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 <sound/driver.h>
25 #include <linux/init.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);
91 static inline mm_segment_t snd_enter_user(void)
93 mm_segment_t fs = get_fs();
98 static inline void snd_leave_user(mm_segment_t fs)
105 static inline unsigned short snd_seq_file_flags(struct file *file)
107 switch (file->f_mode & (FMODE_READ | FMODE_WRITE)) {
109 return SNDRV_SEQ_LFLG_OUTPUT;
111 return SNDRV_SEQ_LFLG_INPUT;
113 return SNDRV_SEQ_LFLG_OPEN;
117 static inline int snd_seq_write_pool_allocated(struct snd_seq_client *client)
119 return snd_seq_total_cells(client->pool) > 0;
122 /* return pointer to client structure for specified id */
123 static struct snd_seq_client *clientptr(int clientid)
125 if (clientid < 0 || clientid >= SNDRV_SEQ_MAX_CLIENTS) {
126 snd_printd("Seq: oops. Trying to get pointer to client %d\n",
130 return clienttab[clientid];
133 struct snd_seq_client *snd_seq_client_use_ptr(int clientid)
136 struct snd_seq_client *client;
138 if (clientid < 0 || clientid >= SNDRV_SEQ_MAX_CLIENTS) {
139 snd_printd("Seq: oops. Trying to get pointer to client %d\n",
143 spin_lock_irqsave(&clients_lock, flags);
144 client = clientptr(clientid);
147 if (clienttablock[clientid]) {
148 spin_unlock_irqrestore(&clients_lock, flags);
151 spin_unlock_irqrestore(&clients_lock, flags);
153 if (!in_interrupt() && current->fs->root) {
154 static char client_requested[SNDRV_SEQ_GLOBAL_CLIENTS];
155 static char card_requested[SNDRV_CARDS];
156 if (clientid < SNDRV_SEQ_GLOBAL_CLIENTS) {
159 if (! client_requested[clientid] && current->fs->root) {
160 client_requested[clientid] = 1;
161 for (idx = 0; idx < 15; idx++) {
162 if (seq_client_load[idx] < 0)
164 if (seq_client_load[idx] == clientid) {
165 request_module("snd-seq-client-%i",
171 } else if (clientid < SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN) {
172 int card = (clientid - SNDRV_SEQ_GLOBAL_CLIENTS) /
173 SNDRV_SEQ_CLIENTS_PER_CARD;
174 if (card < snd_ecards_limit) {
175 if (! card_requested[card]) {
176 card_requested[card] = 1;
177 snd_request_card(card);
179 snd_seq_device_load_drivers();
182 spin_lock_irqsave(&clients_lock, flags);
183 client = clientptr(clientid);
186 spin_unlock_irqrestore(&clients_lock, flags);
192 snd_use_lock_use(&client->use_lock);
193 spin_unlock_irqrestore(&clients_lock, flags);
197 static void usage_alloc(struct snd_seq_usage *res, int num)
200 if (res->cur > res->peak)
201 res->peak = res->cur;
204 static void usage_free(struct snd_seq_usage *res, int num)
209 /* initialise data structures */
210 int __init client_init_data(void)
212 /* zap out the client table */
213 memset(&clienttablock, 0, sizeof(clienttablock));
214 memset(&clienttab, 0, sizeof(clienttab));
219 static struct snd_seq_client *seq_create_client1(int client_index, int poolsize)
223 struct snd_seq_client *client;
225 /* init client data */
226 client = kzalloc(sizeof(*client), GFP_KERNEL);
229 client->pool = snd_seq_pool_new(poolsize);
230 if (client->pool == NULL) {
234 client->type = NO_CLIENT;
235 snd_use_lock_init(&client->use_lock);
236 rwlock_init(&client->ports_lock);
237 mutex_init(&client->ports_mutex);
238 INIT_LIST_HEAD(&client->ports_list_head);
240 /* find free slot in the client table */
241 spin_lock_irqsave(&clients_lock, flags);
242 if (client_index < 0) {
243 for (c = SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN;
244 c < SNDRV_SEQ_MAX_CLIENTS;
246 if (clienttab[c] || clienttablock[c])
248 clienttab[client->number = c] = client;
249 spin_unlock_irqrestore(&clients_lock, flags);
253 if (clienttab[client_index] == NULL && !clienttablock[client_index]) {
254 clienttab[client->number = client_index] = client;
255 spin_unlock_irqrestore(&clients_lock, flags);
259 spin_unlock_irqrestore(&clients_lock, flags);
260 snd_seq_pool_delete(&client->pool);
262 return NULL; /* no free slot found or busy, return failure code */
266 static int seq_free_client1(struct snd_seq_client *client)
270 snd_assert(client != NULL, return -EINVAL);
271 snd_seq_delete_all_ports(client);
272 snd_seq_queue_client_leave(client->number);
273 spin_lock_irqsave(&clients_lock, flags);
274 clienttablock[client->number] = 1;
275 clienttab[client->number] = NULL;
276 spin_unlock_irqrestore(&clients_lock, flags);
277 snd_use_lock_sync(&client->use_lock);
278 snd_seq_queue_client_termination(client->number);
280 snd_seq_pool_delete(&client->pool);
281 spin_lock_irqsave(&clients_lock, flags);
282 clienttablock[client->number] = 0;
283 spin_unlock_irqrestore(&clients_lock, flags);
288 static void seq_free_client(struct snd_seq_client * client)
290 mutex_lock(®ister_mutex);
291 switch (client->type) {
293 snd_printk(KERN_WARNING "Seq: Trying to free unused client %d\n",
298 seq_free_client1(client);
299 usage_free(&client_usage, 1);
303 snd_printk(KERN_ERR "Seq: Trying to free client %d with undefined type = %d\n",
304 client->number, client->type);
306 mutex_unlock(®ister_mutex);
308 snd_seq_system_client_ev_client_exit(client->number);
313 /* -------------------------------------------------------- */
315 /* create a user client */
316 static int snd_seq_open(struct inode *inode, struct file *file)
318 int c, mode; /* client id */
319 struct snd_seq_client *client;
320 struct snd_seq_user_client *user;
322 if (mutex_lock_interruptible(®ister_mutex))
324 client = seq_create_client1(-1, SNDRV_SEQ_DEFAULT_EVENTS);
325 if (client == NULL) {
326 mutex_unlock(®ister_mutex);
327 return -ENOMEM; /* failure code */
330 mode = snd_seq_file_flags(file);
331 if (mode & SNDRV_SEQ_LFLG_INPUT)
332 client->accept_input = 1;
333 if (mode & SNDRV_SEQ_LFLG_OUTPUT)
334 client->accept_output = 1;
