2 * ALSA sequencer Client Manager
3 * Copyright (c) 1998-2001 by Frank van de Pol <fvdpol@coil.demon.nl>
4 * Jaroslav Kysela <perex@perex.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 <linux/init.h>
25 #include <linux/export.h>
26 #include <linux/slab.h>
27 #include <sound/core.h>
28 #include <sound/minors.h>
29 #include <linux/kmod.h>
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"
37 #include "seq_system.h"
38 #include <sound/seq_device.h>
40 #include <linux/compat.h>
45 * this module handles the connections of userland and kernel clients
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
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
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)
68 static DEFINE_SPINLOCK(clients_lock);
69 static DEFINE_MUTEX(register_mutex);
74 static char clienttablock[SNDRV_SEQ_MAX_CLIENTS];
75 static struct snd_seq_client *clienttab[SNDRV_SEQ_MAX_CLIENTS];
76 static struct snd_seq_usage client_usage;
81 static int bounce_error_event(struct snd_seq_client *client,
82 struct snd_seq_event *event,
83 int err, int atomic, int hop);
84 static int snd_seq_deliver_single_event(struct snd_seq_client *client,
85 struct snd_seq_event *event,
86 int filter, int atomic, int hop);
90 static inline unsigned short snd_seq_file_flags(struct file *file)
92 switch (file->f_mode & (FMODE_READ | FMODE_WRITE)) {
94 return SNDRV_SEQ_LFLG_OUTPUT;
96 return SNDRV_SEQ_LFLG_INPUT;
98 return SNDRV_SEQ_LFLG_OPEN;
102 static inline int snd_seq_write_pool_allocated(struct snd_seq_client *client)
104 return snd_seq_total_cells(client->pool) > 0;
107 /* return pointer to client structure for specified id */
108 static struct snd_seq_client *clientptr(int clientid)
110 if (clientid < 0 || clientid >= SNDRV_SEQ_MAX_CLIENTS) {
111 pr_debug("ALSA: seq: oops. Trying to get pointer to client %d\n",
115 return clienttab[clientid];
118 struct snd_seq_client *snd_seq_client_use_ptr(int clientid)
121 struct snd_seq_client *client;
123 if (clientid < 0 || clientid >= SNDRV_SEQ_MAX_CLIENTS) {
124 pr_debug("ALSA: seq: oops. Trying to get pointer to client %d\n",
128 spin_lock_irqsave(&clients_lock, flags);
129 client = clientptr(clientid);
132 if (clienttablock[clientid]) {
133 spin_unlock_irqrestore(&clients_lock, flags);
136 spin_unlock_irqrestore(&clients_lock, flags);
137 #ifdef CONFIG_MODULES
138 if (!in_interrupt()) {
139 static char client_requested[SNDRV_SEQ_GLOBAL_CLIENTS];
140 static char card_requested[SNDRV_CARDS];
141 if (clientid < SNDRV_SEQ_GLOBAL_CLIENTS) {
144 if (!client_requested[clientid]) {
145 client_requested[clientid] = 1;
146 for (idx = 0; idx < 15; idx++) {
147 if (seq_client_load[idx] < 0)
149 if (seq_client_load[idx] == clientid) {
150 request_module("snd-seq-client-%i",
156 } else if (clientid < SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN) {
157 int card = (clientid - SNDRV_SEQ_GLOBAL_CLIENTS) /
158 SNDRV_SEQ_CLIENTS_PER_CARD;
159 if (card < snd_ecards_limit) {
160 if (! card_requested[card]) {
161 card_requested[card] = 1;
162 snd_request_card(card);
164 snd_seq_device_load_drivers();
167 spin_lock_irqsave(&clients_lock, flags);
168 client = clientptr(clientid);
171 spin_unlock_irqrestore(&clients_lock, flags);
177 snd_use_lock_use(&client->use_lock);
178 spin_unlock_irqrestore(&clients_lock, flags);
182 static void usage_alloc(struct snd_seq_usage *res, int num)
185 if (res->cur > res->peak)
186 res->peak = res->cur;
189 static void usage_free(struct snd_seq_usage *res, int num)
194 /* initialise data structures */
195 int __init client_init_data(void)
197 /* zap out the client table */
198 memset(&clienttablock, 0, sizeof(clienttablock));
199 memset(&clienttab, 0, sizeof(clienttab));
204 static struct snd_seq_client *seq_create_client1(int client_index, int poolsize)
208 struct snd_seq_client *client;
210 /* init client data */
211 client = kzalloc(sizeof(*client), GFP_KERNEL);
214 client->pool = snd_seq_pool_new(poolsize);
215 if (client->pool == NULL) {
219 client->type = NO_CLIENT;
220 snd_use_lock_init(&client->use_lock);
221 rwlock_init(&client->ports_lock);
222 mutex_init(&client->ports_mutex);
223 INIT_LIST_HEAD(&client->ports_list_head);
225 /* find free slot in the client table */
226 spin_lock_irqsave(&clients_lock, flags);
227 if (client_index < 0) {
228 for (c = SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN;
229 c < SNDRV_SEQ_MAX_CLIENTS;
231 if (clienttab[c] || clienttablock[c])
233 clienttab[client->number = c] = client;
234 spin_unlock_irqrestore(&clients_lock, flags);
238 if (clienttab[client_index] == NULL && !clienttablock[client_index]) {
239 clienttab[client->number = client_index] = client;
240 spin_unlock_irqrestore(&clients_lock, flags);
244 spin_unlock_irqrestore(&clients_lock, flags);
245 snd_seq_pool_delete(&client->pool);
247 return NULL; /* no free slot found or busy, return failure code */
251 static int seq_free_client1(struct snd_seq_client *client)
257 snd_seq_delete_all_ports(client);
258 snd_seq_queue_client_leave(client->number);
259 spin_lock_irqsave(&clients_lock, flags);
260 clienttablock[client->number] = 1;
261 clienttab[client->number] = NULL;
262 spin_unlock_irqrestore(&clients_lock, flags);
263 snd_use_lock_sync(&client->use_lock);
264 snd_seq_queue_client_termination(client->number);
266 snd_seq_pool_delete(&client->pool);
267 spin_lock_irqsave(&clients_lock, flags);
268 clienttablock[client->number] = 0;
269 spin_unlock_irqrestore(&clients_lock, flags);
274 static void seq_free_client(struct snd_seq_client * client)
276 mutex_lock(®ister_mutex);
277 switch (client->type) {
279 pr_warn("ALSA: seq: Trying to free unused client %d\n",
284 seq_free_client1(client);
285 usage_free(&client_usage, 1);
289 pr_err("ALSA: seq: Trying to free client %d with undefined type = %d\n",
290 client->number, client->type);
292 mutex_unlock(®ister_mutex);
294 snd_seq_system_client_ev_client_exit(client->number);
299 /* -------------------------------------------------------- */
301 /* create a user client */
302 static int snd_seq_open(struct inode *inode, struct file *file)
304 int c, mode; /* client id */
305 struct snd_seq_client *client;
306 struct snd_seq_user_client *user;
309 err = nonseekable_open(inode, file);
313 if (mutex_lock_interruptible(®ister_mutex))
315 client = seq_create_client1(-1, SNDRV_SEQ_DEFAULT_EVENTS);
316 if (client == NULL) {
317 mutex_unlock(®ister_mutex);
318 return -ENOMEM; /* failure code */
321 mode = snd_seq_file_flags(file);
322 if (mode & SNDRV_SEQ_LFLG_INPUT)
323 client->accept_input = 1;
324 if (mode & SNDRV_SEQ_LFLG_OUTPUT)
325 client->accept_output = 1;
327 user = &client->data.user;
329 user->fifo_pool_size = 0;
331 if (mode & SNDRV_SEQ_LFLG_INPUT) {
332 user->fifo_pool_size = SNDRV_SEQ_DEFAULT_CLIENT_EVENTS;
333 user->fifo = snd_seq_fifo_new(user->fifo_pool_size);
334 if (user->fifo == NULL) {
335 seq_free_client1(client);
337 mutex_unlock(®ister_mutex);
342 usage_alloc(&client_usage, 1);
343 client->type = USER_CLIENT;
344 mutex_unlock(®ister_mutex);
347 file->private_data = client;
349 /* fill client data */
351 sprintf(client->name, "Client-%d", c);
352 client->data.user.owner = get_pid(task_pid(current));
354 /* make others aware this new client */
355 snd_seq_system_client_ev_client_start(c);
360 /* delete a user client */
361 static int snd_seq_release(struct inode *inode, struct file *file)
363 struct snd_seq_client *client = file->private_data;
366 seq_free_client(client);
367 if (client->data.user.fifo)
368 snd_seq_fifo_delete(&client->data.user.fifo);
369 put_pid(client->data.user.owner);
377 /* handle client read() */
378 /* possible error values:
379 * -ENXIO invalid client or file open mode
380 * -ENOSPC FIFO overflow (the flag is cleared after this error report)
381 * -EINVAL no enough user-space buffer to write the whole event
382 * -EFAULT seg. fault during copy to user space
384 static ssize_t snd_seq_read(struct file *file, char __user *buf, size_t count,
387 struct snd_seq_client *client = file->private_data;
388 struct snd_seq_fifo *fifo;
391 struct snd_seq_event_cell *cell;
393 if (!(snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_INPUT))
396 if (!access_ok(VERIFY_WRITE, buf, count))
399 /* check client structures are in place */
400 if (snd_BUG_ON(!client))
403 if (!client->accept_input || (fifo = client->data.user.fifo) == NULL)
406 if (atomic_read(&fifo->overflow) > 0) {
407 /* buffer overflow is detected */
408 snd_seq_fifo_clear(fifo);
409 /* return error code */
415 snd_seq_fifo_lock(fifo);
417 /* while data available in queue */
418 while (count >= sizeof(struct snd_seq_event)) {
421 nonblock = (file->f_flags & O_NONBLOCK) || result > 0;
422 if ((err = snd_seq_fifo_cell_out(fifo, &cell, nonblock)) < 0) {
425 if (snd_seq_ev_is_variable(&cell->event)) {
426 struct snd_seq_event tmpev;
428 tmpev.data.ext.len &= ~SNDRV_SEQ_EXT_MASK;
429 if (copy_to_user(buf, &tmpev, sizeof(struct snd_seq_event))) {
433 count -= sizeof(struct snd_seq_event);
434 buf += sizeof(struct snd_seq_event);
435 err = snd_seq_expand_var_event(&cell->event, count,
436 (char __force *)buf, 0,
437 sizeof(struct snd_seq_event));
444 if (copy_to_user(buf, &cell->event, sizeof(struct snd_seq_event))) {
448 count -= sizeof(struct snd_seq_event);
449 buf += sizeof(struct snd_seq_event);
451 snd_seq_cell_free(cell);
452 cell = NULL; /* to be sure */
453 result += sizeof(struct snd_seq_event);
458 snd_seq_fifo_cell_putback(fifo, cell);
459 if (err == -EAGAIN && result > 0)
462 snd_seq_fifo_unlock(fifo);
464 return (err < 0) ? err : result;
469 * check access permission to the port
471 static int check_port_perm(struct snd_seq_client_port *port, unsigned int flags)
473 if ((port->capability & flags) != flags)
479 * check if the destination client is available, and return the pointer
480 * if filter is non-zero, client filter bitmap is tested.
