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Merge tag 'v3.10.107' into update
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / sound / core / seq / seq_clientmgr.c
CommitLineData
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
68static DEFINE_SPINLOCK(clients_lock);
1a60d4c5 69static DEFINE_MUTEX(register_mutex);
1da177e4
LT		 70
71/*
72 * client table
73 */
74static char clienttablock[SNDRV_SEQ_MAX_CLIENTS];
c7e0b5bf
TI		 75static struct snd_seq_client *clienttab[SNDRV_SEQ_MAX_CLIENTS];
76static struct snd_seq_usage client_usage;
1da177e4
LT		 77
78/*
79 * prototypes
80 */
c7e0b5bf
TI		 81static int bounce_error_event(struct snd_seq_client *client,
82 struct snd_seq_event *event,
83 int err, int atomic, int hop);
84static int snd_seq_deliver_single_event(struct snd_seq_client *client,
85 struct snd_seq_event *event,
86 int filter, int atomic, int hop);
1da177e4
LT		 87
88/*
89 */
90
91static inline mm_segment_t snd_enter_user(void)
92{
93 mm_segment_t fs = get_fs();
94 set_fs(get_ds());
95 return fs;
96}
97
98static inline void snd_leave_user(mm_segment_t fs)
99{
100 set_fs(fs);
101}
102
103/*
104 */
105static inline unsigned short snd_seq_file_flags(struct file *file)
106{
107 switch (file->f_mode & (FMODE_READ | FMODE_WRITE)) {
108 case FMODE_WRITE:
109 return SNDRV_SEQ_LFLG_OUTPUT;
110 case FMODE_READ:
111 return SNDRV_SEQ_LFLG_INPUT;
112 default:
113 return SNDRV_SEQ_LFLG_OPEN;
114 }
115}
116
c7e0b5bf 117static inline int snd_seq_write_pool_allocated(struct snd_seq_client *client)
1da177e4
LT		 118{
119 return snd_seq_total_cells(client->pool) > 0;
120}
121
122/* return pointer to client structure for specified id */
c7e0b5bf 123static struct snd_seq_client *clientptr(int clientid)
1da177e4
LT		 124{
125 if (clientid < 0 || clientid >= SNDRV_SEQ_MAX_CLIENTS) {
c7e0b5bf
TI		 126 snd_printd("Seq: oops. Trying to get pointer to client %d\n",
127 clientid);
1da177e4
LT		 128 return NULL;
129 }
130 return clienttab[clientid];
131}
132
c7e0b5bf 133struct snd_seq_client *snd_seq_client_use_ptr(int clientid)
1da177e4
LT		 134{
135 unsigned long flags;
c7e0b5bf 136 struct snd_seq_client *client;
1da177e4
LT		 137
138 if (clientid < 0 || clientid >= SNDRV_SEQ_MAX_CLIENTS) {
c7e0b5bf
TI		 139 snd_printd("Seq: oops. Trying to get pointer to client %d\n",
140 clientid);
1da177e4
LT		 141 return NULL;
142 }
143 spin_lock_irqsave(&clients_lock, flags);
144 client = clientptr(clientid);
145 if (client)
146 goto __lock;
147 if (clienttablock[clientid]) {
148 spin_unlock_irqrestore(&clients_lock, flags);
149 return NULL;
150 }
151 spin_unlock_irqrestore(&clients_lock, flags);
ee2da997 152#ifdef CONFIG_MODULES
0d63e4f9 153 if (!in_interrupt()) {
aa1e77e6 154 static char client_requested[SNDRV_SEQ_GLOBAL_CLIENTS];
1da177e4 155 static char card_requested[SNDRV_CARDS];
aa1e77e6 156 if (clientid < SNDRV_SEQ_GLOBAL_CLIENTS) {
1da177e4
LT		 157 int idx;
158
0d63e4f9 159 if (!client_requested[clientid]) {
1da177e4 160 client_requested[clientid] = 1;
aa1e77e6 161 for (idx = 0; idx < 15; idx++) {
1da177e4
LT		 162 if (seq_client_load[idx] < 0)
163 break;
164 if (seq_client_load[idx] == clientid) {
c7e0b5bf
TI		 165 request_module("snd-seq-client-%i",
166 clientid);
1da177e4
LT		 167 break;
168 }
169 }
170 }
aa1e77e6
CL		 171 } else if (clientid < SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN) {
172 int card = (clientid - SNDRV_SEQ_GLOBAL_CLIENTS) /
173 SNDRV_SEQ_CLIENTS_PER_CARD;
1da177e4
LT		 174 if (card < snd_ecards_limit) {
175 if (! card_requested[card]) {
176 card_requested[card] = 1;
177 snd_request_card(card);
178 }
179 snd_seq_device_load_drivers();
180 }
181 }
182 spin_lock_irqsave(&clients_lock, flags);
183 client = clientptr(clientid);
184 if (client)
185 goto __lock;
186 spin_unlock_irqrestore(&clients_lock, flags);
187 }
188#endif
189 return NULL;
190
191 __lock:
192 snd_use_lock_use(&client->use_lock);
193 spin_unlock_irqrestore(&clients_lock, flags);
194 return client;
195}
196
c7e0b5bf 197static void usage_alloc(struct snd_seq_usage *res, int num)
1da177e4
LT		 198{
199 res->cur += num;
200 if (res->cur > res->peak)
201 res->peak = res->cur;
202}
203
c7e0b5bf 204static void usage_free(struct snd_seq_usage *res, int num)
1da177e4
LT		 205{
206 res->cur -= num;
207}
208
209/* initialise data structures */
210int __init client_init_data(void)
211{
212 /* zap out the client table */
213 memset(&clienttablock, 0, sizeof(clienttablock));
214 memset(&clienttab, 0, sizeof(clienttab));
215 return 0;
216}
217
218
aa1e77e6 219static struct snd_seq_client *seq_create_client1(int client_index, int poolsize)
1da177e4
LT		 220{
221 unsigned long flags;
222 int c;
c7e0b5bf 223 struct snd_seq_client *client;
1da177e4
LT		 224
225 /* init client data */
ecca82b4 226 client = kzalloc(sizeof(*client), GFP_KERNEL);
1da177e4
LT		 227 if (client == NULL)
228 return NULL;
229 client->pool = snd_seq_pool_new(poolsize);
230 if (client->pool == NULL) {
231 kfree(client);
232 return NULL;
233 }
234 client->type = NO_CLIENT;
235 snd_use_lock_init(&client->use_lock);
236 rwlock_init(&client->ports_lock);
1a60d4c5 237 mutex_init(&client->ports_mutex);
1da177e4
LT		 238 INIT_LIST_HEAD(&client->ports_list_head);
239
240 /* find free slot in the client table */
241 spin_lock_irqsave(&clients_lock, flags);
242 if (client_index < 0) {
aa1e77e6
CL		 243 for (c = SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN;
244 c < SNDRV_SEQ_MAX_CLIENTS;
245 c++) {
1da177e4
LT		 246 if (clienttab[c] || clienttablock[c])
247 continue;
248 clienttab[client->number = c] = client;
249 spin_unlock_irqrestore(&clients_lock, flags);
250 return client;
251 }
252 } else {
253 if (clienttab[client_index] == NULL && !clienttablock[client_index]) {
254 clienttab[client->number = client_index] = client;
255 spin_unlock_irqrestore(&clients_lock, flags);
256 return client;
257 }
258 }
259 spin_unlock_irqrestore(&clients_lock, flags);
260 snd_seq_pool_delete(&client->pool);
261 kfree(client);
262 return NULL; /* no free slot found or busy, return failure code */
263}
264
265
c7e0b5bf 266static int seq_free_client1(struct snd_seq_client *client)
1da177e4
LT		 267{
268 unsigned long flags;
269
7eaa943c
TI		 270 if (!client)
271 return 0;
1da177e4
LT		 272 snd_seq_delete_all_ports(client);
273 snd_seq_queue_client_leave(client->number);
274 spin_lock_irqsave(&clients_lock, flags);
275 clienttablock[client->number] = 1;
276 clienttab[client->number] = NULL;
277 spin_unlock_irqrestore(&clients_lock, flags);
278 snd_use_lock_sync(&client->use_lock);
279 snd_seq_queue_client_termination(client->number);
280 if (client->pool)
281 snd_seq_pool_delete(&client->pool);
282 spin_lock_irqsave(&clients_lock, flags);
283 clienttablock[client->number] = 0;
284 spin_unlock_irqrestore(&clients_lock, flags);
285 return 0;
286}
287
288
c7e0b5bf 289static void seq_free_client(struct snd_seq_client * client)
1da177e4 290{
1a60d4c5 291 mutex_lock(&register_mutex);
1da177e4
LT		 292 switch (client->type) {
293 case NO_CLIENT:
c7e0b5bf
TI		 294 snd_printk(KERN_WARNING "Seq: Trying to free unused client %d\n",
295 client->number);
1da177e4
LT		 296 break;
297 case USER_CLIENT:
298 case KERNEL_CLIENT:
299 seq_free_client1(client);
300 usage_free(&client_usage, 1);
301 break;
302
303 default:
c7e0b5bf
TI		 304 snd_printk(KERN_ERR "Seq: Trying to free client %d with undefined type = %d\n",
305 client->number, client->type);
1da177e4 306 }
1a60d4c5 307 mutex_unlock(&register_mutex);
1da177e4
LT		 308
309 snd_seq_system_client_ev_client_exit(client->number);
310}
311
312
313
314/* -------------------------------------------------------- */
315
316/* create a user client */
317static int snd_seq_open(struct inode *inode, struct file *file)
318{
319 int c, mode; /* client id */
c7e0b5bf
TI		 320 struct snd_seq_client *client;
321 struct snd_seq_user_client *user;
02f4865f
TI		 322 int err;
323
324 err = nonseekable_open(inode, file);
325 if (err < 0)
326 return err;
1da177e4 327
1a60d4c5 328 if (mutex_lock_interruptible(&register_mutex))
1da177e4 329 return -ERESTARTSYS;
aa1e77e6 330 client = seq_create_client1(-1, SNDRV_SEQ_DEFAULT_EVENTS);
1da177e4 331 if (client == NULL) {
1a60d4c5 332 mutex_unlock(&register_mutex);
1da177e4
LT		 333 return -ENOMEM; /* failure code */
334 }
335
336 mode = snd_seq_file_flags(file);
337 if (mode & SNDRV_SEQ_LFLG_INPUT)
338 client->accept_input = 1;
339 if (mode & SNDRV_SEQ_LFLG_OUTPUT)
340 client->accept_output = 1;
341
342 user = &client->data.user;
343 user->fifo = NULL;
344 user->fifo_pool_size = 0;
345
346 if (mode & SNDRV_SEQ_LFLG_INPUT) {
347 user->fifo_pool_size = SNDRV_SEQ_DEFAULT_CLIENT_EVENTS;
348 user->fifo = snd_seq_fifo_new(user->fifo_pool_size);
349 if (user->fifo == NULL) {
350 seq_free_client1(client);
351 kfree(client);
1a60d4c5 352 mutex_unlock(&register_mutex);
1da177e4
LT		 353 return -ENOMEM;
354 }
355 }
356
357 usage_alloc(&client_usage, 1);
358 client->type = USER_CLIENT;
1a60d4c5 359 mutex_unlock(&register_mutex);
1da177e4
LT		 360
361 c = client->number;
362 file->private_data = client;
363
364 /* fill client data */
365 user->file = file;
366 sprintf(client->name, "Client-%d", c);
367
368 /* make others aware this new client */
369 snd_seq_system_client_ev_client_start(c);
370
371 return 0;
372}
373
374/* delete a user client */
375static int snd_seq_release(struct inode *inode, struct file *file)
376{
c7e0b5bf 377 struct snd_seq_client *client = file->private_data;
1da177e4
LT		 378
379 if (client) {
380 seq_free_client(client);
381 if (client->data.user.fifo)
382 snd_seq_fifo_delete(&client->data.user.fifo);
383 kfree(client);
384 }
385
386 return 0;
387}
388
389
390/* handle client read() */
391/* possible error values:
392 * -ENXIO invalid client or file open mode
393 * -ENOSPC FIFO overflow (the flag is cleared after this error report)
394 * -EINVAL no enough user-space buffer to write the whole event
395 * -EFAULT seg. fault during copy to user space
396 */
c7e0b5bf
TI		 397static ssize_t snd_seq_read(struct file *file, char __user *buf, size_t count,
398 loff_t *offset)
1da177e4 399{
c7e0b5bf
TI		 400 struct snd_seq_client *client = file->private_data;
401 struct snd_seq_fifo *fifo;
1da177e4
LT		 402 int err;
403 long result = 0;
c7e0b5bf 404 struct snd_seq_event_cell *cell;
1da177e4
LT		 405
406 if (!(snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_INPUT))
407 return -ENXIO;
408
409 if (!access_ok(VERIFY_WRITE, buf, count))
410 return -EFAULT;
411
412 /* check client structures are in place */
7eaa943c
TI		 413 if (snd_BUG_ON(!client))
414 return -ENXIO;
1da177e4
LT		 415
416 if (!client->accept_input || (fifo = client->data.user.fifo) == NULL)
417 return -ENXIO;
418
419 if (atomic_read(&fifo->overflow) > 0) {
420 /* buffer overflow is detected */
421 snd_seq_fifo_clear(fifo);
422 /* return error code */
423 return -ENOSPC;
424 }
425
426 cell = NULL;
427 err = 0;
428 snd_seq_fifo_lock(fifo);
429
430 /* while data available in queue */
c7e0b5bf 431 while (count >= sizeof(struct snd_seq_event)) {
1da177e4
LT		 432 int nonblock;
433
434 nonblock = (file->f_flags & O_NONBLOCK) || result > 0;
435 if ((err = snd_seq_fifo_cell_out(fifo, &cell, nonblock)) < 0) {
436 break;
437 }
438 if (snd_seq_ev_is_variable(&cell->event)) {
c7e0b5bf 439 struct snd_seq_event tmpev;
1da177e4
LT		 440 tmpev = cell->event;
441 tmpev.data.ext.len &= ~SNDRV_SEQ_EXT_MASK;
c7e0b5bf 442 if (copy_to_user(buf, &tmpev, sizeof(struct snd_seq_event))) {
1da177e4
LT		 443 err = -EFAULT;
444 break;
445 }
c7e0b5bf
TI		 446 count -= sizeof(struct snd_seq_event);
447 buf += sizeof(struct snd_seq_event);
4d23359b
CL		 448 err = snd_seq_expand_var_event(&cell->event, count,
449 (char __force *)buf, 0,
c7e0b5bf 450 sizeof(struct snd_seq_event));
1da177e4
LT		 451 if (err < 0)
452 break;
453 result += err;
454 count -= err;
455 buf += err;
456 } else {
c7e0b5bf 457 if (copy_to_user(buf, &cell->event, sizeof(struct snd_seq_event))) {
1da177e4
LT		 458 err = -EFAULT;
459 break;
460 }
c7e0b5bf
TI		 461 count -= sizeof(struct snd_seq_event);
462 buf += sizeof(struct snd_seq_event);
1da177e4
LT		 463 }
464 snd_seq_cell_free(cell);
465 cell = NULL; /* to be sure */
c7e0b5bf 466 result += sizeof(struct snd_seq_event);
1da177e4
LT		 467 }
468
469 if (err < 0) {
470 if (cell)
471 snd_seq_fifo_cell_putback(fifo, cell);
472 if (err == -EAGAIN && result > 0)
473 err = 0;
474 }
475 snd_seq_fifo_unlock(fifo);
476
477 return (err < 0) ? err : result;
478}
479
480
481/*
482 * check access permission to the port
483 */
c7e0b5bf 484static int check_port_perm(struct snd_seq_client_port *port, unsigned int flags)
1da177e4
LT		 485{
486 if ((port->capability & flags) != flags)
487 return 0;
488 return flags;
489}
490
491/*
492 * check if the destination client is available, and return the pointer
493 * if filter is non-zero, client filter bitmap is tested.