336 user = &client->data.user;
338 user->fifo_pool_size = 0;
340 if (mode & SNDRV_SEQ_LFLG_INPUT) {
341 user->fifo_pool_size = SNDRV_SEQ_DEFAULT_CLIENT_EVENTS;
342 user->fifo = snd_seq_fifo_new(user->fifo_pool_size);
343 if (user->fifo == NULL) {
344 seq_free_client1(client);
346 mutex_unlock(®ister_mutex);
351 usage_alloc(&client_usage, 1);
352 client->type = USER_CLIENT;
353 mutex_unlock(®ister_mutex);
356 file->private_data = client;
358 /* fill client data */
360 sprintf(client->name, "Client-%d", c);
362 /* make others aware this new client */
363 snd_seq_system_client_ev_client_start(c);
368 /* delete a user client */
369 static int snd_seq_release(struct inode *inode, struct file *file)
371 struct snd_seq_client *client = file->private_data;
374 seq_free_client(client);
375 if (client->data.user.fifo)
376 snd_seq_fifo_delete(&client->data.user.fifo);
384 /* handle client read() */
385 /* possible error values:
386 * -ENXIO invalid client or file open mode
387 * -ENOSPC FIFO overflow (the flag is cleared after this error report)
388 * -EINVAL no enough user-space buffer to write the whole event
389 * -EFAULT seg. fault during copy to user space
391 static ssize_t snd_seq_read(struct file *file, char __user *buf, size_t count,
394 struct snd_seq_client *client = file->private_data;
395 struct snd_seq_fifo *fifo;
398 struct snd_seq_event_cell *cell;
400 if (!(snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_INPUT))
403 if (!access_ok(VERIFY_WRITE, buf, count))
406 /* check client structures are in place */
407 snd_assert(client != NULL, return -ENXIO);
409 if (!client->accept_input || (fifo = client->data.user.fifo) == NULL)
412 if (atomic_read(&fifo->overflow) > 0) {
413 /* buffer overflow is detected */
414 snd_seq_fifo_clear(fifo);
415 /* return error code */
421 snd_seq_fifo_lock(fifo);
423 /* while data available in queue */
424 while (count >= sizeof(struct snd_seq_event)) {
427 nonblock = (file->f_flags & O_NONBLOCK) || result > 0;
428 if ((err = snd_seq_fifo_cell_out(fifo, &cell, nonblock)) < 0) {
431 if (snd_seq_ev_is_variable(&cell->event)) {
432 struct snd_seq_event tmpev;
434 tmpev.data.ext.len &= ~SNDRV_SEQ_EXT_MASK;
435 if (copy_to_user(buf, &tmpev, sizeof(struct snd_seq_event))) {
439 count -= sizeof(struct snd_seq_event);
440 buf += sizeof(struct snd_seq_event);
441 err = snd_seq_expand_var_event(&cell->event, count,
442 (char __force *)buf, 0,
443 sizeof(struct snd_seq_event));
450 if (copy_to_user(buf, &cell->event, sizeof(struct snd_seq_event))) {
454 count -= sizeof(struct snd_seq_event);
455 buf += sizeof(struct snd_seq_event);
457 snd_seq_cell_free(cell);
458 cell = NULL; /* to be sure */
459 result += sizeof(struct snd_seq_event);
464 snd_seq_fifo_cell_putback(fifo, cell);
465 if (err == -EAGAIN && result > 0)
468 snd_seq_fifo_unlock(fifo);
470 return (err < 0) ? err : result;
475 * check access permission to the port
477 static int check_port_perm(struct snd_seq_client_port *port, unsigned int flags)
479 if ((port->capability & flags) != flags)
485 * check if the destination client is available, and return the pointer
486 * if filter is non-zero, client filter bitmap is tested.
488 static struct snd_seq_client *get_event_dest_client(struct snd_seq_event *event,
491 struct snd_seq_client *dest;
493 dest = snd_seq_client_use_ptr(event->dest.client);
496 if (! dest->accept_input)
498 if ((dest->filter & SNDRV_SEQ_FILTER_USE_EVENT) &&
499 ! test_bit(event->type, dest->event_filter))
501 if (filter && !(dest->filter & filter))
504 return dest; /* ok - accessible */
506 snd_seq_client_unlock(dest);
512 * Return the error event.
514 * If the receiver client is a user client, the original event is
515 * encapsulated in SNDRV_SEQ_EVENT_BOUNCE as variable length event. If
516 * the original event is also variable length, the external data is
517 * copied after the event record.
518 * If the receiver client is a kernel client, the original event is
519 * quoted in SNDRV_SEQ_EVENT_KERNEL_ERROR, since this requires no extra
522 static int bounce_error_event(struct snd_seq_client *client,
523 struct snd_seq_event *event,
524 int err, int atomic, int hop)
526 struct snd_seq_event bounce_ev;
529 if (client == NULL ||
530 ! (client->filter & SNDRV_SEQ_FILTER_BOUNCE) ||
531 ! client->accept_input)
532 return 0; /* ignored */
534 /* set up quoted error */
535 memset(&bounce_ev, 0, sizeof(bounce_ev));
536 bounce_ev.type = SNDRV_SEQ_EVENT_KERNEL_ERROR;
537 bounce_ev.flags = SNDRV_SEQ_EVENT_LENGTH_FIXED;
538 bounce_ev.queue = SNDRV_SEQ_QUEUE_DIRECT;
539 bounce_ev.source.client = SNDRV_SEQ_CLIENT_SYSTEM;
540 bounce_ev.source.port = SNDRV_SEQ_PORT_SYSTEM_ANNOUNCE;
541 bounce_ev.dest.client = client->number;
542 bounce_ev.dest.port = event->source.port;
543 bounce_ev.data.quote.origin = event->dest;
544 bounce_ev.data.quote.event = event;
545 bounce_ev.data.quote.value = -err; /* use positive value */
546 result = snd_seq_deliver_single_event(NULL, &bounce_ev, 0, atomic, hop + 1);
548 client->event_lost++;
557 * rewrite the time-stamp of the event record with the curren time
558 * of the given queue.
559 * return non-zero if updated.
561 static int update_timestamp_of_queue(struct snd_seq_event *event,
562 int queue, int real_time)
564 struct snd_seq_queue *q;
569 event->queue = queue;
570 event->flags &= ~SNDRV_SEQ_TIME_STAMP_MASK;
572 event->time.time = snd_seq_timer_get_cur_time(q->timer);
573 event->flags |= SNDRV_SEQ_TIME_STAMP_REAL;
575 event->time.tick = snd_seq_timer_get_cur_tick(q->timer);
576 event->flags |= SNDRV_SEQ_TIME_STAMP_TICK;
584 * deliver an event to the specified destination.
585 * if filter is non-zero, client filter bitmap is tested.