482 static struct snd_seq_client *get_event_dest_client(struct snd_seq_event *event,
485 struct snd_seq_client *dest;
487 dest = snd_seq_client_use_ptr(event->dest.client);
490 if (! dest->accept_input)
492 if ((dest->filter & SNDRV_SEQ_FILTER_USE_EVENT) &&
493 ! test_bit(event->type, dest->event_filter))
495 if (filter && !(dest->filter & filter))
498 return dest; /* ok - accessible */
500 snd_seq_client_unlock(dest);
506 * Return the error event.
508 * If the receiver client is a user client, the original event is
509 * encapsulated in SNDRV_SEQ_EVENT_BOUNCE as variable length event. If
510 * the original event is also variable length, the external data is
511 * copied after the event record.
512 * If the receiver client is a kernel client, the original event is
513 * quoted in SNDRV_SEQ_EVENT_KERNEL_ERROR, since this requires no extra
516 static int bounce_error_event(struct snd_seq_client *client,
517 struct snd_seq_event *event,
518 int err, int atomic, int hop)
520 struct snd_seq_event bounce_ev;
523 if (client == NULL ||
524 ! (client->filter & SNDRV_SEQ_FILTER_BOUNCE) ||
525 ! client->accept_input)
526 return 0; /* ignored */
528 /* set up quoted error */
529 memset(&bounce_ev, 0, sizeof(bounce_ev));
530 bounce_ev.type = SNDRV_SEQ_EVENT_KERNEL_ERROR;
531 bounce_ev.flags = SNDRV_SEQ_EVENT_LENGTH_FIXED;
532 bounce_ev.queue = SNDRV_SEQ_QUEUE_DIRECT;
533 bounce_ev.source.client = SNDRV_SEQ_CLIENT_SYSTEM;
534 bounce_ev.source.port = SNDRV_SEQ_PORT_SYSTEM_ANNOUNCE;
535 bounce_ev.dest.client = client->number;
536 bounce_ev.dest.port = event->source.port;
537 bounce_ev.data.quote.origin = event->dest;
538 bounce_ev.data.quote.event = event;
539 bounce_ev.data.quote.value = -err; /* use positive value */
540 result = snd_seq_deliver_single_event(NULL, &bounce_ev, 0, atomic, hop + 1);
542 client->event_lost++;
551 * rewrite the time-stamp of the event record with the curren time
552 * of the given queue.
553 * return non-zero if updated.
555 static int update_timestamp_of_queue(struct snd_seq_event *event,
556 int queue, int real_time)
558 struct snd_seq_queue *q;
563 event->queue = queue;
564 event->flags &= ~SNDRV_SEQ_TIME_STAMP_MASK;
566 event->time.time = snd_seq_timer_get_cur_time(q->timer);
567 event->flags |= SNDRV_SEQ_TIME_STAMP_REAL;
569 event->time.tick = snd_seq_timer_get_cur_tick(q->timer);
570 event->flags |= SNDRV_SEQ_TIME_STAMP_TICK;
578 * deliver an event to the specified destination.
579 * if filter is non-zero, client filter bitmap is tested.
581 * RETURN VALUE: 0 : if succeeded
584 static int snd_seq_deliver_single_event(struct snd_seq_client *client,
585 struct snd_seq_event *event,
586 int filter, int atomic, int hop)
588 struct snd_seq_client *dest = NULL;
589 struct snd_seq_client_port *dest_port = NULL;
590 int result = -ENOENT;
593 direct = snd_seq_ev_is_direct(event);
595 dest = get_event_dest_client(event, filter);
598 dest_port = snd_seq_port_use_ptr(dest, event->dest.port);
599 if (dest_port == NULL)
602 /* check permission */
603 if (! check_port_perm(dest_port, SNDRV_SEQ_PORT_CAP_WRITE)) {
608 if (dest_port->timestamping)
609 update_timestamp_of_queue(event, dest_port->time_queue,
610 dest_port->time_real);
612 switch (dest->type) {
614 if (dest->data.user.fifo)
615 result = snd_seq_fifo_event_in(dest->data.user.fifo, event);
619 if (dest_port->event_input == NULL)
621 result = dest_port->event_input(event, direct,
622 dest_port->private_data,
631 snd_seq_port_unlock(dest_port);
633 snd_seq_client_unlock(dest);
635 if (result < 0 && !direct) {
636 result = bounce_error_event(client, event, result, atomic, hop);
643 * send the event to all subscribers:
645 static int deliver_to_subscribers(struct snd_seq_client *client,
646 struct snd_seq_event *event,
649 struct snd_seq_subscribers *subs;
650 int err, result = 0, num_ev = 0;
651 struct snd_seq_event event_saved;
652 struct snd_seq_client_port *src_port;
653 struct snd_seq_port_subs_info *grp;
655 src_port = snd_seq_port_use_ptr(client, event->source.port);
656 if (src_port == NULL)
657 return -EINVAL; /* invalid source port */
658 /* save original event record */
659 event_saved = *event;
660 grp = &src_port->c_src;
664 read_lock(&grp->list_lock);
666 down_read_nested(&grp->list_mutex, hop);
667 list_for_each_entry(subs, &grp->list_head, src_list) {
668 /* both ports ready? */
669 if (atomic_read(&subs->ref_count) != 2)
671 event->dest = subs->info.dest;
672 if (subs->info.flags & SNDRV_SEQ_PORT_SUBS_TIMESTAMP)
673 /* convert time according to flag with subscription */
674 update_timestamp_of_queue(event, subs->info.queue,
675 subs->info.flags & SNDRV_SEQ_PORT_SUBS_TIME_REAL);
676 err = snd_seq_deliver_single_event(client, event,
679 /* save first error that occurs and continue */
685 /* restore original event record */
686 *event = event_saved;
689 read_unlock(&grp->list_lock);
691 up_read(&grp->list_mutex);
692 *event = event_saved; /* restore */
693 snd_seq_port_unlock(src_port);
694 return (result < 0) ? result : num_ev;
698 #ifdef SUPPORT_BROADCAST
700 * broadcast to all ports:
702 static int port_broadcast_event(struct snd_seq_client *client,
703 struct snd_seq_event *event,
706 int num_ev = 0, err, result = 0;
707 struct snd_seq_client *dest_client;
708 struct snd_seq_client_port *port;
710 dest_client = get_event_dest_client(event, SNDRV_SEQ_FILTER_BROADCAST);
711 if (dest_client == NULL)
712 return 0; /* no matching destination */
714 read_lock(&dest_client->ports_lock);
715 list_for_each_entry(port, &dest_client->ports_list_head, list) {
716 event->dest.port = port->addr.port;
717 /* pass NULL as source client to avoid error bounce */
718 err = snd_seq_deliver_single_event(NULL, event,
719 SNDRV_SEQ_FILTER_BROADCAST,
722 /* save first error that occurs and continue */
729 read_unlock(&dest_client->ports_lock);
730 snd_seq_client_unlock(dest_client);
731 event->dest.port = SNDRV_SEQ_ADDRESS_BROADCAST; /* restore */
732 return (result < 0) ? result : num_ev;
736 * send the event to all clients:
737 * if destination port is also ADDRESS_BROADCAST, deliver to all ports.
