 | if (!snd_seq_queue_check_access(tempo->queue, client)) | |
1679 | return -EPERM; | |
1680 | return snd_seq_queue_timer_set_tempo(tempo->queue, client, tempo); | |
1681 | } | |
91715ed9 TI |
1682 | EXPORT_SYMBOL(snd_seq_set_queue_tempo); |
1683 | ||
c7e0b5bf | 1684 | static int snd_seq_ioctl_set_queue_tempo(struct snd_seq_client *client, |
04a56dd8 | 1685 | void *arg) |
1da177e4 | 1686 | { |
04a56dd8 | 1687 | struct snd_seq_queue_tempo *tempo = arg; |
1da177e4 | 1688 | int result; |
1da177e4 | 1689 | |
04a56dd8 | 1690 | result = snd_seq_set_queue_tempo(client->number, tempo); |
1da177e4 LT |
1691 | return result < 0 ? result : 0; |
1692 | } | |
1693 | ||
1694 | ||
1695 | /* GET_QUEUE_TIMER ioctl() */ | |
c7e0b5bf | 1696 | static int snd_seq_ioctl_get_queue_timer(struct snd_seq_client *client, |
04a56dd8 | 1697 | void *arg) |
1da177e4 | 1698 | { |
04a56dd8 | 1699 | struct snd_seq_queue_timer *timer = arg; |
c7e0b5bf TI |
1700 | struct snd_seq_queue *queue; |
1701 | struct snd_seq_timer *tmr; | |
1da177e4 | 1702 | |
04a56dd8 | 1703 | queue = queueptr(timer->queue); |
1da177e4 LT |
1704 | if (queue == NULL) |
1705 | return -EINVAL; | |
1706 | ||
1a60d4c5 | 1707 | if (mutex_lock_interruptible(&queue->timer_mutex)) { |
1da177e4 LT |
1708 | queuefree(queue); |
1709 | return -ERESTARTSYS; | |
1710 | } | |
1711 | tmr = queue->timer; | |
04a56dd8 TS |
1712 | memset(timer, 0, sizeof(*timer)); |
1713 | timer->queue = queue->queue; | |
1da177e4 | 1714 | |
04a56dd8 | 1715 | timer->type = tmr->type; |
1da177e4 | 1716 | if (tmr->type == SNDRV_SEQ_TIMER_ALSA) { |
04a56dd8 TS |
1717 | timer->u.alsa.id = tmr->alsa_id; |
1718 | timer->u.alsa.resolution = tmr->preferred_resolution; | |
1da177e4 | 1719 | } |
1a60d4c5 | 1720 | mutex_unlock(&queue->timer_mutex); |
1da177e4 LT |
1721 | queuefree(queue); |
1722 | ||
1da177e4 LT |
1723 | return 0; |
1724 | } | |
1725 | ||
1726 | ||
1727 | /* SET_QUEUE_TIMER ioctl() */ | |
c7e0b5bf | 1728 | static int snd_seq_ioctl_set_queue_timer(struct snd_seq_client *client, |
04a56dd8 | 1729 | void *arg) |
1da177e4 | 1730 | { |
04a56dd8 | 1731 | struct snd_seq_queue_timer *timer = arg; |
1da177e4 | 1732 | int result = 0; |
1da177e4 | 1733 | |
04a56dd8 | 1734 | if (timer->type != SNDRV_SEQ_TIMER_ALSA) |
1da177e4 LT |
1735 | return -EINVAL; |
1736 | ||
04a56dd8 | 1737 | if (snd_seq_queue_check_access(timer->queue, client->number)) { |
c7e0b5bf TI |
1738 | struct snd_seq_queue *q; |
1739 | struct snd_seq_timer *tmr; | |
1da177e4 | 1740 | |
04a56dd8 | 1741 | q = queueptr(timer->queue); |
1da177e4 LT |
1742 | if (q == NULL) |
1743 | return -ENXIO; | |
1a60d4c5 | 1744 | if (mutex_lock_interruptible(&q->timer_mutex)) { |
1da177e4 LT |
1745 | queuefree(q); |
1746 | return -ERESTARTSYS; | |
1747 | } | |
1748 | tmr = q->timer; | |
04a56dd8 TS |
1749 | snd_seq_queue_timer_close(timer->queue); |
1750 | tmr->type = timer->type; | |
1da177e4 | 1751 | if (tmr->type == SNDRV_SEQ_TIMER_ALSA) { |
04a56dd8 TS |
1752 | tmr->alsa_id = timer->u.alsa.id; |
1753 | tmr->preferred_resolution = timer->u.alsa.resolution; | |
1da177e4 | 1754 | } |
04a56dd8 | 1755 | result = snd_seq_queue_timer_open(timer->queue); |
1a60d4c5 | 1756 | mutex_unlock(&q->timer_mutex); |
1da177e4 LT |
1757 | queuefree(q); |
1758 | } else { | |
1759 | return -EPERM; | |
1760 | } | |
1761 | ||
1762 | return result; | |
1763 | } | |
1764 | ||
1765 | ||
1766 | /* GET_QUEUE_CLIENT ioctl() */ | |
c7e0b5bf | 1767 | static int snd_seq_ioctl_get_queue_client(struct snd_seq_client *client, |
04a56dd8 | 1768 | void *arg) |
1da177e4 | 1769 | { |
04a56dd8 | 1770 | struct snd_seq_queue_client *info = arg; |
1da177e4 LT |
1771 | int used; |
1772 | ||
04a56dd8 | 1773 | used = snd_seq_queue_is_used(info->queue, client->number); |
1da177e4 LT |
1774 | if (used < 0) |
1775 | return -EINVAL; | |
04a56dd8 TS |
1776 | info->used = used; |
1777 | info->client = client->number; | |
1da177e4 | 1778 | |
1da177e4 LT |
1779 | return 0; |
1780 | } | |
1781 | ||
1782 | ||
1783 | /* SET_QUEUE_CLIENT ioctl() */ | |
c7e0b5bf | 1784 | static int snd_seq_ioctl_set_queue_client(struct snd_seq_client *client, |
04a56dd8 | 1785 | void *arg) |
1da177e4 | 1786 | { |
04a56dd8 | 1787 | struct snd_seq_queue_client *info = arg; |
1da177e4 | 1788 | int err; |
1da177e4 | 1789 | |
04a56dd8 TS |
1790 | if (info->used >= 0) { |
1791 | err = snd_seq_queue_use(info->queue, client->number, info->used); | |