494 */
c7e0b5bf
TI		 495static struct snd_seq_client *get_event_dest_client(struct snd_seq_event *event,
496 int filter)
1da177e4 497{
c7e0b5bf 498 struct snd_seq_client *dest;
1da177e4
LT		 499
500 dest = snd_seq_client_use_ptr(event->dest.client);
501 if (dest == NULL)
502 return NULL;
503 if (! dest->accept_input)
504 goto __not_avail;
505 if ((dest->filter & SNDRV_SEQ_FILTER_USE_EVENT) &&
506 ! test_bit(event->type, dest->event_filter))
507 goto __not_avail;
508 if (filter && !(dest->filter & filter))
509 goto __not_avail;
510
511 return dest; /* ok - accessible */
512__not_avail:
513 snd_seq_client_unlock(dest);
514 return NULL;
515}
516
517
518/*
519 * Return the error event.
520 *
521 * If the receiver client is a user client, the original event is
522 * encapsulated in SNDRV_SEQ_EVENT_BOUNCE as variable length event. If
523 * the original event is also variable length, the external data is
524 * copied after the event record.
525 * If the receiver client is a kernel client, the original event is
526 * quoted in SNDRV_SEQ_EVENT_KERNEL_ERROR, since this requires no extra
527 * kmalloc.
528 */
c7e0b5bf
TI		 529static int bounce_error_event(struct snd_seq_client *client,
530 struct snd_seq_event *event,
1da177e4
LT		 531 int err, int atomic, int hop)
532{
c7e0b5bf 533 struct snd_seq_event bounce_ev;
1da177e4
LT		 534 int result;
535
536 if (client == NULL ||
537 ! (client->filter & SNDRV_SEQ_FILTER_BOUNCE) ||
538 ! client->accept_input)
539 return 0; /* ignored */
540
541 /* set up quoted error */
542 memset(&bounce_ev, 0, sizeof(bounce_ev));
543 bounce_ev.type = SNDRV_SEQ_EVENT_KERNEL_ERROR;
544 bounce_ev.flags = SNDRV_SEQ_EVENT_LENGTH_FIXED;
545 bounce_ev.queue = SNDRV_SEQ_QUEUE_DIRECT;
546 bounce_ev.source.client = SNDRV_SEQ_CLIENT_SYSTEM;
547 bounce_ev.source.port = SNDRV_SEQ_PORT_SYSTEM_ANNOUNCE;
548 bounce_ev.dest.client = client->number;
549 bounce_ev.dest.port = event->source.port;
550 bounce_ev.data.quote.origin = event->dest;
551 bounce_ev.data.quote.event = event;
552 bounce_ev.data.quote.value = -err; /* use positive value */
553 result = snd_seq_deliver_single_event(NULL, &bounce_ev, 0, atomic, hop + 1);
554 if (result < 0) {
555 client->event_lost++;
556 return result;
557 }
558
559 return result;
560}
561
562
563/*
564 * rewrite the time-stamp of the event record with the curren time
565 * of the given queue.
566 * return non-zero if updated.
567 */
c7e0b5bf
TI		 568static int update_timestamp_of_queue(struct snd_seq_event *event,
569 int queue, int real_time)
1da177e4 570{
c7e0b5bf 571 struct snd_seq_queue *q;
1da177e4
LT		 572
573 q = queueptr(queue);
574 if (! q)
575 return 0;
576 event->queue = queue;
577 event->flags &= ~SNDRV_SEQ_TIME_STAMP_MASK;
578 if (real_time) {
579 event->time.time = snd_seq_timer_get_cur_time(q->timer);
580 event->flags |= SNDRV_SEQ_TIME_STAMP_REAL;
581 } else {
582 event->time.tick = snd_seq_timer_get_cur_tick(q->timer);
583 event->flags |= SNDRV_SEQ_TIME_STAMP_TICK;
584 }
585 queuefree(q);
586 return 1;
587}
588
589
590/*
591 * deliver an event to the specified destination.
592 * if filter is non-zero, client filter bitmap is tested.
593 *
594 * RETURN VALUE: 0 : if succeeded
595 * <0 : error
596 */
c7e0b5bf
TI		 597static int snd_seq_deliver_single_event(struct snd_seq_client *client,
598 struct snd_seq_event *event,
1da177e4
LT		 599 int filter, int atomic, int hop)
600{
c7e0b5bf
TI		 601 struct snd_seq_client *dest = NULL;
602 struct snd_seq_client_port *dest_port = NULL;
1da177e4
LT		 603 int result = -ENOENT;
604 int direct;
605
606 direct = snd_seq_ev_is_direct(event);
607
608 dest = get_event_dest_client(event, filter);
609 if (dest == NULL)
610 goto __skip;
611 dest_port = snd_seq_port_use_ptr(dest, event->dest.port);
612 if (dest_port == NULL)
613 goto __skip;
614
615 /* check permission */
616 if (! check_port_perm(dest_port, SNDRV_SEQ_PORT_CAP_WRITE)) {
617 result = -EPERM;
618 goto __skip;
619 }
620
621 if (dest_port->timestamping)
622 update_timestamp_of_queue(event, dest_port->time_queue,
623 dest_port->time_real);
624
625 switch (dest->type) {
626 case USER_CLIENT:
627 if (dest->data.user.fifo)
628 result = snd_seq_fifo_event_in(dest->data.user.fifo, event);
629 break;
630
631 case KERNEL_CLIENT:
632 if (dest_port->event_input == NULL)
633 break;
c7e0b5bf
TI		 634 result = dest_port->event_input(event, direct,
635 dest_port->private_data,
636 atomic, hop);
1da177e4
LT		 637 break;
638 default:
639 break;
640 }
641
642 __skip:
643 if (dest_port)
644 snd_seq_port_unlock(dest_port);
645 if (dest)
646 snd_seq_client_unlock(dest);
647
648 if (result < 0 && !direct) {
649 result = bounce_error_event(client, event, result, atomic, hop);
650 }
651 return result;
652}
653
654
655/*
656 * send the event to all subscribers:
657 */
c7e0b5bf
TI		 658static int deliver_to_subscribers(struct snd_seq_client *client,
659 struct snd_seq_event *event,
1da177e4
LT		 660 int atomic, int hop)
661{
c7e0b5bf 662 struct snd_seq_subscribers *subs;
1da177e4 663 int err = 0, num_ev = 0;
c7e0b5bf
TI		 664 struct snd_seq_event event_saved;
665 struct snd_seq_client_port *src_port;
c7e0b5bf 666 struct snd_seq_port_subs_info *grp;
1da177e4
LT		 667
668 src_port = snd_seq_port_use_ptr(client, event->source.port);
669 if (src_port == NULL)
670 return -EINVAL; /* invalid source port */
671 /* save original event record */
672 event_saved = *event;
673 grp = &src_port->c_src;
674
675 /* lock list */
676 if (atomic)
677 read_lock(&grp->list_lock);
678 else
679 down_read(&grp->list_mutex);
9244b2c3 680 list_for_each_entry(subs, &grp->list_head, src_list) {
e53ec492
TI		 681 /* both ports ready? */
682 if (atomic_read(&subs->ref_count) != 2)
683 continue;
1da177e4
LT		 684 event->dest = subs->info.dest;
685 if (subs->info.flags & SNDRV_SEQ_PORT_SUBS_TIMESTAMP)
686 /* convert time according to flag with subscription */
687 update_timestamp_of_queue(event, subs->info.queue,
688 subs->info.flags & SNDRV_SEQ_PORT_SUBS_TIME_REAL);
689 err = snd_seq_deliver_single_event(client, event,
690 0, atomic, hop);
691 if (err < 0)
692 break;
693 num_ev++;
694 /* restore original event record */
695 *event = event_saved;
696 }
697 if (atomic)
698 read_unlock(&grp->list_lock);
699 else
700 up_read(&grp->list_mutex);
701 *event = event_saved; /* restore */
702 snd_seq_port_unlock(src_port);
703 return (err < 0) ? err : num_ev;
704}
705
706
707#ifdef SUPPORT_BROADCAST
708/*
709 * broadcast to all ports:
710 */
c7e0b5bf
TI		 711static int port_broadcast_event(struct snd_seq_client *client,
712 struct snd_seq_event *event,
1da177e4
LT		 713 int atomic, int hop)
714{
715 int num_ev = 0, err = 0;
c7e0b5bf 716 struct snd_seq_client *dest_client;
9244b2c3 717 struct snd_seq_client_port *port;
1da177e4
LT		 718
719 dest_client = get_event_dest_client(event, SNDRV_SEQ_FILTER_BROADCAST);
720 if (dest_client == NULL)
721 return 0; /* no matching destination */
722
723 read_lock(&dest_client->ports_lock);
9244b2c3 724 list_for_each_entry(port, &dest_client->ports_list_head, list) {
1da177e4
LT		 725 event->dest.port = port->addr.port;
726 /* pass NULL as source client to avoid error bounce */
727 err = snd_seq_deliver_single_event(NULL, event,
728 SNDRV_SEQ_FILTER_BROADCAST,
729 atomic, hop);
730 if (err < 0)
731 break;
732 num_ev++;
733 }
734 read_unlock(&dest_client->ports_lock);
735 snd_seq_client_unlock(dest_client);
736 event->dest.port = SNDRV_SEQ_ADDRESS_BROADCAST; /* restore */
737 return (err < 0) ? err : num_ev;
738}
739
740/*
741 * send the event to all clients:
742 * if destination port is also ADDRESS_BROADCAST, deliver to all ports.