587 * RETURN VALUE: 0 : if succeeded
590 static int snd_seq_deliver_single_event(struct snd_seq_client *client,
591 struct snd_seq_event *event,
592 int filter, int atomic, int hop)
594 struct snd_seq_client *dest = NULL;
595 struct snd_seq_client_port *dest_port = NULL;
596 int result = -ENOENT;
599 direct = snd_seq_ev_is_direct(event);
601 dest = get_event_dest_client(event, filter);
604 dest_port = snd_seq_port_use_ptr(dest, event->dest.port);
605 if (dest_port == NULL)
608 /* check permission */
609 if (! check_port_perm(dest_port, SNDRV_SEQ_PORT_CAP_WRITE)) {
614 if (dest_port->timestamping)
615 update_timestamp_of_queue(event, dest_port->time_queue,
616 dest_port->time_real);
618 switch (dest->type) {
620 if (dest->data.user.fifo)
621 result = snd_seq_fifo_event_in(dest->data.user.fifo, event);
625 if (dest_port->event_input == NULL)
627 result = dest_port->event_input(event, direct,
628 dest_port->private_data,
637 snd_seq_port_unlock(dest_port);
639 snd_seq_client_unlock(dest);
641 if (result < 0 && !direct) {
642 result = bounce_error_event(client, event, result, atomic, hop);
649 * send the event to all subscribers:
651 static int deliver_to_subscribers(struct snd_seq_client *client,
652 struct snd_seq_event *event,
655 struct snd_seq_subscribers *subs;
656 int err = 0, num_ev = 0;
657 struct snd_seq_event event_saved;
658 struct snd_seq_client_port *src_port;
659 struct snd_seq_port_subs_info *grp;
661 src_port = snd_seq_port_use_ptr(client, event->source.port);
662 if (src_port == NULL)
663 return -EINVAL; /* invalid source port */
664 /* save original event record */
665 event_saved = *event;
666 grp = &src_port->c_src;
670 read_lock(&grp->list_lock);
672 down_read(&grp->list_mutex);
673 list_for_each_entry(subs, &grp->list_head, src_list) {
674 event->dest = subs->info.dest;
675 if (subs->info.flags & SNDRV_SEQ_PORT_SUBS_TIMESTAMP)
676 /* convert time according to flag with subscription */
677 update_timestamp_of_queue(event, subs->info.queue,
678 subs->info.flags & SNDRV_SEQ_PORT_SUBS_TIME_REAL);
679 err = snd_seq_deliver_single_event(client, event,
684 /* restore original event record */
685 *event = event_saved;
688 read_unlock(&grp->list_lock);
690 up_read(&grp->list_mutex);
691 *event = event_saved; /* restore */
692 snd_seq_port_unlock(src_port);
693 return (err < 0) ? err : num_ev;
697 #ifdef SUPPORT_BROADCAST
699 * broadcast to all ports:
701 static int port_broadcast_event(struct snd_seq_client *client,
702 struct snd_seq_event *event,
705 int num_ev = 0, err = 0;
706 struct snd_seq_client *dest_client;
707 struct snd_seq_client_port *port;
709 dest_client = get_event_dest_client(event, SNDRV_SEQ_FILTER_BROADCAST);
710 if (dest_client == NULL)
711 return 0; /* no matching destination */
713 read_lock(&dest_client->ports_lock);
714 list_for_each_entry(port, &dest_client->ports_list_head, list) {
715 event->dest.port = port->addr.port;
716 /* pass NULL as source client to avoid error bounce */
717 err = snd_seq_deliver_single_event(NULL, event,
718 SNDRV_SEQ_FILTER_BROADCAST,
724 read_unlock(&dest_client->ports_lock);
725 snd_seq_client_unlock(dest_client);
726 event->dest.port = SNDRV_SEQ_ADDRESS_BROADCAST; /* restore */
727 return (err < 0) ? err : num_ev;
731 * send the event to all clients:
732 * if destination port is also ADDRESS_BROADCAST, deliver to all ports.
734 static int broadcast_event(struct snd_seq_client *client,
735 struct snd_seq_event *event, int atomic, int hop)
737 int err = 0, num_ev = 0;
739 struct snd_seq_addr addr;
741 addr = event->dest; /* save */
743 for (dest = 0; dest < SNDRV_SEQ_MAX_CLIENTS; dest++) {
744 /* don't send to itself */
745 if (dest == client->number)
747 event->dest.client = dest;
748 event->dest.port = addr.port;
749 if (addr.port == SNDRV_SEQ_ADDRESS_BROADCAST)
750 err = port_broadcast_event(client, event, atomic, hop);
752 /* pass NULL as source client to avoid error bounce */
753 err = snd_seq_deliver_single_event(NULL, event,
754 SNDRV_SEQ_FILTER_BROADCAST,
760 event->dest = addr; /* restore */
761 return (err < 0) ? err : num_ev;
765 /* multicast - not supported yet */
766 static int multicast_event(struct snd_seq_client *client, struct snd_seq_event *event,
769 snd_printd("seq: multicast not supported yet.\n");
770 return 0; /* ignored */
772 #endif /* SUPPORT_BROADCAST */
775 /* deliver an event to the destination port(s).
776 * if the event is to subscribers or broadcast, the event is dispatched
777 * to multiple targets.
779 * RETURN VALUE: n > 0 : the number of delivered events.
780 * n == 0 : the event was not passed to any client.
781 * n < 0 : error - event was not processed.
783 static int snd_seq_deliver_event(struct snd_seq_client *client, struct snd_seq_event *event,
789 if (hop >= SNDRV_SEQ_MAX_HOPS) {
790 snd_printd("too long delivery path (%d:%d->%d:%d)\n",
791 event->source.client, event->source.port,
792 event->dest.client, event->dest.port);
796 if (event->queue == SNDRV_SEQ_ADDRESS_SUBSCRIBERS ||
797 event->dest.client == SNDRV_SEQ_ADDRESS_SUBSCRIBERS)
798 result = deliver_to_subscribers(client, event, atomic, hop);
799 #ifdef SUPPORT_BROADCAST
800 else if (event->queue == SNDRV_SEQ_ADDRESS_BROADCAST ||
801 event->dest.client == SNDRV_SEQ_ADDRESS_BROADCAST)
802 result = broadcast_event(client, event, atomic, hop);
803 else if (event->dest.client >= SNDRV_SEQ_MAX_CLIENTS)
804 result = multicast_event(client, event, atomic, hop);
805 else if (event->dest.port == SNDRV_SEQ_ADDRESS_BROADCAST)
806 result = port_broadcast_event(client, event, atomic, hop);
809 result = snd_seq_deliver_single_event(client, event, 0, atomic, hop);
815 * dispatch an event cell:
816 * This function is called only from queue check routines in timer
817 * interrupts or after enqueued.
818 * The event cell shall be released or re-queued in this function.
820 * RETURN VALUE: n > 0 : the number of delivered events.
821 * n == 0 : the event was not passed to any client.
822 * n < 0 : error - event was not processed.
824 int snd_seq_dispatch_event(struct snd_seq_event_cell *cell, int atomic, int hop)
826 struct snd_seq_client *client;
829 snd_assert(cell != NULL, return -EINVAL);
831 client = snd_seq_client_use_ptr(cell->event.source.client);
832 if (client == NULL) {
833 snd_seq_cell_free(cell); /* release this cell */
837 if (cell->event.type == SNDRV_SEQ_EVENT_NOTE) {
839 * the event cell is re-used as a NOTE-OFF event and
842 struct snd_seq_event tmpev, *ev;
844 /* reserve this event to enqueue note-off later */
846 tmpev.type = SNDRV_SEQ_EVENT_NOTEON;
847 result = snd_seq_deliver_event(client, &tmpev, atomic, hop);
850 * This was originally a note event. We now re-use the
851 * cell for the note-off event.
