2 * ALSA sequencer Client Manager
3 * Copyright (c) 1998-2001 by Frank van de Pol <fvdpol@coil.demon.nl>
4 * Jaroslav Kysela <perex@suse.cz>
5 * Takashi Iwai <tiwai@suse.de>
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.
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.
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
24 #include <sound/driver.h>
25 #include <linux/init.h>
26 #include <linux/smp_lock.h>
27 #include <linux/slab.h>
28 #include <sound/core.h>
29 #include <sound/minors.h>
30 #include <linux/kmod.h>
32 #include <sound/seq_kernel.h>
33 #include "seq_clientmgr.h"
34 #include "seq_memory.h"
35 #include "seq_queue.h"
36 #include "seq_timer.h"
38 #include "seq_system.h"
39 #include <sound/seq_device.h>
41 #include <linux/compat.h>
46 * this module handles the connections of userland and kernel clients
51 * There are four ranges of client numbers (last two shared):
52 * 0..15: global clients
53 * 16..127: statically allocated client numbers for cards 0..27
54 * 128..191: dynamically allocated client numbers for cards 28..31
55 * 128..191: dynamically allocated client numbers for applications
58 /* number of kernel non-card clients */
59 #define SNDRV_SEQ_GLOBAL_CLIENTS 16
60 /* clients per cards, for static clients */
61 #define SNDRV_SEQ_CLIENTS_PER_CARD 4
62 /* dynamically allocated client numbers (both kernel drivers and user space) */
63 #define SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN 128
65 #define SNDRV_SEQ_LFLG_INPUT 0x0001
66 #define SNDRV_SEQ_LFLG_OUTPUT 0x0002
67 #define SNDRV_SEQ_LFLG_OPEN (SNDRV_SEQ_LFLG_INPUT|SNDRV_SEQ_LFLG_OUTPUT)
69 static DEFINE_SPINLOCK(clients_lock);
70 static DEFINE_MUTEX(register_mutex);
75 static char clienttablock[SNDRV_SEQ_MAX_CLIENTS];
76 static struct snd_seq_client *clienttab[SNDRV_SEQ_MAX_CLIENTS];
77 static struct snd_seq_usage client_usage;
82 static int bounce_error_event(struct snd_seq_client *client,
83 struct snd_seq_event *event,
84 int err, int atomic, int hop);
85 static int snd_seq_deliver_single_event(struct snd_seq_client *client,
86 struct snd_seq_event *event,
87 int filter, int atomic, int hop);
92 static inline mm_segment_t snd_enter_user(void)
94 mm_segment_t fs = get_fs();
99 static inline void snd_leave_user(mm_segment_t fs)
106 static inline unsigned short snd_seq_file_flags(struct file *file)
108 switch (file->f_mode & (FMODE_READ | FMODE_WRITE)) {
110 return SNDRV_SEQ_LFLG_OUTPUT;
112 return SNDRV_SEQ_LFLG_INPUT;
114 return SNDRV_SEQ_LFLG_OPEN;
118 static inline int snd_seq_write_pool_allocated(struct snd_seq_client *client)
120 return snd_seq_total_cells(client->pool) > 0;
123 /* return pointer to client structure for specified id */
124 static struct snd_seq_client *clientptr(int clientid)
126 if (clientid < 0 || clientid >= SNDRV_SEQ_MAX_CLIENTS) {
127 snd_printd("Seq: oops. Trying to get pointer to client %d\n",
131 return clienttab[clientid];
134 extern int seq_client_load[];
136 struct snd_seq_client *snd_seq_client_use_ptr(int clientid)
139 struct snd_seq_client *client;
141 if (clientid < 0 || clientid >= SNDRV_SEQ_MAX_CLIENTS) {
142 snd_printd("Seq: oops. Trying to get pointer to client %d\n",
146 spin_lock_irqsave(&clients_lock, flags);
147 client = clientptr(clientid);
150 if (clienttablock[clientid]) {
151 spin_unlock_irqrestore(&clients_lock, flags);
154 spin_unlock_irqrestore(&clients_lock, flags);
156 if (!in_interrupt() && current->fs->root) {
157 static char client_requested[SNDRV_SEQ_GLOBAL_CLIENTS];
158 static char card_requested[SNDRV_CARDS];
159 if (clientid < SNDRV_SEQ_GLOBAL_CLIENTS) {
162 if (! client_requested[clientid] && current->fs->root) {
163 client_requested[clientid] = 1;
164 for (idx = 0; idx < 15; idx++) {
165 if (seq_client_load[idx] < 0)
167 if (seq_client_load[idx] == clientid) {
168 request_module("snd-seq-client-%i",
174 } else if (clientid < SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN) {
175 int card = (clientid - SNDRV_SEQ_GLOBAL_CLIENTS) /
176 SNDRV_SEQ_CLIENTS_PER_CARD;
177 if (card < snd_ecards_limit) {
178 if (! card_requested[card]) {
179 card_requested[card] = 1;
180 snd_request_card(card);
182 snd_seq_device_load_drivers();
185 spin_lock_irqsave(&clients_lock, flags);
186 client = clientptr(clientid);
189 spin_unlock_irqrestore(&clients_lock, flags);
195 snd_use_lock_use(&client->use_lock);
196 spin_unlock_irqrestore(&clients_lock, flags);
200 static void usage_alloc(struct snd_seq_usage *res, int num)
203 if (res->cur > res->peak)
204 res->peak = res->cur;
207 static void usage_free(struct snd_seq_usage *res, int num)
212 /* initialise data structures */
213 int __init client_init_data(void)
215 /* zap out the client table */
216 memset(&clienttablock, 0, sizeof(clienttablock));
217 memset(&clienttab, 0, sizeof(clienttab));
222 static struct snd_seq_client *seq_create_client1(int client_index, int poolsize)
226 struct snd_seq_client *client;
228 /* init client data */
229 client = kzalloc(sizeof(*client), GFP_KERNEL);
232 client->pool = snd_seq_pool_new(poolsize);
233 if (client->pool == NULL) {
237 client->type = NO_CLIENT;
238 snd_use_lock_init(&client->use_lock);
239 rwlock_init(&client->ports_lock);
240 mutex_init(&client->ports_mutex);
241 INIT_LIST_HEAD(&client->ports_list_head);
243 /* find free slot in the client table */
244 spin_lock_irqsave(&clients_lock, flags);
245 if (client_index < 0) {
246 for (c = SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN;
247 c < SNDRV_SEQ_MAX_CLIENTS;
249 if (clienttab[c] || clienttablock[c])
251 clienttab[client->number = c] = client;
252 spin_unlock_irqrestore(&clients_lock, flags);
256 if (clienttab[client_index] == NULL && !clienttablock[client_index]) {
257 clienttab[client->number = client_index] = client;
258 spin_unlock_irqrestore(&clients_lock, flags);
262 spin_unlock_irqrestore(&clients_lock, flags);
263 snd_seq_pool_delete(&client->pool);
265 return NULL; /* no free slot found or busy, return failure code */
269 static int seq_free_client1(struct snd_seq_client *client)
273 snd_assert(client != NULL, return -EINVAL);
274 snd_seq_delete_all_ports(client);
275 snd_seq_queue_client_leave(client->number);
276 spin_lock_irqsave(&clients_lock, flags);
277 clienttablock[client->number] = 1;
278 clienttab[client->number] = NULL;
279 spin_unlock_irqrestore(&clients_lock, flags);
280 snd_use_lock_sync(&client->use_lock);
281 snd_seq_queue_client_termination(client->number);
283 snd_seq_pool_delete(&client->pool);
284 spin_lock_irqsave(&clients_lock, flags);
285 clienttablock[client->number] = 0;
286 spin_unlock_irqrestore(&clients_lock, flags);
291 static void seq_free_client(struct snd_seq_client * client)
293 mutex_lock(®ister_mutex);
294 switch (client->type) {
296 snd_printk(KERN_WARNING "Seq: Trying to free unused client %d\n",
301 seq_free_client1(client);
302 usage_free(&client_usage, 1);
306 snd_printk(KERN_ERR "Seq: Trying to free client %d with undefined type = %d\n",
307 client->number, client->type);
309 mutex_unlock(®ister_mutex);
311 snd_seq_system_client_ev_client_exit(client->number);
316 /* -------------------------------------------------------- */
318 /* create a user client */
319 static int snd_seq_open(struct inode *inode, struct file *file)
321 int c, mode; /* client id */
322 struct snd_seq_client *client;
323 struct snd_seq_user_client *user;
325 if (mutex_lock_interruptible(®ister_mutex))
327 client = seq_create_client1(-1, SNDRV_SEQ_DEFAULT_EVENTS);
328 if (client == NULL) {
329 mutex_unlock(®ister_mutex);
330 return -ENOMEM; /* failure code */
333 mode = snd_seq_file_flags(file);
334 if (mode & SNDRV_SEQ_LFLG_INPUT)
335 client->accept_input = 1;
336 if (mode & SNDRV_SEQ_LFLG_OUTPUT)
337 client->accept_output = 1;
339 user = &client->data.user;
341 user->fifo_pool_size = 0;
343 if (mode & SNDRV_SEQ_LFLG_INPUT) {
344 user->fifo_pool_size = SNDRV_SEQ_DEFAULT_CLIENT_EVENTS;
345 user->fifo = snd_seq_fifo_new(user->fifo_pool_size);
346 if (user->fifo == NULL) {
347 seq_free_client1(client);
349 mutex_unlock(®ister_mutex);
354 usage_alloc(&client_usage, 1);
355 client->type = USER_CLIENT;
356 mutex_unlock(®ister_mutex);
359 file->private_data = client;
361 /* fill client data */
363 sprintf(client->name, "Client-%d", c);
365 /* make others aware this new client */
366 snd_seq_system_client_ev_client_start(c);
371 /* delete a user client */
372 static int snd_seq_release(struct inode *inode, struct file *file)