743 */
c7e0b5bf
TI		 744static int broadcast_event(struct snd_seq_client *client,
745 struct snd_seq_event *event, int atomic, int hop)
1da177e4
LT		 746{
747 int err = 0, num_ev = 0;
748 int dest;
c7e0b5bf 749 struct snd_seq_addr addr;
1da177e4
LT		 750
751 addr = event->dest; /* save */
752
753 for (dest = 0; dest < SNDRV_SEQ_MAX_CLIENTS; dest++) {
754 /* don't send to itself */
755 if (dest == client->number)
756 continue;
757 event->dest.client = dest;
758 event->dest.port = addr.port;
759 if (addr.port == SNDRV_SEQ_ADDRESS_BROADCAST)
760 err = port_broadcast_event(client, event, atomic, hop);
761 else
762 /* pass NULL as source client to avoid error bounce */
763 err = snd_seq_deliver_single_event(NULL, event,
764 SNDRV_SEQ_FILTER_BROADCAST,
765 atomic, hop);
766 if (err < 0)
767 break;
768 num_ev += err;
769 }
770 event->dest = addr; /* restore */
771 return (err < 0) ? err : num_ev;
772}
773
774
775/* multicast - not supported yet */
c7e0b5bf 776static int multicast_event(struct snd_seq_client *client, struct snd_seq_event *event,
1da177e4
LT		 777 int atomic, int hop)
778{
779 snd_printd("seq: multicast not supported yet.\n");
780 return 0; /* ignored */
781}
782#endif /* SUPPORT_BROADCAST */
783
784
785/* deliver an event to the destination port(s).
786 * if the event is to subscribers or broadcast, the event is dispatched
787 * to multiple targets.
788 *
789 * RETURN VALUE: n > 0 : the number of delivered events.
790 * n == 0 : the event was not passed to any client.
791 * n < 0 : error - event was not processed.
792 */
c7e0b5bf 793static int snd_seq_deliver_event(struct snd_seq_client *client, struct snd_seq_event *event,
1da177e4
LT		 794 int atomic, int hop)
795{
796 int result;
797
798 hop++;
799 if (hop >= SNDRV_SEQ_MAX_HOPS) {
800 snd_printd("too long delivery path (%d:%d->%d:%d)\n",
801 event->source.client, event->source.port,
802 event->dest.client, event->dest.port);
803 return -EMLINK;
804 }
805
806 if (event->queue == SNDRV_SEQ_ADDRESS_SUBSCRIBERS ||
807 event->dest.client == SNDRV_SEQ_ADDRESS_SUBSCRIBERS)
808 result = deliver_to_subscribers(client, event, atomic, hop);
809#ifdef SUPPORT_BROADCAST
810 else if (event->queue == SNDRV_SEQ_ADDRESS_BROADCAST ||
811 event->dest.client == SNDRV_SEQ_ADDRESS_BROADCAST)
812 result = broadcast_event(client, event, atomic, hop);
813 else if (event->dest.client >= SNDRV_SEQ_MAX_CLIENTS)
814 result = multicast_event(client, event, atomic, hop);
815 else if (event->dest.port == SNDRV_SEQ_ADDRESS_BROADCAST)
816 result = port_broadcast_event(client, event, atomic, hop);
817#endif
818 else
819 result = snd_seq_deliver_single_event(client, event, 0, atomic, hop);
820
821 return result;
822}
823
824/*
825 * dispatch an event cell:
826 * This function is called only from queue check routines in timer
827 * interrupts or after enqueued.
828 * The event cell shall be released or re-queued in this function.
829 *
830 * RETURN VALUE: n > 0 : the number of delivered events.
831 * n == 0 : the event was not passed to any client.
832 * n < 0 : error - event was not processed.
833 */
c7e0b5bf 834int snd_seq_dispatch_event(struct snd_seq_event_cell *cell, int atomic, int hop)
1da177e4 835{
c7e0b5bf 836 struct snd_seq_client *client;
1da177e4
LT		 837 int result;
838
7eaa943c
TI		 839 if (snd_BUG_ON(!cell))
840 return -EINVAL;
1da177e4
LT		 841
842 client = snd_seq_client_use_ptr(cell->event.source.client);
843 if (client == NULL) {
844 snd_seq_cell_free(cell); /* release this cell */
845 return -EINVAL;
846 }
847
848 if (cell->event.type == SNDRV_SEQ_EVENT_NOTE) {
849 /* NOTE event:
850 * the event cell is re-used as a NOTE-OFF event and
851 * enqueued again.
852 */
c7e0b5bf 853 struct snd_seq_event tmpev, *ev;
1da177e4
LT		 854
855 /* reserve this event to enqueue note-off later */
856 tmpev = cell->event;
857 tmpev.type = SNDRV_SEQ_EVENT_NOTEON;
858 result = snd_seq_deliver_event(client, &tmpev, atomic, hop);
859
860 /*
861 * This was originally a note event. We now re-use the
862 * cell for the note-off event.
863 */
864
865 ev = &cell->event;
866 ev->type = SNDRV_SEQ_EVENT_NOTEOFF;
867 ev->flags |= SNDRV_SEQ_PRIORITY_HIGH;
868
869 /* add the duration time */
870 switch (ev->flags & SNDRV_SEQ_TIME_STAMP_MASK) {
871 case SNDRV_SEQ_TIME_STAMP_TICK:
872 ev->time.tick += ev->data.note.duration;
873 break;
874 case SNDRV_SEQ_TIME_STAMP_REAL:
875 /* unit for duration is ms */
876 ev->time.time.tv_nsec += 1000000 * (ev->data.note.duration % 1000);
877 ev->time.time.tv_sec += ev->data.note.duration / 1000 +
878 ev->time.time.tv_nsec / 1000000000;
879 ev->time.time.tv_nsec %= 1000000000;
880 break;
881 }
882 ev->data.note.velocity = ev->data.note.off_velocity;
883
884 /* Now queue this cell as the note off event */
885 if (snd_seq_enqueue_event(cell, atomic, hop) < 0)
886 snd_seq_cell_free(cell); /* release this cell */
887
888 } else {
889 /* Normal events:
890 * event cell is freed after processing the event
891 */
892
893 result = snd_seq_deliver_event(client, &cell->event, atomic, hop);
894 snd_seq_cell_free(cell);
895 }
896
897 snd_seq_client_unlock(client);
898 return result;
899}
900
901
902/* Allocate a cell from client pool and enqueue it to queue:
903 * if pool is empty and blocking is TRUE, sleep until a new cell is
904 * available.
905 */
c7e0b5bf
TI		 906static int snd_seq_client_enqueue_event(struct snd_seq_client *client,
907 struct snd_seq_event *event,
1da177e4
LT		 908 struct file *file, int blocking,
909 int atomic, int hop)
910{
c7e0b5bf 911 struct snd_seq_event_cell *cell;
1da177e4
LT		 912 int err;
913
914 /* special queue values - force direct passing */
915 if (event->queue == SNDRV_SEQ_ADDRESS_SUBSCRIBERS) {
916 event->dest.client = SNDRV_SEQ_ADDRESS_SUBSCRIBERS;
917 event->queue = SNDRV_SEQ_QUEUE_DIRECT;
918 } else
919#ifdef SUPPORT_BROADCAST
920 if (event->queue == SNDRV_SEQ_ADDRESS_BROADCAST) {
921 event->dest.client = SNDRV_SEQ_ADDRESS_BROADCAST;
922 event->queue = SNDRV_SEQ_QUEUE_DIRECT;
923 }
924#endif
925 if (event->dest.client == SNDRV_SEQ_ADDRESS_SUBSCRIBERS) {
926 /* check presence of source port */
c7e0b5bf 927 struct snd_seq_client_port *src_port = snd_seq_port_use_ptr(client, event->source.port);
1da177e4
LT		 928 if (src_port == NULL)
929 return -EINVAL;
930 snd_seq_port_unlock(src_port);
931 }
932
933 /* direct event processing without enqueued */
934 if (snd_seq_ev_is_direct(event)) {
935 if (event->type == SNDRV_SEQ_EVENT_NOTE)
936 return -EINVAL; /* this event must be enqueued! */
937 return snd_seq_deliver_event(client, event, atomic, hop);
938 }
939
940 /* Not direct, normal queuing */
941 if (snd_seq_queue_is_used(event->queue, client->number) <= 0)
942 return -EINVAL; /* invalid queue */
943 if (! snd_seq_write_pool_allocated(client))
944 return -ENXIO; /* queue is not allocated */
945
946 /* allocate an event cell */
947 err = snd_seq_event_dup(client->pool, event, &cell, !blocking || atomic, file);
948 if (err < 0)
949 return err;
950
951 /* we got a cell. enqueue it. */
952 if ((err = snd_seq_enqueue_event(cell, atomic, hop)) < 0) {
953 snd_seq_cell_free(cell);
954 return err;
955 }
956
957 return 0;
958}
959
960
961/*
962 * check validity of event type and data length.
963 * return non-zero if invalid.