855 ev->type = SNDRV_SEQ_EVENT_NOTEOFF;
856 ev->flags |= SNDRV_SEQ_PRIORITY_HIGH;
858 /* add the duration time */
859 switch (ev->flags & SNDRV_SEQ_TIME_STAMP_MASK) {
860 case SNDRV_SEQ_TIME_STAMP_TICK:
861 ev->time.tick += ev->data.note.duration;
863 case SNDRV_SEQ_TIME_STAMP_REAL:
864 /* unit for duration is ms */
865 ev->time.time.tv_nsec += 1000000 * (ev->data.note.duration % 1000);
866 ev->time.time.tv_sec += ev->data.note.duration / 1000 +
867 ev->time.time.tv_nsec / 1000000000;
868 ev->time.time.tv_nsec %= 1000000000;
871 ev->data.note.velocity = ev->data.note.off_velocity;
873 /* Now queue this cell as the note off event */
874 if (snd_seq_enqueue_event(cell, atomic, hop) < 0)
875 snd_seq_cell_free(cell); /* release this cell */
879 * event cell is freed after processing the event
882 result = snd_seq_deliver_event(client, &cell->event, atomic, hop);
883 snd_seq_cell_free(cell);
886 snd_seq_client_unlock(client);
891 /* Allocate a cell from client pool and enqueue it to queue:
892 * if pool is empty and blocking is TRUE, sleep until a new cell is
895 static int snd_seq_client_enqueue_event(struct snd_seq_client *client,
896 struct snd_seq_event *event,
897 struct file *file, int blocking,
900 struct snd_seq_event_cell *cell;
903 /* special queue values - force direct passing */
904 if (event->queue == SNDRV_SEQ_ADDRESS_SUBSCRIBERS) {
905 event->dest.client = SNDRV_SEQ_ADDRESS_SUBSCRIBERS;
906 event->queue = SNDRV_SEQ_QUEUE_DIRECT;
908 #ifdef SUPPORT_BROADCAST
909 if (event->queue == SNDRV_SEQ_ADDRESS_BROADCAST) {
910 event->dest.client = SNDRV_SEQ_ADDRESS_BROADCAST;
911 event->queue = SNDRV_SEQ_QUEUE_DIRECT;
914 if (event->dest.client == SNDRV_SEQ_ADDRESS_SUBSCRIBERS) {
915 /* check presence of source port */
916 struct snd_seq_client_port *src_port = snd_seq_port_use_ptr(client, event->source.port);
917 if (src_port == NULL)
919 snd_seq_port_unlock(src_port);
922 /* direct event processing without enqueued */
923 if (snd_seq_ev_is_direct(event)) {
924 if (event->type == SNDRV_SEQ_EVENT_NOTE)
925 return -EINVAL; /* this event must be enqueued! */
926 return snd_seq_deliver_event(client, event, atomic, hop);
929 /* Not direct, normal queuing */
930 if (snd_seq_queue_is_used(event->queue, client->number) <= 0)
931 return -EINVAL; /* invalid queue */
932 if (! snd_seq_write_pool_allocated(client))
933 return -ENXIO; /* queue is not allocated */
935 /* allocate an event cell */
936 err = snd_seq_event_dup(client->pool, event, &cell, !blocking || atomic, file);
940 /* we got a cell. enqueue it. */
941 if ((err = snd_seq_enqueue_event(cell, atomic, hop)) < 0) {
942 snd_seq_cell_free(cell);
951 * check validity of event type and data length.
952 * return non-zero if invalid.
954 static int check_event_type_and_length(struct snd_seq_event *ev)
956 switch (snd_seq_ev_length_type(ev)) {
957 case SNDRV_SEQ_EVENT_LENGTH_FIXED:
958 if (snd_seq_ev_is_variable_type(ev))
961 case SNDRV_SEQ_EVENT_LENGTH_VARIABLE:
962 if (! snd_seq_ev_is_variable_type(ev) ||
963 (ev->data.ext.len & ~SNDRV_SEQ_EXT_MASK) >= SNDRV_SEQ_MAX_EVENT_LEN)
966 case SNDRV_SEQ_EVENT_LENGTH_VARUSR:
967 if (! snd_seq_ev_is_direct(ev))
976 /* possible error values:
977 * -ENXIO invalid client or file open mode
978 * -ENOMEM malloc failed
979 * -EFAULT seg. fault during copy from user space
980 * -EINVAL invalid event
981 * -EAGAIN no space in output pool
982 * -EINTR interrupts while sleep
983 * -EMLINK too many hops
984 * others depends on return value from driver callback
986 static ssize_t snd_seq_write(struct file *file, const char __user *buf,
987 size_t count, loff_t *offset)
989 struct snd_seq_client *client = file->private_data;
990 int written = 0, len;
992 struct snd_seq_event event;
994 if (!(snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_OUTPUT))
997 /* check client structures are in place */
998 snd_assert(client != NULL, return -ENXIO);
1000 if (!client->accept_output || client->pool == NULL)
1003 /* allocate the pool now if the pool is not allocated yet */
1004 if (client->pool->size > 0 && !snd_seq_write_pool_allocated(client)) {
1005 if (snd_seq_pool_init(client->pool) < 0)
1009 /* only process whole events */
1010 while (count >= sizeof(struct snd_seq_event)) {
1011 /* Read in the event header from the user */
1012 len = sizeof(event);
1013 if (copy_from_user(&event, buf, len)) {
1017 event.source.client = client->number; /* fill in client number */
1018 /* Check for extension data length */
1019 if (check_event_type_and_length(&event)) {
1024 /* check for special events */
1025 if (event.type == SNDRV_SEQ_EVENT_NONE)
1027 else if (snd_seq_ev_is_reserved(&event)) {
1032 if (snd_seq_ev_is_variable(&event)) {
1033 int extlen = event.data.ext.len & ~SNDRV_SEQ_EXT_MASK;
1034 if ((size_t)(extlen + len) > count) {
1035 /* back out, will get an error this time or next */
1039 /* set user space pointer */
1040 event.data.ext.len = extlen | SNDRV_SEQ_EXT_USRPTR;
1041 event.data.ext.ptr = (char __force *)buf
1042 + sizeof(struct snd_seq_event);
1043 len += extlen; /* increment data length */
1045 #ifdef CONFIG_COMPAT
1046 if (client->convert32 && snd_seq_ev_is_varusr(&event)) {
1047 void *ptr = compat_ptr(event.data.raw32.d[1]);
1048 event.data.ext.ptr = ptr;
1053 /* ok, enqueue it */
1054 err = snd_seq_client_enqueue_event(client, &event, file,
1055 !(file->f_flags & O_NONBLOCK),
1061 /* Update pointers and counts */
1067 return written ? written : err;
1074 static unsigned int snd_seq_poll(struct file *file, poll_table * wait)
1076 struct snd_seq_client *client = file->private_data;
1077 unsigned int mask = 0;
1079 /* check client structures are in place */
1080 snd_assert(client != NULL, return -ENXIO);
1082 if ((snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_INPUT) &&
1083 client->data.user.fifo) {
1085 /* check if data is available in the outqueue */
1086 if (snd_seq_fifo_poll_wait(client->data.user.fifo, file, wait))
1087 mask |= POLLIN | POLLRDNORM;
1090 if (snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_OUTPUT) {
1092 /* check if data is available in the pool */
1093 if (!snd_seq_write_pool_allocated(client) ||
1094 snd_seq_pool_poll_wait(client->pool, file, wait))
1095 mask |= POLLOUT | POLLWRNORM;
1102 /*-----------------------------------------------------*/
1105 /* SYSTEM_INFO ioctl() */
1106 static int snd_seq_ioctl_system_info(struct snd_seq_client *client, void __user *arg)
1108 struct snd_seq_system_info info;
1110 memset(&info, 0, sizeof(info));
1111 /* fill the info fields */
1112 info.queues = SNDRV_SEQ_MAX_QUEUES;