374 struct snd_seq_client *client = file->private_data;
377 seq_free_client(client);
378 if (client->data.user.fifo)
379 snd_seq_fifo_delete(&client->data.user.fifo);
387 /* handle client read() */
388 /* possible error values:
389 * -ENXIO invalid client or file open mode
390 * -ENOSPC FIFO overflow (the flag is cleared after this error report)
391 * -EINVAL no enough user-space buffer to write the whole event
392 * -EFAULT seg. fault during copy to user space
394 static ssize_t snd_seq_read(struct file *file, char __user *buf, size_t count,
397 struct snd_seq_client *client = file->private_data;
398 struct snd_seq_fifo *fifo;
401 struct snd_seq_event_cell *cell;
403 if (!(snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_INPUT))
406 if (!access_ok(VERIFY_WRITE, buf, count))
409 /* check client structures are in place */
410 snd_assert(client != NULL, return -ENXIO);
412 if (!client->accept_input || (fifo = client->data.user.fifo) == NULL)
415 if (atomic_read(&fifo->overflow) > 0) {
416 /* buffer overflow is detected */
417 snd_seq_fifo_clear(fifo);
418 /* return error code */
424 snd_seq_fifo_lock(fifo);
426 /* while data available in queue */
427 while (count >= sizeof(struct snd_seq_event)) {
430 nonblock = (file->f_flags & O_NONBLOCK) || result > 0;
431 if ((err = snd_seq_fifo_cell_out(fifo, &cell, nonblock)) < 0) {
434 if (snd_seq_ev_is_variable(&cell->event)) {
435 struct snd_seq_event tmpev;
437 tmpev.data.ext.len &= ~SNDRV_SEQ_EXT_MASK;
438 if (copy_to_user(buf, &tmpev, sizeof(struct snd_seq_event))) {
442 count -= sizeof(struct snd_seq_event);
443 buf += sizeof(struct snd_seq_event);
444 err = snd_seq_expand_var_event(&cell->event, count,
445 (char __force *)buf, 0,
446 sizeof(struct snd_seq_event));
453 if (copy_to_user(buf, &cell->event, sizeof(struct snd_seq_event))) {
457 count -= sizeof(struct snd_seq_event);
458 buf += sizeof(struct snd_seq_event);
460 snd_seq_cell_free(cell);
461 cell = NULL; /* to be sure */
462 result += sizeof(struct snd_seq_event);
467 snd_seq_fifo_cell_putback(fifo, cell);
468 if (err == -EAGAIN && result > 0)
471 snd_seq_fifo_unlock(fifo);
473 return (err < 0) ? err : result;
478 * check access permission to the port
480 static int check_port_perm(struct snd_seq_client_port *port, unsigned int flags)
482 if ((port->capability & flags) != flags)
488 * check if the destination client is available, and return the pointer
489 * if filter is non-zero, client filter bitmap is tested.
491 static struct snd_seq_client *get_event_dest_client(struct snd_seq_event *event,
494 struct snd_seq_client *dest;
496 dest = snd_seq_client_use_ptr(event->dest.client);
499 if (! dest->accept_input)
501 if ((dest->filter & SNDRV_SEQ_FILTER_USE_EVENT) &&
502 ! test_bit(event->type, dest->event_filter))
504 if (filter && !(dest->filter & filter))
507 return dest; /* ok - accessible */
509 snd_seq_client_unlock(dest);
515 * Return the error event.
517 * If the receiver client is a user client, the original event is
518 * encapsulated in SNDRV_SEQ_EVENT_BOUNCE as variable length event. If
519 * the original event is also variable length, the external data is
520 * copied after the event record.
521 * If the receiver client is a kernel client, the original event is
522 * quoted in SNDRV_SEQ_EVENT_KERNEL_ERROR, since this requires no extra
525 static int bounce_error_event(struct snd_seq_client *client,
526 struct snd_seq_event *event,
527 int err, int atomic, int hop)
529 struct snd_seq_event bounce_ev;
532 if (client == NULL ||
533 ! (client->filter & SNDRV_SEQ_FILTER_BOUNCE) ||
534 ! client->accept_input)
535 return 0; /* ignored */
537 /* set up quoted error */
538 memset(&bounce_ev, 0, sizeof(bounce_ev));
539 bounce_ev.type = SNDRV_SEQ_EVENT_KERNEL_ERROR;
540 bounce_ev.flags = SNDRV_SEQ_EVENT_LENGTH_FIXED;
541 bounce_ev.queue = SNDRV_SEQ_QUEUE_DIRECT;
542 bounce_ev.source.client = SNDRV_SEQ_CLIENT_SYSTEM;
543 bounce_ev.source.port = SNDRV_SEQ_PORT_SYSTEM_ANNOUNCE;
544 bounce_ev.dest.client = client->number;
545 bounce_ev.dest.port = event->source.port;
546 bounce_ev.data.quote.origin = event->dest;
547 bounce_ev.data.quote.event = event;
548 bounce_ev.data.quote.value = -err; /* use positive value */
549 result = snd_seq_deliver_single_event(NULL, &bounce_ev, 0, atomic, hop + 1);
551 client->event_lost++;
560 * rewrite the time-stamp of the event record with the curren time
561 * of the given queue.
562 * return non-zero if updated.
564 static int update_timestamp_of_queue(struct snd_seq_event *event,
565 int queue, int real_time)
567 struct snd_seq_queue *q;
572 event->queue = queue;
573 event->flags &= ~SNDRV_SEQ_TIME_STAMP_MASK;
575 event->time.time = snd_seq_timer_get_cur_time(q->timer);
576 event->flags |= SNDRV_SEQ_TIME_STAMP_REAL;
578 event->time.tick = snd_seq_timer_get_cur_tick(q->timer);
579 event->flags |= SNDRV_SEQ_TIME_STAMP_TICK;
587 * deliver an event to the specified destination.
588 * if filter is non-zero, client filter bitmap is tested.
590 * RETURN VALUE: 0 : if succeeded
593 static int snd_seq_deliver_single_event(struct snd_seq_client *client,
594 struct snd_seq_event *event,
595 int filter, int atomic, int hop)
597 struct snd_seq_client *dest = NULL;
598 struct snd_seq_client_port *dest_port = NULL;
599 int result = -ENOENT;
602 direct = snd_seq_ev_is_direct(event);
604 dest = get_event_dest_client(event, filter);
607 dest_port = snd_seq_port_use_ptr(dest, event->dest.port);
608 if (dest_port == NULL)
611 /* check permission */
612 if (! check_port_perm(dest_port, SNDRV_SEQ_PORT_CAP_WRITE)) {
617 if (dest_port->timestamping)
618 update_timestamp_of_queue(event, dest_port->time_queue,
619 dest_port->time_real);
621 switch (dest->type) {
623 if (dest->data.user.fifo)
624 result = snd_seq_fifo_event_in(dest->data.user.fifo, event);
628 if (dest_port->event_input == NULL)
630 result = dest_port->event_input(event, direct,
631 dest_port->private_data,
640 snd_seq_port_unlock(dest_port);
642 snd_seq_client_unlock(dest);
644 if (result < 0 && !direct) {
645 result = bounce_error_event(client, event, result, atomic, hop);
652 * send the event to all subscribers:
654 static int deliver_to_subscribers(struct snd_seq_client *client,
655 struct snd_seq_event *event,
658 struct snd_seq_subscribers *subs;
659 int err = 0, num_ev = 0;
660 struct snd_seq_event event_saved;
661 struct snd_seq_client_port *src_port;
663 struct snd_seq_port_subs_info *grp;
665 src_port = snd_seq_port_use_ptr(client, event->source.port);
666 if (src_port == NULL)
667 return -EINVAL; /* invalid source port */
668 /* save original event record */
669 event_saved = *event;
670 grp = &src_port->c_src;
674 read_lock(&grp->list_lock);
676 down_read(&grp->list_mutex);
677 list_for_each(p, &grp->list_head) {
678 subs = list_entry(p, struct snd_seq_subscribers, src_list);
679 event->dest = subs->info.dest;
680 if (subs->info.flags & SNDRV_SEQ_PORT_SUBS_TIMESTAMP)
681 /* convert time according to flag with subscription */
682 update_timestamp_of_queue(event, subs->info.queue,
683 subs->info.flags & SNDRV_SEQ_PORT_SUBS_TIME_REAL);
684 err = snd_seq_deliver_single_event(client, event,
689 /* restore original event record */
690 *event = event_saved;
693 read_unlock(&grp->list_lock);
695 up_read(&grp->list_mutex);
696 *event = event_saved; /* restore */
697 snd_seq_port_unlock(src_port);
698 return (err < 0) ? err : num_ev;
702 #ifdef SUPPORT_BROADCAST
704 * broadcast to all ports:
706 static int port_broadcast_event(struct snd_seq_client *client,
707 struct snd_seq_event *event,
710 int num_ev = 0, err = 0;
711 struct snd_seq_client *dest_client;
714 dest_client = get_event_dest_client(event, SNDRV_SEQ_FILTER_BROADCAST);
715 if (dest_client == NULL)
716 return 0; /* no matching destination */
718 read_lock(&dest_client->ports_lock);
719 list_for_each(p, &dest_client->ports_list_head) {
720 struct snd_seq_client_port *port = list_entry(p, struct snd_seq_client_port, list);
721 event->dest.port = port->addr.port;
722 /* pass NULL as source client to avoid error bounce */
723 err = snd_seq_deliver_single_event(NULL, event,
724 SNDRV_SEQ_FILTER_BROADCAST,
730 read_unlock(&dest_client->ports_lock);
731 snd_seq_client_unlock(dest_client);
732 event->dest.port = SNDRV_SEQ_ADDRESS_BROADCAST; /* restore */
733 return (err < 0) ? err : num_ev;
737 * send the event to all clients:
738 * if destination port is also ADDRESS_BROADCAST, deliver to all ports.