1da177e4 LT |
1792 | if (err < 0) |
1793 | return err; | |
1794 | } | |
1795 | ||
1796 | return snd_seq_ioctl_get_queue_client(client, arg); | |
1797 | } | |
1798 | ||
1799 | ||
1800 | /* GET_CLIENT_POOL ioctl() */ | |
c7e0b5bf | 1801 | static int snd_seq_ioctl_get_client_pool(struct snd_seq_client *client, |
04a56dd8 | 1802 | void *arg) |
1da177e4 | 1803 | { |
04a56dd8 | 1804 | struct snd_seq_client_pool *info = arg; |
c7e0b5bf | 1805 | struct snd_seq_client *cptr; |
1da177e4 | 1806 | |
04a56dd8 | 1807 | cptr = snd_seq_client_use_ptr(info->client); |
1da177e4 LT |
1808 | if (cptr == NULL) |
1809 | return -ENOENT; | |
04a56dd8 TS |
1810 | memset(info, 0, sizeof(*info)); |
1811 | info->client = cptr->number; | |
1812 | info->output_pool = cptr->pool->size; | |
1813 | info->output_room = cptr->pool->room; | |
1814 | info->output_free = info->output_pool; | |
1815 | info->output_free = snd_seq_unused_cells(cptr->pool); | |
1da177e4 | 1816 | if (cptr->type == USER_CLIENT) { |
04a56dd8 TS |
1817 | info->input_pool = cptr->data.user.fifo_pool_size; |
1818 | info->input_free = info->input_pool; | |
1da177e4 | 1819 | if (cptr->data.user.fifo) |
04a56dd8 | 1820 | info->input_free = snd_seq_unused_cells(cptr->data.user.fifo->pool); |
1da177e4 | 1821 | } else { |
04a56dd8 TS |
1822 | info->input_pool = 0; |
1823 | info->input_free = 0; | |
1da177e4 LT |
1824 | } |
1825 | snd_seq_client_unlock(cptr); | |
1826 | ||
1da177e4 LT |
1827 | return 0; |
1828 | } | |
1829 | ||
1830 | /* SET_CLIENT_POOL ioctl() */ | |
c7e0b5bf | 1831 | static int snd_seq_ioctl_set_client_pool(struct snd_seq_client *client, |
04a56dd8 | 1832 | void *arg) |
1da177e4 | 1833 | { |
04a56dd8 | 1834 | struct snd_seq_client_pool *info = arg; |
1da177e4 LT |
1835 | int rc; |
1836 | ||
04a56dd8 | 1837 | if (client->number != info->client) |
1da177e4 LT |
1838 | return -EINVAL; /* can't change other clients */ |
1839 | ||
04a56dd8 | 1840 | if (info->output_pool >= 1 && info->output_pool <= SNDRV_SEQ_MAX_EVENTS && |
1da177e4 | 1841 | (! snd_seq_write_pool_allocated(client) || |
04a56dd8 | 1842 | info->output_pool != client->pool->size)) { |
1da177e4 | 1843 | if (snd_seq_write_pool_allocated(client)) { |
298318e4 TI |
1844 | /* is the pool in use? */ |
1845 | if (atomic_read(&client->pool->counter)) | |
1846 | return -EBUSY; | |
1da177e4 | 1847 | /* remove all existing cells */ |
c520ff3d | 1848 | snd_seq_pool_mark_closing(client->pool); |
1da177e4 LT |
1849 | snd_seq_queue_client_leave_cells(client->number); |
1850 | snd_seq_pool_done(client->pool); | |
1851 | } | |
04a56dd8 | 1852 | client->pool->size = info->output_pool; |
1da177e4 LT |
1853 | rc = snd_seq_pool_init(client->pool); |
1854 | if (rc < 0) | |
1855 | return rc; | |
1856 | } | |
1857 | if (client->type == USER_CLIENT && client->data.user.fifo != NULL && | |
04a56dd8 TS |
1858 | info->input_pool >= 1 && |
1859 | info->input_pool <= SNDRV_SEQ_MAX_CLIENT_EVENTS && | |
1860 | info->input_pool != client->data.user.fifo_pool_size) { | |
1da177e4 | 1861 | /* change pool size */ |
04a56dd8 | 1862 | rc = snd_seq_fifo_resize(client->data.user.fifo, info->input_pool); |
1da177e4 LT |
1863 | if (rc < 0) |
1864 | return rc; | |
04a56dd8 | 1865 | client->data.user.fifo_pool_size = info->input_pool; |
1da177e4 | 1866 | } |
04a56dd8 TS |
1867 | if (info->output_room >= 1 && |
1868 | info->output_room <= client->pool->size) { | |
1869 | client->pool->room = info->output_room; | |
1da177e4 LT |
1870 | } |
1871 | ||
1872 | return snd_seq_ioctl_get_client_pool(client, arg); | |
1873 | } | |
1874 | ||
1875 | ||
1876 | /* REMOVE_EVENTS ioctl() */ | |
c7e0b5bf | 1877 | static int snd_seq_ioctl_remove_events(struct snd_seq_client *client, |
04a56dd8 | 1878 | void *arg) |
1da177e4 | 1879 | { |
04a56dd8 | 1880 | struct snd_seq_remove_events *info = arg; |
1da177e4 LT |
1881 | |
1882 | /* | |
1883 | * Input mostly not implemented XXX. | |
1884 | */ | |
04a56dd8 | 1885 | if (info->remove_mode & SNDRV_SEQ_REMOVE_INPUT) { |
1da177e4 LT |
1886 | /* |
1887 | * No restrictions so for a user client we can clear | |
1888 | * the whole fifo | |
1889 | */ | |
030e2c78 | 1890 | if (client->type == USER_CLIENT && client->data.user.fifo) |
1da177e4 LT |
1891 | snd_seq_fifo_clear(client->data.user.fifo); |
1892 | } | |
1893 | ||
04a56dd8 TS |
1894 | if (info->remove_mode & SNDRV_SEQ_REMOVE_OUTPUT) |
1895 | snd_seq_queue_remove_cells(client->number, info); | |