1113 info.clients = SNDRV_SEQ_MAX_CLIENTS;
1114 info.ports = 256; /* fixed limit */
1115 info.channels = 256; /* fixed limit */
1116 info.cur_clients = client_usage.cur;
1117 info.cur_queues = snd_seq_queue_get_cur_queues();
1119 if (copy_to_user(arg, &info, sizeof(info)))
1125 /* RUNNING_MODE ioctl() */
1126 static int snd_seq_ioctl_running_mode(struct snd_seq_client *client, void __user *arg)
1128 struct snd_seq_running_info info;
1129 struct snd_seq_client *cptr;
1132 if (copy_from_user(&info, arg, sizeof(info)))
1135 /* requested client number */
1136 cptr = snd_seq_client_use_ptr(info.client);
1138 return -ENOENT; /* don't change !!! */
1140 #ifdef SNDRV_BIG_ENDIAN
1141 if (! info.big_endian) {
1146 if (info.big_endian) {
1152 if (info.cpu_mode > sizeof(long)) {
1156 cptr->convert32 = (info.cpu_mode < sizeof(long));
1158 snd_seq_client_unlock(cptr);
1162 /* CLIENT_INFO ioctl() */
1163 static void get_client_info(struct snd_seq_client *cptr,
1164 struct snd_seq_client_info *info)
1166 info->client = cptr->number;
1168 /* fill the info fields */
1169 info->type = cptr->type;
1170 strcpy(info->name, cptr->name);
1171 info->filter = cptr->filter;
1172 info->event_lost = cptr->event_lost;
1173 memcpy(info->event_filter, cptr->event_filter, 32);
1174 info->num_ports = cptr->num_ports;
1175 memset(info->reserved, 0, sizeof(info->reserved));
1178 static int snd_seq_ioctl_get_client_info(struct snd_seq_client *client,
1181 struct snd_seq_client *cptr;
1182 struct snd_seq_client_info client_info;
1184 if (copy_from_user(&client_info, arg, sizeof(client_info)))
1187 /* requested client number */
1188 cptr = snd_seq_client_use_ptr(client_info.client);
1190 return -ENOENT; /* don't change !!! */
1192 get_client_info(cptr, &client_info);
1193 snd_seq_client_unlock(cptr);
1195 if (copy_to_user(arg, &client_info, sizeof(client_info)))
1201 /* CLIENT_INFO ioctl() */
1202 static int snd_seq_ioctl_set_client_info(struct snd_seq_client *client,
1205 struct snd_seq_client_info client_info;
1207 if (copy_from_user(&client_info, arg, sizeof(client_info)))
1210 /* it is not allowed to set the info fields for an another client */
1211 if (client->number != client_info.client)
1213 /* also client type must be set now */
1214 if (client->type != client_info.type)
1217 /* fill the info fields */
1218 if (client_info.name[0])
1219 strlcpy(client->name, client_info.name, sizeof(client->name));
1221 client->filter = client_info.filter;
1222 client->event_lost = client_info.event_lost;
1223 memcpy(client->event_filter, client_info.event_filter, 32);
1230 * CREATE PORT ioctl()
1232 static int snd_seq_ioctl_create_port(struct snd_seq_client *client,
1235 struct snd_seq_client_port *port;
1236 struct snd_seq_port_info info;
1237 struct snd_seq_port_callback *callback;
1239 if (copy_from_user(&info, arg, sizeof(info)))
1242 /* it is not allowed to create the port for an another client */
1243 if (info.addr.client != client->number)
1246 port = snd_seq_create_port(client, (info.flags & SNDRV_SEQ_PORT_FLG_GIVEN_PORT) ? info.addr.port : -1);
1250 if (client->type == USER_CLIENT && info.kernel) {
1251 snd_seq_delete_port(client, port->addr.port);
1254 if (client->type == KERNEL_CLIENT) {
1255 if ((callback = info.kernel) != NULL) {
1256 if (callback->owner)
1257 port->owner = callback->owner;
1258 port->private_data = callback->private_data;
1259 port->private_free = callback->private_free;
1260 port->callback_all = callback->callback_all;
1261 port->event_input = callback->event_input;
1262 port->c_src.open = callback->subscribe;
1263 port->c_src.close = callback->unsubscribe;
1264 port->c_dest.open = callback->use;
1265 port->c_dest.close = callback->unuse;
1269 info.addr = port->addr;
1271 snd_seq_set_port_info(port, &info);
1272 snd_seq_system_client_ev_port_start(port->addr.client, port->addr.port);
1274 if (copy_to_user(arg, &info, sizeof(info)))
1281 * DELETE PORT ioctl()
1283 static int snd_seq_ioctl_delete_port(struct snd_seq_client *client,
1286 struct snd_seq_port_info info;
1289 /* set passed parameters */
1290 if (copy_from_user(&info, arg, sizeof(info)))
1293 /* it is not allowed to remove the port for an another client */
1294 if (info.addr.client != client->number)
1297 err = snd_seq_delete_port(client, info.addr.port);
1299 snd_seq_system_client_ev_port_exit(client->number, info.addr.port);
1305 * GET_PORT_INFO ioctl() (on any client)
1307 static int snd_seq_ioctl_get_port_info(struct snd_seq_client *client,
1310 struct snd_seq_client *cptr;
1311 struct snd_seq_client_port *port;
1312 struct snd_seq_port_info info;
1314 if (copy_from_user(&info, arg, sizeof(info)))
1316 cptr = snd_seq_client_use_ptr(info.addr.client);
1320 port = snd_seq_port_use_ptr(cptr, info.addr.port);
1322 snd_seq_client_unlock(cptr);
1323 return -ENOENT; /* don't change */
1327 snd_seq_get_port_info(port, &info);
1328 snd_seq_port_unlock(port);
1329 snd_seq_client_unlock(cptr);
1331 if (copy_to_user(arg, &info, sizeof(info)))
1338 * SET_PORT_INFO ioctl() (only ports on this/own client)
1340 static int snd_seq_ioctl_set_port_info(struct snd_seq_client *client,
1343 struct snd_seq_client_port *port;
1344 struct snd_seq_port_info info;
1346 if (copy_from_user(&info, arg, sizeof(info)))
1349 if (info.addr.client != client->number) /* only set our own ports ! */
1351 port = snd_seq_port_use_ptr(client, info.addr.port);
1353 snd_seq_set_port_info(port, &info);
1354 snd_seq_port_unlock(port);
1361 * port subscription (connection)
1363 #define PERM_RD (SNDRV_SEQ_PORT_CAP_READ|SNDRV_SEQ_PORT_CAP_SUBS_READ)
1364 #define PERM_WR (SNDRV_SEQ_PORT_CAP_WRITE|SNDRV_SEQ_PORT_CAP_SUBS_WRITE)
1366 static int check_subscription_permission(struct snd_seq_client *client,
1367 struct snd_seq_client_port *sport,
1368 struct snd_seq_client_port *dport,
1369 struct snd_seq_port_subscribe *subs)
1371 if (client->number != subs->sender.client &&
1372 client->number != subs->dest.client) {
1373 /* connection by third client - check export permission */
1374 if (check_port_perm(sport, SNDRV_SEQ_PORT_CAP_NO_EXPORT))
1376 if (check_port_perm(dport, SNDRV_SEQ_PORT_CAP_NO_EXPORT))
1380 /* check read permission */
1381 /* if sender or receiver is the subscribing client itself,
1382 * no permission check is necessary
1384 if (client->number != subs->sender.client) {
1385 if (! check_port_perm(sport, PERM_RD))
1388 /* check write permission */
1389 if (client->number != subs->dest.client) {
1390 if (! check_port_perm(dport, PERM_WR))
1397 * send an subscription notify event to user client:
1398 * client must be user client.