964 */
c7e0b5bf 965static int check_event_type_and_length(struct snd_seq_event *ev)
1da177e4
LT		 966{
967 switch (snd_seq_ev_length_type(ev)) {
968 case SNDRV_SEQ_EVENT_LENGTH_FIXED:
969 if (snd_seq_ev_is_variable_type(ev))
970 return -EINVAL;
971 break;
972 case SNDRV_SEQ_EVENT_LENGTH_VARIABLE:
973 if (! snd_seq_ev_is_variable_type(ev) ||
974 (ev->data.ext.len & ~SNDRV_SEQ_EXT_MASK) >= SNDRV_SEQ_MAX_EVENT_LEN)
975 return -EINVAL;
976 break;
977 case SNDRV_SEQ_EVENT_LENGTH_VARUSR:
e5723b41 978 if (! snd_seq_ev_is_direct(ev))
1da177e4
LT		 979 return -EINVAL;
980 break;
981 }
982 return 0;
983}
984
985
986/* handle write() */
987/* possible error values:
988 * -ENXIO invalid client or file open mode
989 * -ENOMEM malloc failed
990 * -EFAULT seg. fault during copy from user space
991 * -EINVAL invalid event
992 * -EAGAIN no space in output pool
993 * -EINTR interrupts while sleep
994 * -EMLINK too many hops
995 * others depends on return value from driver callback
996 */
c7e0b5bf
TI		 997static ssize_t snd_seq_write(struct file *file, const char __user *buf,
998 size_t count, loff_t *offset)
1da177e4 999{
c7e0b5bf 1000 struct snd_seq_client *client = file->private_data;
1da177e4
LT		 1001 int written = 0, len;
1002 int err = -EINVAL;
c7e0b5bf 1003 struct snd_seq_event event;
1da177e4
LT		 1004
1005 if (!(snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_OUTPUT))
1006 return -ENXIO;
1007
1008 /* check client structures are in place */
7eaa943c
TI		 1009 if (snd_BUG_ON(!client))
1010 return -ENXIO;
1da177e4
LT		 1011
1012 if (!client->accept_output || client->pool == NULL)
1013 return -ENXIO;
1014
1015 /* allocate the pool now if the pool is not allocated yet */
1016 if (client->pool->size > 0 && !snd_seq_write_pool_allocated(client)) {
1017 if (snd_seq_pool_init(client->pool) < 0)
1018 return -ENOMEM;
1019 }
1020
1021 /* only process whole events */
c7e0b5bf 1022 while (count >= sizeof(struct snd_seq_event)) {
1da177e4
LT		 1023 /* Read in the event header from the user */
1024 len = sizeof(event);
1025 if (copy_from_user(&event, buf, len)) {
1026 err = -EFAULT;
1027 break;
1028 }
1029 event.source.client = client->number; /* fill in client number */
1030 /* Check for extension data length */
1031 if (check_event_type_and_length(&event)) {
1032 err = -EINVAL;
1033 break;
1034 }
1035
1036 /* check for special events */
1037 if (event.type == SNDRV_SEQ_EVENT_NONE)
1038 goto __skip_event;
1039 else if (snd_seq_ev_is_reserved(&event)) {
1040 err = -EINVAL;
1041 break;
1042 }
1043
1044 if (snd_seq_ev_is_variable(&event)) {
1045 int extlen = event.data.ext.len & ~SNDRV_SEQ_EXT_MASK;
1046 if ((size_t)(extlen + len) > count) {
1047 /* back out, will get an error this time or next */
1048 err = -EINVAL;
1049 break;
1050 }
1051 /* set user space pointer */
1052 event.data.ext.len = extlen | SNDRV_SEQ_EXT_USRPTR;
4d23359b 1053 event.data.ext.ptr = (char __force *)buf
c7e0b5bf 1054 + sizeof(struct snd_seq_event);
1da177e4
LT		 1055 len += extlen; /* increment data length */
1056 } else {
1057#ifdef CONFIG_COMPAT
1058 if (client->convert32 && snd_seq_ev_is_varusr(&event)) {
fea952e5 1059 void *ptr = (void __force *)compat_ptr(event.data.raw32.d[1]);
1da177e4
LT		 1060 event.data.ext.ptr = ptr;
1061 }
1062#endif
1063 }
1064
1065 /* ok, enqueue it */
1066 err = snd_seq_client_enqueue_event(client, &event, file,
1067 !(file->f_flags & O_NONBLOCK),
1068 0, 0);
1069 if (err < 0)
1070 break;
1071
1072 __skip_event:
1073 /* Update pointers and counts */
1074 count -= len;
1075 buf += len;
1076 written += len;
1077 }
1078
1079 return written ? written : err;
1080}
1081
1082
1083/*
1084 * handle polling
1085 */
1086static unsigned int snd_seq_poll(struct file *file, poll_table * wait)
1087{
c7e0b5bf 1088 struct snd_seq_client *client = file->private_data;
1da177e4
LT		 1089 unsigned int mask = 0;
1090
1091 /* check client structures are in place */
7eaa943c
TI		 1092 if (snd_BUG_ON(!client))
1093 return -ENXIO;
1da177e4
LT		 1094
1095 if ((snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_INPUT) &&
1096 client->data.user.fifo) {
1097
1098 /* check if data is available in the outqueue */
1099 if (snd_seq_fifo_poll_wait(client->data.user.fifo, file, wait))
1100 mask |= POLLIN | POLLRDNORM;
1101 }
1102
1103 if (snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_OUTPUT) {
1104
1105 /* check if data is available in the pool */
1106 if (!snd_seq_write_pool_allocated(client) ||
1107 snd_seq_pool_poll_wait(client->pool, file, wait))
1108 mask |= POLLOUT | POLLWRNORM;
1109 }
1110
1111 return mask;
1112}
1113
1114
1115/*-----------------------------------------------------*/
1116
1117
1118/* SYSTEM_INFO ioctl() */
c7e0b5bf 1119static int snd_seq_ioctl_system_info(struct snd_seq_client *client, void __user *arg)
1da177e4 1120{
c7e0b5bf 1121 struct snd_seq_system_info info;
1da177e4
LT		 1122
1123 memset(&info, 0, sizeof(info));
1124 /* fill the info fields */
1125 info.queues = SNDRV_SEQ_MAX_QUEUES;
1126 info.clients = SNDRV_SEQ_MAX_CLIENTS;
1127 info.ports = 256; /* fixed limit */
1128 info.channels = 256; /* fixed limit */
1129 info.cur_clients = client_usage.cur;
1130 info.cur_queues = snd_seq_queue_get_cur_queues();
1131
1132 if (copy_to_user(arg, &info, sizeof(info)))
1133 return -EFAULT;
1134 return 0;
1135}
1136
1137
1138/* RUNNING_MODE ioctl() */
c7e0b5bf 1139static int snd_seq_ioctl_running_mode(struct snd_seq_client *client, void __user *arg)
1da177e4 1140{
c7e0b5bf
TI		 1141 struct snd_seq_running_info info;
1142 struct snd_seq_client *cptr;
1da177e4
LT		 1143 int err = 0;
1144
1145 if (copy_from_user(&info, arg, sizeof(info)))
1146 return -EFAULT;
1147
1148 /* requested client number */
1149 cptr = snd_seq_client_use_ptr(info.client);
1150 if (cptr == NULL)
1151 return -ENOENT; /* don't change !!! */
1152
1153#ifdef SNDRV_BIG_ENDIAN
1154 if (! info.big_endian) {
1155 err = -EINVAL;
1156 goto __err;
1157 }
1158#else
1159 if (info.big_endian) {
1160 err = -EINVAL;
1161 goto __err;
1162 }
1163
1164#endif
1165 if (info.cpu_mode > sizeof(long)) {
1166 err = -EINVAL;
1167 goto __err;
1168 }
1169 cptr->convert32 = (info.cpu_mode < sizeof(long));
1170 __err:
1171 snd_seq_client_unlock(cptr);
1172 return err;
1173}
1174
1175/* CLIENT_INFO ioctl() */
c7e0b5bf
TI		 1176static void get_client_info(struct snd_seq_client *cptr,
1177 struct snd_seq_client_info *info)
1da177e4
LT		 1178{
1179 info->client = cptr->number;
1180
1181 /* fill the info fields */
1182 info->type = cptr->type;
1183 strcpy(info->name, cptr->name);
1184 info->filter = cptr->filter;
1185 info->event_lost = cptr->event_lost;
1186 memcpy(info->event_filter, cptr->event_filter, 32);
1187 info->num_ports = cptr->num_ports;
1188 memset(info->reserved, 0, sizeof(info->reserved));
1189}
1190
c7e0b5bf
TI		 1191static int snd_seq_ioctl_get_client_info(struct snd_seq_client *client,
1192 void __user *arg)
1da177e4 1193{
c7e0b5bf
TI		 1194 struct snd_seq_client *cptr;
1195 struct snd_seq_client_info client_info;
1da177e4
LT		 1196
1197 if (copy_from_user(&client_info, arg, sizeof(client_info)))
1198 return -EFAULT;
1199
1200 /* requested client number */
1201 cptr = snd_seq_client_use_ptr(client_info.client);
1202 if (cptr == NULL)
1203 return -ENOENT; /* don't change !!! */
1204
1205 get_client_info(cptr, &client_info);
1206 snd_seq_client_unlock(cptr);
1207
1208 if (copy_to_user(arg, &client_info, sizeof(client_info)))
1209 return -EFAULT;
1210 return 0;
1211}
1212
1213
1214/* CLIENT_INFO ioctl() */
c7e0b5bf
TI		 1215static int snd_seq_ioctl_set_client_info(struct snd_seq_client *client,
1216 void __user *arg)
1da177e4 1217{
c7e0b5bf 1218 struct snd_seq_client_info client_info;
1da177e4
LT		 1219
1220 if (copy_from_user(&client_info, arg, sizeof(client_info)))
1221 return -EFAULT;
1222
1223 /* it is not allowed to set the info fields for an another client */
1224 if (client->number != client_info.client)
1225 return -EPERM;
1226 /* also client type must be set now */
1227 if (client->type != client_info.type)
1228 return -EINVAL;
1229
1230 /* fill the info fields */
1231 if (client_info.name[0])
1232 strlcpy(client->name, client_info.name, sizeof(client->name));
1233
1234 client->filter = client_info.filter;
1235 client->event_lost = client_info.event_lost;
1236 memcpy(client->event_filter, client_info.event_filter, 32);
1237
1238 return 0;
1239}
1240
1241
1242/*
1243 * CREATE PORT ioctl()
1244 */
c7e0b5bf
TI		 1245static int snd_seq_ioctl_create_port(struct snd_seq_client *client,
1246 void __user *arg)
1da177e4 1247{
c7e0b5bf
TI		 1248 struct snd_seq_client_port *port;
1249 struct snd_seq_port_info info;
1250 struct snd_seq_port_callback *callback;
1da177e4
LT		 1251
1252 if (copy_from_user(&info, arg, sizeof(info)))
1253 return -EFAULT;
1254
1255 /* it is not allowed to create the port for an another client */
1256 if (info.addr.client != client->number)
1257 return -EPERM;
1258
1259 port = snd_seq_create_port(client, (info.flags & SNDRV_SEQ_PORT_FLG_GIVEN_PORT) ? info.addr.port : -1);
1260 if (port == NULL)
1261 return -ENOMEM;
1262
1263 if (client->type == USER_CLIENT && info.kernel) {
1264 snd_seq_delete_port(client, port->addr.port);
1265 return -EINVAL;
1266 }
1267 if (client->type == KERNEL_CLIENT) {
1268 if ((callback = info.kernel) != NULL) {
1269 if (callback->owner)
1270 port->owner = callback->owner;
1271 port->private_data = callback->private_data;
1272 port->private_free = callback->private_free;
1273 port->callback_all = callback->callback_all;
1274 port->event_input = callback->event_input;
1275 port->c_src.open = callback->subscribe;
1276 port->c_src.close = callback->unsubscribe;
1277 port->c_dest.open = callback->use;
1278 port->c_dest.close = callback->unuse;
1279 }
1280 }
1281
1282 info.addr = port->addr;
1283
1284 snd_seq_set_port_info(port, &info);
1285 snd_seq_system_client_ev_port_start(port->addr.client, port->addr.port);
1286
1287 if (copy_to_user(arg, &info, sizeof(info)))
1288 return -EFAULT;
1289
1290 return 0;
1291}
1292
1293/*
1294 * DELETE PORT ioctl()
1295 */
c7e0b5bf
TI		 1296static int snd_seq_ioctl_delete_port(struct snd_seq_client *client,
1297 void __user *arg)
1da177e4 1298{
c7e0b5bf 1299 struct snd_seq_port_info info;
1da177e4
LT		 1300 int err;
1301
1302 /* set passed parameters */
1303 if (copy_from_user(&info, arg, sizeof(info)))
1304 return -EFAULT;
1305
1306 /* it is not allowed to remove the port for an another client */
1307 if (info.addr.client != client->number)
1308 return -EPERM;
1309
1310 err = snd_seq_delete_port(client, info.addr.port);
1311 if (err >= 0)
1312 snd_seq_system_client_ev_port_exit(client->number, info.addr.port);
1313 return err;
1314}
1315
1316
1317/*
1318 * GET_PORT_INFO ioctl() (on any client)
1319 */
c7e0b5bf
TI		 1320static int snd_seq_ioctl_get_port_info(struct snd_seq_client *client,
1321 void __user *arg)
1da177e4 1322{
c7e0b5bf
TI		 1323 struct snd_seq_client *cptr;
1324 struct snd_seq_client_port *port;
1325 struct snd_seq_port_info info;
1da177e4
LT		 1326
1327 if (copy_from_user(&info, arg, sizeof(info)))
1328 return -EFAULT;
1329 cptr = snd_seq_client_use_ptr(info.addr.client);
1330 if (cptr == NULL)
1331 return -ENXIO;
1332
1333 port = snd_seq_port_use_ptr(cptr, info.addr.port);
1334 if (port == NULL) {
1335 snd_seq_client_unlock(cptr);
1336 return -ENOENT; /* don't change */
1337 }
1338
1339 /* get port info */
1340 snd_seq_get_port_info(port, &info);
1341 snd_seq_port_unlock(port);
1342 snd_seq_client_unlock(cptr);
1343
1344 if (copy_to_user(arg, &info, sizeof(info)))
1345 return -EFAULT;
1346 return 0;
1347}
1348
1349
1350/*
1351 * SET_PORT_INFO ioctl() (only ports on this/own client)
1352 */
c7e0b5bf
TI		 1353static int snd_seq_ioctl_set_port_info(struct snd_seq_client *client,
1354 void __user *arg)
1da177e4 1355{
c7e0b5bf
TI		 1356 struct snd_seq_client_port *port;
1357 struct snd_seq_port_info info;
1da177e4
LT		 1358
1359 if (copy_from_user(&info, arg, sizeof(info)))
1360 return -EFAULT;
1361
1362 if (info.addr.client != client->number) /* only set our own ports ! */
1363 return -EPERM;
1364 port = snd_seq_port_use_ptr(client, info.addr.port);
1365 if (port) {
1366 snd_seq_set_port_info(port, &info);
1367 snd_seq_port_unlock(port);
1368 }
1369 return 0;
1370}
1371
1372
1373/*
1374 * port subscription (connection)
1375 */
1376#define PERM_RD (SNDRV_SEQ_PORT_CAP_READ|SNDRV_SEQ_PORT_CAP_SUBS_READ)
1377#define PERM_WR (SNDRV_SEQ_PORT_CAP_WRITE|SNDRV_SEQ_PORT_CAP_SUBS_WRITE)
1378
c7e0b5bf
TI		 1379static int check_subscription_permission(struct snd_seq_client *client,
1380 struct snd_seq_client_port *sport,
1381 struct snd_seq_client_port *dport,
1382 struct snd_seq_port_subscribe *subs)
1da177e4
LT		 1383{
1384 if (client->number != subs->sender.client &&
1385 client->number != subs->dest.client) {
1386 /* connection by third client - check export permission */
1387 if (check_port_perm(sport, SNDRV_SEQ_PORT_CAP_NO_EXPORT))
1388 return -EPERM;
1389 if (check_port_perm(dport, SNDRV_SEQ_PORT_CAP_NO_EXPORT))
1390 return -EPERM;
1391 }
1392
1393 /* check read permission */
1394 /* if sender or receiver is the subscribing client itself,
1395 * no permission check is necessary
1396 */
1397 if (client->number != subs->sender.client) {
1398 if (! check_port_perm(sport, PERM_RD))
1399 return -EPERM;
1400 }
1401 /* check write permission */
1402 if (client->number != subs->dest.client) {
1403 if (! check_port_perm(dport, PERM_WR))
1404 return -EPERM;
1405 }
1406 return 0;
1407}
1408
1409/*
1410 * send an subscription notify event to user client:
1411 * client must be user client.