1da177e4 LT |
1896 | |
1897 | return 0; | |
1898 | } | |
1899 | ||
1900 | ||
1901 | /* | |
1902 | * get subscription info | |
1903 | */ | |
c7e0b5bf | 1904 | static int snd_seq_ioctl_get_subscription(struct snd_seq_client *client, |
04a56dd8 | 1905 | void *arg) |
1da177e4 | 1906 | { |
04a56dd8 | 1907 | struct snd_seq_port_subscribe *subs = arg; |
1da177e4 | 1908 | int result; |
c7e0b5bf TI |
1909 | struct snd_seq_client *sender = NULL; |
1910 | struct snd_seq_client_port *sport = NULL; | |
c7e0b5bf | 1911 | struct snd_seq_subscribers *p; |
1da177e4 | 1912 | |
1da177e4 | 1913 | result = -EINVAL; |
04a56dd8 | 1914 | if ((sender = snd_seq_client_use_ptr(subs->sender.client)) == NULL) |
1da177e4 | 1915 | goto __end; |
04a56dd8 | 1916 | if ((sport = snd_seq_port_use_ptr(sender, subs->sender.port)) == NULL) |
1da177e4 | 1917 | goto __end; |
04a56dd8 | 1918 | p = snd_seq_port_get_subscription(&sport->c_src, &subs->dest); |
1da177e4 LT |
1919 | if (p) { |
1920 | result = 0; | |
04a56dd8 | 1921 | *subs = p->info; |
1da177e4 LT |
1922 | } else |
1923 | result = -ENOENT; | |
1924 | ||
1925 | __end: | |
1926 | if (sport) | |
1927 | snd_seq_port_unlock(sport); | |
1928 | if (sender) | |
1929 | snd_seq_client_unlock(sender); | |
04a56dd8 | 1930 | |
1da177e4 LT |
1931 | return result; |
1932 | } | |
1933 | ||
1934 | ||
1935 | /* | |
1936 | * get subscription info - check only its presence | |
1937 | */ | |
04a56dd8 | 1938 | static int snd_seq_ioctl_query_subs(struct snd_seq_client *client, void *arg) |
1da177e4 | 1939 | { |
04a56dd8 | 1940 | struct snd_seq_query_subs *subs = arg; |
1da177e4 | 1941 | int result = -ENXIO; |
c7e0b5bf TI |
1942 | struct snd_seq_client *cptr = NULL; |
1943 | struct snd_seq_client_port *port = NULL; | |
c7e0b5bf | 1944 | struct snd_seq_port_subs_info *group; |
1da177e4 LT |
1945 | struct list_head *p; |
1946 | int i; | |
1947 | ||
04a56dd8 | 1948 | if ((cptr = snd_seq_client_use_ptr(subs->root.client)) == NULL) |
1da177e4 | 1949 | goto __end; |
04a56dd8 | 1950 | if ((port = snd_seq_port_use_ptr(cptr, subs->root.port)) == NULL) |
1da177e4 LT |
1951 | goto __end; |
1952 | ||
04a56dd8 | 1953 | switch (subs->type) { |
1da177e4 LT |
1954 | case SNDRV_SEQ_QUERY_SUBS_READ: |
1955 | group = &port->c_src; | |
1956 | break; | |
1957 | case SNDRV_SEQ_QUERY_SUBS_WRITE: | |
1958 | group = &port->c_dest; | |
1959 | break; | |
1960 | default: | |
1961 | goto __end; | |
1962 | } | |
1963 | ||
1964 | down_read(&group->list_mutex); | |
1965 | /* search for the subscriber */ | |
04a56dd8 | 1966 | subs->num_subs = group->count; |
1da177e4 LT |
1967 | i = 0; |
1968 | result = -ENOENT; | |
1969 | list_for_each(p, &group->list_head) { | |
04a56dd8 | 1970 | if (i++ == subs->index) { |
1da177e4 | 1971 | /* found! */ |
c7e0b5bf | 1972 | struct snd_seq_subscribers *s; |
04a56dd8 | 1973 | if (subs->type == SNDRV_SEQ_QUERY_SUBS_READ) { |
c7e0b5bf | 1974 | s = list_entry(p, struct snd_seq_subscribers, src_list); |
04a56dd8 | 1975 | subs->addr = s->info.dest; |
1da177e4 | 1976 | } else { |
c7e0b5bf | 1977 | s = list_entry(p, struct snd_seq_subscribers, dest_list); |
04a56dd8 | 1978 | subs->addr = s->info.sender; |
1da177e4 | 1979 | } |
04a56dd8 TS |
1980 | subs->flags = s->info.flags; |
1981 | subs->queue = s->info.queue; | |
1da177e4 LT |
1982 | result = 0; |
1983 | break; | |
1984 | } | |
1985 | } | |
1986 | up_read(&group->list_mutex); | |
1987 | ||
1988 | __end: | |
1989 | if (port) | |
1990 | snd_seq_port_unlock(port); | |
1991 | if (cptr) | |
1992 | snd_seq_client_unlock(cptr); | |
04a56dd8 | 1993 | |
1da177e4 LT |
1994 | return result; |
1995 | } | |
1996 | ||
1997 | ||
1998 | /* | |
1999 | * query next client | |
2000 | */ | |
c7e0b5bf | 2001 | static int snd_seq_ioctl_query_next_client(struct snd_seq_client *client, |
04a56dd8 | 2002 | void *arg) |
1da177e4 | 2003 | { |
04a56dd8 | 2004 | struct snd_seq_client_info *info = arg; |
c7e0b5bf | 2005 | struct snd_seq_client *cptr = NULL; |
1da177e4 LT |
2006 | |
2007 | /* search for next client */ | |
29a3e400 TI |
2008 | if (info->client < INT_MAX) |
2009 | info->client++; | |
04a56dd8 TS |
2010 | if (info->client < 0) |
2011 | info->client = 0; | |
2012 | for (; info->client < SNDRV_SEQ_MAX_CLIENTS; info->client++) { | |
2013 | cptr = snd_seq_client_use_ptr(info->client); | |
1da177e4 LT |
2014 | if (cptr) |
2015 | break; /* found */ | |
2016 | } | |