1400 int snd_seq_client_notify_subscription(int client, int port,
1401 struct snd_seq_port_subscribe *info,
1404 struct snd_seq_event event;
1406 memset(&event, 0, sizeof(event));
1407 event.type = evtype;
1408 event.data.connect.dest = info->dest;
1409 event.data.connect.sender = info->sender;
1411 return snd_seq_system_notify(client, port, &event); /* non-atomic */
1416 * add to port's subscription list IOCTL interface
1418 static int snd_seq_ioctl_subscribe_port(struct snd_seq_client *client,
1421 int result = -EINVAL;
1422 struct snd_seq_client *receiver = NULL, *sender = NULL;
1423 struct snd_seq_client_port *sport = NULL, *dport = NULL;
1424 struct snd_seq_port_subscribe subs;
1426 if (copy_from_user(&subs, arg, sizeof(subs)))
1429 if ((receiver = snd_seq_client_use_ptr(subs.dest.client)) == NULL)
1431 if ((sender = snd_seq_client_use_ptr(subs.sender.client)) == NULL)
1433 if ((sport = snd_seq_port_use_ptr(sender, subs.sender.port)) == NULL)
1435 if ((dport = snd_seq_port_use_ptr(receiver, subs.dest.port)) == NULL)
1438 result = check_subscription_permission(client, sport, dport, &subs);
1443 result = snd_seq_port_connect(client, sender, sport, receiver, dport, &subs);
1444 if (! result) /* broadcast announce */
1445 snd_seq_client_notify_subscription(SNDRV_SEQ_ADDRESS_SUBSCRIBERS, 0,
1446 &subs, SNDRV_SEQ_EVENT_PORT_SUBSCRIBED);
1449 snd_seq_port_unlock(sport);
1451 snd_seq_port_unlock(dport);
1453 snd_seq_client_unlock(sender);
1455 snd_seq_client_unlock(receiver);
1461 * remove from port's subscription list
1463 static int snd_seq_ioctl_unsubscribe_port(struct snd_seq_client *client,
1466 int result = -ENXIO;
1467 struct snd_seq_client *receiver = NULL, *sender = NULL;
1468 struct snd_seq_client_port *sport = NULL, *dport = NULL;
1469 struct snd_seq_port_subscribe subs;
1471 if (copy_from_user(&subs, arg, sizeof(subs)))
1474 if ((receiver = snd_seq_client_use_ptr(subs.dest.client)) == NULL)
1476 if ((sender = snd_seq_client_use_ptr(subs.sender.client)) == NULL)
1478 if ((sport = snd_seq_port_use_ptr(sender, subs.sender.port)) == NULL)
1480 if ((dport = snd_seq_port_use_ptr(receiver, subs.dest.port)) == NULL)
1483 result = check_subscription_permission(client, sport, dport, &subs);
1487 result = snd_seq_port_disconnect(client, sender, sport, receiver, dport, &subs);
1488 if (! result) /* broadcast announce */
1489 snd_seq_client_notify_subscription(SNDRV_SEQ_ADDRESS_SUBSCRIBERS, 0,
1490 &subs, SNDRV_SEQ_EVENT_PORT_UNSUBSCRIBED);
1493 snd_seq_port_unlock(sport);
1495 snd_seq_port_unlock(dport);
1497 snd_seq_client_unlock(sender);
1499 snd_seq_client_unlock(receiver);
1504 /* CREATE_QUEUE ioctl() */
1505 static int snd_seq_ioctl_create_queue(struct snd_seq_client *client,
1508 struct snd_seq_queue_info info;
1510 struct snd_seq_queue *q;
1512 if (copy_from_user(&info, arg, sizeof(info)))
1515 result = snd_seq_queue_alloc(client->number, info.locked, info.flags);
1519 q = queueptr(result);
1523 info.queue = q->queue;
1524 info.locked = q->locked;
1525 info.owner = q->owner;
1527 /* set queue name */
1529 snprintf(info.name, sizeof(info.name), "Queue-%d", q->queue);
1530 strlcpy(q->name, info.name, sizeof(q->name));
1533 if (copy_to_user(arg, &info, sizeof(info)))
1539 /* DELETE_QUEUE ioctl() */
1540 static int snd_seq_ioctl_delete_queue(struct snd_seq_client *client,
1543 struct snd_seq_queue_info info;
1545 if (copy_from_user(&info, arg, sizeof(info)))
1548 return snd_seq_queue_delete(client->number, info.queue);
1551 /* GET_QUEUE_INFO ioctl() */
1552 static int snd_seq_ioctl_get_queue_info(struct snd_seq_client *client,
1555 struct snd_seq_queue_info info;
1556 struct snd_seq_queue *q;
1558 if (copy_from_user(&info, arg, sizeof(info)))
1561 q = queueptr(info.queue);
1565 memset(&info, 0, sizeof(info));
1566 info.queue = q->queue;
1567 info.owner = q->owner;
1568 info.locked = q->locked;
1569 strlcpy(info.name, q->name, sizeof(info.name));
1572 if (copy_to_user(arg, &info, sizeof(info)))
1578 /* SET_QUEUE_INFO ioctl() */
1579 static int snd_seq_ioctl_set_queue_info(struct snd_seq_client *client,
1582 struct snd_seq_queue_info info;
1583 struct snd_seq_queue *q;
1585 if (copy_from_user(&info, arg, sizeof(info)))
1588 if (info.owner != client->number)
1591 /* change owner/locked permission */
1592 if (snd_seq_queue_check_access(info.queue, client->number)) {
1593 if (snd_seq_queue_set_owner(info.queue, client->number, info.locked) < 0)
1596 snd_seq_queue_use(info.queue, client->number, 1);
1601 q = queueptr(info.queue);
1604 if (q->owner != client->number) {
1608 strlcpy(q->name, info.name, sizeof(q->name));
1614 /* GET_NAMED_QUEUE ioctl() */
1615 static int snd_seq_ioctl_get_named_queue(struct snd_seq_client *client, void __user *arg)
1617 struct snd_seq_queue_info info;
1618 struct snd_seq_queue *q;
1620 if (copy_from_user(&info, arg, sizeof(info)))
1623 q = snd_seq_queue_find_name(info.name);
1626 info.queue = q->queue;
1627 info.owner = q->owner;
1628 info.locked = q->locked;
1631 if (copy_to_user(arg, &info, sizeof(info)))
1637 /* GET_QUEUE_STATUS ioctl() */
1638 static int snd_seq_ioctl_get_queue_status(struct snd_seq_client *client,
1641 struct snd_seq_queue_status status;
1642 struct snd_seq_queue *queue;
1643 struct snd_seq_timer *tmr;
1645 if (copy_from_user(&status, arg, sizeof(status)))
1648 queue = queueptr(status.queue);
1651 memset(&status, 0, sizeof(status));
1652 status.queue = queue->queue;
1655 status.events = queue->tickq->cells + queue->timeq->cells;
1657 status.time = snd_seq_timer_get_cur_time(tmr);
1658 status.tick = snd_seq_timer_get_cur_tick(tmr);
1660 status.running = tmr->running;
1662 status.flags = queue->flags;
1665 if (copy_to_user(arg, &status, sizeof(status)))
1671 /* GET_QUEUE_TEMPO ioctl() */