1412 */
1413int snd_seq_client_notify_subscription(int client, int port,
c7e0b5bf
TI		 1414 struct snd_seq_port_subscribe *info,
1415 int evtype)
1da177e4 1416{
c7e0b5bf 1417 struct snd_seq_event event;
1da177e4
LT		 1418
1419 memset(&event, 0, sizeof(event));
1420 event.type = evtype;
1421 event.data.connect.dest = info->dest;
1422 event.data.connect.sender = info->sender;
1423
1424 return snd_seq_system_notify(client, port, &event); /* non-atomic */
1425}
1426
1427
1428/*
1429 * add to port's subscription list IOCTL interface
1430 */
c7e0b5bf
TI		 1431static int snd_seq_ioctl_subscribe_port(struct snd_seq_client *client,
1432 void __user *arg)
1da177e4
LT		 1433{
1434 int result = -EINVAL;
c7e0b5bf
TI		 1435 struct snd_seq_client *receiver = NULL, *sender = NULL;
1436 struct snd_seq_client_port *sport = NULL, *dport = NULL;
1437 struct snd_seq_port_subscribe subs;
1da177e4
LT		 1438
1439 if (copy_from_user(&subs, arg, sizeof(subs)))
1440 return -EFAULT;
1441
1442 if ((receiver = snd_seq_client_use_ptr(subs.dest.client)) == NULL)
1443 goto __end;
1444 if ((sender = snd_seq_client_use_ptr(subs.sender.client)) == NULL)
1445 goto __end;
1446 if ((sport = snd_seq_port_use_ptr(sender, subs.sender.port)) == NULL)
1447 goto __end;
1448 if ((dport = snd_seq_port_use_ptr(receiver, subs.dest.port)) == NULL)
1449 goto __end;
1450
1451 result = check_subscription_permission(client, sport, dport, &subs);
1452 if (result < 0)
1453 goto __end;
1454
1455 /* connect them */
1456 result = snd_seq_port_connect(client, sender, sport, receiver, dport, &subs);
1457 if (! result) /* broadcast announce */
1458 snd_seq_client_notify_subscription(SNDRV_SEQ_ADDRESS_SUBSCRIBERS, 0,
1459 &subs, SNDRV_SEQ_EVENT_PORT_SUBSCRIBED);
1460 __end:
1461 if (sport)
1462 snd_seq_port_unlock(sport);
1463 if (dport)
1464 snd_seq_port_unlock(dport);
1465 if (sender)
1466 snd_seq_client_unlock(sender);
1467 if (receiver)
1468 snd_seq_client_unlock(receiver);
1469 return result;
1470}
1471
1472
1473/*
1474 * remove from port's subscription list
1475 */
c7e0b5bf
TI		 1476static int snd_seq_ioctl_unsubscribe_port(struct snd_seq_client *client,
1477 void __user *arg)
1da177e4
LT		 1478{
1479 int result = -ENXIO;
c7e0b5bf
TI		 1480 struct snd_seq_client *receiver = NULL, *sender = NULL;
1481 struct snd_seq_client_port *sport = NULL, *dport = NULL;
1482 struct snd_seq_port_subscribe subs;
1da177e4
LT		 1483
1484 if (copy_from_user(&subs, arg, sizeof(subs)))
1485 return -EFAULT;
1486
1487 if ((receiver = snd_seq_client_use_ptr(subs.dest.client)) == NULL)
1488 goto __end;
1489 if ((sender = snd_seq_client_use_ptr(subs.sender.client)) == NULL)
1490 goto __end;
1491 if ((sport = snd_seq_port_use_ptr(sender, subs.sender.port)) == NULL)
1492 goto __end;
1493 if ((dport = snd_seq_port_use_ptr(receiver, subs.dest.port)) == NULL)
1494 goto __end;
1495
1496 result = check_subscription_permission(client, sport, dport, &subs);
1497 if (result < 0)
1498 goto __end;
1499
1500 result = snd_seq_port_disconnect(client, sender, sport, receiver, dport, &subs);
1501 if (! result) /* broadcast announce */
1502 snd_seq_client_notify_subscription(SNDRV_SEQ_ADDRESS_SUBSCRIBERS, 0,
1503 &subs, SNDRV_SEQ_EVENT_PORT_UNSUBSCRIBED);
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() */
c7e0b5bf
TI		 1518static int snd_seq_ioctl_create_queue(struct snd_seq_client *client,
1519 void __user *arg)
1da177e4 1520{
c7e0b5bf 1521 struct snd_seq_queue_info info;
1da177e4 1522 int result;
c7e0b5bf 1523 struct snd_seq_queue *q;
1da177e4
LT		 1524
1525 if (copy_from_user(&info, arg, sizeof(info)))
1526 return -EFAULT;
1527
1528 result = snd_seq_queue_alloc(client->number, info.locked, info.flags);
1529 if (result < 0)
1530 return result;
1531
1532 q = queueptr(result);
1533 if (q == NULL)
1534 return -EINVAL;
1535
1536 info.queue = q->queue;
1537 info.locked = q->locked;
1538 info.owner = q->owner;
1539
1540 /* set queue name */
1541 if (! info.name[0])
1542 snprintf(info.name, sizeof(info.name), "Queue-%d", q->queue);
1543 strlcpy(q->name, info.name, sizeof(q->name));
1544 queuefree(q);
1545
1546 if (copy_to_user(arg, &info, sizeof(info)))
1547 return -EFAULT;
1548
1549 return 0;
1550}
1551
1552/* DELETE_QUEUE ioctl() */
c7e0b5bf
TI		 1553static int snd_seq_ioctl_delete_queue(struct snd_seq_client *client,
1554 void __user *arg)
1da177e4 1555{
c7e0b5bf 1556 struct snd_seq_queue_info info;
1da177e4
LT		 1557
1558 if (copy_from_user(&info, arg, sizeof(info)))
1559 return -EFAULT;
1560
1561 return snd_seq_queue_delete(client->number, info.queue);
1562}
1563
1564/* GET_QUEUE_INFO ioctl() */
c7e0b5bf
TI		 1565static int snd_seq_ioctl_get_queue_info(struct snd_seq_client *client,
1566 void __user *arg)
1da177e4 1567{
c7e0b5bf
TI		 1568 struct snd_seq_queue_info info;
1569 struct snd_seq_queue *q;
1da177e4
LT		 1570
1571 if (copy_from_user(&info, arg, sizeof(info)))
1572 return -EFAULT;
1573
1574 q = queueptr(info.queue);
1575 if (q == NULL)
1576 return -EINVAL;
1577
1578 memset(&info, 0, sizeof(info));
1579 info.queue = q->queue;
1580 info.owner = q->owner;
1581 info.locked = q->locked;
1582 strlcpy(info.name, q->name, sizeof(info.name));
1583 queuefree(q);
1584
1585 if (copy_to_user(arg, &info, sizeof(info)))
1586 return -EFAULT;
1587
1588 return 0;
1589}
1590
1591/* SET_QUEUE_INFO ioctl() */
c7e0b5bf
TI		 1592static int snd_seq_ioctl_set_queue_info(struct snd_seq_client *client,
1593 void __user *arg)
1da177e4 1594{
c7e0b5bf
TI		 1595 struct snd_seq_queue_info info;
1596 struct snd_seq_queue *q;
1da177e4
LT		 1597
1598 if (copy_from_user(&info, arg, sizeof(info)))
1599 return -EFAULT;
1600
1601 if (info.owner != client->number)
1602 return -EINVAL;
1603
1604 /* change owner/locked permission */
1605 if (snd_seq_queue_check_access(info.queue, client->number)) {
1606 if (snd_seq_queue_set_owner(info.queue, client->number, info.locked) < 0)
1607 return -EPERM;
1608 if (info.locked)
1609 snd_seq_queue_use(info.queue, client->number, 1);
1610 } else {
1611 return -EPERM;
1612 }
1613
1614 q = queueptr(info.queue);
1615 if (! q)
1616 return -EINVAL;
1617 if (q->owner != client->number) {
1618 queuefree(q);
1619 return -EPERM;
1620 }
1621 strlcpy(q->name, info.name, sizeof(q->name));
1622 queuefree(q);
1623
1624 return 0;
1625}
1626
1627/* GET_NAMED_QUEUE ioctl() */
c7e0b5bf 1628static int snd_seq_ioctl_get_named_queue(struct snd_seq_client *client, void __user *arg)
1da177e4 1629{
c7e0b5bf
TI		 1630 struct snd_seq_queue_info info;
1631 struct snd_seq_queue *q;
1da177e4
LT		 1632
1633 if (copy_from_user(&info, arg, sizeof(info)))
1634 return -EFAULT;
1635
1636 q = snd_seq_queue_find_name(info.name);
1637 if (q == NULL)
1638 return -EINVAL;
1639 info.queue = q->queue;
1640 info.owner = q->owner;
1641 info.locked = q->locked;
1642 queuefree(q);
1643
1644 if (copy_to_user(arg, &info, sizeof(info)))
1645 return -EFAULT;
1646
1647 return 0;
1648}
1649
1650/* GET_QUEUE_STATUS ioctl() */
c7e0b5bf
TI		 1651static int snd_seq_ioctl_get_queue_status(struct snd_seq_client *client,
1652 void __user *arg)
1da177e4 1653{
c7e0b5bf
TI		 1654 struct snd_seq_queue_status status;
1655 struct snd_seq_queue *queue;
1656 struct snd_seq_timer *tmr;
1da177e4
LT		 1657
1658 if (copy_from_user(&status, arg, sizeof(status)))
1659 return -EFAULT;
1660
1661 queue = queueptr(status.queue);
1662 if (queue == NULL)
1663 return -EINVAL;
1664 memset(&status, 0, sizeof(status));
1665 status.queue = queue->queue;
1666
1667 tmr = queue->timer;
1668 status.events = queue->tickq->cells + queue->timeq->cells;
1669
1670 status.time = snd_seq_timer_get_cur_time(tmr);
1671 status.tick = snd_seq_timer_get_cur_tick(tmr);
1672
1673 status.running = tmr->running;
1674
1675 status.flags = queue->flags;
1676 queuefree(queue);
1677
1678 if (copy_to_user(arg, &status, sizeof(status)))
1679 return -EFAULT;
1680 return 0;
1681}
1682
1683
1684/* GET_QUEUE_TEMPO ioctl() */
c7e0b5bf
TI		 1685static int snd_seq_ioctl_get_queue_tempo(struct snd_seq_client *client,
1686 void __user *arg)