2017 | if (cptr == NULL) | |
2018 | return -ENOENT; | |
2019 | ||
04a56dd8 | 2020 | get_client_info(cptr, info); |
1da177e4 LT |
2021 | snd_seq_client_unlock(cptr); |
2022 | ||
1da177e4 LT |
2023 | return 0; |
2024 | } | |
2025 | ||
2026 | /* | |
2027 | * query next port | |
2028 | */ | |
c7e0b5bf | 2029 | static int snd_seq_ioctl_query_next_port(struct snd_seq_client *client, |
04a56dd8 | 2030 | void *arg) |
1da177e4 | 2031 | { |
04a56dd8 | 2032 | struct snd_seq_port_info *info = arg; |
c7e0b5bf TI |
2033 | struct snd_seq_client *cptr; |
2034 | struct snd_seq_client_port *port = NULL; | |
1da177e4 | 2035 | |
04a56dd8 | 2036 | cptr = snd_seq_client_use_ptr(info->addr.client); |
1da177e4 LT |
2037 | if (cptr == NULL) |
2038 | return -ENXIO; | |
2039 | ||
2040 | /* search for next port */ | |
04a56dd8 TS |
2041 | info->addr.port++; |
2042 | port = snd_seq_port_query_nearest(cptr, info); | |
1da177e4 LT |
2043 | if (port == NULL) { |
2044 | snd_seq_client_unlock(cptr); | |
2045 | return -ENOENT; | |
2046 | } | |
2047 | ||
2048 | /* get port info */ | |
04a56dd8 TS |
2049 | info->addr = port->addr; |
2050 | snd_seq_get_port_info(port, info); | |
1da177e4 LT |
2051 | snd_seq_port_unlock(port); |
2052 | snd_seq_client_unlock(cptr); | |
2053 | ||
1da177e4 LT |
2054 | return 0; |
2055 | } | |
2056 | ||
2057 | /* -------------------------------------------------------- */ | |
2058 | ||
8ce8eb60 TS |
2059 | static const struct ioctl_handler { |
2060 | unsigned int cmd; | |
2061 | int (*func)(struct snd_seq_client *client, void *arg); | |
2062 | } ioctl_handlers[] = { | |
04a56dd8 TS |
2063 | { SNDRV_SEQ_IOCTL_PVERSION, snd_seq_ioctl_pversion }, |
2064 | { SNDRV_SEQ_IOCTL_CLIENT_ID, snd_seq_ioctl_client_id }, | |
1da177e4 LT |
2065 | { SNDRV_SEQ_IOCTL_SYSTEM_INFO, snd_seq_ioctl_system_info }, |
2066 | { SNDRV_SEQ_IOCTL_RUNNING_MODE, snd_seq_ioctl_running_mode }, | |
2067 | { SNDRV_SEQ_IOCTL_GET_CLIENT_INFO, snd_seq_ioctl_get_client_info }, | |
2068 | { SNDRV_SEQ_IOCTL_SET_CLIENT_INFO, snd_seq_ioctl_set_client_info }, | |
2069 | { SNDRV_SEQ_IOCTL_CREATE_PORT, snd_seq_ioctl_create_port }, | |
2070 | { SNDRV_SEQ_IOCTL_DELETE_PORT, snd_seq_ioctl_delete_port }, | |
2071 | { SNDRV_SEQ_IOCTL_GET_PORT_INFO, snd_seq_ioctl_get_port_info }, | |
2072 | { SNDRV_SEQ_IOCTL_SET_PORT_INFO, snd_seq_ioctl_set_port_info }, | |
2073 | { SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT, snd_seq_ioctl_subscribe_port }, | |
2074 | { SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT, snd_seq_ioctl_unsubscribe_port }, | |
2075 | { SNDRV_SEQ_IOCTL_CREATE_QUEUE, snd_seq_ioctl_create_queue }, | |
2076 | { SNDRV_SEQ_IOCTL_DELETE_QUEUE, snd_seq_ioctl_delete_queue }, | |
2077 | { SNDRV_SEQ_IOCTL_GET_QUEUE_INFO, snd_seq_ioctl_get_queue_info }, | |
2078 | { SNDRV_SEQ_IOCTL_SET_QUEUE_INFO, snd_seq_ioctl_set_queue_info }, | |
2079 | { SNDRV_SEQ_IOCTL_GET_NAMED_QUEUE, snd_seq_ioctl_get_named_queue }, | |
2080 | { SNDRV_SEQ_IOCTL_GET_QUEUE_STATUS, snd_seq_ioctl_get_queue_status }, | |
2081 | { SNDRV_SEQ_IOCTL_GET_QUEUE_TEMPO, snd_seq_ioctl_get_queue_tempo }, | |
2082 | { SNDRV_SEQ_IOCTL_SET_QUEUE_TEMPO, snd_seq_ioctl_set_queue_tempo }, | |
2083 | { SNDRV_SEQ_IOCTL_GET_QUEUE_TIMER, snd_seq_ioctl_get_queue_timer }, | |
2084 | { SNDRV_SEQ_IOCTL_SET_QUEUE_TIMER, snd_seq_ioctl_set_queue_timer }, | |
2085 | { SNDRV_SEQ_IOCTL_GET_QUEUE_CLIENT, snd_seq_ioctl_get_queue_client }, | |
2086 | { SNDRV_SEQ_IOCTL_SET_QUEUE_CLIENT, snd_seq_ioctl_set_queue_client }, | |
2087 | { SNDRV_SEQ_IOCTL_GET_CLIENT_POOL, snd_seq_ioctl_get_client_pool }, | |
2088 | { SNDRV_SEQ_IOCTL_SET_CLIENT_POOL, snd_seq_ioctl_set_client_pool }, | |
2089 | { SNDRV_SEQ_IOCTL_GET_SUBSCRIPTION, snd_seq_ioctl_get_subscription }, | |
2090 | { SNDRV_SEQ_IOCTL_QUERY_NEXT_CLIENT, snd_seq_ioctl_query_next_client }, | |
2091 | { SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT, snd_seq_ioctl_query_next_port }, | |
2092 | { SNDRV_SEQ_IOCTL_REMOVE_EVENTS, snd_seq_ioctl_remove_events }, | |
2093 | { SNDRV_SEQ_IOCTL_QUERY_SUBS, snd_seq_ioctl_query_subs }, | |
2094 | { 0, NULL }, | |
2095 | }; | |
2096 | ||
e12ec251 TS |
2097 | static long snd_seq_ioctl(struct file *file, unsigned int cmd, |
2098 | unsigned long arg) | |
8ce8eb60 TS |
2099 | { |
2100 | struct snd_seq_client *client = file->private_data; | |
2101 | /* To use kernel stack for ioctl data. */ | |
4127e80a | 2102 | union { |
8ce8eb60 TS |