739 static int broadcast_event(struct snd_seq_client *client,
740 struct snd_seq_event *event, int atomic, int hop)
742 int err, result = 0, num_ev = 0;
744 struct snd_seq_addr addr;
746 addr = event->dest; /* save */
748 for (dest = 0; dest < SNDRV_SEQ_MAX_CLIENTS; dest++) {
749 /* don't send to itself */
750 if (dest == client->number)
752 event->dest.client = dest;
753 event->dest.port = addr.port;
754 if (addr.port == SNDRV_SEQ_ADDRESS_BROADCAST)
755 err = port_broadcast_event(client, event, atomic, hop);
757 /* pass NULL as source client to avoid error bounce */
758 err = snd_seq_deliver_single_event(NULL, event,
759 SNDRV_SEQ_FILTER_BROADCAST,
762 /* save first error that occurs and continue */
769 event->dest = addr; /* restore */
770 return (result < 0) ? result : num_ev;
774 /* multicast - not supported yet */
775 static int multicast_event(struct snd_seq_client *client, struct snd_seq_event *event,
778 pr_debug("ALSA: seq: multicast not supported yet.\n");
779 return 0; /* ignored */
781 #endif /* SUPPORT_BROADCAST */
784 /* deliver an event to the destination port(s).
785 * if the event is to subscribers or broadcast, the event is dispatched
786 * to multiple targets.
788 * RETURN VALUE: n > 0 : the number of delivered events.
789 * n == 0 : the event was not passed to any client.
790 * n < 0 : error - event was not processed.
792 static int snd_seq_deliver_event(struct snd_seq_client *client, struct snd_seq_event *event,
798 if (hop >= SNDRV_SEQ_MAX_HOPS) {
799 pr_debug("ALSA: seq: too long delivery path (%d:%d->%d:%d)\n",
800 event->source.client, event->source.port,
801 event->dest.client, event->dest.port);
805 if (event->queue == SNDRV_SEQ_ADDRESS_SUBSCRIBERS ||
806 event->dest.client == SNDRV_SEQ_ADDRESS_SUBSCRIBERS)
807 result = deliver_to_subscribers(client, event, atomic, hop);
808 #ifdef SUPPORT_BROADCAST
809 else if (event->queue == SNDRV_SEQ_ADDRESS_BROADCAST ||
810 event->dest.client == SNDRV_SEQ_ADDRESS_BROADCAST)
811 result = broadcast_event(client, event, atomic, hop);
812 else if (event->dest.client >= SNDRV_SEQ_MAX_CLIENTS)
813 result = multicast_event(client, event, atomic, hop);
814 else if (event->dest.port == SNDRV_SEQ_ADDRESS_BROADCAST)
815 result = port_broadcast_event(client, event, atomic, hop);
818 result = snd_seq_deliver_single_event(client, event, 0, atomic, hop);
824 * dispatch an event cell:
825 * This function is called only from queue check routines in timer
826 * interrupts or after enqueued.
827 * The event cell shall be released or re-queued in this function.
829 * RETURN VALUE: n > 0 : the number of delivered events.
830 * n == 0 : the event was not passed to any client.
831 * n < 0 : error - event was not processed.
833 int snd_seq_dispatch_event(struct snd_seq_event_cell *cell, int atomic, int hop)
835 struct snd_seq_client *client;
838 if (snd_BUG_ON(!cell))
841 client = snd_seq_client_use_ptr(cell->event.source.client);
842 if (client == NULL) {
843 snd_seq_cell_free(cell); /* release this cell */
847 if (cell->event.type == SNDRV_SEQ_EVENT_NOTE) {
849 * the event cell is re-used as a NOTE-OFF event and
852 struct snd_seq_event tmpev, *ev;
854 /* reserve this event to enqueue note-off later */
856 tmpev.type = SNDRV_SEQ_EVENT_NOTEON;
857 result = snd_seq_deliver_event(client, &tmpev, atomic, hop);
860 * This was originally a note event. We now re-use the
861 * cell for the note-off event.
865 ev->type = SNDRV_SEQ_EVENT_NOTEOFF;
866 ev->flags |= SNDRV_SEQ_PRIORITY_HIGH;
868 /* add the duration time */
869 switch (ev->flags & SNDRV_SEQ_TIME_STAMP_MASK) {
870 case SNDRV_SEQ_TIME_STAMP_TICK:
871 ev->time.tick += ev->data.note.duration;
873 case SNDRV_SEQ_TIME_STAMP_REAL:
874 /* unit for duration is ms */
875 ev->time.time.tv_nsec += 1000000 * (ev->data.note.duration % 1000);
876 ev->time.time.tv_sec += ev->data.note.duration / 1000 +
877 ev->time.time.tv_nsec / 1000000000;
878 ev->time.time.tv_nsec %= 1000000000;
881 ev->data.note.velocity = ev->data.note.off_velocity;
883 /* Now queue this cell as the note off event */
884 if (snd_seq_enqueue_event(cell, atomic, hop) < 0)
885 snd_seq_cell_free(cell); /* release this cell */
889 * event cell is freed after processing the event
892 result = snd_seq_deliver_event(client, &cell->event, atomic, hop);
893 snd_seq_cell_free(cell);
896 snd_seq_client_unlock(client);
901 /* Allocate a cell from client pool and enqueue it to queue:
902 * if pool is empty and blocking is TRUE, sleep until a new cell is
905 static int snd_seq_client_enqueue_event(struct snd_seq_client *client,
906 struct snd_seq_event *event,
907 struct file *file, int blocking,
910 struct snd_seq_event_cell *cell;
913 /* special queue values - force direct passing */
914 if (event->queue == SNDRV_SEQ_ADDRESS_SUBSCRIBERS) {
915 event->dest.client = SNDRV_SEQ_ADDRESS_SUBSCRIBERS;
916 event->queue = SNDRV_SEQ_QUEUE_DIRECT;
918 #ifdef SUPPORT_BROADCAST
919 if (event->queue == SNDRV_SEQ_ADDRESS_BROADCAST) {
920 event->dest.client = SNDRV_SEQ_ADDRESS_BROADCAST;
921 event->queue = SNDRV_SEQ_QUEUE_DIRECT;
924 if (event->dest.client == SNDRV_SEQ_ADDRESS_SUBSCRIBERS) {
925 /* check presence of source port */
926 struct snd_seq_client_port *src_port = snd_seq_port_use_ptr(client, event->source.port);
927 if (src_port == NULL)
929 snd_seq_port_unlock(src_port);
932 /* direct event processing without enqueued */
933 if (snd_seq_ev_is_direct(event)) {
934 if (event->type == SNDRV_SEQ_EVENT_NOTE)
935 return -EINVAL; /* this event must be enqueued! */
936 return snd_seq_deliver_event(client, event, atomic, hop);
939 /* Not direct, normal queuing */
940 if (snd_seq_queue_is_used(event->queue, client->number) <= 0)
941 return -EINVAL; /* invalid queue */
942 if (! snd_seq_write_pool_allocated(client))
943 return -ENXIO; /* queue is not allocated */
945 /* allocate an event cell */
946 err = snd_seq_event_dup(client->pool, event, &cell, !blocking || atomic, file);
950 /* we got a cell. enqueue it. */
951 if ((err = snd_seq_enqueue_event(cell, atomic, hop)) < 0) {
952 snd_seq_cell_free(cell);
961 * check validity of event type and data length.
962 * return non-zero if invalid.