1672 static int snd_seq_ioctl_get_queue_tempo(struct snd_seq_client *client,
1675 struct snd_seq_queue_tempo tempo;
1676 struct snd_seq_queue *queue;
1677 struct snd_seq_timer *tmr;
1679 if (copy_from_user(&tempo, arg, sizeof(tempo)))
1682 queue = queueptr(tempo.queue);
1685 memset(&tempo, 0, sizeof(tempo));
1686 tempo.queue = queue->queue;
1690 tempo.tempo = tmr->tempo;
1691 tempo.ppq = tmr->ppq;
1692 tempo.skew_value = tmr->skew;
1693 tempo.skew_base = tmr->skew_base;
1696 if (copy_to_user(arg, &tempo, sizeof(tempo)))
1702 /* SET_QUEUE_TEMPO ioctl() */
1703 int snd_seq_set_queue_tempo(int client, struct snd_seq_queue_tempo *tempo)
1705 if (!snd_seq_queue_check_access(tempo->queue, client))
1707 return snd_seq_queue_timer_set_tempo(tempo->queue, client, tempo);
1710 EXPORT_SYMBOL(snd_seq_set_queue_tempo);
1712 static int snd_seq_ioctl_set_queue_tempo(struct snd_seq_client *client,
1716 struct snd_seq_queue_tempo tempo;
1718 if (copy_from_user(&tempo, arg, sizeof(tempo)))
1721 result = snd_seq_set_queue_tempo(client->number, &tempo);
1722 return result < 0 ? result : 0;
1726 /* GET_QUEUE_TIMER ioctl() */
1727 static int snd_seq_ioctl_get_queue_timer(struct snd_seq_client *client,
1730 struct snd_seq_queue_timer timer;
1731 struct snd_seq_queue *queue;
1732 struct snd_seq_timer *tmr;
1734 if (copy_from_user(&timer, arg, sizeof(timer)))
1737 queue = queueptr(timer.queue);
1741 if (mutex_lock_interruptible(&queue->timer_mutex)) {
1743 return -ERESTARTSYS;
1746 memset(&timer, 0, sizeof(timer));
1747 timer.queue = queue->queue;
1749 timer.type = tmr->type;
1750 if (tmr->type == SNDRV_SEQ_TIMER_ALSA) {
1751 timer.u.alsa.id = tmr->alsa_id;
1752 timer.u.alsa.resolution = tmr->preferred_resolution;
1754 mutex_unlock(&queue->timer_mutex);
1757 if (copy_to_user(arg, &timer, sizeof(timer)))
1763 /* SET_QUEUE_TIMER ioctl() */
1764 static int snd_seq_ioctl_set_queue_timer(struct snd_seq_client *client,
1768 struct snd_seq_queue_timer timer;
1770 if (copy_from_user(&timer, arg, sizeof(timer)))
1773 if (timer.type != SNDRV_SEQ_TIMER_ALSA)
1776 if (snd_seq_queue_check_access(timer.queue, client->number)) {
1777 struct snd_seq_queue *q;
1778 struct snd_seq_timer *tmr;
1780 q = queueptr(timer.queue);
1783 if (mutex_lock_interruptible(&q->timer_mutex)) {
1785 return -ERESTARTSYS;
1788 snd_seq_queue_timer_close(timer.queue);
1789 tmr->type = timer.type;
1790 if (tmr->type == SNDRV_SEQ_TIMER_ALSA) {
1791 tmr->alsa_id = timer.u.alsa.id;
1792 tmr->preferred_resolution = timer.u.alsa.resolution;
1794 result = snd_seq_queue_timer_open(timer.queue);
1795 mutex_unlock(&q->timer_mutex);
1805 /* GET_QUEUE_CLIENT ioctl() */
1806 static int snd_seq_ioctl_get_queue_client(struct snd_seq_client *client,
1809 struct snd_seq_queue_client info;
1812 if (copy_from_user(&info, arg, sizeof(info)))
1815 used = snd_seq_queue_is_used(info.queue, client->number);
1819 info.client = client->number;
1821 if (copy_to_user(arg, &info, sizeof(info)))
1827 /* SET_QUEUE_CLIENT ioctl() */
1828 static int snd_seq_ioctl_set_queue_client(struct snd_seq_client *client,
1832 struct snd_seq_queue_client info;
1834 if (copy_from_user(&info, arg, sizeof(info)))
1837 if (info.used >= 0) {
1838 err = snd_seq_queue_use(info.queue, client->number, info.used);
1843 return snd_seq_ioctl_get_queue_client(client, arg);
1847 /* GET_CLIENT_POOL ioctl() */
1848 static int snd_seq_ioctl_get_client_pool(struct snd_seq_client *client,
1851 struct snd_seq_client_pool info;
1852 struct snd_seq_client *cptr;
1854 if (copy_from_user(&info, arg, sizeof(info)))
1857 cptr = snd_seq_client_use_ptr(info.client);
1860 memset(&info, 0, sizeof(info));
1861 info.output_pool = cptr->pool->size;
1862 info.output_room = cptr->pool->room;
1863 info.output_free = info.output_pool;
1864 info.output_free = snd_seq_unused_cells(cptr->pool);
1865 if (cptr->type == USER_CLIENT) {
1866 info.input_pool = cptr->data.user.fifo_pool_size;
1867 info.input_free = info.input_pool;
1868 if (cptr->data.user.fifo)
1869 info.input_free = snd_seq_unused_cells(cptr->data.user.fifo->pool);
1871 info.input_pool = 0;
1872 info.input_free = 0;
1874 snd_seq_client_unlock(cptr);
1876 if (copy_to_user(arg, &info, sizeof(info)))
1881 /* SET_CLIENT_POOL ioctl() */
1882 static int snd_seq_ioctl_set_client_pool(struct snd_seq_client *client,
1885 struct snd_seq_client_pool info;
1888 if (copy_from_user(&info, arg, sizeof(info)))
1891 if (client->number != info.client)
1892 return -EINVAL; /* can't change other clients */
1894 if (info.output_pool >= 1 && info.output_pool <= SNDRV_SEQ_MAX_EVENTS &&
1895 (! snd_seq_write_pool_allocated(client) ||
1896 info.output_pool != client->pool->size)) {
1897 if (snd_seq_write_pool_allocated(client)) {
1898 /* remove all existing cells */
1899 snd_seq_queue_client_leave_cells(client->number);
1900 snd_seq_pool_done(client->pool);
1902 client->pool->size = info.output_pool;
1903 rc = snd_seq_pool_init(client->pool);
1907 if (client->type == USER_CLIENT && client->data.user.fifo != NULL &&
1908 info.input_pool >= 1 &&
1909 info.input_pool <= SNDRV_SEQ_MAX_CLIENT_EVENTS &&
1910 info.input_pool != client->data.user.fifo_pool_size) {
1911 /* change pool size */
1912 rc = snd_seq_fifo_resize(client->data.user.fifo, info.input_pool);
1915 client->data.user.fifo_pool_size = info.input_pool;
1917 if (info.output_room >= 1 &&
1918 info.output_room <= client->pool->size) {
1919 client->pool->room = info.output_room;
1922 return snd_seq_ioctl_get_client_pool(client, arg);
1926 /* REMOVE_EVENTS ioctl() */
1927 static int snd_seq_ioctl_remove_events(struct snd_seq_client *client,
1930 struct snd_seq_remove_events info;
1932 if (copy_from_user(&info, arg, sizeof(info)))
1936 * Input mostly not implemented XXX.