2103 | int pversion; |
2104 | int client_id; | |
2105 | struct snd_seq_system_info system_info; | |
2106 | struct snd_seq_running_info running_info; | |
2107 | struct snd_seq_client_info client_info; | |
2108 | struct snd_seq_port_info port_info; | |
2109 | struct snd_seq_port_subscribe port_subscribe; | |
2110 | struct snd_seq_queue_info queue_info; | |
2111 | struct snd_seq_queue_status queue_status; | |
2112 | struct snd_seq_queue_tempo tempo; | |
2113 | struct snd_seq_queue_timer queue_timer; | |
2114 | struct snd_seq_queue_client queue_client; | |
2115 | struct snd_seq_client_pool client_pool; | |
2116 | struct snd_seq_remove_events remove_events; | |
2117 | struct snd_seq_query_subs query_subs; | |
4127e80a | 2118 | } buf; |
8ce8eb60 TS |
2119 | const struct ioctl_handler *handler; |
2120 | unsigned long size; | |
2121 | int err; | |
2122 | ||
2123 | if (snd_BUG_ON(!client)) | |
2124 | return -ENXIO; | |
2125 | ||
2126 | for (handler = ioctl_handlers; handler->cmd > 0; ++handler) { | |
2127 | if (handler->cmd == cmd) | |
2128 | break; | |
2129 | } | |
2130 | if (handler->cmd == 0) | |
2131 | return -ENOTTY; | |
4127e80a TS |
2132 | |
2133 | memset(&buf, 0, sizeof(buf)); | |
2134 | ||
8ce8eb60 TS |
2135 | /* |
2136 | * All of ioctl commands for ALSA sequencer get an argument of size | |
2137 | * within 13 bits. We can safely pick up the size from the command. | |
2138 | */ | |
2139 | size = _IOC_SIZE(handler->cmd); | |
69b05825 | 2140 | if (handler->cmd & IOC_IN) { |
8ce8eb60 TS |
2141 | if (copy_from_user(&buf, (const void __user *)arg, size)) |
2142 | return -EFAULT; | |
2143 | } | |
2144 | ||
b3defb79 | 2145 | mutex_lock(&client->ioctl_mutex); |
8ce8eb60 | 2146 | err = handler->func(client, &buf); |
b3defb79 | 2147 | mutex_unlock(&client->ioctl_mutex); |
8ce8eb60 TS |
2148 | if (err >= 0) { |
2149 | /* Some commands includes a bug in 'dir' field. */ | |
2150 | if (handler->cmd == SNDRV_SEQ_IOCTL_SET_QUEUE_CLIENT || | |
2151 | handler->cmd == SNDRV_SEQ_IOCTL_SET_CLIENT_POOL || | |
69b05825 | 2152 | (handler->cmd & IOC_OUT)) |
8ce8eb60 TS |
2153 | if (copy_to_user((void __user *)arg, &buf, size)) |
2154 | return -EFAULT; | |
2155 | } | |
2156 | ||
2157 | return err; | |
2158 | } | |
2159 | ||
1da177e4 LT |
2160 | #ifdef CONFIG_COMPAT |
2161 | #include "seq_compat.c" | |
2162 | #else | |
2163 | #define snd_seq_ioctl_compat NULL | |
2164 | #endif | |
2165 | ||
2166 | /* -------------------------------------------------------- */ | |
2167 | ||
2168 | ||
2169 | /* exported to kernel modules */ | |
7b6d9245 CL |
2170 | int snd_seq_create_kernel_client(struct snd_card *card, int client_index, |
2171 | const char *name_fmt, ...) | |
1da177e4 | 2172 | { |
c7e0b5bf | 2173 | struct snd_seq_client *client; |
7b6d9245 | 2174 | va_list args; |
1da177e4 | 2175 | |
7eaa943c TI |
2176 | if (snd_BUG_ON(in_interrupt())) |
2177 | return -EBUSY; | |
1da177e4 | 2178 | |
aa1e77e6 | 2179 | if (card && client_index >= SNDRV_SEQ_CLIENTS_PER_CARD) |
1da177e4 | 2180 | return -EINVAL; |
aa1e77e6 | 2181 | if (card == NULL && client_index >= SNDRV_SEQ_GLOBAL_CLIENTS) |
1da177e4 | 2182 | return -EINVAL; |
1da177e4 | 2183 | |
1a60d4c5 | 2184 | if (mutex_lock_interruptible(®ister_mutex)) |
1da177e4 | 2185 | return -ERESTARTSYS; |
d001544d CL |
2186 | |
2187 | if (card) { | |
aa1e77e6 CL |
2188 | client_index += SNDRV_SEQ_GLOBAL_CLIENTS |
2189 | + card->number * SNDRV_SEQ_CLIENTS_PER_CARD; | |
2190 | if (client_index >= SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN) | |
d001544d CL |
2191 | client_index = -1; |
2192 | } | |
2193 | ||
1da177e4 | 2194 | /* empty write queue as default */ |
aa1e77e6 | 2195 | client = seq_create_client1(client_index, 0); |
1da177e4 | 2196 | if (client == NULL) { |
1a60d4c5 | 2197 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
2198 | return -EBUSY; /* failure code */ |
2199 | } | |
2200 | usage_alloc(&client_usage, 1); | |
2201 | ||
83e8ad69 CL |
2202 | client->accept_input = 1; |
2203 | client->accept_output = 1; | |
a1ce94d0 | 2204 | client->data.kernel.card = card; |
1da177e4 | 2205 | |
7b6d9245 CL |
2206 | va_start(args, name_fmt); |
2207 | vsnprintf(client->name, sizeof(client->name), name_fmt, args); | |
2208 | va_end(args); | |
1da177e4 LT |
2209 | |
2210 | client->type = KERNEL_CLIENT; | |
1a60d4c5 | 2211 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
2212 | |
2213 | /* make others aware this new client */ | |