964 static int check_event_type_and_length(struct snd_seq_event *ev)
966 switch (snd_seq_ev_length_type(ev)) {
967 case SNDRV_SEQ_EVENT_LENGTH_FIXED:
968 if (snd_seq_ev_is_variable_type(ev))
971 case SNDRV_SEQ_EVENT_LENGTH_VARIABLE:
972 if (! snd_seq_ev_is_variable_type(ev) ||
973 (ev->data.ext.len & ~SNDRV_SEQ_EXT_MASK) >= SNDRV_SEQ_MAX_EVENT_LEN)
976 case SNDRV_SEQ_EVENT_LENGTH_VARUSR:
977 if (! snd_seq_ev_is_direct(ev))
986 /* possible error values:
987 * -ENXIO invalid client or file open mode
988 * -ENOMEM malloc failed
989 * -EFAULT seg. fault during copy from user space
990 * -EINVAL invalid event
991 * -EAGAIN no space in output pool
992 * -EINTR interrupts while sleep
993 * -EMLINK too many hops
994 * others depends on return value from driver callback
996 static ssize_t snd_seq_write(struct file *file, const char __user *buf,
997 size_t count, loff_t *offset)
999 struct snd_seq_client *client = file->private_data;
1000 int written = 0, len;
1002 struct snd_seq_event event;
1004 if (!(snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_OUTPUT))
1007 /* check client structures are in place */
1008 if (snd_BUG_ON(!client))
1011 if (!client->accept_output || client->pool == NULL)
1014 /* allocate the pool now if the pool is not allocated yet */
1015 if (client->pool->size > 0 && !snd_seq_write_pool_allocated(client)) {
1016 if (snd_seq_pool_init(client->pool) < 0)
1020 /* only process whole events */
1021 while (count >= sizeof(struct snd_seq_event)) {
1022 /* Read in the event header from the user */
1023 len = sizeof(event);
1024 if (copy_from_user(&event, buf, len)) {
1028 event.source.client = client->number; /* fill in client number */
1029 /* Check for extension data length */
1030 if (check_event_type_and_length(&event)) {
1035 /* check for special events */
1036 if (event.type == SNDRV_SEQ_EVENT_NONE)
1038 else if (snd_seq_ev_is_reserved(&event)) {
1043 if (snd_seq_ev_is_variable(&event)) {
1044 int extlen = event.data.ext.len & ~SNDRV_SEQ_EXT_MASK;
1045 if ((size_t)(extlen + len) > count) {
1046 /* back out, will get an error this time or next */
1050 /* set user space pointer */
1051 event.data.ext.len = extlen | SNDRV_SEQ_EXT_USRPTR;
1052 event.data.ext.ptr = (char __force *)buf
1053 + sizeof(struct snd_seq_event);
1054 len += extlen; /* increment data length */
1056 #ifdef CONFIG_COMPAT
1057 if (client->convert32 && snd_seq_ev_is_varusr(&event)) {
1058 void *ptr = (void __force *)compat_ptr(event.data.raw32.d[1]);
1059 event.data.ext.ptr = ptr;
1064 /* ok, enqueue it */
1065 err = snd_seq_client_enqueue_event(client, &event, file,
1066 !(file->f_flags & O_NONBLOCK),
1072 /* Update pointers and counts */
1078 return written ? written : err;
1085 static unsigned int snd_seq_poll(struct file *file, poll_table * wait)
1087 struct snd_seq_client *client = file->private_data;
1088 unsigned int mask = 0;
1090 /* check client structures are in place */
1091 if (snd_BUG_ON(!client))
1094 if ((snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_INPUT) &&
1095 client->data.user.fifo) {
1097 /* check if data is available in the outqueue */
1098 if (snd_seq_fifo_poll_wait(client->data.user.fifo, file, wait))
1099 mask |= POLLIN | POLLRDNORM;
1102 if (snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_OUTPUT) {
1104 /* check if data is available in the pool */
1105 if (!snd_seq_write_pool_allocated(client) ||
1106 snd_seq_pool_poll_wait(client->pool, file, wait))
1107 mask |= POLLOUT | POLLWRNORM;
1114 /*-----------------------------------------------------*/
1116 static int snd_seq_ioctl_pversion(struct snd_seq_client *client, void *arg)
1118 int *pversion = arg;
1120 *pversion = SNDRV_SEQ_VERSION;
1124 static int snd_seq_ioctl_client_id(struct snd_seq_client *client, void *arg)
1126 int *client_id = arg;
1128 *client_id = client->number;
1132 /* SYSTEM_INFO ioctl() */
1133 static int snd_seq_ioctl_system_info(struct snd_seq_client *client, void *arg)
1135 struct snd_seq_system_info *info = arg;
1137 memset(info, 0, sizeof(*info));
1138 /* fill the info fields */
1139 info->queues = SNDRV_SEQ_MAX_QUEUES;
1140 info->clients = SNDRV_SEQ_MAX_CLIENTS;
1141 info->ports = SNDRV_SEQ_MAX_PORTS;
1142 info->channels = 256; /* fixed limit */
1143 info->cur_clients = client_usage.cur;
1144 info->cur_queues = snd_seq_queue_get_cur_queues();
1150 /* RUNNING_MODE ioctl() */
1151 static int snd_seq_ioctl_running_mode(struct snd_seq_client *client, void *arg)
1153 struct snd_seq_running_info *info = arg;
1154 struct snd_seq_client *cptr;
1157 /* requested client number */
1158 cptr = snd_seq_client_use_ptr(info->client);
1160 return -ENOENT; /* don't change !!! */
1162 #ifdef SNDRV_BIG_ENDIAN
1163 if (!info->big_endian) {
1168 if (info->big_endian) {
1174 if (info->cpu_mode > sizeof(long)) {
1178 cptr->convert32 = (info->cpu_mode < sizeof(long));
1180 snd_seq_client_unlock(cptr);
1184 /* CLIENT_INFO ioctl() */
1185 static void get_client_info(struct snd_seq_client *cptr,
1186 struct snd_seq_client_info *info)
1188 info->client = cptr->number;
1190 /* fill the info fields */
1191 info->type = cptr->type;
1192 strcpy(info->name, cptr->name);
1193 info->filter = cptr->filter;
1194 info->event_lost = cptr->event_lost;
1195 memcpy(info->event_filter, cptr->event_filter, 32);
1196 info->num_ports = cptr->num_ports;
1198 if (cptr->type == USER_CLIENT)
1199 info->pid = pid_vnr(cptr->data.user.owner);
1203 if (cptr->type == KERNEL_CLIENT)
1204 info->card = cptr->data.kernel.card ? cptr->data.kernel.card->number : -1;
1208 memset(info->reserved, 0, sizeof(info->reserved));
1211 static int snd_seq_ioctl_get_client_info(struct snd_seq_client *client,
1214 struct snd_seq_client_info *client_info = arg;
1215 struct snd_seq_client *cptr;
1217 /* requested client number */
1218 cptr = snd_seq_client_use_ptr(client_info->client);
1220 return -ENOENT; /* don't change !!! */
1222 get_client_info(cptr, client_info);
1223 snd_seq_client_unlock(cptr);
1229 /* CLIENT_INFO ioctl() */
1230 static int snd_seq_ioctl_set_client_info(struct snd_seq_client *client,
1233 struct snd_seq_client_info *client_info = arg;
1235 /* it is not allowed to set the info fields for an another client */
1236 if (client->number != client_info->client)
1238 /* also client type must be set now */
1239 if (client->type != client_info->type)
1242 /* fill the info fields */
1243 if (client_info->name[0])
1244 strlcpy(client->name, client_info->name, sizeof(client->name));
1246 client->filter = client_info->filter;
1247 client->event_lost = client_info->event_lost;
1248 memcpy(client->event_filter, client_info->event_filter, 32);
1255 * CREATE PORT ioctl()
1257 static int snd_seq_ioctl_create_port(struct snd_seq_client *client, void *arg)
1259 struct snd_seq_port_info *info = arg;
1260 struct snd_seq_client_port *port;
1261 struct snd_seq_port_callback *callback;
1264 /* it is not allowed to create the port for an another client */
1265 if (info->addr.client != client->number)
1268 port = snd_seq_create_port(client, (info->flags & SNDRV_SEQ_PORT_FLG_GIVEN_PORT) ? info->addr.port : -1);
1272 if (client->type == USER_CLIENT && info->kernel) {
1273 port_idx = port->addr.port;
1274 snd_seq_port_unlock(port);
1275 snd_seq_delete_port(client, port_idx);
1278 if (client->type == KERNEL_CLIENT) {
1279 if ((callback = info->kernel) != NULL) {
1280 if (callback->owner)
1281 port->owner = callback->owner;
1282 port->private_data = callback->private_data;