740 static int broadcast_event(struct snd_seq_client *client,
741 struct snd_seq_event *event, int atomic, int hop)
743 int err = 0, num_ev = 0;
745 struct snd_seq_addr addr;
747 addr = event->dest; /* save */
749 for (dest = 0; dest < SNDRV_SEQ_MAX_CLIENTS; dest++) {
750 /* don't send to itself */
751 if (dest == client->number)
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);
758 /* pass NULL as source client to avoid error bounce */
759 err = snd_seq_deliver_single_event(NULL, event,
760 SNDRV_SEQ_FILTER_BROADCAST,
766 event->dest = addr; /* restore */
767 return (err < 0) ? err : num_ev;
771 /* multicast - not supported yet */
772 static int multicast_event(struct snd_seq_client *client, struct snd_seq_event *event,
775 snd_printd("seq: multicast not supported yet.\n");
776 return 0; /* ignored */
778 #endif /* SUPPORT_BROADCAST */
781 /* deliver an event to the destination port(s).
782 * if the event is to subscribers or broadcast, the event is dispatched
783 * to multiple targets.
785 * RETURN VALUE: n > 0 : the number of delivered events.
786 * n == 0 : the event was not passed to any client.
787 * n < 0 : error - event was not processed.
789 static int snd_seq_deliver_event(struct snd_seq_client *client, struct snd_seq_event *event,
795 if (hop >= SNDRV_SEQ_MAX_HOPS) {
796 snd_printd("too long delivery path (%d:%d->%d:%d)\n",
797 event->source.client, event->source.port,
798 event->dest.client, event->dest.port);
802 if (event->queue == SNDRV_SEQ_ADDRESS_SUBSCRIBERS ||
803 event->dest.client == SNDRV_SEQ_ADDRESS_SUBSCRIBERS)
804 result = deliver_to_subscribers(client, event, atomic, hop);
805 #ifdef SUPPORT_BROADCAST
806 else if (event->queue == SNDRV_SEQ_ADDRESS_BROADCAST ||
807 event->dest.client == SNDRV_SEQ_ADDRESS_BROADCAST)
808 result = broadcast_event(client, event, atomic, hop);
809 else if (event->dest.client >= SNDRV_SEQ_MAX_CLIENTS)
810 result = multicast_event(client, event, atomic, hop);
811 else if (event->dest.port == SNDRV_SEQ_ADDRESS_BROADCAST)
812 result = port_broadcast_event(client, event, atomic, hop);
815 result = snd_seq_deliver_single_event(client, event, 0, atomic, hop);
821 * dispatch an event cell:
822 * This function is called only from queue check routines in timer
823 * interrupts or after enqueued.
824 * The event cell shall be released or re-queued in this function.
826 * RETURN VALUE: n > 0 : the number of delivered events.
827 * n == 0 : the event was not passed to any client.
828 * n < 0 : error - event was not processed.
830 int snd_seq_dispatch_event(struct snd_seq_event_cell *cell, int atomic, int hop)
832 struct snd_seq_client *client;
835 snd_assert(cell != NULL, return -EINVAL);
837 client = snd_seq_client_use_ptr(cell->event.source.client);
838 if (client == NULL) {
839 snd_seq_cell_free(cell); /* release this cell */
843 if (cell->event.type == SNDRV_SEQ_EVENT_NOTE) {
845 * the event cell is re-used as a NOTE-OFF event and
848 struct snd_seq_event tmpev, *ev;
850 /* reserve this event to enqueue note-off later */
852 tmpev.type = SNDRV_SEQ_EVENT_NOTEON;
853 result = snd_seq_deliver_event(client, &tmpev, atomic, hop);
856 * This was originally a note event. We now re-use the
857 * cell for the note-off event.
861 ev->type = SNDRV_SEQ_EVENT_NOTEOFF;
862 ev->flags |= SNDRV_SEQ_PRIORITY_HIGH;
864 /* add the duration time */
865 switch (ev->flags & SNDRV_SEQ_TIME_STAMP_MASK) {
866 case SNDRV_SEQ_TIME_STAMP_TICK:
867 ev->time.tick += ev->data.note.duration;
869 case SNDRV_SEQ_TIME_STAMP_REAL:
870 /* unit for duration is ms */
871 ev->time.time.tv_nsec += 1000000 * (ev->data.note.duration % 1000);
872 ev->time.time.tv_sec += ev->data.note.duration / 1000 +
873 ev->time.time.tv_nsec / 1000000000;
874 ev->time.time.tv_nsec %= 1000000000;
877 ev->data.note.velocity = ev->data.note.off_velocity;
879 /* Now queue this cell as the note off event */
880 if (snd_seq_enqueue_event(cell, atomic, hop) < 0)
881 snd_seq_cell_free(cell); /* release this cell */
885 * event cell is freed after processing the event
888 result = snd_seq_deliver_event(client, &cell->event, atomic, hop);
889 snd_seq_cell_free(cell);
892 snd_seq_client_unlock(client);
897 /* Allocate a cell from client pool and enqueue it to queue:
898 * if pool is empty and blocking is TRUE, sleep until a new cell is
901 static int snd_seq_client_enqueue_event(struct snd_seq_client *client,
902 struct snd_seq_event *event,
903 struct file *file, int blocking,
906 struct snd_seq_event_cell *cell;
909 /* special queue values - force direct passing */
910 if (event->queue == SNDRV_SEQ_ADDRESS_SUBSCRIBERS) {
911 event->dest.client = SNDRV_SEQ_ADDRESS_SUBSCRIBERS;
912 event->queue = SNDRV_SEQ_QUEUE_DIRECT;
914 #ifdef SUPPORT_BROADCAST
915 if (event->queue == SNDRV_SEQ_ADDRESS_BROADCAST) {
916 event->dest.client = SNDRV_SEQ_ADDRESS_BROADCAST;
917 event->queue = SNDRV_SEQ_QUEUE_DIRECT;
920 if (event->dest.client == SNDRV_SEQ_ADDRESS_SUBSCRIBERS) {
921 /* check presence of source port */
922 struct snd_seq_client_port *src_port = snd_seq_port_use_ptr(client, event->source.port);
923 if (src_port == NULL)
925 snd_seq_port_unlock(src_port);
928 /* direct event processing without enqueued */
929 if (snd_seq_ev_is_direct(event)) {
930 if (event->type == SNDRV_SEQ_EVENT_NOTE)
931 return -EINVAL; /* this event must be enqueued! */
932 return snd_seq_deliver_event(client, event, atomic, hop);
935 /* Not direct, normal queuing */
936 if (snd_seq_queue_is_used(event->queue, client->number) <= 0)
937 return -EINVAL; /* invalid queue */
938 if (! snd_seq_write_pool_allocated(client))
939 return -ENXIO; /* queue is not allocated */
941 /* allocate an event cell */
942 err = snd_seq_event_dup(client->pool, event, &cell, !blocking || atomic, file);
946 /* we got a cell. enqueue it. */
947 if ((err = snd_seq_enqueue_event(cell, atomic, hop)) < 0) {
948 snd_seq_cell_free(cell);
957 * check validity of event type and data length.
958 * return non-zero if invalid.