1da177e4 1687{
c7e0b5bf
TI		 1688 struct snd_seq_queue_tempo tempo;
1689 struct snd_seq_queue *queue;
1690 struct snd_seq_timer *tmr;
1da177e4
LT		 1691
1692 if (copy_from_user(&tempo, arg, sizeof(tempo)))
1693 return -EFAULT;
1694
1695 queue = queueptr(tempo.queue);
1696 if (queue == NULL)
1697 return -EINVAL;
1698 memset(&tempo, 0, sizeof(tempo));
1699 tempo.queue = queue->queue;
1700
1701 tmr = queue->timer;
1702
1703 tempo.tempo = tmr->tempo;
1704 tempo.ppq = tmr->ppq;
1705 tempo.skew_value = tmr->skew;
1706 tempo.skew_base = tmr->skew_base;
1707 queuefree(queue);
1708
1709 if (copy_to_user(arg, &tempo, sizeof(tempo)))
1710 return -EFAULT;
1711 return 0;
1712}
1713
1714
1715/* SET_QUEUE_TEMPO ioctl() */
c7e0b5bf 1716int snd_seq_set_queue_tempo(int client, struct snd_seq_queue_tempo *tempo)
1da177e4
LT		 1717{
1718 if (!snd_seq_queue_check_access(tempo->queue, client))
1719 return -EPERM;
1720 return snd_seq_queue_timer_set_tempo(tempo->queue, client, tempo);
1721}
1722
91715ed9
TI		 1723EXPORT_SYMBOL(snd_seq_set_queue_tempo);
1724
c7e0b5bf
TI		 1725static int snd_seq_ioctl_set_queue_tempo(struct snd_seq_client *client,
1726 void __user *arg)
1da177e4
LT		 1727{
1728 int result;
c7e0b5bf 1729 struct snd_seq_queue_tempo tempo;
1da177e4
LT		 1730
1731 if (copy_from_user(&tempo, arg, sizeof(tempo)))
1732 return -EFAULT;
1733
1734 result = snd_seq_set_queue_tempo(client->number, &tempo);
1735 return result < 0 ? result : 0;
1736}
1737
1738
1739/* GET_QUEUE_TIMER ioctl() */
c7e0b5bf
TI		 1740static int snd_seq_ioctl_get_queue_timer(struct snd_seq_client *client,
1741 void __user *arg)
1da177e4 1742{
c7e0b5bf
TI		 1743 struct snd_seq_queue_timer timer;
1744 struct snd_seq_queue *queue;
1745 struct snd_seq_timer *tmr;
1da177e4
LT		 1746
1747 if (copy_from_user(&timer, arg, sizeof(timer)))
1748 return -EFAULT;
1749
1750 queue = queueptr(timer.queue);
1751 if (queue == NULL)
1752 return -EINVAL;
1753
1a60d4c5 1754 if (mutex_lock_interruptible(&queue->timer_mutex)) {
1da177e4
LT		 1755 queuefree(queue);
1756 return -ERESTARTSYS;
1757 }
1758 tmr = queue->timer;
1759 memset(&timer, 0, sizeof(timer));
1760 timer.queue = queue->queue;
1761
1762 timer.type = tmr->type;
1763 if (tmr->type == SNDRV_SEQ_TIMER_ALSA) {
1764 timer.u.alsa.id = tmr->alsa_id;
1765 timer.u.alsa.resolution = tmr->preferred_resolution;
1766 }
1a60d4c5 1767 mutex_unlock(&queue->timer_mutex);
1da177e4
LT		 1768 queuefree(queue);
1769
1770 if (copy_to_user(arg, &timer, sizeof(timer)))
1771 return -EFAULT;
1772 return 0;
1773}
1774
1775
1776/* SET_QUEUE_TIMER ioctl() */
c7e0b5bf
TI		 1777static int snd_seq_ioctl_set_queue_timer(struct snd_seq_client *client,
1778 void __user *arg)
1da177e4
LT		 1779{
1780 int result = 0;
c7e0b5bf 1781 struct snd_seq_queue_timer timer;
1da177e4
LT		 1782
1783 if (copy_from_user(&timer, arg, sizeof(timer)))
1784 return -EFAULT;
1785
1786 if (timer.type != SNDRV_SEQ_TIMER_ALSA)
1787 return -EINVAL;
1788
1789 if (snd_seq_queue_check_access(timer.queue, client->number)) {
c7e0b5bf
TI		 1790 struct snd_seq_queue *q;
1791 struct snd_seq_timer *tmr;
1da177e4
LT		 1792
1793 q = queueptr(timer.queue);
1794 if (q == NULL)
1795 return -ENXIO;
1a60d4c5 1796 if (mutex_lock_interruptible(&q->timer_mutex)) {
1da177e4
LT		 1797 queuefree(q);
1798 return -ERESTARTSYS;
1799 }
1800 tmr = q->timer;
1801 snd_seq_queue_timer_close(timer.queue);
1802 tmr->type = timer.type;
1803 if (tmr->type == SNDRV_SEQ_TIMER_ALSA) {
1804 tmr->alsa_id = timer.u.alsa.id;
1805 tmr->preferred_resolution = timer.u.alsa.resolution;
1806 }
1807 result = snd_seq_queue_timer_open(timer.queue);
1a60d4c5 1808 mutex_unlock(&q->timer_mutex);
1da177e4
LT		 1809 queuefree(q);
1810 } else {
1811 return -EPERM;
1812 }
1813
1814 return result;
1815}
1816
1817
1818/* GET_QUEUE_CLIENT ioctl() */
c7e0b5bf
TI		 1819static int snd_seq_ioctl_get_queue_client(struct snd_seq_client *client,
1820 void __user *arg)
1da177e4 1821{
c7e0b5bf 1822 struct snd_seq_queue_client info;
1da177e4
LT		 1823 int used;
1824
1825 if (copy_from_user(&info, arg, sizeof(info)))
1826 return -EFAULT;
1827
1828 used = snd_seq_queue_is_used(info.queue, client->number);
1829 if (used < 0)
1830 return -EINVAL;
1831 info.used = used;
1832 info.client = client->number;
1833
1834 if (copy_to_user(arg, &info, sizeof(info)))
1835 return -EFAULT;
1836 return 0;
1837}
1838
1839
1840/* SET_QUEUE_CLIENT ioctl() */
c7e0b5bf
TI		 1841static int snd_seq_ioctl_set_queue_client(struct snd_seq_client *client,
1842 void __user *arg)
1da177e4
LT		 1843{
1844 int err;
c7e0b5bf 1845 struct snd_seq_queue_client info;
1da177e4
LT		 1846
1847 if (copy_from_user(&info, arg, sizeof(info)))
1848 return -EFAULT;
1849
1850 if (info.used >= 0) {
1851 err = snd_seq_queue_use(info.queue, client->number, info.used);
1852 if (err < 0)
1853 return err;
1854 }
1855
1856 return snd_seq_ioctl_get_queue_client(client, arg);
1857}
1858
1859
1860/* GET_CLIENT_POOL ioctl() */
c7e0b5bf
TI		 1861static int snd_seq_ioctl_get_client_pool(struct snd_seq_client *client,
1862 void __user *arg)
1da177e4 1863{
c7e0b5bf
TI		 1864 struct snd_seq_client_pool info;
1865 struct snd_seq_client *cptr;
1da177e4
LT		 1866
1867 if (copy_from_user(&info, arg, sizeof(info)))
1868 return -EFAULT;
1869
1870 cptr = snd_seq_client_use_ptr(info.client);
1871 if (cptr == NULL)
1872 return -ENOENT;
1873 memset(&info, 0, sizeof(info));
1874 info.output_pool = cptr->pool->size;
1875 info.output_room = cptr->pool->room;
1876 info.output_free = info.output_pool;
e64d2e36 1877 info.output_free = snd_seq_unused_cells(cptr->pool);
1da177e4
LT		 1878 if (cptr->type == USER_CLIENT) {
1879 info.input_pool = cptr->data.user.fifo_pool_size;
1880 info.input_free = info.input_pool;
1881 if (cptr->data.user.fifo)
1882 info.input_free = snd_seq_unused_cells(cptr->data.user.fifo->pool);
1883 } else {
1884 info.input_pool = 0;
1885 info.input_free = 0;
1886 }
1887 snd_seq_client_unlock(cptr);
1888
1889 if (copy_to_user(arg, &info, sizeof(info)))
1890 return -EFAULT;
1891 return 0;
1892}
1893
1894/* SET_CLIENT_POOL ioctl() */
c7e0b5bf
TI		 1895static int snd_seq_ioctl_set_client_pool(struct snd_seq_client *client,
1896 void __user *arg)
1da177e4 1897{
c7e0b5bf 1898 struct snd_seq_client_pool info;
1da177e4
LT		 1899 int rc;
1900
1901 if (copy_from_user(&info, arg, sizeof(info)))
1902 return -EFAULT;
1903
1904 if (client->number != info.client)
1905 return -EINVAL; /* can't change other clients */
1906
1907 if (info.output_pool >= 1 && info.output_pool <= SNDRV_SEQ_MAX_EVENTS &&
1908 (! snd_seq_write_pool_allocated(client) ||
1909 info.output_pool != client->pool->size)) {
1910 if (snd_seq_write_pool_allocated(client)) {
1911 /* remove all existing cells */
2dbb155d 1912 snd_seq_pool_mark_closing(client->pool);
1da177e4
LT		 1913 snd_seq_queue_client_leave_cells(client->number);
1914 snd_seq_pool_done(client->pool);
1915 }
1916 client->pool->size = info.output_pool;
1917 rc = snd_seq_pool_init(client->pool);
1918 if (rc < 0)
1919 return rc;
1920 }
1921 if (client->type == USER_CLIENT && client->data.user.fifo != NULL &&
1922 info.input_pool >= 1 &&
1923 info.input_pool <= SNDRV_SEQ_MAX_CLIENT_EVENTS &&
1924 info.input_pool != client->data.user.fifo_pool_size) {
1925 /* change pool size */
1926 rc = snd_seq_fifo_resize(client->data.user.fifo, info.input_pool);
1927 if (rc < 0)
1928 return rc;
1929 client->data.user.fifo_pool_size = info.input_pool;
1930 }
1931 if (info.output_room >= 1 &&
1932 info.output_room <= client->pool->size) {
1933 client->pool->room = info.output_room;
1934 }
1935
1936 return snd_seq_ioctl_get_client_pool(client, arg);
1937}
1938
1939
1940/* REMOVE_EVENTS ioctl() */
c7e0b5bf
TI		 1941static int snd_seq_ioctl_remove_events(struct snd_seq_client *client,
1942 void __user *arg)
1da177e4 1943{
c7e0b5bf 1944 struct snd_seq_remove_events info;
1da177e4
LT		 1945
1946 if (copy_from_user(&info, arg, sizeof(info)))
1947 return -EFAULT;
1948
1949 /*
1950 * Input mostly not implemented XXX.