1283 port->private_free = callback->private_free;
1284 port->event_input = callback->event_input;
1285 port->c_src.open = callback->subscribe;
1286 port->c_src.close = callback->unsubscribe;
1287 port->c_dest.open = callback->use;
1288 port->c_dest.close = callback->unuse;
1292 info->addr = port->addr;
1294 snd_seq_set_port_info(port, info);
1295 snd_seq_system_client_ev_port_start(port->addr.client, port->addr.port);
1296 snd_seq_port_unlock(port);
1302 * DELETE PORT ioctl()
1304 static int snd_seq_ioctl_delete_port(struct snd_seq_client *client, void *arg)
1306 struct snd_seq_port_info *info = arg;
1309 /* it is not allowed to remove the port for an another client */
1310 if (info->addr.client != client->number)
1313 err = snd_seq_delete_port(client, info->addr.port);
1315 snd_seq_system_client_ev_port_exit(client->number, info->addr.port);
1321 * GET_PORT_INFO ioctl() (on any client)
1323 static int snd_seq_ioctl_get_port_info(struct snd_seq_client *client, void *arg)
1325 struct snd_seq_port_info *info = arg;
1326 struct snd_seq_client *cptr;
1327 struct snd_seq_client_port *port;
1329 cptr = snd_seq_client_use_ptr(info->addr.client);
1333 port = snd_seq_port_use_ptr(cptr, info->addr.port);
1335 snd_seq_client_unlock(cptr);
1336 return -ENOENT; /* don't change */
1340 snd_seq_get_port_info(port, info);
1341 snd_seq_port_unlock(port);
1342 snd_seq_client_unlock(cptr);
1349 * SET_PORT_INFO ioctl() (only ports on this/own client)
1351 static int snd_seq_ioctl_set_port_info(struct snd_seq_client *client, void *arg)
1353 struct snd_seq_port_info *info = arg;
1354 struct snd_seq_client_port *port;
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 struct snd_seq_port_subscribe *subs = arg;
1429 int result = -EINVAL;
1430 struct snd_seq_client *receiver = NULL, *sender = NULL;
1431 struct snd_seq_client_port *sport = NULL, *dport = NULL;
1433 if ((receiver = snd_seq_client_use_ptr(subs->dest.client)) == NULL)
1435 if ((sender = snd_seq_client_use_ptr(subs->sender.client)) == NULL)
1437 if ((sport = snd_seq_port_use_ptr(sender, subs->sender.port)) == NULL)
1439 if ((dport = snd_seq_port_use_ptr(receiver, subs->dest.port)) == NULL)
1442 result = check_subscription_permission(client, sport, dport, subs);
1447 result = snd_seq_port_connect(client, sender, sport, receiver, dport, subs);
1448 if (! result) /* broadcast announce */
1449 snd_seq_client_notify_subscription(SNDRV_SEQ_ADDRESS_SUBSCRIBERS, 0,
1450 subs, SNDRV_SEQ_EVENT_PORT_SUBSCRIBED);
1453 snd_seq_port_unlock(sport);
1455 snd_seq_port_unlock(dport);
1457 snd_seq_client_unlock(sender);
1459 snd_seq_client_unlock(receiver);
1465 * remove from port's subscription list
1467 static int snd_seq_ioctl_unsubscribe_port(struct snd_seq_client *client,
1470 struct snd_seq_port_subscribe *subs = arg;
1471 int result = -ENXIO;
1472 struct snd_seq_client *receiver = NULL, *sender = NULL;
1473 struct snd_seq_client_port *sport = NULL, *dport = NULL;
1475 if ((receiver = snd_seq_client_use_ptr(subs->dest.client)) == NULL)
1477 if ((sender = snd_seq_client_use_ptr(subs->sender.client)) == NULL)
1479 if ((sport = snd_seq_port_use_ptr(sender, subs->sender.port)) == NULL)
1481 if ((dport = snd_seq_port_use_ptr(receiver, subs->dest.port)) == NULL)
1484 result = check_subscription_permission(client, sport, dport, subs);
1488 result = snd_seq_port_disconnect(client, sender, sport, receiver, dport, subs);
1489 if (! result) /* broadcast announce */
1490 snd_seq_client_notify_subscription(SNDRV_SEQ_ADDRESS_SUBSCRIBERS, 0,
1491 subs, SNDRV_SEQ_EVENT_PORT_UNSUBSCRIBED);
1494 snd_seq_port_unlock(sport);
1496 snd_seq_port_unlock(dport);
1498 snd_seq_client_unlock(sender);
1500 snd_seq_client_unlock(receiver);
1505 /* CREATE_QUEUE ioctl() */
1506 static int snd_seq_ioctl_create_queue(struct snd_seq_client *client, void *arg)
1508 struct snd_seq_queue_info *info = arg;
1509 struct snd_seq_queue *q;
1511 q = snd_seq_queue_alloc(client->number, info->locked, info->flags);
1515 info->queue = q->queue;
1516 info->locked = q->locked;
1517 info->owner = q->owner;
1519 /* set queue name */
1521 snprintf(info->name, sizeof(info->name), "Queue-%d", q->queue);
1522 strlcpy(q->name, info->name, sizeof(q->name));
1523 snd_use_lock_free(&q->use_lock);
1528 /* DELETE_QUEUE ioctl() */
1529 static int snd_seq_ioctl_delete_queue(struct snd_seq_client *client, void *arg)
1531 struct snd_seq_queue_info *info = arg;
1533 return snd_seq_queue_delete(client->number, info->queue);
1536 /* GET_QUEUE_INFO ioctl() */
1537 static int snd_seq_ioctl_get_queue_info(struct snd_seq_client *client,
1540 struct snd_seq_queue_info *info = arg;
1541 struct snd_seq_queue *q;
1543 q = queueptr(info->queue);
1547 memset(info, 0, sizeof(*info));
1548 info->queue = q->queue;
1549 info->owner = q->owner;
1550 info->locked = q->locked;
1551 strlcpy(info->name, q->name, sizeof(info->name));
1557 /* SET_QUEUE_INFO ioctl() */
1558 static int snd_seq_ioctl_set_queue_info(struct snd_seq_client *client,
1561 struct snd_seq_queue_info *info = arg;
1562 struct snd_seq_queue *q;
1564 if (info->owner != client->number)
1567 /* change owner/locked permission */
1568 if (snd_seq_queue_check_access(info->queue, client->number)) {
1569 if (snd_seq_queue_set_owner(info->queue, client->number, info->locked) < 0)
1572 snd_seq_queue_use(info->queue, client->number, 1);
1577 q = queueptr(info->queue);
1580 if (q->owner != client->number) {
1584 strlcpy(q->name, info->name, sizeof(q->name));
1590 /* GET_NAMED_QUEUE ioctl() */
1591 static int snd_seq_ioctl_get_named_queue(struct snd_seq_client *client,
1594 struct snd_seq_queue_info *info = arg;
1595 struct snd_seq_queue *q;
1597 q = snd_seq_queue_find_name(info->name);
1600 info->queue = q->queue;
1601 info->owner = q->owner;
1602 info->locked = q->locked;
1608 /* GET_QUEUE_STATUS ioctl() */
1609 static int snd_seq_ioctl_get_queue_status(struct snd_seq_client *client,
1612 struct snd_seq_queue_status *status = arg;
1613 struct snd_seq_queue *queue;
1614 struct snd_seq_timer *tmr;
1616 queue = queueptr(status->queue);
1619 memset(status, 0, sizeof(*status));
1620 status->queue = queue->queue;
1623 status->events = queue->tickq->cells + queue->timeq->cells;
1625 status->time = snd_seq_timer_get_cur_time(tmr);
1626 status->tick = snd_seq_timer_get_cur_tick(tmr);
1628 status->running = tmr->running;
1630 status->flags = queue->flags;
1637 /* GET_QUEUE_TEMPO ioctl() */
1638 static int snd_seq_ioctl_get_queue_tempo(struct snd_seq_client *client,
1641 struct snd_seq_queue_tempo *tempo = arg;
1642 struct snd_seq_queue *queue;
1643 struct snd_seq_timer *tmr;
1645 queue = queueptr(tempo->queue);
1648 memset(tempo, 0, sizeof(*tempo));
1649 tempo->queue = queue->queue;
1653 tempo->tempo = tmr->tempo;
1654 tempo->ppq = tmr->ppq;
1655 tempo->skew_value = tmr->skew;
1656 tempo->skew_base = tmr->skew_base;
1663 /* SET_QUEUE_TEMPO ioctl() */
1664 int snd_seq_set_queue_tempo(int client, struct snd_seq_queue_tempo *tempo)
1666 if (!snd_seq_queue_check_access(tempo->queue, client))
1668 return snd_seq_queue_timer_set_tempo(tempo->queue, client, tempo);
1670 EXPORT_SYMBOL(snd_seq_set_queue_tempo);
1672 static int snd_seq_ioctl_set_queue_tempo(struct snd_seq_client *client,
1675 struct snd_seq_queue_tempo *tempo = arg;
1678 result = snd_seq_set_queue_tempo(client->number, tempo);
1679 return result < 0 ? result : 0;
1683 /* GET_QUEUE_TIMER ioctl() */