960 static int check_event_type_and_length(struct snd_seq_event *ev)
962 switch (snd_seq_ev_length_type(ev)) {
963 case SNDRV_SEQ_EVENT_LENGTH_FIXED:
964 if (snd_seq_ev_is_variable_type(ev))
967 case SNDRV_SEQ_EVENT_LENGTH_VARIABLE:
968 if (! snd_seq_ev_is_variable_type(ev) ||
969 (ev->data.ext.len & ~SNDRV_SEQ_EXT_MASK) >= SNDRV_SEQ_MAX_EVENT_LEN)
972 case SNDRV_SEQ_EVENT_LENGTH_VARUSR:
973 if (! snd_seq_ev_is_instr_type(ev) ||
974 ! snd_seq_ev_is_direct(ev))
983 /* possible error values:
984 * -ENXIO invalid client or file open mode
985 * -ENOMEM malloc failed
986 * -EFAULT seg. fault during copy from user space
987 * -EINVAL invalid event
988 * -EAGAIN no space in output pool
989 * -EINTR interrupts while sleep
990 * -EMLINK too many hops
991 * others depends on return value from driver callback
993 static ssize_t snd_seq_write(struct file *file, const char __user *buf,
994 size_t count, loff_t *offset)
996 struct snd_seq_client *client = file->private_data;
997 int written = 0, len;
999 struct snd_seq_event event;
1001 if (!(snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_OUTPUT))
1004 /* check client structures are in place */
1005 snd_assert(client != NULL, return -ENXIO);
1007 if (!client->accept_output || client->pool == NULL)
1010 /* allocate the pool now if the pool is not allocated yet */
1011 if (client->pool->size > 0 && !snd_seq_write_pool_allocated(client)) {
1012 if (snd_seq_pool_init(client->pool) < 0)
1016 /* only process whole events */
1017 while (count >= sizeof(struct snd_seq_event)) {
1018 /* Read in the event header from the user */
1019 len = sizeof(event);
1020 if (copy_from_user(&event, buf, len)) {
1024 event.source.client = client->number; /* fill in client number */
1025 /* Check for extension data length */
1026 if (check_event_type_and_length(&event)) {
1031 /* check for special events */
1032 if (event.type == SNDRV_SEQ_EVENT_NONE)
1034 else if (snd_seq_ev_is_reserved(&event)) {
1039 if (snd_seq_ev_is_variable(&event)) {
1040 int extlen = event.data.ext.len & ~SNDRV_SEQ_EXT_MASK;
1041 if ((size_t)(extlen + len) > count) {
1042 /* back out, will get an error this time or next */
1046 /* set user space pointer */
1047 event.data.ext.len = extlen | SNDRV_SEQ_EXT_USRPTR;
1048 event.data.ext.ptr = (char __force *)buf
1049 + sizeof(struct snd_seq_event);
1050 len += extlen; /* increment data length */
1052 #ifdef CONFIG_COMPAT
1053 if (client->convert32 && snd_seq_ev_is_varusr(&event)) {
1054 void *ptr = compat_ptr(event.data.raw32.d[1]);
1055 event.data.ext.ptr = ptr;
1060 /* ok, enqueue it */
1061 err = snd_seq_client_enqueue_event(client, &event, file,
1062 !(file->f_flags & O_NONBLOCK),
1068 /* Update pointers and counts */
1074 return written ? written : err;
1081 static unsigned int snd_seq_poll(struct file *file, poll_table * wait)
1083 struct snd_seq_client *client = file->private_data;
1084 unsigned int mask = 0;
1086 /* check client structures are in place */
1087 snd_assert(client != NULL, return -ENXIO);
1089 if ((snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_INPUT) &&
1090 client->data.user.fifo) {
1092 /* check if data is available in the outqueue */
1093 if (snd_seq_fifo_poll_wait(client->data.user.fifo, file, wait))
1094 mask |= POLLIN | POLLRDNORM;
1097 if (snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_OUTPUT) {
1099 /* check if data is available in the pool */
1100 if (!snd_seq_write_pool_allocated(client) ||
1101 snd_seq_pool_poll_wait(client->pool, file, wait))
1102 mask |= POLLOUT | POLLWRNORM;
1109 /*-----------------------------------------------------*/
1112 /* SYSTEM_INFO ioctl() */
1113 static int snd_seq_ioctl_system_info(struct snd_seq_client *client, void __user *arg)
1115 struct snd_seq_system_info info;
1117 memset(&info, 0, sizeof(info));
1118 /* fill the info fields */
1119 info.queues = SNDRV_SEQ_MAX_QUEUES;
1120 info.clients = SNDRV_SEQ_MAX_CLIENTS;
1121 info.ports = 256; /* fixed limit */
1122 info.channels = 256; /* fixed limit */
1123 info.cur_clients = client_usage.cur;
1124 info.cur_queues = snd_seq_queue_get_cur_queues();
1126 if (copy_to_user(arg, &info, sizeof(info)))
1132 /* RUNNING_MODE ioctl() */
1133 static int snd_seq_ioctl_running_mode(struct snd_seq_client *client, void __user *arg)
1135 struct snd_seq_running_info info;
1136 struct snd_seq_client *cptr;
1139 if (copy_from_user(&info, arg, sizeof(info)))
1142 /* requested client number */
1143 cptr = snd_seq_client_use_ptr(info.client);
1145 return -ENOENT; /* don't change !!! */
1147 #ifdef SNDRV_BIG_ENDIAN
1148 if (! info.big_endian) {
1153 if (info.big_endian) {
1159 if (info.cpu_mode > sizeof(long)) {
1163 cptr->convert32 = (info.cpu_mode < sizeof(long));
1165 snd_seq_client_unlock(cptr);
1169 /* CLIENT_INFO ioctl() */
1170 static void get_client_info(struct snd_seq_client *cptr,
1171 struct snd_seq_client_info *info)
1173 info->client = cptr->number;
1175 /* fill the info fields */
1176 info->type = cptr->type;
1177 strcpy(info->name, cptr->name);
1178 info->filter = cptr->filter;
1179 info->event_lost = cptr->event_lost;
1180 memcpy(info->event_filter, cptr->event_filter, 32);
1181 info->num_ports = cptr->num_ports;
1182 memset(info->reserved, 0, sizeof(info->reserved));
1185 static int snd_seq_ioctl_get_client_info(struct snd_seq_client *client,
1188 struct snd_seq_client *cptr;
1189 struct snd_seq_client_info client_info;
1191 if (copy_from_user(&client_info, arg, sizeof(client_info)))
1194 /* requested client number */
1195 cptr = snd_seq_client_use_ptr(client_info.client);
1197 return -ENOENT; /* don't change !!! */
1199 get_client_info(cptr, &client_info);
1200 snd_seq_client_unlock(cptr);
1202 if (copy_to_user(arg, &client_info, sizeof(client_info)))
1208 /* CLIENT_INFO ioctl() */
1209 static int snd_seq_ioctl_set_client_info(struct snd_seq_client *client,
1212 struct snd_seq_client_info client_info;
1214 if (copy_from_user(&client_info, arg, sizeof(client_info)))
1217 /* it is not allowed to set the info fields for an another client */
1218 if (client->number != client_info.client)
1220 /* also client type must be set now */
1221 if (client->type != client_info.type)
1224 /* fill the info fields */
1225 if (client_info.name[0])
1226 strlcpy(client->name, client_info.name, sizeof(client->name));
1228 client->filter = client_info.filter;
1229 client->event_lost = client_info.event_lost;
1230 memcpy(client->event_filter, client_info.event_filter, 32);
1237 * CREATE PORT ioctl()
1239 static int snd_seq_ioctl_create_port(struct snd_seq_client *client,
1242 struct snd_seq_client_port *port;
1243 struct snd_seq_port_info info;
1244 struct snd_seq_port_callback *callback;
1246 if (copy_from_user(&info, arg, sizeof(info)))
1249 /* it is not allowed to create the port for an another client */
1250 if (info.addr.client != client->number)
1253 port = snd_seq_create_port(client, (info.flags & SNDRV_SEQ_PORT_FLG_GIVEN_PORT) ? info.addr.port : -1);
1257 if (client->type == USER_CLIENT && info.kernel) {
1258 snd_seq_delete_port(client, port->addr.port);
1261 if (client->type == KERNEL_CLIENT) {
1262 if ((callback = info.kernel) != NULL) {
1263 if (callback->owner)
1264 port->owner = callback->owner;
1265 port->private_data = callback->private_data;
1266 port->private_free = callback->private_free;
1267 port->callback_all = callback->callback_all;
1268 port->event_input = callback->event_input;
1269 port->c_src.open = callback->subscribe;
1270 port->c_src.close = callback->unsubscribe;
1271 port->c_dest.open = callback->use;
1272 port->c_dest.close = callback->unuse;
1276 info.addr = port->addr;
1278 snd_seq_set_port_info(port, &info);
1279 snd_seq_system_client_ev_port_start(port->addr.client, port->addr.port);
1281 if (copy_to_user(arg, &info, sizeof(info)))
1288 * DELETE PORT ioctl()
1290 static int snd_seq_ioctl_delete_port(struct snd_seq_client *client,
1293 struct snd_seq_port_info info;
1296 /* set passed parameters */
1297 if (copy_from_user(&info, arg, sizeof(info)))
1300 /* it is not allowed to remove the port for an another client */
1301 if (info.addr.client != client->number)
1304 err = snd_seq_delete_port(client, info.addr.port);
1306 snd_seq_system_client_ev_port_exit(client->number, info.addr.port);
1312 * GET_PORT_INFO ioctl() (on any client)
1314 static int snd_seq_ioctl_get_port_info(struct snd_seq_client *client,
1317 struct snd_seq_client *cptr;
1318 struct snd_seq_client_port *port;
1319 struct snd_seq_port_info info;
1321 if (copy_from_user(&info, arg, sizeof(info)))
1323 cptr = snd_seq_client_use_ptr(info.addr.client);
1327 port = snd_seq_port_use_ptr(cptr, info.addr.port);
1329 snd_seq_client_unlock(cptr);
1330 return -ENOENT; /* don't change */
1334 snd_seq_get_port_info(port, &info);
1335 snd_seq_port_unlock(port);
1336 snd_seq_client_unlock(cptr);
1338 if (copy_to_user(arg, &info, sizeof(info)))
1345 * SET_PORT_INFO ioctl() (only ports on this/own client)
1347 static int snd_seq_ioctl_set_port_info(struct snd_seq_client *client,
1350 struct snd_seq_client_port *port;
1351 struct snd_seq_port_info info;
1353 if (copy_from_user(&info, arg, sizeof(info)))
1356 if (info.addr.client != client->number) /* only set our own ports ! */
1358 port = snd_seq_port_use_ptr(client, info.addr.port);
1360 snd_seq_set_port_info(port, &info);
1361 snd_seq_port_unlock(port);
1368 * port subscription (connection)
1370 #define PERM_RD (SNDRV_SEQ_PORT_CAP_READ|SNDRV_SEQ_PORT_CAP_SUBS_READ)
1371 #define PERM_WR (SNDRV_SEQ_PORT_CAP_WRITE|SNDRV_SEQ_PORT_CAP_SUBS_WRITE)
1373 static int check_subscription_permission(struct snd_seq_client *client,
1374 struct snd_seq_client_port *sport,
1375 struct snd_seq_client_port *dport,
1376 struct snd_seq_port_subscribe *subs)
1378 if (client->number != subs->sender.client &&
1379 client->number != subs->dest.client) {
1380 /* connection by third client - check export permission */
1381 if (check_port_perm(sport, SNDRV_SEQ_PORT_CAP_NO_EXPORT))
1383 if (check_port_perm(dport, SNDRV_SEQ_PORT_CAP_NO_EXPORT))
1387 /* check read permission */
1388 /* if sender or receiver is the subscribing client itself,
1389 * no permission check is necessary
1391 if (client->number != subs->sender.client) {
1392 if (! check_port_perm(sport, PERM_RD))
1395 /* check write permission */
1396 if (client->number != subs->dest.client) {
1397 if (! check_port_perm(dport, PERM_WR))
1404 * send an subscription notify event to user client:
1405 * client must be user client.