2214 | snd_seq_system_client_ev_client_start(client->number); | |
2215 | ||
2216 | /* return client number to caller */ | |
2217 | return client->number; | |
2218 | } | |
91715ed9 TI |
2219 | EXPORT_SYMBOL(snd_seq_create_kernel_client); |
2220 | ||
1da177e4 LT |
2221 | /* exported to kernel modules */ |
2222 | int snd_seq_delete_kernel_client(int client) | |
2223 | { | |
c7e0b5bf | 2224 | struct snd_seq_client *ptr; |
1da177e4 | 2225 | |
7eaa943c TI |
2226 | if (snd_BUG_ON(in_interrupt())) |
2227 | return -EBUSY; | |
1da177e4 LT |
2228 | |
2229 | ptr = clientptr(client); | |
2230 | if (ptr == NULL) | |
2231 | return -EINVAL; | |
2232 | ||
2233 | seq_free_client(ptr); | |
2234 | kfree(ptr); | |
2235 | return 0; | |
2236 | } | |
91715ed9 | 2237 | EXPORT_SYMBOL(snd_seq_delete_kernel_client); |
1da177e4 LT |
2238 | |
2239 | /* skeleton to enqueue event, called from snd_seq_kernel_client_enqueue | |
2240 | * and snd_seq_kernel_client_enqueue_blocking | |
2241 | */ | |
c7e0b5bf | 2242 | static int kernel_client_enqueue(int client, struct snd_seq_event *ev, |
1da177e4 LT |
2243 | struct file *file, int blocking, |
2244 | int atomic, int hop) | |
2245 | { | |
c7e0b5bf | 2246 | struct snd_seq_client *cptr; |
1da177e4 LT |
2247 | int result; |
2248 | ||
7eaa943c TI |
2249 | if (snd_BUG_ON(!ev)) |
2250 | return -EINVAL; | |
1da177e4 LT |
2251 | |
2252 | if (ev->type == SNDRV_SEQ_EVENT_NONE) | |
2253 | return 0; /* ignore this */ | |
2254 | if (ev->type == SNDRV_SEQ_EVENT_KERNEL_ERROR) | |
2255 | return -EINVAL; /* quoted events can't be enqueued */ | |
2256 | ||
2257 | /* fill in client number */ | |
2258 | ev->source.client = client; | |
2259 | ||
2260 | if (check_event_type_and_length(ev)) | |
2261 | return -EINVAL; | |
2262 | ||
2263 | cptr = snd_seq_client_use_ptr(client); | |
2264 | if (cptr == NULL) | |
2265 | return -EINVAL; | |
2266 | ||
2267 | if (! cptr->accept_output) | |
2268 | result = -EPERM; | |
2269 | else /* send it */ | |
9737600d TI |
2270 | result = snd_seq_client_enqueue_event(cptr, ev, file, blocking, |
2271 | atomic, hop, NULL); | |
1da177e4 LT |
2272 | |
2273 | snd_seq_client_unlock(cptr); | |
2274 | return result; | |
2275 | } | |
2276 | ||
2277 | /* | |
2278 | * exported, called by kernel clients to enqueue events (w/o blocking) | |
2279 | * | |
2280 | * RETURN VALUE: zero if succeed, negative if error | |
2281 | */ | |
c7e0b5bf | 2282 | int snd_seq_kernel_client_enqueue(int client, struct snd_seq_event * ev, |
1da177e4 LT |
2283 | int atomic, int hop) |
2284 | { | |
2285 | return kernel_client_enqueue(client, ev, NULL, 0, atomic, hop); | |
2286 | } | |
91715ed9 TI |
2287 | EXPORT_SYMBOL(snd_seq_kernel_client_enqueue); |
2288 | ||
1da177e4 LT |
2289 | /* |
2290 | * exported, called by kernel clients to enqueue events (with blocking) | |
2291 | * | |
2292 | * RETURN VALUE: zero if succeed, negative if error | |
2293 | */ | |
c7e0b5bf | 2294 | int snd_seq_kernel_client_enqueue_blocking(int client, struct snd_seq_event * ev, |
1da177e4 LT |
2295 | struct file *file, |
2296 | int atomic, int hop) | |
2297 | { | |
2298 | return kernel_client_enqueue(client, ev, file, 1, atomic, hop); | |
2299 | } | |
91715ed9 | 2300 | EXPORT_SYMBOL(snd_seq_kernel_client_enqueue_blocking); |
1da177e4 LT |
2301 | |
2302 | /* | |
2303 | * exported, called by kernel clients to dispatch events directly to other | |
2304 | * clients, bypassing the queues. Event time-stamp will be updated. | |
2305 | * | |
2306 | * RETURN VALUE: negative = delivery failed, | |
2307 | * zero, or positive: the number of delivered events | |
2308 | */ | |
c7e0b5bf | 2309 | int snd_seq_kernel_client_dispatch(int client, struct snd_seq_event * ev, |
1da177e4 LT |
2310 | int atomic, int hop) |
2311 | { | |
c7e0b5bf | 2312 | struct snd_seq_client *cptr; |
1da177e4 LT |
2313 | int result; |
2314 | ||
7eaa943c TI |
2315 | if (snd_BUG_ON(!ev)) |
2316 | return -EINVAL; | |
1da177e4 LT |
2317 | |
2318 | /* fill in client number */ | |
2319 | ev->queue = SNDRV_SEQ_QUEUE_DIRECT; | |
2320 | ev->source.client = client; | |
2321 | ||
2322 | if (check_event_type_and_length(ev)) | |
2323 | return -EINVAL; | |
2324 | ||
2325 | cptr = snd_seq_client_use_ptr(client); | |
2326 | if (cptr == NULL) | |
2327 | return -EINVAL; | |
2328 | ||
2329 | if (!cptr->accept_output) | |
2330 | result = -EPERM; | |
2331 | else | |