1684 static int snd_seq_ioctl_get_queue_timer(struct snd_seq_client *client,
1687 struct snd_seq_queue_timer *timer = arg;
1688 struct snd_seq_queue *queue;
1689 struct snd_seq_timer *tmr;
1691 queue = queueptr(timer->queue);
1695 if (mutex_lock_interruptible(&queue->timer_mutex)) {
1697 return -ERESTARTSYS;
1700 memset(timer, 0, sizeof(*timer));
1701 timer->queue = queue->queue;
1703 timer->type = tmr->type;
1704 if (tmr->type == SNDRV_SEQ_TIMER_ALSA) {
1705 timer->u.alsa.id = tmr->alsa_id;
1706 timer->u.alsa.resolution = tmr->preferred_resolution;
1708 mutex_unlock(&queue->timer_mutex);
1715 /* SET_QUEUE_TIMER ioctl() */
1716 static int snd_seq_ioctl_set_queue_timer(struct snd_seq_client *client,
1719 struct snd_seq_queue_timer *timer = arg;
1722 if (timer->type != SNDRV_SEQ_TIMER_ALSA)
1725 if (snd_seq_queue_check_access(timer->queue, client->number)) {
1726 struct snd_seq_queue *q;
1727 struct snd_seq_timer *tmr;
1729 q = queueptr(timer->queue);
1732 if (mutex_lock_interruptible(&q->timer_mutex)) {
1734 return -ERESTARTSYS;
1737 snd_seq_queue_timer_close(timer->queue);
1738 tmr->type = timer->type;
1739 if (tmr->type == SNDRV_SEQ_TIMER_ALSA) {
1740 tmr->alsa_id = timer->u.alsa.id;
1741 tmr->preferred_resolution = timer->u.alsa.resolution;
1743 result = snd_seq_queue_timer_open(timer->queue);
1744 mutex_unlock(&q->timer_mutex);
1754 /* GET_QUEUE_CLIENT ioctl() */
1755 static int snd_seq_ioctl_get_queue_client(struct snd_seq_client *client,
1758 struct snd_seq_queue_client *info = arg;
1761 used = snd_seq_queue_is_used(info->queue, client->number);
1765 info->client = client->number;
1771 /* SET_QUEUE_CLIENT ioctl() */
1772 static int snd_seq_ioctl_set_queue_client(struct snd_seq_client *client,
1775 struct snd_seq_queue_client *info = arg;
1778 if (info->used >= 0) {
1779 err = snd_seq_queue_use(info->queue, client->number, info->used);
1784 return snd_seq_ioctl_get_queue_client(client, arg);
1788 /* GET_CLIENT_POOL ioctl() */
1789 static int snd_seq_ioctl_get_client_pool(struct snd_seq_client *client,
1792 struct snd_seq_client_pool *info = arg;
1793 struct snd_seq_client *cptr;
1795 cptr = snd_seq_client_use_ptr(info->client);
1798 memset(info, 0, sizeof(*info));
1799 info->client = cptr->number;
1800 info->output_pool = cptr->pool->size;
1801 info->output_room = cptr->pool->room;
1802 info->output_free = info->output_pool;
1803 info->output_free = snd_seq_unused_cells(cptr->pool);
1804 if (cptr->type == USER_CLIENT) {
1805 info->input_pool = cptr->data.user.fifo_pool_size;
1806 info->input_free = info->input_pool;
1807 if (cptr->data.user.fifo)
1808 info->input_free = snd_seq_unused_cells(cptr->data.user.fifo->pool);
1810 info->input_pool = 0;
1811 info->input_free = 0;
1813 snd_seq_client_unlock(cptr);
1818 /* SET_CLIENT_POOL ioctl() */
1819 static int snd_seq_ioctl_set_client_pool(struct snd_seq_client *client,
1822 struct snd_seq_client_pool *info = arg;
1825 if (client->number != info->client)
1826 return -EINVAL; /* can't change other clients */
1828 if (info->output_pool >= 1 && info->output_pool <= SNDRV_SEQ_MAX_EVENTS &&
1829 (! snd_seq_write_pool_allocated(client) ||
1830 info->output_pool != client->pool->size)) {
1831 if (snd_seq_write_pool_allocated(client)) {
1832 /* remove all existing cells */
1833 snd_seq_pool_mark_closing(client->pool);
1834 snd_seq_queue_client_leave_cells(client->number);
1835 snd_seq_pool_done(client->pool);
1837 client->pool->size = info->output_pool;
1838 rc = snd_seq_pool_init(client->pool);
1842 if (client->type == USER_CLIENT && client->data.user.fifo != NULL &&
1843 info->input_pool >= 1 &&
1844 info->input_pool <= SNDRV_SEQ_MAX_CLIENT_EVENTS &&
1845 info->input_pool != client->data.user.fifo_pool_size) {
1846 /* change pool size */
1847 rc = snd_seq_fifo_resize(client->data.user.fifo, info->input_pool);
1850 client->data.user.fifo_pool_size = info->input_pool;
1852 if (info->output_room >= 1 &&
1853 info->output_room <= client->pool->size) {
1854 client->pool->room = info->output_room;
1857 return snd_seq_ioctl_get_client_pool(client, arg);
1861 /* REMOVE_EVENTS ioctl() */
1862 static int snd_seq_ioctl_remove_events(struct snd_seq_client *client,
1865 struct snd_seq_remove_events *info = arg;
1868 * Input mostly not implemented XXX.
1870 if (info->remove_mode & SNDRV_SEQ_REMOVE_INPUT) {
1872 * No restrictions so for a user client we can clear
1875 if (client->type == USER_CLIENT && client->data.user.fifo)
1876 snd_seq_fifo_clear(client->data.user.fifo);
1879 if (info->remove_mode & SNDRV_SEQ_REMOVE_OUTPUT)
1880 snd_seq_queue_remove_cells(client->number, info);
1887 * get subscription info
1889 static int snd_seq_ioctl_get_subscription(struct snd_seq_client *client,
1892 struct snd_seq_port_subscribe *subs = arg;
1894 struct snd_seq_client *sender = NULL;
1895 struct snd_seq_client_port *sport = NULL;
1896 struct snd_seq_subscribers *p;
1899 if ((sender = snd_seq_client_use_ptr(subs->sender.client)) == NULL)
1901 if ((sport = snd_seq_port_use_ptr(sender, subs->sender.port)) == NULL)
1903 p = snd_seq_port_get_subscription(&sport->c_src, &subs->dest);
1912 snd_seq_port_unlock(sport);
1914 snd_seq_client_unlock(sender);
1921 * get subscription info - check only its presence
1923 static int snd_seq_ioctl_query_subs(struct snd_seq_client *client, void *arg)
1925 struct snd_seq_query_subs *subs = arg;
1926 int result = -ENXIO;
1927 struct snd_seq_client *cptr = NULL;
1928 struct snd_seq_client_port *port = NULL;
1929 struct snd_seq_port_subs_info *group;
1930 struct list_head *p;
1933 if ((cptr = snd_seq_client_use_ptr(subs->root.client)) == NULL)
1935 if ((port = snd_seq_port_use_ptr(cptr, subs->root.port)) == NULL)
1938 switch (subs->type) {
1939 case SNDRV_SEQ_QUERY_SUBS_READ:
1940 group = &port->c_src;
1942 case SNDRV_SEQ_QUERY_SUBS_WRITE:
1943 group = &port->c_dest;
1949 down_read(&group->list_mutex);
1950 /* search for the subscriber */
1951 subs->num_subs = group->count;
1954 list_for_each(p, &group->list_head) {
1955 if (i++ == subs->index) {
1957 struct snd_seq_subscribers *s;
1958 if (subs->type == SNDRV_SEQ_QUERY_SUBS_READ) {
1959 s = list_entry(p, struct snd_seq_subscribers, src_list);
1960 subs->addr = s->info.dest;
1962 s = list_entry(p, struct snd_seq_subscribers, dest_list);
1963 subs->addr = s->info.sender;
1965 subs->flags = s->info.flags;
1966 subs->queue = s->info.queue;
1971 up_read(&group->list_mutex);
1975 snd_seq_port_unlock(port);
1977 snd_seq_client_unlock(cptr);
1986 static int snd_seq_ioctl_query_next_client(struct snd_seq_client *client,
1989 struct snd_seq_client_info *info = arg;
1990 struct snd_seq_client *cptr = NULL;
1992 /* search for next client */
1994 if (info->client < 0)
1996 for (; info->client < SNDRV_SEQ_MAX_CLIENTS; info->client++) {
1997 cptr = snd_seq_client_use_ptr(info->client);
2004 get_client_info(cptr, info);
2005 snd_seq_client_unlock(cptr);
2013 static int snd_seq_ioctl_query_next_port(struct snd_seq_client *client,
2016 struct snd_seq_port_info *info = arg;
2017 struct snd_seq_client *cptr;
2018 struct snd_seq_client_port *port = NULL;
2020 cptr = snd_seq_client_use_ptr(info->addr.client);
2024 /* search for next port */
2026 port = snd_seq_port_query_nearest(cptr, info);
2028 snd_seq_client_unlock(cptr);
2033 info->addr = port->addr;
2034 snd_seq_get_port_info(port, info);
2035 snd_seq_port_unlock(port);
2036 snd_seq_client_unlock(cptr);
2041 /* -------------------------------------------------------- */