1407 int snd_seq_client_notify_subscription(int client, int port,
1408 struct snd_seq_port_subscribe *info,
1411 struct snd_seq_event event;
1413 memset(&event, 0, sizeof(event));
1414 event.type = evtype;
1415 event.data.connect.dest = info->dest;
1416 event.data.connect.sender = info->sender;
1418 return snd_seq_system_notify(client, port, &event); /* non-atomic */
1423 * add to port's subscription list IOCTL interface
1425 static int snd_seq_ioctl_subscribe_port(struct snd_seq_client *client,
1428 int result = -EINVAL;
1429 struct snd_seq_client *receiver = NULL, *sender = NULL;
1430 struct snd_seq_client_port *sport = NULL, *dport = NULL;
1431 struct snd_seq_port_subscribe subs;
1433 if (copy_from_user(&subs, arg, sizeof(subs)))
1436 if ((receiver = snd_seq_client_use_ptr(subs.dest.client)) == NULL)
1438 if ((sender = snd_seq_client_use_ptr(subs.sender.client)) == NULL)
1440 if ((sport = snd_seq_port_use_ptr(sender, subs.sender.port)) == NULL)
1442 if ((dport = snd_seq_port_use_ptr(receiver, subs.dest.port)) == NULL)
1445 result = check_subscription_permission(client, sport, dport, &subs);
1450 result = snd_seq_port_connect(client, sender, sport, receiver, dport, &subs);
1451 if (! result) /* broadcast announce */
1452 snd_seq_client_notify_subscription(SNDRV_SEQ_ADDRESS_SUBSCRIBERS, 0,
1453 &subs, SNDRV_SEQ_EVENT_PORT_SUBSCRIBED);
1456 snd_seq_port_unlock(sport);
1458 snd_seq_port_unlock(dport);
1460 snd_seq_client_unlock(sender);
1462 snd_seq_client_unlock(receiver);
1468 * remove from port's subscription list
1470 static int snd_seq_ioctl_unsubscribe_port(struct snd_seq_client *client,
1473 int result = -ENXIO;
1474 struct snd_seq_client *receiver = NULL, *sender = NULL;
1475 struct snd_seq_client_port *sport = NULL, *dport = NULL;
1476 struct snd_seq_port_subscribe subs;
1478 if (copy_from_user(&subs, arg, sizeof(subs)))
1481 if ((receiver = snd_seq_client_use_ptr(subs.dest.client)) == NULL)
1483 if ((sender = snd_seq_client_use_ptr(subs.sender.client)) == NULL)
1485 if ((sport = snd_seq_port_use_ptr(sender, subs.sender.port)) == NULL)
1487 if ((dport = snd_seq_port_use_ptr(receiver, subs.dest.port)) == NULL)
1490 result = check_subscription_permission(client, sport, dport, &subs);
1494 result = snd_seq_port_disconnect(client, sender, sport, receiver, dport, &subs);
1495 if (! result) /* broadcast announce */
1496 snd_seq_client_notify_subscription(SNDRV_SEQ_ADDRESS_SUBSCRIBERS, 0,
1497 &subs, SNDRV_SEQ_EVENT_PORT_UNSUBSCRIBED);
1500 snd_seq_port_unlock(sport);
1502 snd_seq_port_unlock(dport);
1504 snd_seq_client_unlock(sender);
1506 snd_seq_client_unlock(receiver);
1511 /* CREATE_QUEUE ioctl() */
1512 static int snd_seq_ioctl_create_queue(struct snd_seq_client *client,
1515 struct snd_seq_queue_info info;
1517 struct snd_seq_queue *q;
1519 if (copy_from_user(&info, arg, sizeof(info)))
1522 result = snd_seq_queue_alloc(client->number, info.locked, info.flags);
1526 q = queueptr(result);
1530 info.queue = q->queue;
1531 info.locked = q->locked;
1532 info.owner = q->owner;
1534 /* set queue name */
1536 snprintf(info.name, sizeof(info.name), "Queue-%d", q->queue);
1537 strlcpy(q->name, info.name, sizeof(q->name));
1540 if (copy_to_user(arg, &info, sizeof(info)))
1546 /* DELETE_QUEUE ioctl() */
1547 static int snd_seq_ioctl_delete_queue(struct snd_seq_client *client,
1550 struct snd_seq_queue_info info;
1552 if (copy_from_user(&info, arg, sizeof(info)))
1555 return snd_seq_queue_delete(client->number, info.queue);
1558 /* GET_QUEUE_INFO ioctl() */
1559 static int snd_seq_ioctl_get_queue_info(struct snd_seq_client *client,
1562 struct snd_seq_queue_info info;
1563 struct snd_seq_queue *q;
1565 if (copy_from_user(&info, arg, sizeof(info)))
1568 q = queueptr(info.queue);
1572 memset(&info, 0, sizeof(info));
1573 info.queue = q->queue;
1574 info.owner = q->owner;
1575 info.locked = q->locked;
1576 strlcpy(info.name, q->name, sizeof(info.name));
1579 if (copy_to_user(arg, &info, sizeof(info)))
1585 /* SET_QUEUE_INFO ioctl() */
1586 static int snd_seq_ioctl_set_queue_info(struct snd_seq_client *client,
1589 struct snd_seq_queue_info info;
1590 struct snd_seq_queue *q;
1592 if (copy_from_user(&info, arg, sizeof(info)))
1595 if (info.owner != client->number)
1598 /* change owner/locked permission */
1599 if (snd_seq_queue_check_access(info.queue, client->number)) {
1600 if (snd_seq_queue_set_owner(info.queue, client->number, info.locked) < 0)
1603 snd_seq_queue_use(info.queue, client->number, 1);
1608 q = queueptr(info.queue);
1611 if (q->owner != client->number) {
1615 strlcpy(q->name, info.name, sizeof(q->name));
1621 /* GET_NAMED_QUEUE ioctl() */
1622 static int snd_seq_ioctl_get_named_queue(struct snd_seq_client *client, void __user *arg)
1624 struct snd_seq_queue_info info;
1625 struct snd_seq_queue *q;
1627 if (copy_from_user(&info, arg, sizeof(info)))
1630 q = snd_seq_queue_find_name(info.name);
1633 info.queue = q->queue;
1634 info.owner = q->owner;
1635 info.locked = q->locked;
1638 if (copy_to_user(arg, &info, sizeof(info)))
1644 /* GET_QUEUE_STATUS ioctl() */
1645 static int snd_seq_ioctl_get_queue_status(struct snd_seq_client *client,
1648 struct snd_seq_queue_status status;
1649 struct snd_seq_queue *queue;
1650 struct snd_seq_timer *tmr;
1652 if (copy_from_user(&status, arg, sizeof(status)))
1655 queue = queueptr(status.queue);
1658 memset(&status, 0, sizeof(status));
1659 status.queue = queue->queue;
1662 status.events = queue->tickq->cells + queue->timeq->cells;
1664 status.time = snd_seq_timer_get_cur_time(tmr);
1665 status.tick = snd_seq_timer_get_cur_tick(tmr);
1667 status.running = tmr->running;
1669 status.flags = queue->flags;
1672 if (copy_to_user(arg, &status, sizeof(status)))
1678 /* GET_QUEUE_TEMPO ioctl() */