1951 */
1952 if (info.remove_mode & SNDRV_SEQ_REMOVE_INPUT) {
1953 /*
1954 * No restrictions so for a user client we can clear
1955 * the whole fifo
1956 */
b85a6198 1957 if (client->type == USER_CLIENT && client->data.user.fifo)
1da177e4
LT		 1958 snd_seq_fifo_clear(client->data.user.fifo);
1959 }
1960
1961 if (info.remove_mode & SNDRV_SEQ_REMOVE_OUTPUT)
1962 snd_seq_queue_remove_cells(client->number, &info);
1963
1964 return 0;
1965}
1966
1967
1968/*
1969 * get subscription info
1970 */
c7e0b5bf
TI		 1971static int snd_seq_ioctl_get_subscription(struct snd_seq_client *client,
1972 void __user *arg)
1da177e4
LT		 1973{
1974 int result;
c7e0b5bf
TI		 1975 struct snd_seq_client *sender = NULL;
1976 struct snd_seq_client_port *sport = NULL;
1977 struct snd_seq_port_subscribe subs;
1978 struct snd_seq_subscribers *p;
1da177e4
LT		 1979
1980 if (copy_from_user(&subs, arg, sizeof(subs)))
1981 return -EFAULT;
1982
1983 result = -EINVAL;
1984 if ((sender = snd_seq_client_use_ptr(subs.sender.client)) == NULL)
1985 goto __end;
1986 if ((sport = snd_seq_port_use_ptr(sender, subs.sender.port)) == NULL)
1987 goto __end;
1988 p = snd_seq_port_get_subscription(&sport->c_src, &subs.dest);
1989 if (p) {
1990 result = 0;
1991 subs = p->info;
1992 } else
1993 result = -ENOENT;
1994
1995 __end:
1996 if (sport)
1997 snd_seq_port_unlock(sport);
1998 if (sender)
1999 snd_seq_client_unlock(sender);
2000 if (result >= 0) {
2001 if (copy_to_user(arg, &subs, sizeof(subs)))
2002 return -EFAULT;
2003 }
2004 return result;
2005}
2006
2007
2008/*
2009 * get subscription info - check only its presence
2010 */
c7e0b5bf
TI		 2011static int snd_seq_ioctl_query_subs(struct snd_seq_client *client,
2012 void __user *arg)
1da177e4
LT		 2013{
2014 int result = -ENXIO;
c7e0b5bf
TI		 2015 struct snd_seq_client *cptr = NULL;
2016 struct snd_seq_client_port *port = NULL;
2017 struct snd_seq_query_subs subs;
2018 struct snd_seq_port_subs_info *group;
1da177e4
LT		 2019 struct list_head *p;
2020 int i;
2021
2022 if (copy_from_user(&subs, arg, sizeof(subs)))
2023 return -EFAULT;
2024
2025 if ((cptr = snd_seq_client_use_ptr(subs.root.client)) == NULL)
2026 goto __end;
2027 if ((port = snd_seq_port_use_ptr(cptr, subs.root.port)) == NULL)
2028 goto __end;
2029
2030 switch (subs.type) {
2031 case SNDRV_SEQ_QUERY_SUBS_READ:
2032 group = &port->c_src;
2033 break;
2034 case SNDRV_SEQ_QUERY_SUBS_WRITE:
2035 group = &port->c_dest;
2036 break;
2037 default:
2038 goto __end;
2039 }
2040
2041 down_read(&group->list_mutex);
2042 /* search for the subscriber */
2043 subs.num_subs = group->count;
2044 i = 0;
2045 result = -ENOENT;
2046 list_for_each(p, &group->list_head) {
2047 if (i++ == subs.index) {
2048 /* found! */
c7e0b5bf 2049 struct snd_seq_subscribers *s;
1da177e4 2050 if (subs.type == SNDRV_SEQ_QUERY_SUBS_READ) {
c7e0b5bf 2051 s = list_entry(p, struct snd_seq_subscribers, src_list);
1da177e4
LT		 2052 subs.addr = s->info.dest;
2053 } else {
c7e0b5bf 2054 s = list_entry(p, struct snd_seq_subscribers, dest_list);
1da177e4
LT		 2055 subs.addr = s->info.sender;
2056 }
2057 subs.flags = s->info.flags;
2058 subs.queue = s->info.queue;
2059 result = 0;
2060 break;
2061 }
2062 }
2063 up_read(&group->list_mutex);
2064
2065 __end:
2066 if (port)
2067 snd_seq_port_unlock(port);
2068 if (cptr)
2069 snd_seq_client_unlock(cptr);
2070 if (result >= 0) {
2071 if (copy_to_user(arg, &subs, sizeof(subs)))
2072 return -EFAULT;
2073 }
2074 return result;
2075}
2076
2077
2078/*
2079 * query next client
2080 */
c7e0b5bf
TI		 2081static int snd_seq_ioctl_query_next_client(struct snd_seq_client *client,
2082 void __user *arg)
1da177e4 2083{
c7e0b5bf
TI		 2084 struct snd_seq_client *cptr = NULL;
2085 struct snd_seq_client_info info;
1da177e4
LT		 2086
2087 if (copy_from_user(&info, arg, sizeof(info)))
2088 return -EFAULT;
2089
2090 /* search for next client */
2091 info.client++;
2092 if (info.client < 0)
2093 info.client = 0;
2094 for (; info.client < SNDRV_SEQ_MAX_CLIENTS; info.client++) {
2095 cptr = snd_seq_client_use_ptr(info.client);
2096 if (cptr)
2097 break; /* found */
2098 }
2099 if (cptr == NULL)
2100 return -ENOENT;
2101
2102 get_client_info(cptr, &info);
2103 snd_seq_client_unlock(cptr);
2104
2105 if (copy_to_user(arg, &info, sizeof(info)))
2106 return -EFAULT;
2107 return 0;
2108}
2109
2110/*
2111 * query next port
2112 */
c7e0b5bf
TI		 2113static int snd_seq_ioctl_query_next_port(struct snd_seq_client *client,
2114 void __user *arg)
1da177e4 2115{
c7e0b5bf
TI		 2116 struct snd_seq_client *cptr;
2117 struct snd_seq_client_port *port = NULL;
2118 struct snd_seq_port_info info;
1da177e4
LT		 2119
2120 if (copy_from_user(&info, arg, sizeof(info)))
2121 return -EFAULT;
2122 cptr = snd_seq_client_use_ptr(info.addr.client);
2123 if (cptr == NULL)
2124 return -ENXIO;
2125
2126 /* search for next port */
2127 info.addr.port++;
2128 port = snd_seq_port_query_nearest(cptr, &info);
2129 if (port == NULL) {
2130 snd_seq_client_unlock(cptr);
2131 return -ENOENT;
2132 }
2133
2134 /* get port info */
2135 info.addr = port->addr;
2136 snd_seq_get_port_info(port, &info);
2137 snd_seq_port_unlock(port);
2138 snd_seq_client_unlock(cptr);
2139
2140 if (copy_to_user(arg, &info, sizeof(info)))
2141 return -EFAULT;
2142 return 0;
2143}
2144
2145/* -------------------------------------------------------- */
2146
2147static struct seq_ioctl_table {
2148 unsigned int cmd;
c7e0b5bf 2149 int (*func)(struct snd_seq_client *client, void __user * arg);
1da177e4
LT		 2150} ioctl_tables[] = {
2151 { SNDRV_SEQ_IOCTL_SYSTEM_INFO, snd_seq_ioctl_system_info },
2152 { SNDRV_SEQ_IOCTL_RUNNING_MODE, snd_seq_ioctl_running_mode },
2153 { SNDRV_SEQ_IOCTL_GET_CLIENT_INFO, snd_seq_ioctl_get_client_info },
2154 { SNDRV_SEQ_IOCTL_SET_CLIENT_INFO, snd_seq_ioctl_set_client_info },
2155 { SNDRV_SEQ_IOCTL_CREATE_PORT, snd_seq_ioctl_create_port },
2156 { SNDRV_SEQ_IOCTL_DELETE_PORT, snd_seq_ioctl_delete_port },
2157 { SNDRV_SEQ_IOCTL_GET_PORT_INFO, snd_seq_ioctl_get_port_info },
2158 { SNDRV_SEQ_IOCTL_SET_PORT_INFO, snd_seq_ioctl_set_port_info },
2159 { SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT, snd_seq_ioctl_subscribe_port },
2160 { SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT, snd_seq_ioctl_unsubscribe_port },
2161 { SNDRV_SEQ_IOCTL_CREATE_QUEUE, snd_seq_ioctl_create_queue },
2162 { SNDRV_SEQ_IOCTL_DELETE_QUEUE, snd_seq_ioctl_delete_queue },
2163 { SNDRV_SEQ_IOCTL_GET_QUEUE_INFO, snd_seq_ioctl_get_queue_info },
2164 { SNDRV_SEQ_IOCTL_SET_QUEUE_INFO, snd_seq_ioctl_set_queue_info },
2165 { SNDRV_SEQ_IOCTL_GET_NAMED_QUEUE, snd_seq_ioctl_get_named_queue },
2166 { SNDRV_SEQ_IOCTL_GET_QUEUE_STATUS, snd_seq_ioctl_get_queue_status },
2167 { SNDRV_SEQ_IOCTL_GET_QUEUE_TEMPO, snd_seq_ioctl_get_queue_tempo },
2168 { SNDRV_SEQ_IOCTL_SET_QUEUE_TEMPO, snd_seq_ioctl_set_queue_tempo },
2169 { SNDRV_SEQ_IOCTL_GET_QUEUE_TIMER, snd_seq_ioctl_get_queue_timer },
2170 { SNDRV_SEQ_IOCTL_SET_QUEUE_TIMER, snd_seq_ioctl_set_queue_timer },
2171 { SNDRV_SEQ_IOCTL_GET_QUEUE_CLIENT, snd_seq_ioctl_get_queue_client },
2172 { SNDRV_SEQ_IOCTL_SET_QUEUE_CLIENT, snd_seq_ioctl_set_queue_client },
2173 { SNDRV_SEQ_IOCTL_GET_CLIENT_POOL, snd_seq_ioctl_get_client_pool },
2174 { SNDRV_SEQ_IOCTL_SET_CLIENT_POOL, snd_seq_ioctl_set_client_pool },
2175 { SNDRV_SEQ_IOCTL_GET_SUBSCRIPTION, snd_seq_ioctl_get_subscription },
2176 { SNDRV_SEQ_IOCTL_QUERY_NEXT_CLIENT, snd_seq_ioctl_query_next_client },
2177 { SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT, snd_seq_ioctl_query_next_port },
2178 { SNDRV_SEQ_IOCTL_REMOVE_EVENTS, snd_seq_ioctl_remove_events },
2179 { SNDRV_SEQ_IOCTL_QUERY_SUBS, snd_seq_ioctl_query_subs },
2180 { 0, NULL },
2181};
2182
c7e0b5bf
TI		 2183static int snd_seq_do_ioctl(struct snd_seq_client *client, unsigned int cmd,
2184 void __user *arg)
1da177e4
LT		 2185{
2186 struct seq_ioctl_table *p;
2187
2188 switch (cmd) {
2189 case SNDRV_SEQ_IOCTL_PVERSION:
2190 /* return sequencer version number */
2191 return put_user(SNDRV_SEQ_VERSION, (int __user *)arg) ? -EFAULT : 0;
2192 case SNDRV_SEQ_IOCTL_CLIENT_ID:
2193 /* return the id of this client */
2194 return put_user(client->number, (int __user *)arg) ? -EFAULT : 0;
2195 }
2196
2197 if (! arg)
2198 return -EFAULT;
2199 for (p = ioctl_tables; p->cmd; p++) {
2200 if (p->cmd == cmd)
2201 return p->func(client, arg);
2202 }
c85a4004 2203 snd_printd("seq unknown ioctl() 0x%x (type='%c', number=0x%02x)\n",
1da177e4
LT		 2204 cmd, _IOC_TYPE(cmd), _IOC_NR(cmd));
2205 return -ENOTTY;
2206}
2207
2208
2209static long snd_seq_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2210{
c7e0b5bf 2211 struct snd_seq_client *client = file->private_data;
1da177e4 2212
7eaa943c
TI		 2213 if (snd_BUG_ON(!client))
2214 return -ENXIO;
1da177e4
LT		 2215
2216 return snd_seq_do_ioctl(client, cmd, (void __user *) arg);
2217}
2218
2219#ifdef CONFIG_COMPAT
2220#include "seq_compat.c"
2221#else
2222#define snd_seq_ioctl_compat NULL
2223#endif
2224
2225/* -------------------------------------------------------- */
2226
2227
2228/* exported to kernel modules */
7b6d9245
CL		 2229int snd_seq_create_kernel_client(struct snd_card *card, int client_index,
2230 const char *name_fmt, ...)
1da177e4 2231{
c7e0b5bf 2232 struct snd_seq_client *client;
7b6d9245 2233 va_list args;
1da177e4 2234
7eaa943c
TI		 2235 if (snd_BUG_ON(in_interrupt()))
2236 return -EBUSY;
1da177e4 2237
aa1e77e6 2238 if (card && client_index >= SNDRV_SEQ_CLIENTS_PER_CARD)
1da177e4 2239 return -EINVAL;
aa1e77e6 2240 if (card == NULL && client_index >= SNDRV_SEQ_GLOBAL_CLIENTS)
1da177e4 2241 return -EINVAL;
1da177e4 2242
1a60d4c5 2243 if (mutex_lock_interruptible(&register_mutex))
1da177e4 2244 return -ERESTARTSYS;
d001544d
CL		 2245
2246 if (card) {
aa1e77e6
CL		 2247 client_index += SNDRV_SEQ_GLOBAL_CLIENTS
2248 + card->number * SNDRV_SEQ_CLIENTS_PER_CARD;
2249 if (client_index >= SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN)
d001544d
CL		 2250 client_index = -1;
2251 }
2252
1da177e4 2253 /* empty write queue as default */
aa1e77e6 2254 client = seq_create_client1(client_index, 0);
1da177e4 2255 if (client == NULL) {
1a60d4c5 2256 mutex_unlock(&register_mutex);
1da177e4
LT		 2257 return -EBUSY; /* failure code */
2258 }
2259 usage_alloc(&client_usage, 1);
2260
83e8ad69
CL		 2261 client->accept_input = 1;
2262 client->accept_output = 1;
1da177e4 2263
7b6d9245
CL		 2264 va_start(args, name_fmt);
2265 vsnprintf(client->name, sizeof(client->name), name_fmt, args);
2266 va_end(args);
1da177e4
LT		 2267
2268 client->type = KERNEL_CLIENT;
1a60d4c5 2269 mutex_unlock(&register_mutex);
1da177e4
LT		 2270
2271 /* make others aware this new client */
2272 snd_seq_system_client_ev_client_start(client->number);
2273
2274 /* return client number to caller */
2275 return client->number;
2276}
2277
91715ed9
TI		 2278EXPORT_SYMBOL(snd_seq_create_kernel_client);
2279
1da177e4
LT		 2280/* exported to kernel modules */
2281int snd_seq_delete_kernel_client(int client)
2282{
c7e0b5bf 2283 struct snd_seq_client *ptr;
1da177e4 2284
7eaa943c
TI		 2285 if (snd_BUG_ON(in_interrupt()))
2286 return -EBUSY;
1da177e4
LT		 2287
2288 ptr = clientptr(client);
2289 if (ptr == NULL)
2290 return -EINVAL;
2291
2292 seq_free_client(ptr);
2293 kfree(ptr);
2294 return 0;
2295}
2296
91715ed9 2297EXPORT_SYMBOL(snd_seq_delete_kernel_client);
1da177e4
LT		 2298
2299/* skeleton to enqueue event, called from snd_seq_kernel_client_enqueue
2300 * and snd_seq_kernel_client_enqueue_blocking
2301 */
c7e0b5bf 2302static int kernel_client_enqueue(int client, struct snd_seq_event *ev,
1da177e4
LT		 2303 struct file *file, int blocking,
2304 int atomic, int hop)
2305{
c7e0b5bf 2306 struct snd_seq_client *cptr;
1da177e4
LT		 2307 int result;
2308
7eaa943c
TI		 2309 if (snd_BUG_ON(!ev))
2310 return -EINVAL;
1da177e4
LT		 2311
2312 if (ev->type == SNDRV_SEQ_EVENT_NONE)
2313 return 0; /* ignore this */
2314 if (ev->type == SNDRV_SEQ_EVENT_KERNEL_ERROR)
2315 return -EINVAL; /* quoted events can't be enqueued */
2316
2317 /* fill in client number */
2318 ev->source.client = client;
2319
2320 if (check_event_type_and_length(ev))
2321 return -EINVAL;
2322
2323 cptr = snd_seq_client_use_ptr(client);
2324 if (cptr == NULL)
2325 return -EINVAL;
2326
2327 if (! cptr->accept_output)
2328 result = -EPERM;
2329 else /* send it */
2330 result = snd_seq_client_enqueue_event(cptr, ev, file, blocking, atomic, hop);
2331
2332 snd_seq_client_unlock(cptr);
2333 return result;
2334}
2335
2336/*
2337 * exported, called by kernel clients to enqueue events (w/o blocking)
2338 *
2339 * RETURN VALUE: zero if succeed, negative if error
2340 */
c7e0b5bf 2341int snd_seq_kernel_client_enqueue(int client, struct snd_seq_event * ev,
1da177e4
LT		 2342 int atomic, int hop)
2343{
2344 return kernel_client_enqueue(client, ev, NULL, 0, atomic, hop);
2345}
2346
91715ed9
TI		 2347EXPORT_SYMBOL(snd_seq_kernel_client_enqueue);
2348
1da177e4
LT		 2349/*
2350 * exported, called by kernel clients to enqueue events (with blocking)
2351 *
2352 * RETURN VALUE: zero if succeed, negative if error
2353 */
c7e0b5bf 2354int snd_seq_kernel_client_enqueue_blocking(int client, struct snd_seq_event * ev,
1da177e4
LT		 2355 struct file *file,
2356 int atomic, int hop)
2357{
2358 return kernel_client_enqueue(client, ev, file, 1, atomic, hop);
2359}
2360
91715ed9 2361EXPORT_SYMBOL(snd_seq_kernel_client_enqueue_blocking);
1da177e4
LT		 2362
2363/*
2364 * exported, called by kernel clients to dispatch events directly to other
2365 * clients, bypassing the queues. Event time-stamp will be updated.