2332 | result = snd_seq_deliver_event(cptr, ev, atomic, hop); | |
2333 | ||
2334 | snd_seq_client_unlock(cptr); | |
2335 | return result; | |
2336 | } | |
91715ed9 | 2337 | EXPORT_SYMBOL(snd_seq_kernel_client_dispatch); |
1da177e4 | 2338 | |
77dfa8d3 TS |
2339 | /** |
2340 | * snd_seq_kernel_client_ctl - operate a command for a client with data in | |
2341 | * kernel space. | |
2342 | * @clientid: A numerical ID for a client. | |
2343 | * @cmd: An ioctl(2) command for ALSA sequencer operation. | |
2344 | * @arg: A pointer to data in kernel space. | |
2345 | * | |
2346 | * Against its name, both kernel/application client can be handled by this | |
2347 | * kernel API. A pointer of 'arg' argument should be in kernel space. | |
2348 | * | |
2349 | * Return: 0 at success. Negative error code at failure. | |
1da177e4 LT |
2350 | */ |
2351 | int snd_seq_kernel_client_ctl(int clientid, unsigned int cmd, void *arg) | |
2352 | { | |
8ce8eb60 | 2353 | const struct ioctl_handler *handler; |
c7e0b5bf | 2354 | struct snd_seq_client *client; |
1da177e4 LT |
2355 | |
2356 | client = clientptr(clientid); | |
2357 | if (client == NULL) | |
2358 | return -ENXIO; | |
8ce8eb60 TS |
2359 | |
2360 | for (handler = ioctl_handlers; handler->cmd > 0; ++handler) { | |
2361 | if (handler->cmd == cmd) | |
2362 | return handler->func(client, arg); | |
2363 | } | |
2364 | ||
e12ec251 TS |
2365 | pr_debug("ALSA: seq unknown ioctl() 0x%x (type='%c', number=0x%02x)\n", |
2366 | cmd, _IOC_TYPE(cmd), _IOC_NR(cmd)); | |
2367 | return -ENOTTY; | |
1da177e4 | 2368 | } |
91715ed9 | 2369 | EXPORT_SYMBOL(snd_seq_kernel_client_ctl); |
1da177e4 LT |
2370 | |
2371 | /* exported (for OSS emulator) */ | |
2372 | int snd_seq_kernel_client_write_poll(int clientid, struct file *file, poll_table *wait) | |
2373 | { | |
c7e0b5bf | 2374 | struct snd_seq_client *client; |
1da177e4 LT |
2375 | |
2376 | client = clientptr(clientid); | |
2377 | if (client == NULL) | |
2378 | return -ENXIO; | |
2379 | ||
2380 | if (! snd_seq_write_pool_allocated(client)) | |
2381 | return 1; | |
2382 | if (snd_seq_pool_poll_wait(client->pool, file, wait)) | |
2383 | return 1; | |
2384 | return 0; | |
2385 | } | |
91715ed9 TI |
2386 | EXPORT_SYMBOL(snd_seq_kernel_client_write_poll); |
2387 | ||
1da177e4 LT |
2388 | /*---------------------------------------------------------------------------*/ |
2389 | ||
cd6a6503 | 2390 | #ifdef CONFIG_SND_PROC_FS |
1da177e4 LT |
2391 | /* |
2392 | * /proc interface | |
2393 | */ | |
c7e0b5bf TI |
2394 | static void snd_seq_info_dump_subscribers(struct snd_info_buffer *buffer, |
2395 | struct snd_seq_port_subs_info *group, | |
2396 | int is_src, char *msg) | |
1da177e4 LT |
2397 | { |
2398 | struct list_head *p; | |
c7e0b5bf | 2399 | struct snd_seq_subscribers *s; |
1da177e4 LT |
2400 | int count = 0; |
2401 | ||
2402 | down_read(&group->list_mutex); | |
2403 | if (list_empty(&group->list_head)) { | |
2404 | up_read(&group->list_mutex); | |
2405 | return; | |
2406 | } | |
2407 | snd_iprintf(buffer, msg); | |
2408 | list_for_each(p, &group->list_head) { | |
2409 | if (is_src) | |
c7e0b5bf | 2410 | s = list_entry(p, struct snd_seq_subscribers, src_list); |
1da177e4 | 2411 | else |
c7e0b5bf | 2412 | s = list_entry(p, struct snd_seq_subscribers, dest_list); |
1da177e4 LT |
2413 | if (count++) |
2414 | snd_iprintf(buffer, ", "); | |
2415 | snd_iprintf(buffer, "%d:%d", | |
2416 | is_src ? s->info.dest.client : s->info.sender.client, | |
2417 | is_src ? s->info.dest.port : s->info.sender.port); | |
2418 | if (s->info.flags & SNDRV_SEQ_PORT_SUBS_TIMESTAMP) | |
2419 | snd_iprintf(buffer, "[%c:%d]", ((s->info.flags & SNDRV_SEQ_PORT_SUBS_TIME_REAL) ? 'r' : 't'), s->info.queue); | |
2420 | if (group->exclusive) | |
2421 | snd_iprintf(buffer, "[ex]"); | |
2422 | } | |
2423 | up_read(&group->list_mutex); | |
2424 | snd_iprintf(buffer, "\n"); | |
2425 | } | |
2426 | ||
2427 | #define FLAG_PERM_RD(perm) ((perm) & SNDRV_SEQ_PORT_CAP_READ ? ((perm) & SNDRV_SEQ_PORT_CAP_SUBS_READ ? 'R' : 'r') : '-') | |
2428 | #define FLAG_PERM_WR(perm) ((perm) & SNDRV_SEQ_PORT_CAP_WRITE ? ((perm) & SNDRV_SEQ_PORT_CAP_SUBS_WRITE ? 'W' : 'w') : '-') | |
2429 | #define FLAG_PERM_EX(perm) ((perm) & SNDRV_SEQ_PORT_CAP_NO_EXPORT ? '-' : 'e') | |
2430 | ||
2431 | #define FLAG_PERM_DUPLEX(perm) ((perm) & SNDRV_SEQ_PORT_CAP_DUPLEX ? 'X' : '-') | |
2432 | ||
c7e0b5bf TI |
2433 | static void snd_seq_info_dump_ports(struct snd_info_buffer *buffer, |