1679 static int snd_seq_ioctl_get_queue_tempo(struct snd_seq_client *client,
1682 struct snd_seq_queue_tempo tempo;
1683 struct snd_seq_queue *queue;
1684 struct snd_seq_timer *tmr;
1686 if (copy_from_user(&tempo, arg, sizeof(tempo)))
1689 queue = queueptr(tempo.queue);
1692 memset(&tempo, 0, sizeof(tempo));
1693 tempo.queue = queue->queue;
1697 tempo.tempo = tmr->tempo;
1698 tempo.ppq = tmr->ppq;
1699 tempo.skew_value = tmr->skew;
1700 tempo.skew_base = tmr->skew_base;
1703 if (copy_to_user(arg, &tempo, sizeof(tempo)))
1709 /* SET_QUEUE_TEMPO ioctl() */
1710 int snd_seq_set_queue_tempo(int client, struct snd_seq_queue_tempo *tempo)
1712 if (!snd_seq_queue_check_access(tempo->queue, client))
1714 return snd_seq_queue_timer_set_tempo(tempo->queue, client, tempo);
1717 EXPORT_SYMBOL(snd_seq_set_queue_tempo);
1719 static int snd_seq_ioctl_set_queue_tempo(struct snd_seq_client *client,
1723 struct snd_seq_queue_tempo tempo;
1725 if (copy_from_user(&tempo, arg, sizeof(tempo)))
1728 result = snd_seq_set_queue_tempo(client->number, &tempo);
1729 return result < 0 ? result : 0;
1733 /* GET_QUEUE_TIMER ioctl() */
1734 static int snd_seq_ioctl_get_queue_timer(struct snd_seq_client *client,
1737 struct snd_seq_queue_timer timer;
1738 struct snd_seq_queue *queue;
1739 struct snd_seq_timer *tmr;
1741 if (copy_from_user(&timer, arg, sizeof(timer)))
1744 queue = queueptr(timer.queue);
1748 if (mutex_lock_interruptible(&queue->timer_mutex)) {
1750 return -ERESTARTSYS;
1753 memset(&timer, 0, sizeof(timer));
1754 timer.queue = queue->queue;
1756 timer.type = tmr->type;
1757 if (tmr->type == SNDRV_SEQ_TIMER_ALSA) {
1758 timer.u.alsa.id = tmr->alsa_id;
1759 timer.u.alsa.resolution = tmr->preferred_resolution;
1761 mutex_unlock(&queue->timer_mutex);
1764 if (copy_to_user(arg, &timer, sizeof(timer)))
1770 /* SET_QUEUE_TIMER ioctl() */
1771 static int snd_seq_ioctl_set_queue_timer(struct snd_seq_client *client,
1775 struct snd_seq_queue_timer timer;
1777 if (copy_from_user(&timer, arg, sizeof(timer)))
1780 if (timer.type != SNDRV_SEQ_TIMER_ALSA)
1783 if (snd_seq_queue_check_access(timer.queue, client->number)) {
1784 struct snd_seq_queue *q;
1785 struct snd_seq_timer *tmr;
1787 q = queueptr(timer.queue);
1790 if (mutex_lock_interruptible(&q->timer_mutex)) {
1792 return -ERESTARTSYS;
1795 snd_seq_queue_timer_close(timer.queue);
1796 tmr->type = timer.type;
1797 if (tmr->type == SNDRV_SEQ_TIMER_ALSA) {
1798 tmr->alsa_id = timer.u.alsa.id;
1799 tmr->preferred_resolution = timer.u.alsa.resolution;
1801 result = snd_seq_queue_timer_open(timer.queue);
1802 mutex_unlock(&q->timer_mutex);
1812 /* GET_QUEUE_CLIENT ioctl() */
1813 static int snd_seq_ioctl_get_queue_client(struct snd_seq_client *client,
1816 struct snd_seq_queue_client info;
1819 if (copy_from_user(&info, arg, sizeof(info)))
1822 used = snd_seq_queue_is_used(info.queue, client->number);
1826 info.client = client->number;
1828 if (copy_to_user(arg, &info, sizeof(info)))
1834 /* SET_QUEUE_CLIENT ioctl() */
1835 static int snd_seq_ioctl_set_queue_client(struct snd_seq_client *client,
1839 struct snd_seq_queue_client info;
1841 if (copy_from_user(&info, arg, sizeof(info)))
1844 if (info.used >= 0) {
1845 err = snd_seq_queue_use(info.queue, client->number, info.used);
1850 return snd_seq_ioctl_get_queue_client(client, arg);
1854 /* GET_CLIENT_POOL ioctl() */
1855 static int snd_seq_ioctl_get_client_pool(struct snd_seq_client *client,
1858 struct snd_seq_client_pool info;
1859 struct snd_seq_client *cptr;
1861 if (copy_from_user(&info, arg, sizeof(info)))
1864 cptr = snd_seq_client_use_ptr(info.client);
1867 memset(&info, 0, sizeof(info));
1868 info.output_pool = cptr->pool->size;
1869 info.output_room = cptr->pool->room;
1870 info.output_free = info.output_pool;
1871 info.output_free = snd_seq_unused_cells(cptr->pool);
1872 if (cptr->type == USER_CLIENT) {
1873 info.input_pool = cptr->data.user.fifo_pool_size;
1874 info.input_free = info.input_pool;
1875 if (cptr->data.user.fifo)
1876 info.input_free = snd_seq_unused_cells(cptr->data.user.fifo->pool);
1878 info.input_pool = 0;
1879 info.input_free = 0;
1881 snd_seq_client_unlock(cptr);
1883 if (copy_to_user(arg, &info, sizeof(info)))
1888 /* SET_CLIENT_POOL ioctl() */
1889 static int snd_seq_ioctl_set_client_pool(struct snd_seq_client *client,
1892 struct snd_seq_client_pool info;
1895 if (copy_from_user(&info, arg, sizeof(info)))
1898 if (client->number != info.client)
1899 return -EINVAL; /* can't change other clients */
1901 if (info.output_pool >= 1 && info.output_pool <= SNDRV_SEQ_MAX_EVENTS &&
1902 (! snd_seq_write_pool_allocated(client) ||
1903 info.output_pool != client->pool->size)) {
1904 if (snd_seq_write_pool_allocated(client)) {
1905 /* remove all existing cells */
1906 snd_seq_queue_client_leave_cells(client->number);
1907 snd_seq_pool_done(client->pool);
1909 client->pool->size = info.output_pool;
1910 rc = snd_seq_pool_init(client->pool);
1914 if (client->type == USER_CLIENT && client->data.user.fifo != NULL &&
1915 info.input_pool >= 1 &&
1916 info.input_pool <= SNDRV_SEQ_MAX_CLIENT_EVENTS &&
1917 info.input_pool != client->data.user.fifo_pool_size) {
1918 /* change pool size */
1919 rc = snd_seq_fifo_resize(client->data.user.fifo, info.input_pool);
1922 client->data.user.fifo_pool_size = info.input_pool;
1924 if (info.output_room >= 1 &&
1925 info.output_room <= client->pool->size) {
1926 client->pool->room = info.output_room;
1929 return snd_seq_ioctl_get_client_pool(client, arg);
1933 /* REMOVE_EVENTS ioctl() */
1934 static int snd_seq_ioctl_remove_events(struct snd_seq_client *client,
1937 struct snd_seq_remove_events info;
1939 if (copy_from_user(&info, arg, sizeof(info)))
1943 * Input mostly not implemented XXX.