2043 static const struct ioctl_handler {
2045 int (*func)(struct snd_seq_client *client, void *arg);
2046 } ioctl_handlers[] = {
2047 { SNDRV_SEQ_IOCTL_PVERSION, snd_seq_ioctl_pversion },
2048 { SNDRV_SEQ_IOCTL_CLIENT_ID, snd_seq_ioctl_client_id },
2049 { SNDRV_SEQ_IOCTL_SYSTEM_INFO, snd_seq_ioctl_system_info },
2050 { SNDRV_SEQ_IOCTL_RUNNING_MODE, snd_seq_ioctl_running_mode },
2051 { SNDRV_SEQ_IOCTL_GET_CLIENT_INFO, snd_seq_ioctl_get_client_info },
2052 { SNDRV_SEQ_IOCTL_SET_CLIENT_INFO, snd_seq_ioctl_set_client_info },
2053 { SNDRV_SEQ_IOCTL_CREATE_PORT, snd_seq_ioctl_create_port },
2054 { SNDRV_SEQ_IOCTL_DELETE_PORT, snd_seq_ioctl_delete_port },
2055 { SNDRV_SEQ_IOCTL_GET_PORT_INFO, snd_seq_ioctl_get_port_info },
2056 { SNDRV_SEQ_IOCTL_SET_PORT_INFO, snd_seq_ioctl_set_port_info },
2057 { SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT, snd_seq_ioctl_subscribe_port },
2058 { SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT, snd_seq_ioctl_unsubscribe_port },
2059 { SNDRV_SEQ_IOCTL_CREATE_QUEUE, snd_seq_ioctl_create_queue },
2060 { SNDRV_SEQ_IOCTL_DELETE_QUEUE, snd_seq_ioctl_delete_queue },
2061 { SNDRV_SEQ_IOCTL_GET_QUEUE_INFO, snd_seq_ioctl_get_queue_info },
2062 { SNDRV_SEQ_IOCTL_SET_QUEUE_INFO, snd_seq_ioctl_set_queue_info },
2063 { SNDRV_SEQ_IOCTL_GET_NAMED_QUEUE, snd_seq_ioctl_get_named_queue },
2064 { SNDRV_SEQ_IOCTL_GET_QUEUE_STATUS, snd_seq_ioctl_get_queue_status },
2065 { SNDRV_SEQ_IOCTL_GET_QUEUE_TEMPO, snd_seq_ioctl_get_queue_tempo },
2066 { SNDRV_SEQ_IOCTL_SET_QUEUE_TEMPO, snd_seq_ioctl_set_queue_tempo },
2067 { SNDRV_SEQ_IOCTL_GET_QUEUE_TIMER, snd_seq_ioctl_get_queue_timer },
2068 { SNDRV_SEQ_IOCTL_SET_QUEUE_TIMER, snd_seq_ioctl_set_queue_timer },
2069 { SNDRV_SEQ_IOCTL_GET_QUEUE_CLIENT, snd_seq_ioctl_get_queue_client },
2070 { SNDRV_SEQ_IOCTL_SET_QUEUE_CLIENT, snd_seq_ioctl_set_queue_client },
2071 { SNDRV_SEQ_IOCTL_GET_CLIENT_POOL, snd_seq_ioctl_get_client_pool },
2072 { SNDRV_SEQ_IOCTL_SET_CLIENT_POOL, snd_seq_ioctl_set_client_pool },
2073 { SNDRV_SEQ_IOCTL_GET_SUBSCRIPTION, snd_seq_ioctl_get_subscription },
2074 { SNDRV_SEQ_IOCTL_QUERY_NEXT_CLIENT, snd_seq_ioctl_query_next_client },
2075 { SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT, snd_seq_ioctl_query_next_port },
2076 { SNDRV_SEQ_IOCTL_REMOVE_EVENTS, snd_seq_ioctl_remove_events },
2077 { SNDRV_SEQ_IOCTL_QUERY_SUBS, snd_seq_ioctl_query_subs },
2081 static long snd_seq_ioctl(struct file *file, unsigned int cmd,
2084 struct snd_seq_client *client = file->private_data;
2085 /* To use kernel stack for ioctl data. */
2089 struct snd_seq_system_info system_info;
2090 struct snd_seq_running_info running_info;
2091 struct snd_seq_client_info client_info;
2092 struct snd_seq_port_info port_info;
2093 struct snd_seq_port_subscribe port_subscribe;
2094 struct snd_seq_queue_info queue_info;
2095 struct snd_seq_queue_status queue_status;
2096 struct snd_seq_queue_tempo tempo;
2097 struct snd_seq_queue_timer queue_timer;
2098 struct snd_seq_queue_client queue_client;
2099 struct snd_seq_client_pool client_pool;
2100 struct snd_seq_remove_events remove_events;
2101 struct snd_seq_query_subs query_subs;
2103 const struct ioctl_handler *handler;
2107 if (snd_BUG_ON(!client))
2110 for (handler = ioctl_handlers; handler->cmd > 0; ++handler) {
2111 if (handler->cmd == cmd)
2114 if (handler->cmd == 0)
2117 memset(&buf, 0, sizeof(buf));
2120 * All of ioctl commands for ALSA sequencer get an argument of size
2121 * within 13 bits. We can safely pick up the size from the command.
2123 size = _IOC_SIZE(handler->cmd);
2124 if (handler->cmd & IOC_IN) {
2125 if (copy_from_user(&buf, (const void __user *)arg, size))
2129 err = handler->func(client, &buf);
2131 /* Some commands includes a bug in 'dir' field. */
2132 if (handler->cmd == SNDRV_SEQ_IOCTL_SET_QUEUE_CLIENT ||
2133 handler->cmd == SNDRV_SEQ_IOCTL_SET_CLIENT_POOL ||
2134 (handler->cmd & IOC_OUT))
2135 if (copy_to_user((void __user *)arg, &buf, size))
2142 #ifdef CONFIG_COMPAT
2143 #include "seq_compat.c"
2145 #define snd_seq_ioctl_compat NULL
2148 /* -------------------------------------------------------- */
2151 /* exported to kernel modules */
2152 int snd_seq_create_kernel_client(struct snd_card *card, int client_index,
2153 const char *name_fmt, ...)
2155 struct snd_seq_client *client;
2158 if (snd_BUG_ON(in_interrupt()))
2161 if (card && client_index >= SNDRV_SEQ_CLIENTS_PER_CARD)
2163 if (card == NULL && client_index >= SNDRV_SEQ_GLOBAL_CLIENTS)
2166 if (mutex_lock_interruptible(®ister_mutex))
2167 return -ERESTARTSYS;
2170 client_index += SNDRV_SEQ_GLOBAL_CLIENTS
2171 + card->number * SNDRV_SEQ_CLIENTS_PER_CARD;
2172 if (client_index >= SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN)
2176 /* empty write queue as default */
2177 client = seq_create_client1(client_index, 0);
2178 if (client == NULL) {
2179 mutex_unlock(®ister_mutex);
2180 return -EBUSY; /* failure code */
2182 usage_alloc(&client_usage, 1);
2184 client->accept_input = 1;
2185 client->accept_output = 1;
2186 client->data.kernel.card = card;
2188 va_start(args, name_fmt);
2189 vsnprintf(client->name, sizeof(client->name), name_fmt, args);
2192 client->type = KERNEL_CLIENT;
2193 mutex_unlock(®ister_mutex);
2195 /* make others aware this new client */
2196 snd_seq_system_client_ev_client_start(client->number);
2198 /* return client number to caller */
2199 return client->number;
2201 EXPORT_SYMBOL(snd_seq_create_kernel_client);
2203 /* exported to kernel modules */
2204 int snd_seq_delete_kernel_client(int client)
2206 struct snd_seq_client *ptr;
2208 if (snd_BUG_ON(in_interrupt()))
2211 ptr = clientptr(client);
2215 seq_free_client(ptr);
2219 EXPORT_SYMBOL(snd_seq_delete_kernel_client);
2221 /* skeleton to enqueue event, called from snd_seq_kernel_client_enqueue
2222 * and snd_seq_kernel_client_enqueue_blocking
2224 static int kernel_client_enqueue(int client, struct snd_seq_event *ev,
2225 struct file *file, int blocking,
2226 int atomic, int hop)
2228 struct snd_seq_client *cptr;
2231 if (snd_BUG_ON(!ev))
2234 if (ev->type == SNDRV_SEQ_EVENT_NONE)
2235 return 0; /* ignore this */
2236 if (ev->type == SNDRV_SEQ_EVENT_KERNEL_ERROR)
2237 return -EINVAL; /* quoted events can't be enqueued */
2239 /* fill in client number */
2240 ev->source.client = client;
2242 if (check_event_type_and_length(ev))
2245 cptr = snd_seq_client_use_ptr(client);
2249 if (! cptr->accept_output)
2252 result = snd_seq_client_enqueue_event(cptr, ev, file, blocking, atomic, hop);
2254 snd_seq_client_unlock(cptr);
2259 * exported, called by kernel clients to enqueue events (w/o blocking)
2261 * RETURN VALUE: zero if succeed, negative if error
2263 int snd_seq_kernel_client_enqueue(int client, struct snd_seq_event * ev,
2264 int atomic, int hop)
2266 return kernel_client_enqueue(client, ev, NULL, 0, atomic, hop);
2268 EXPORT_SYMBOL(snd_seq_kernel_client_enqueue);
2271 * exported, called by kernel clients to enqueue events (with blocking)
2273 * RETURN VALUE: zero if succeed, negative if error
2275 int snd_seq_kernel_client_enqueue_blocking(int client, struct snd_seq_event * ev,
2277 int atomic, int hop)
2279 return kernel_client_enqueue(client, ev, file, 1, atomic, hop);
2281 EXPORT_SYMBOL(snd_seq_kernel_client_enqueue_blocking);
2284 * exported, called by kernel clients to dispatch events directly to other
2285 * clients, bypassing the queues. Event time-stamp will be updated.