2434 | struct snd_seq_client *client) | |
1da177e4 | 2435 | { |
9244b2c3 | 2436 | struct snd_seq_client_port *p; |
1da177e4 | 2437 | |
1a60d4c5 | 2438 | mutex_lock(&client->ports_mutex); |
9244b2c3 | 2439 | list_for_each_entry(p, &client->ports_list_head, list) { |
1da177e4 LT |
2440 | snd_iprintf(buffer, " Port %3d : \"%s\" (%c%c%c%c)\n", |
2441 | p->addr.port, p->name, | |
2442 | FLAG_PERM_RD(p->capability), | |
2443 | FLAG_PERM_WR(p->capability), | |
2444 | FLAG_PERM_EX(p->capability), | |
2445 | FLAG_PERM_DUPLEX(p->capability)); | |
2446 | snd_seq_info_dump_subscribers(buffer, &p->c_src, 1, " Connecting To: "); | |
2447 | snd_seq_info_dump_subscribers(buffer, &p->c_dest, 0, " Connected From: "); | |
2448 | } | |
1a60d4c5 | 2449 | mutex_unlock(&client->ports_mutex); |
1da177e4 LT |
2450 | } |
2451 | ||
2452 | ||
2453 | /* exported to seq_info.c */ | |
c7e0b5bf TI |
2454 | void snd_seq_info_clients_read(struct snd_info_entry *entry, |
2455 | struct snd_info_buffer *buffer) | |
1da177e4 | 2456 | { |
1da177e4 | 2457 | int c; |
c7e0b5bf | 2458 | struct snd_seq_client *client; |
1da177e4 LT |
2459 | |
2460 | snd_iprintf(buffer, "Client info\n"); | |
2461 | snd_iprintf(buffer, " cur clients : %d\n", client_usage.cur); | |
2462 | snd_iprintf(buffer, " peak clients : %d\n", client_usage.peak); | |
2463 | snd_iprintf(buffer, " max clients : %d\n", SNDRV_SEQ_MAX_CLIENTS); | |
2464 | snd_iprintf(buffer, "\n"); | |
2465 | ||
2466 | /* list the client table */ | |
2467 | for (c = 0; c < SNDRV_SEQ_MAX_CLIENTS; c++) { | |
2468 | client = snd_seq_client_use_ptr(c); | |
2469 | if (client == NULL) | |
2470 | continue; | |
2471 | if (client->type == NO_CLIENT) { | |
2472 | snd_seq_client_unlock(client); | |
2473 | continue; | |
2474 | } | |
2475 | ||
2476 | snd_iprintf(buffer, "Client %3d : \"%s\" [%s]\n", | |
2477 | c, client->name, | |
2478 | client->type == USER_CLIENT ? "User" : "Kernel"); | |
2479 | snd_seq_info_dump_ports(buffer, client); | |
2480 | if (snd_seq_write_pool_allocated(client)) { | |
2481 | snd_iprintf(buffer, " Output pool :\n"); | |
2482 | snd_seq_info_pool(buffer, client->pool, " "); | |
2483 | } | |
2484 | if (client->type == USER_CLIENT && client->data.user.fifo && | |
2485 | client->data.user.fifo->pool) { | |
2486 | snd_iprintf(buffer, " Input pool :\n"); | |
2487 | snd_seq_info_pool(buffer, client->data.user.fifo->pool, " "); | |
2488 | } | |
2489 | snd_seq_client_unlock(client); | |
2490 | } | |
2491 | } | |
cd6a6503 | 2492 | #endif /* CONFIG_SND_PROC_FS */ |
1da177e4 LT |
2493 | |
2494 | /*---------------------------------------------------------------------------*/ | |
2495 | ||
2496 | ||
2497 | /* | |
2498 | * REGISTRATION PART | |
2499 | */ | |
2500 | ||
9c2e08c5 | 2501 | static const struct file_operations snd_seq_f_ops = |
1da177e4 LT |
2502 | { |
2503 | .owner = THIS_MODULE, | |
2504 | .read = snd_seq_read, | |
2505 | .write = snd_seq_write, | |
2506 | .open = snd_seq_open, | |
2507 | .release = snd_seq_release, | |
02f4865f | 2508 | .llseek = no_llseek, |
1da177e4 LT |
2509 | .poll = snd_seq_poll, |
2510 | .unlocked_ioctl = snd_seq_ioctl, | |
2511 | .compat_ioctl = snd_seq_ioctl_compat, | |
2512 | }; | |
2513 | ||
5205388d TI |
2514 | static struct device seq_dev; |
2515 | ||
1da177e4 LT |
2516 | /* |
2517 | * register sequencer device | |
2518 | */ | |
2519 | int __init snd_sequencer_device_init(void) | |
2520 | { | |
2521 | int err; | |
2522 | ||
5205388d TI |
2523 | snd_device_initialize(&seq_dev, NULL); |
2524 | dev_set_name(&seq_dev, "seq"); | |
2525 | ||
1a60d4c5 | 2526 | if (mutex_lock_interruptible(®ister_mutex)) |
1da177e4 LT |
2527 | return -ERESTARTSYS; |
2528 | ||
40a4b263 TI |
2529 | err = snd_register_device(SNDRV_DEVICE_TYPE_SEQUENCER, NULL, 0, |
2530 | &snd_seq_f_ops, NULL, &seq_dev); | |
5205388d | 2531 | if (err < 0) { |
1a60d4c5 | 2532 | mutex_unlock(®ister_mutex); |
5205388d | 2533 | put_device(&seq_dev); |
1da177e4 LT |
2534 | return err; |
2535 | } | |
2536 | ||
1a60d4c5 | 2537 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
2538 | |
2539 | return 0; | |
2540 | } | |
2541 | ||
2542 | ||
2543 | ||
2544 | /* | |
2545 | * unregister sequencer device | |
2546 | */ | |
2547 | void __exit snd_sequencer_device_done(void) | |
2548 | { | |
40a4b263 | 2549 | snd_unregister_device(&seq_dev); |
5205388d | 2550 | put_device(&seq_dev); |
1da177e4 | 2551 | } |