2366 *
2367 * RETURN VALUE: negative = delivery failed,
2368 * zero, or positive: the number of delivered events
2369 */
c7e0b5bf 2370int snd_seq_kernel_client_dispatch(int client, struct snd_seq_event * ev,
1da177e4
LT		 2371 int atomic, int hop)
2372{
c7e0b5bf 2373 struct snd_seq_client *cptr;
1da177e4
LT		 2374 int result;
2375
7eaa943c
TI		 2376 if (snd_BUG_ON(!ev))
2377 return -EINVAL;
1da177e4
LT		 2378
2379 /* fill in client number */
2380 ev->queue = SNDRV_SEQ_QUEUE_DIRECT;
2381 ev->source.client = client;
2382
2383 if (check_event_type_and_length(ev))
2384 return -EINVAL;
2385
2386 cptr = snd_seq_client_use_ptr(client);
2387 if (cptr == NULL)
2388 return -EINVAL;
2389
2390 if (!cptr->accept_output)
2391 result = -EPERM;
2392 else
2393 result = snd_seq_deliver_event(cptr, ev, atomic, hop);
2394
2395 snd_seq_client_unlock(cptr);
2396 return result;
2397}
2398
91715ed9 2399EXPORT_SYMBOL(snd_seq_kernel_client_dispatch);
1da177e4
LT		 2400
2401/*
2402 * exported, called by kernel clients to perform same functions as with
2403 * userland ioctl()
2404 */
2405int snd_seq_kernel_client_ctl(int clientid, unsigned int cmd, void *arg)
2406{
c7e0b5bf 2407 struct snd_seq_client *client;
1da177e4
LT		 2408 mm_segment_t fs;
2409 int result;
2410
2411 client = clientptr(clientid);
2412 if (client == NULL)
2413 return -ENXIO;
2414 fs = snd_enter_user();
fea952e5 2415 result = snd_seq_do_ioctl(client, cmd, (void __force __user *)arg);
1da177e4
LT		 2416 snd_leave_user(fs);
2417 return result;
2418}
2419
91715ed9 2420EXPORT_SYMBOL(snd_seq_kernel_client_ctl);
1da177e4
LT		 2421
2422/* exported (for OSS emulator) */
2423int snd_seq_kernel_client_write_poll(int clientid, struct file *file, poll_table *wait)
2424{
c7e0b5bf 2425 struct snd_seq_client *client;
1da177e4
LT		 2426
2427 client = clientptr(clientid);
2428 if (client == NULL)
2429 return -ENXIO;
2430
2431 if (! snd_seq_write_pool_allocated(client))
2432 return 1;
2433 if (snd_seq_pool_poll_wait(client->pool, file, wait))
2434 return 1;
2435 return 0;
2436}
2437
91715ed9
TI		 2438EXPORT_SYMBOL(snd_seq_kernel_client_write_poll);
2439
1da177e4
LT		 2440/*---------------------------------------------------------------------------*/
2441
04f141a8 2442#ifdef CONFIG_PROC_FS
1da177e4
LT		 2443/*
2444 * /proc interface
2445 */
c7e0b5bf
TI		 2446static void snd_seq_info_dump_subscribers(struct snd_info_buffer *buffer,
2447 struct snd_seq_port_subs_info *group,
2448 int is_src, char *msg)
1da177e4
LT		 2449{
2450 struct list_head *p;
c7e0b5bf 2451 struct snd_seq_subscribers *s;
1da177e4
LT		 2452 int count = 0;
2453
2454 down_read(&group->list_mutex);
2455 if (list_empty(&group->list_head)) {
2456 up_read(&group->list_mutex);
2457 return;
2458 }
2459 snd_iprintf(buffer, msg);
2460 list_for_each(p, &group->list_head) {
2461 if (is_src)
c7e0b5bf 2462 s = list_entry(p, struct snd_seq_subscribers, src_list);
1da177e4 2463 else
c7e0b5bf 2464 s = list_entry(p, struct snd_seq_subscribers, dest_list);
1da177e4
LT		 2465 if (count++)
2466 snd_iprintf(buffer, ", ");
2467 snd_iprintf(buffer, "%d:%d",
2468 is_src ? s->info.dest.client : s->info.sender.client,
2469 is_src ? s->info.dest.port : s->info.sender.port);
2470 if (s->info.flags & SNDRV_SEQ_PORT_SUBS_TIMESTAMP)
2471 snd_iprintf(buffer, "[%c:%d]", ((s->info.flags & SNDRV_SEQ_PORT_SUBS_TIME_REAL) ? 'r' : 't'), s->info.queue);
2472 if (group->exclusive)
2473 snd_iprintf(buffer, "[ex]");
2474 }
2475 up_read(&group->list_mutex);
2476 snd_iprintf(buffer, "\n");
2477}
2478
2479#define FLAG_PERM_RD(perm) ((perm) & SNDRV_SEQ_PORT_CAP_READ ? ((perm) & SNDRV_SEQ_PORT_CAP_SUBS_READ ? 'R' : 'r') : '-')
2480#define FLAG_PERM_WR(perm) ((perm) & SNDRV_SEQ_PORT_CAP_WRITE ? ((perm) & SNDRV_SEQ_PORT_CAP_SUBS_WRITE ? 'W' : 'w') : '-')
2481#define FLAG_PERM_EX(perm) ((perm) & SNDRV_SEQ_PORT_CAP_NO_EXPORT ? '-' : 'e')
2482
2483#define FLAG_PERM_DUPLEX(perm) ((perm) & SNDRV_SEQ_PORT_CAP_DUPLEX ? 'X' : '-')
2484
c7e0b5bf
TI		 2485static void snd_seq_info_dump_ports(struct snd_info_buffer *buffer,
2486 struct snd_seq_client *client)
1da177e4 2487{
9244b2c3 2488 struct snd_seq_client_port *p;
1da177e4 2489
1a60d4c5 2490 mutex_lock(&client->ports_mutex);
9244b2c3 2491 list_for_each_entry(p, &client->ports_list_head, list) {
1da177e4
LT		 2492 snd_iprintf(buffer, " Port %3d : \"%s\" (%c%c%c%c)\n",
2493 p->addr.port, p->name,
2494 FLAG_PERM_RD(p->capability),
2495 FLAG_PERM_WR(p->capability),
2496 FLAG_PERM_EX(p->capability),
2497 FLAG_PERM_DUPLEX(p->capability));
2498 snd_seq_info_dump_subscribers(buffer, &p->c_src, 1, " Connecting To: ");
2499 snd_seq_info_dump_subscribers(buffer, &p->c_dest, 0, " Connected From: ");
2500 }
1a60d4c5 2501 mutex_unlock(&client->ports_mutex);
1da177e4
LT		 2502}
2503
2504
2505/* exported to seq_info.c */
c7e0b5bf
TI		 2506void snd_seq_info_clients_read(struct snd_info_entry *entry,
2507 struct snd_info_buffer *buffer)
1da177e4 2508{
1da177e4 2509 int c;
c7e0b5bf 2510 struct snd_seq_client *client;
1da177e4
LT		 2511
2512 snd_iprintf(buffer, "Client info\n");
2513 snd_iprintf(buffer, " cur clients : %d\n", client_usage.cur);
2514 snd_iprintf(buffer, " peak clients : %d\n", client_usage.peak);
2515 snd_iprintf(buffer, " max clients : %d\n", SNDRV_SEQ_MAX_CLIENTS);
2516 snd_iprintf(buffer, "\n");
2517
2518 /* list the client table */
2519 for (c = 0; c < SNDRV_SEQ_MAX_CLIENTS; c++) {
2520 client = snd_seq_client_use_ptr(c);
2521 if (client == NULL)
2522 continue;
2523 if (client->type == NO_CLIENT) {
2524 snd_seq_client_unlock(client);
2525 continue;
2526 }
2527
2528 snd_iprintf(buffer, "Client %3d : \"%s\" [%s]\n",
2529 c, client->name,
2530 client->type == USER_CLIENT ? "User" : "Kernel");
2531 snd_seq_info_dump_ports(buffer, client);
2532 if (snd_seq_write_pool_allocated(client)) {
2533 snd_iprintf(buffer, " Output pool :\n");
2534 snd_seq_info_pool(buffer, client->pool, " ");
2535 }
2536 if (client->type == USER_CLIENT && client->data.user.fifo &&
2537 client->data.user.fifo->pool) {
2538 snd_iprintf(buffer, " Input pool :\n");
2539 snd_seq_info_pool(buffer, client->data.user.fifo->pool, " ");
2540 }
2541 snd_seq_client_unlock(client);
2542 }
2543}
04f141a8 2544#endif /* CONFIG_PROC_FS */
1da177e4
LT		 2545
2546/*---------------------------------------------------------------------------*/
2547
2548
2549/*
2550 * REGISTRATION PART
2551 */
2552
9c2e08c5 2553static const struct file_operations snd_seq_f_ops =
1da177e4
LT		 2554{
2555 .owner = THIS_MODULE,
2556 .read = snd_seq_read,
2557 .write = snd_seq_write,
2558 .open = snd_seq_open,
2559 .release = snd_seq_release,
02f4865f 2560 .llseek = no_llseek,
1da177e4
LT		 2561 .poll = snd_seq_poll,
2562 .unlocked_ioctl = snd_seq_ioctl,
2563 .compat_ioctl = snd_seq_ioctl_compat,
2564};
2565
1da177e4
LT		 2566/*
2567 * register sequencer device
2568 */
2569int __init snd_sequencer_device_init(void)
2570{
2571 int err;
2572
1a60d4c5 2573 if (mutex_lock_interruptible(&register_mutex))
1da177e4
LT		 2574 return -ERESTARTSYS;
2575
2af677fc 2576 if ((err = snd_register_device(SNDRV_DEVICE_TYPE_SEQUENCER, NULL, 0,
f87135f5 2577 &snd_seq_f_ops, NULL, "seq")) < 0) {
1a60d4c5 2578 mutex_unlock(&register_mutex);
1da177e4
LT		 2579 return err;
2580 }
2581
1a60d4c5 2582 mutex_unlock(&register_mutex);
1da177e4
LT		 2583
2584 return 0;
2585}
2586
2587
2588
2589/*
2590 * unregister sequencer device
2591 */
2592void __exit snd_sequencer_device_done(void)
2593{
2594 snd_unregister_device(SNDRV_DEVICE_TYPE_SEQUENCER, NULL, 0);
2595}
kernel source for telekom puls (alcatel/mediatek)