1945 if (info.remove_mode & SNDRV_SEQ_REMOVE_INPUT) {
1947 * No restrictions so for a user client we can clear
1950 if (client->type == USER_CLIENT)
1951 snd_seq_fifo_clear(client->data.user.fifo);
1954 if (info.remove_mode & SNDRV_SEQ_REMOVE_OUTPUT)
1955 snd_seq_queue_remove_cells(client->number, &info);
1962 * get subscription info
1964 static int snd_seq_ioctl_get_subscription(struct snd_seq_client *client,
1968 struct snd_seq_client *sender = NULL;
1969 struct snd_seq_client_port *sport = NULL;
1970 struct snd_seq_port_subscribe subs;
1971 struct snd_seq_subscribers *p;
1973 if (copy_from_user(&subs, arg, sizeof(subs)))
1977 if ((sender = snd_seq_client_use_ptr(subs.sender.client)) == NULL)
1979 if ((sport = snd_seq_port_use_ptr(sender, subs.sender.port)) == NULL)
1981 p = snd_seq_port_get_subscription(&sport->c_src, &subs.dest);
1990 snd_seq_port_unlock(sport);
1992 snd_seq_client_unlock(sender);
1994 if (copy_to_user(arg, &subs, sizeof(subs)))
2002 * get subscription info - check only its presence
2004 static int snd_seq_ioctl_query_subs(struct snd_seq_client *client,
2007 int result = -ENXIO;
2008 struct snd_seq_client *cptr = NULL;
2009 struct snd_seq_client_port *port = NULL;
2010 struct snd_seq_query_subs subs;
2011 struct snd_seq_port_subs_info *group;
2012 struct list_head *p;
2015 if (copy_from_user(&subs, arg, sizeof(subs)))
2018 if ((cptr = snd_seq_client_use_ptr(subs.root.client)) == NULL)
2020 if ((port = snd_seq_port_use_ptr(cptr, subs.root.port)) == NULL)
2023 switch (subs.type) {
2024 case SNDRV_SEQ_QUERY_SUBS_READ:
2025 group = &port->c_src;
2027 case SNDRV_SEQ_QUERY_SUBS_WRITE:
2028 group = &port->c_dest;
2034 down_read(&group->list_mutex);
2035 /* search for the subscriber */
2036 subs.num_subs = group->count;
2039 list_for_each(p, &group->list_head) {
2040 if (i++ == subs.index) {
2042 struct snd_seq_subscribers *s;
2043 if (subs.type == SNDRV_SEQ_QUERY_SUBS_READ) {
2044 s = list_entry(p, struct snd_seq_subscribers, src_list);
2045 subs.addr = s->info.dest;
2047 s = list_entry(p, struct snd_seq_subscribers, dest_list);
2048 subs.addr = s->info.sender;
2050 subs.flags = s->info.flags;
2051 subs.queue = s->info.queue;
2056 up_read(&group->list_mutex);
2060 snd_seq_port_unlock(port);
2062 snd_seq_client_unlock(cptr);
2064 if (copy_to_user(arg, &subs, sizeof(subs)))
2074 static int snd_seq_ioctl_query_next_client(struct snd_seq_client *client,
2077 struct snd_seq_client *cptr = NULL;
2078 struct snd_seq_client_info info;
2080 if (copy_from_user(&info, arg, sizeof(info)))
2083 /* search for next client */
2085 if (info.client < 0)
2087 for (; info.client < SNDRV_SEQ_MAX_CLIENTS; info.client++) {
2088 cptr = snd_seq_client_use_ptr(info.client);
2095 get_client_info(cptr, &info);
2096 snd_seq_client_unlock(cptr);
2098 if (copy_to_user(arg, &info, sizeof(info)))
2106 static int snd_seq_ioctl_query_next_port(struct snd_seq_client *client,
2109 struct snd_seq_client *cptr;
2110 struct snd_seq_client_port *port = NULL;
2111 struct snd_seq_port_info info;
2113 if (copy_from_user(&info, arg, sizeof(info)))
2115 cptr = snd_seq_client_use_ptr(info.addr.client);
2119 /* search for next port */
2121 port = snd_seq_port_query_nearest(cptr, &info);
2123 snd_seq_client_unlock(cptr);
2128 info.addr = port->addr;
2129 snd_seq_get_port_info(port, &info);
2130 snd_seq_port_unlock(port);
2131 snd_seq_client_unlock(cptr);
2133 if (copy_to_user(arg, &info, sizeof(info)))
2138 /* -------------------------------------------------------- */
2140 static struct seq_ioctl_table {
2142 int (*func)(struct snd_seq_client *client, void __user * arg);
2143 } ioctl_tables[] = {
2144 { SNDRV_SEQ_IOCTL_SYSTEM_INFO, snd_seq_ioctl_system_info },
2145 { SNDRV_SEQ_IOCTL_RUNNING_MODE, snd_seq_ioctl_running_mode },
2146 { SNDRV_SEQ_IOCTL_GET_CLIENT_INFO, snd_seq_ioctl_get_client_info },
2147 { SNDRV_SEQ_IOCTL_SET_CLIENT_INFO, snd_seq_ioctl_set_client_info },
2148 { SNDRV_SEQ_IOCTL_CREATE_PORT, snd_seq_ioctl_create_port },
2149 { SNDRV_SEQ_IOCTL_DELETE_PORT, snd_seq_ioctl_delete_port },
2150 { SNDRV_SEQ_IOCTL_GET_PORT_INFO, snd_seq_ioctl_get_port_info },
2151 { SNDRV_SEQ_IOCTL_SET_PORT_INFO, snd_seq_ioctl_set_port_info },
2152 { SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT, snd_seq_ioctl_subscribe_port },
2153 { SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT, snd_seq_ioctl_unsubscribe_port },
2154 { SNDRV_SEQ_IOCTL_CREATE_QUEUE, snd_seq_ioctl_create_queue },
2155 { SNDRV_SEQ_IOCTL_DELETE_QUEUE, snd_seq_ioctl_delete_queue },
2156 { SNDRV_SEQ_IOCTL_GET_QUEUE_INFO, snd_seq_ioctl_get_queue_info },
2157 { SNDRV_SEQ_IOCTL_SET_QUEUE_INFO, snd_seq_ioctl_set_queue_info },
2158 { SNDRV_SEQ_IOCTL_GET_NAMED_QUEUE, snd_seq_ioctl_get_named_queue },
2159 { SNDRV_SEQ_IOCTL_GET_QUEUE_STATUS, snd_seq_ioctl_get_queue_status },
2160 { SNDRV_SEQ_IOCTL_GET_QUEUE_TEMPO, snd_seq_ioctl_get_queue_tempo },
2161 { SNDRV_SEQ_IOCTL_SET_QUEUE_TEMPO, snd_seq_ioctl_set_queue_tempo },
2162 { SNDRV_SEQ_IOCTL_GET_QUEUE_TIMER, snd_seq_ioctl_get_queue_timer },
2163 { SNDRV_SEQ_IOCTL_SET_QUEUE_TIMER, snd_seq_ioctl_set_queue_timer },
2164 { SNDRV_SEQ_IOCTL_GET_QUEUE_CLIENT, snd_seq_ioctl_get_queue_client },
2165 { SNDRV_SEQ_IOCTL_SET_QUEUE_CLIENT, snd_seq_ioctl_set_queue_client },
2166 { SNDRV_SEQ_IOCTL_GET_CLIENT_POOL, snd_seq_ioctl_get_client_pool },
2167 { SNDRV_SEQ_IOCTL_SET_CLIENT_POOL, snd_seq_ioctl_set_client_pool },
2168 { SNDRV_SEQ_IOCTL_GET_SUBSCRIPTION, snd_seq_ioctl_get_subscription },
2169 { SNDRV_SEQ_IOCTL_QUERY_NEXT_CLIENT, snd_seq_ioctl_query_next_client },
2170 { SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT, snd_seq_ioctl_query_next_port },
2171 { SNDRV_SEQ_IOCTL_REMOVE_EVENTS, snd_seq_ioctl_remove_events },
2172 { SNDRV_SEQ_IOCTL_QUERY_SUBS, snd_seq_ioctl_query_subs },
2176 static int snd_seq_do_ioctl(struct snd_seq_client *client, unsigned int cmd,
2179 struct seq_ioctl_table *p;
2182 case SNDRV_SEQ_IOCTL_PVERSION:
2183 /* return sequencer version number */
2184 return put_user(SNDRV_SEQ_VERSION, (int __user *)arg) ? -EFAULT : 0;
2185 case SNDRV_SEQ_IOCTL_CLIENT_ID:
2186 /* return the id of this client */
2187 return put_user(client->number, (int __user *)arg) ? -EFAULT : 0;
2192 for (p = ioctl_tables; p->cmd; p++) {
2194 return p->func(client, arg);
2196 snd_printd("seq unknown ioctl() 0x%x (type='%c', number=0x%2x)\n",
2197 cmd, _IOC_TYPE(cmd), _IOC_NR(cmd));
2202 static long snd_seq_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2204 struct snd_seq_client *client = file->private_data;
2206 snd_assert(client != NULL, return -ENXIO);
2208 return snd_seq_do_ioctl(client, cmd, (void __user *) arg);
2211 #ifdef CONFIG_COMPAT
2212 #include "seq_compat.c"
2214 #define snd_seq_ioctl_compat NULL
2217 /* -------------------------------------------------------- */
2220 /* exported to kernel modules */
2221 int snd_seq_create_kernel_client(struct snd_card *card, int client_index,
2222 const char *name_fmt, ...)
2224 struct snd_seq_client *client;
2227 snd_assert(! in_interrupt(), return -EBUSY);
2229 if (card && client_index >= SNDRV_SEQ_CLIENTS_PER_CARD)
2231 if (card == NULL && client_index >= SNDRV_SEQ_GLOBAL_CLIENTS)
2234 if (mutex_lock_interruptible(®ister_mutex))
2235 return -ERESTARTSYS;
2238 client_index += SNDRV_SEQ_GLOBAL_CLIENTS
2239 + card->number * SNDRV_SEQ_CLIENTS_PER_CARD;
2240 if (client_index >= SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN)
2244 /* empty write queue as default */
2245 client = seq_create_client1(client_index, 0);
2246 if (client == NULL) {
2247 mutex_unlock(®ister_mutex);
2248 return -EBUSY; /* failure code */
2250 usage_alloc(&client_usage, 1);
2252 client->accept_input = 1;
2253 client->accept_output = 1;
2255 va_start(args, name_fmt);
2256 vsnprintf(client->name, sizeof(client->name), name_fmt, args);
2259 client->type = KERNEL_CLIENT;
2260 mutex_unlock(®ister_mutex);
2262 /* make others aware this new client */
2263 snd_seq_system_client_ev_client_start(client->number);
2265 /* return client number to caller */
2266 return client->number;
2269 EXPORT_SYMBOL(snd_seq_create_kernel_client);
2271 /* exported to kernel modules */
2272 int snd_seq_delete_kernel_client(int client)
2274 struct snd_seq_client *ptr;
2276 snd_assert(! in_interrupt(), return -EBUSY);
2278 ptr = clientptr(client);
2282 seq_free_client(ptr);
2287 EXPORT_SYMBOL(snd_seq_delete_kernel_client);
2289 /* skeleton to enqueue event, called from snd_seq_kernel_client_enqueue
2290 * and snd_seq_kernel_client_enqueue_blocking
2292 static int kernel_client_enqueue(int client, struct snd_seq_event *ev,
2293 struct file *file, int blocking,
2294 int atomic, int hop)
2296 struct snd_seq_client *cptr;
2299 snd_assert(ev != NULL, return -EINVAL);
2301 if (ev->type == SNDRV_SEQ_EVENT_NONE)
2302 return 0; /* ignore this */
2303 if (ev->type == SNDRV_SEQ_EVENT_KERNEL_ERROR)
2304 return -EINVAL; /* quoted events can't be enqueued */
2306 /* fill in client number */
2307 ev->source.client = client;
2309 if (check_event_type_and_length(ev))
2312 cptr = snd_seq_client_use_ptr(client);
2316 if (! cptr->accept_output)
2319 result = snd_seq_client_enqueue_event(cptr, ev, file, blocking, atomic, hop);
2321 snd_seq_client_unlock(cptr);
2326 * exported, called by kernel clients to enqueue events (w/o blocking)
2328 * RETURN VALUE: zero if succeed, negative if error
2330 int snd_seq_kernel_client_enqueue(int client, struct snd_seq_event * ev,
2331 int atomic, int hop)
2333 return kernel_client_enqueue(client, ev, NULL, 0, atomic, hop);
2336 EXPORT_SYMBOL(snd_seq_kernel_client_enqueue);
2339 * exported, called by kernel clients to enqueue events (with blocking)
2341 * RETURN VALUE: zero if succeed, negative if error
2343 int snd_seq_kernel_client_enqueue_blocking(int client, struct snd_seq_event * ev,
2345 int atomic, int hop)
2347 return kernel_client_enqueue(client, ev, file, 1, atomic, hop);
2350 EXPORT_SYMBOL(snd_seq_kernel_client_enqueue_blocking);
2353 * exported, called by kernel clients to dispatch events directly to other
2354 * clients, bypassing the queues. Event time-stamp will be updated.