2287 * RETURN VALUE: negative = delivery failed,
2288 * zero, or positive: the number of delivered events
2290 int snd_seq_kernel_client_dispatch(int client, struct snd_seq_event * ev,
2291 int atomic, int hop)
2293 struct snd_seq_client *cptr;
2296 if (snd_BUG_ON(!ev))
2299 /* fill in client number */
2300 ev->queue = SNDRV_SEQ_QUEUE_DIRECT;
2301 ev->source.client = client;
2303 if (check_event_type_and_length(ev))
2306 cptr = snd_seq_client_use_ptr(client);
2310 if (!cptr->accept_output)
2313 result = snd_seq_deliver_event(cptr, ev, atomic, hop);
2315 snd_seq_client_unlock(cptr);
2318 EXPORT_SYMBOL(snd_seq_kernel_client_dispatch);
2321 * snd_seq_kernel_client_ctl - operate a command for a client with data in
2323 * @clientid: A numerical ID for a client.
2324 * @cmd: An ioctl(2) command for ALSA sequencer operation.
2325 * @arg: A pointer to data in kernel space.
2327 * Against its name, both kernel/application client can be handled by this
2328 * kernel API. A pointer of 'arg' argument should be in kernel space.
2330 * Return: 0 at success. Negative error code at failure.
2332 int snd_seq_kernel_client_ctl(int clientid, unsigned int cmd, void *arg)
2334 const struct ioctl_handler *handler;
2335 struct snd_seq_client *client;
2337 client = clientptr(clientid);
2341 for (handler = ioctl_handlers; handler->cmd > 0; ++handler) {
2342 if (handler->cmd == cmd)
2343 return handler->func(client, arg);
2346 pr_debug("ALSA: seq unknown ioctl() 0x%x (type='%c', number=0x%02x)\n",
2347 cmd, _IOC_TYPE(cmd), _IOC_NR(cmd));
2350 EXPORT_SYMBOL(snd_seq_kernel_client_ctl);
2352 /* exported (for OSS emulator) */
2353 int snd_seq_kernel_client_write_poll(int clientid, struct file *file, poll_table *wait)
2355 struct snd_seq_client *client;
2357 client = clientptr(clientid);
2361 if (! snd_seq_write_pool_allocated(client))
2363 if (snd_seq_pool_poll_wait(client->pool, file, wait))
2367 EXPORT_SYMBOL(snd_seq_kernel_client_write_poll);
2369 /*---------------------------------------------------------------------------*/
2371 #ifdef CONFIG_SND_PROC_FS
2375 static void snd_seq_info_dump_subscribers(struct snd_info_buffer *buffer,
2376 struct snd_seq_port_subs_info *group,
2377 int is_src, char *msg)
2379 struct list_head *p;
2380 struct snd_seq_subscribers *s;
2383 down_read(&group->list_mutex);
2384 if (list_empty(&group->list_head)) {
2385 up_read(&group->list_mutex);
2388 snd_iprintf(buffer, msg);
2389 list_for_each(p, &group->list_head) {
2391 s = list_entry(p, struct snd_seq_subscribers, src_list);
2393 s = list_entry(p, struct snd_seq_subscribers, dest_list);
2395 snd_iprintf(buffer, ", ");
2396 snd_iprintf(buffer, "%d:%d",
2397 is_src ? s->info.dest.client : s->info.sender.client,
2398 is_src ? s->info.dest.port : s->info.sender.port);
2399 if (s->info.flags & SNDRV_SEQ_PORT_SUBS_TIMESTAMP)
2400 snd_iprintf(buffer, "[%c:%d]", ((s->info.flags & SNDRV_SEQ_PORT_SUBS_TIME_REAL) ? 'r' : 't'), s->info.queue);
2401 if (group->exclusive)
2402 snd_iprintf(buffer, "[ex]");
2404 up_read(&group->list_mutex);
2405 snd_iprintf(buffer, "\n");
2408 #define FLAG_PERM_RD(perm) ((perm) & SNDRV_SEQ_PORT_CAP_READ ? ((perm) & SNDRV_SEQ_PORT_CAP_SUBS_READ ? 'R' : 'r') : '-')
2409 #define FLAG_PERM_WR(perm) ((perm) & SNDRV_SEQ_PORT_CAP_WRITE ? ((perm) & SNDRV_SEQ_PORT_CAP_SUBS_WRITE ? 'W' : 'w') : '-')
2410 #define FLAG_PERM_EX(perm) ((perm) & SNDRV_SEQ_PORT_CAP_NO_EXPORT ? '-' : 'e')
2412 #define FLAG_PERM_DUPLEX(perm) ((perm) & SNDRV_SEQ_PORT_CAP_DUPLEX ? 'X' : '-')
2414 static void snd_seq_info_dump_ports(struct snd_info_buffer *buffer,
2415 struct snd_seq_client *client)
2417 struct snd_seq_client_port *p;
2419 mutex_lock(&client->ports_mutex);
2420 list_for_each_entry(p, &client->ports_list_head, list) {
2421 snd_iprintf(buffer, " Port %3d : \"%s\" (%c%c%c%c)\n",
2422 p->addr.port, p->name,
2423 FLAG_PERM_RD(p->capability),
2424 FLAG_PERM_WR(p->capability),
2425 FLAG_PERM_EX(p->capability),
2426 FLAG_PERM_DUPLEX(p->capability));
2427 snd_seq_info_dump_subscribers(buffer, &p->c_src, 1, " Connecting To: ");
2428 snd_seq_info_dump_subscribers(buffer, &p->c_dest, 0, " Connected From: ");
2430 mutex_unlock(&client->ports_mutex);
2434 /* exported to seq_info.c */
2435 void snd_seq_info_clients_read(struct snd_info_entry *entry,
2436 struct snd_info_buffer *buffer)
2439 struct snd_seq_client *client;
2441 snd_iprintf(buffer, "Client info\n");
2442 snd_iprintf(buffer, " cur clients : %d\n", client_usage.cur);
2443 snd_iprintf(buffer, " peak clients : %d\n", client_usage.peak);
2444 snd_iprintf(buffer, " max clients : %d\n", SNDRV_SEQ_MAX_CLIENTS);
2445 snd_iprintf(buffer, "\n");
2447 /* list the client table */
2448 for (c = 0; c < SNDRV_SEQ_MAX_CLIENTS; c++) {
2449 client = snd_seq_client_use_ptr(c);
2452 if (client->type == NO_CLIENT) {
2453 snd_seq_client_unlock(client);
2457 snd_iprintf(buffer, "Client %3d : \"%s\" [%s]\n",
2459 client->type == USER_CLIENT ? "User" : "Kernel");
2460 snd_seq_info_dump_ports(buffer, client);
2461 if (snd_seq_write_pool_allocated(client)) {
2462 snd_iprintf(buffer, " Output pool :\n");
2463 snd_seq_info_pool(buffer, client->pool, " ");
2465 if (client->type == USER_CLIENT && client->data.user.fifo &&
2466 client->data.user.fifo->pool) {
2467 snd_iprintf(buffer, " Input pool :\n");
2468 snd_seq_info_pool(buffer, client->data.user.fifo->pool, " ");
2470 snd_seq_client_unlock(client);
2473 #endif /* CONFIG_SND_PROC_FS */
2475 /*---------------------------------------------------------------------------*/
2482 static const struct file_operations snd_seq_f_ops =
2484 .owner = THIS_MODULE,
2485 .read = snd_seq_read,
2486 .write = snd_seq_write,
2487 .open = snd_seq_open,
2488 .release = snd_seq_release,
2489 .llseek = no_llseek,
2490 .poll = snd_seq_poll,
2491 .unlocked_ioctl = snd_seq_ioctl,
2492 .compat_ioctl = snd_seq_ioctl_compat,
2495 static struct device seq_dev;
2498 * register sequencer device
2500 int __init snd_sequencer_device_init(void)
2504 snd_device_initialize(&seq_dev, NULL);
2505 dev_set_name(&seq_dev, "seq");
2507 if (mutex_lock_interruptible(®ister_mutex))
2508 return -ERESTARTSYS;
2510 err = snd_register_device(SNDRV_DEVICE_TYPE_SEQUENCER, NULL, 0,
2511 &snd_seq_f_ops, NULL, &seq_dev);
2513 mutex_unlock(®ister_mutex);
2514 put_device(&seq_dev);
2518 mutex_unlock(®ister_mutex);
2526 * unregister sequencer device
2528 void __exit snd_sequencer_device_done(void)
2530 snd_unregister_device(&seq_dev);
2531 put_device(&seq_dev);