2356 * RETURN VALUE: negative = delivery failed,
2357 * zero, or positive: the number of delivered events
2359 int snd_seq_kernel_client_dispatch(int client, struct snd_seq_event * ev,
2360 int atomic, int hop)
2362 struct snd_seq_client *cptr;
2365 snd_assert(ev != NULL, return -EINVAL);
2367 /* fill in client number */
2368 ev->queue = SNDRV_SEQ_QUEUE_DIRECT;
2369 ev->source.client = client;
2371 if (check_event_type_and_length(ev))
2374 cptr = snd_seq_client_use_ptr(client);
2378 if (!cptr->accept_output)
2381 result = snd_seq_deliver_event(cptr, ev, atomic, hop);
2383 snd_seq_client_unlock(cptr);
2387 EXPORT_SYMBOL(snd_seq_kernel_client_dispatch);
2390 * exported, called by kernel clients to perform same functions as with
2393 int snd_seq_kernel_client_ctl(int clientid, unsigned int cmd, void *arg)
2395 struct snd_seq_client *client;
2399 client = clientptr(clientid);
2402 fs = snd_enter_user();
2403 result = snd_seq_do_ioctl(client, cmd, (void __user *)arg);
2408 EXPORT_SYMBOL(snd_seq_kernel_client_ctl);
2410 /* exported (for OSS emulator) */
2411 int snd_seq_kernel_client_write_poll(int clientid, struct file *file, poll_table *wait)
2413 struct snd_seq_client *client;
2415 client = clientptr(clientid);
2419 if (! snd_seq_write_pool_allocated(client))
2421 if (snd_seq_pool_poll_wait(client->pool, file, wait))
2426 EXPORT_SYMBOL(snd_seq_kernel_client_write_poll);
2428 /*---------------------------------------------------------------------------*/
2430 #ifdef CONFIG_PROC_FS
2434 static void snd_seq_info_dump_subscribers(struct snd_info_buffer *buffer,
2435 struct snd_seq_port_subs_info *group,
2436 int is_src, char *msg)
2438 struct list_head *p;
2439 struct snd_seq_subscribers *s;
2442 down_read(&group->list_mutex);
2443 if (list_empty(&group->list_head)) {
2444 up_read(&group->list_mutex);
2447 snd_iprintf(buffer, msg);
2448 list_for_each(p, &group->list_head) {
2450 s = list_entry(p, struct snd_seq_subscribers, src_list);
2452 s = list_entry(p, struct snd_seq_subscribers, dest_list);
2454 snd_iprintf(buffer, ", ");
2455 snd_iprintf(buffer, "%d:%d",
2456 is_src ? s->info.dest.client : s->info.sender.client,
2457 is_src ? s->info.dest.port : s->info.sender.port);
2458 if (s->info.flags & SNDRV_SEQ_PORT_SUBS_TIMESTAMP)
2459 snd_iprintf(buffer, "[%c:%d]", ((s->info.flags & SNDRV_SEQ_PORT_SUBS_TIME_REAL) ? 'r' : 't'), s->info.queue);
2460 if (group->exclusive)
2461 snd_iprintf(buffer, "[ex]");
2463 up_read(&group->list_mutex);
2464 snd_iprintf(buffer, "\n");
2467 #define FLAG_PERM_RD(perm) ((perm) & SNDRV_SEQ_PORT_CAP_READ ? ((perm) & SNDRV_SEQ_PORT_CAP_SUBS_READ ? 'R' : 'r') : '-')
2468 #define FLAG_PERM_WR(perm) ((perm) & SNDRV_SEQ_PORT_CAP_WRITE ? ((perm) & SNDRV_SEQ_PORT_CAP_SUBS_WRITE ? 'W' : 'w') : '-')
2469 #define FLAG_PERM_EX(perm) ((perm) & SNDRV_SEQ_PORT_CAP_NO_EXPORT ? '-' : 'e')
2471 #define FLAG_PERM_DUPLEX(perm) ((perm) & SNDRV_SEQ_PORT_CAP_DUPLEX ? 'X' : '-')
2473 static void snd_seq_info_dump_ports(struct snd_info_buffer *buffer,
2474 struct snd_seq_client *client)
2476 struct list_head *l;
2478 mutex_lock(&client->ports_mutex);
2479 list_for_each(l, &client->ports_list_head) {
2480 struct snd_seq_client_port *p = list_entry(l, struct snd_seq_client_port, list);
2481 snd_iprintf(buffer, " Port %3d : \"%s\" (%c%c%c%c)\n",
2482 p->addr.port, p->name,
2483 FLAG_PERM_RD(p->capability),
2484 FLAG_PERM_WR(p->capability),
2485 FLAG_PERM_EX(p->capability),
2486 FLAG_PERM_DUPLEX(p->capability));
2487 snd_seq_info_dump_subscribers(buffer, &p->c_src, 1, " Connecting To: ");
2488 snd_seq_info_dump_subscribers(buffer, &p->c_dest, 0, " Connected From: ");
2490 mutex_unlock(&client->ports_mutex);
2494 void snd_seq_info_pool(struct snd_info_buffer *buffer,
2495 struct snd_seq_pool *pool, char *space);
2497 /* exported to seq_info.c */
2498 void snd_seq_info_clients_read(struct snd_info_entry *entry,
2499 struct snd_info_buffer *buffer)
2502 struct snd_seq_client *client;
2504 snd_iprintf(buffer, "Client info\n");
2505 snd_iprintf(buffer, " cur clients : %d\n", client_usage.cur);
2506 snd_iprintf(buffer, " peak clients : %d\n", client_usage.peak);
2507 snd_iprintf(buffer, " max clients : %d\n", SNDRV_SEQ_MAX_CLIENTS);
2508 snd_iprintf(buffer, "\n");
2510 /* list the client table */
2511 for (c = 0; c < SNDRV_SEQ_MAX_CLIENTS; c++) {
2512 client = snd_seq_client_use_ptr(c);
2515 if (client->type == NO_CLIENT) {
2516 snd_seq_client_unlock(client);
2520 snd_iprintf(buffer, "Client %3d : \"%s\" [%s]\n",
2522 client->type == USER_CLIENT ? "User" : "Kernel");
2523 snd_seq_info_dump_ports(buffer, client);
2524 if (snd_seq_write_pool_allocated(client)) {
2525 snd_iprintf(buffer, " Output pool :\n");
2526 snd_seq_info_pool(buffer, client->pool, " ");
2528 if (client->type == USER_CLIENT && client->data.user.fifo &&
2529 client->data.user.fifo->pool) {
2530 snd_iprintf(buffer, " Input pool :\n");
2531 snd_seq_info_pool(buffer, client->data.user.fifo->pool, " ");
2533 snd_seq_client_unlock(client);
2536 #endif /* CONFIG_PROC_FS */
2538 /*---------------------------------------------------------------------------*/
2545 static struct file_operations snd_seq_f_ops =
2547 .owner = THIS_MODULE,
2548 .read = snd_seq_read,
2549 .write = snd_seq_write,
2550 .open = snd_seq_open,
2551 .release = snd_seq_release,
2552 .poll = snd_seq_poll,
2553 .unlocked_ioctl = snd_seq_ioctl,
2554 .compat_ioctl = snd_seq_ioctl_compat,
2558 * register sequencer device
2560 int __init snd_sequencer_device_init(void)
2564 if (mutex_lock_interruptible(®ister_mutex))
2565 return -ERESTARTSYS;
2567 if ((err = snd_register_device(SNDRV_DEVICE_TYPE_SEQUENCER, NULL, 0,
2568 &snd_seq_f_ops, NULL, "seq")) < 0) {
2569 mutex_unlock(®ister_mutex);
2573 mutex_unlock(®ister_mutex);
2581 * unregister sequencer device
2583 void __exit snd_sequencer_device_done(void)
2585 snd_unregister_device(SNDRV_DEVICE_TYPE_SEQUENCER, NULL, 0);