1938 if (info.remove_mode & SNDRV_SEQ_REMOVE_INPUT) {
1940 * No restrictions so for a user client we can clear
1943 if (client->type == USER_CLIENT)
1944 snd_seq_fifo_clear(client->data.user.fifo);
1947 if (info.remove_mode & SNDRV_SEQ_REMOVE_OUTPUT)
1948 snd_seq_queue_remove_cells(client->number, &info);
1955 * get subscription info
1957 static int snd_seq_ioctl_get_subscription(struct snd_seq_client *client,
1961 struct snd_seq_client *sender = NULL;
1962 struct snd_seq_client_port *sport = NULL;
1963 struct snd_seq_port_subscribe subs;
1964 struct snd_seq_subscribers *p;
1966 if (copy_from_user(&subs, arg, sizeof(subs)))
1970 if ((sender = snd_seq_client_use_ptr(subs.sender.client)) == NULL)
1972 if ((sport = snd_seq_port_use_ptr(sender, subs.sender.port)) == NULL)
1974 p = snd_seq_port_get_subscription(&sport->c_src, &subs.dest);
1983 snd_seq_port_unlock(sport);
1985 snd_seq_client_unlock(sender);
1987 if (copy_to_user(arg, &subs, sizeof(subs)))
1995 * get subscription info - check only its presence
1997 static int snd_seq_ioctl_query_subs(struct snd_seq_client *client,
2000 int result = -ENXIO;
2001 struct snd_seq_client *cptr = NULL;
2002 struct snd_seq_client_port *port = NULL;
2003 struct snd_seq_query_subs subs;
2004 struct snd_seq_port_subs_info *group;
2005 struct list_head *p;
2008 if (copy_from_user(&subs, arg, sizeof(subs)))
2011 if ((cptr = snd_seq_client_use_ptr(subs.root.client)) == NULL)
2013 if ((port = snd_seq_port_use_ptr(cptr, subs.root.port)) == NULL)
2016 switch (subs.type) {
2017 case SNDRV_SEQ_QUERY_SUBS_READ:
2018 group = &port->c_src;
2020 case SNDRV_SEQ_QUERY_SUBS_WRITE:
2021 group = &port->c_dest;
2027 down_read(&group->list_mutex);
2028 /* search for the subscriber */
2029 subs.num_subs = group->count;
2032 list_for_each(p, &group->list_head) {
2033 if (i++ == subs.index) {
2035 struct snd_seq_subscribers *s;
2036 if (subs.type == SNDRV_SEQ_QUERY_SUBS_READ) {
2037 s = list_entry(p, struct snd_seq_subscribers, src_list);
2038 subs.addr = s->info.dest;
2040 s = list_entry(p, struct snd_seq_subscribers, dest_list);
2041 subs.addr = s->info.sender;
2043 subs.flags = s->info.flags;
2044 subs.queue = s->info.queue;
2049 up_read(&group->list_mutex);
2053 snd_seq_port_unlock(port);
2055 snd_seq_client_unlock(cptr);
2057 if (copy_to_user(arg, &subs, sizeof(subs)))
2067 static int snd_seq_ioctl_query_next_client(struct snd_seq_client *client,
2070 struct snd_seq_client *cptr = NULL;
2071 struct snd_seq_client_info info;
2073 if (copy_from_user(&info, arg, sizeof(info)))
2076 /* search for next client */
2078 if (info.client < 0)
2080 for (; info.client < SNDRV_SEQ_MAX_CLIENTS; info.client++) {
2081 cptr = snd_seq_client_use_ptr(info.client);
2088 get_client_info(cptr, &info);
2089 snd_seq_client_unlock(cptr);
2091 if (copy_to_user(arg, &info, sizeof(info)))
2099 static int snd_seq_ioctl_query_next_port(struct snd_seq_client *client,
2102 struct snd_seq_client *cptr;
2103 struct snd_seq_client_port *port = NULL;
2104 struct snd_seq_port_info info;
2106 if (copy_from_user(&info, arg, sizeof(info)))
2108 cptr = snd_seq_client_use_ptr(info.addr.client);
2112 /* search for next port */
2114 port = snd_seq_port_query_nearest(cptr, &info);
2116 snd_seq_client_unlock(cptr);
2121 info.addr = port->addr;
2122 snd_seq_get_port_info(port, &info);
2123 snd_seq_port_unlock(port);
2124 snd_seq_client_unlock(cptr);
2126 if (copy_to_user(arg, &info, sizeof(info)))
2131 /* -------------------------------------------------------- */
2133 static struct seq_ioctl_table {
2135 int (*func)(struct snd_seq_client *client, void __user * arg);
2136 } ioctl_tables[] = {
2137 { SNDRV_SEQ_IOCTL_SYSTEM_INFO, snd_seq_ioctl_system_info },
2138 { SNDRV_SEQ_IOCTL_RUNNING_MODE, snd_seq_ioctl_running_mode },
2139 { SNDRV_SEQ_IOCTL_GET_CLIENT_INFO, snd_seq_ioctl_get_client_info },
2140 { SNDRV_SEQ_IOCTL_SET_CLIENT_INFO, snd_seq_ioctl_set_client_info },
2141 { SNDRV_SEQ_IOCTL_CREATE_PORT, snd_seq_ioctl_create_port },
2142 { SNDRV_SEQ_IOCTL_DELETE_PORT, snd_seq_ioctl_delete_port },
2143 { SNDRV_SEQ_IOCTL_GET_PORT_INFO, snd_seq_ioctl_get_port_info },
2144 { SNDRV_SEQ_IOCTL_SET_PORT_INFO, snd_seq_ioctl_set_port_info },
2145 { SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT, snd_seq_ioctl_subscribe_port },
2146 { SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT, snd_seq_ioctl_unsubscribe_port },
2147 { SNDRV_SEQ_IOCTL_CREATE_QUEUE, snd_seq_ioctl_create_queue },
2148 { SNDRV_SEQ_IOCTL_DELETE_QUEUE, snd_seq_ioctl_delete_queue },
2149 { SNDRV_SEQ_IOCTL_GET_QUEUE_INFO, snd_seq_ioctl_get_queue_info },
2150 { SNDRV_SEQ_IOCTL_SET_QUEUE_INFO, snd_seq_ioctl_set_queue_info },
2151 { SNDRV_SEQ_IOCTL_GET_NAMED_QUEUE, snd_seq_ioctl_get_named_queue },
2152 { SNDRV_SEQ_IOCTL_GET_QUEUE_STATUS, snd_seq_ioctl_get_queue_status },
2153 { SNDRV_SEQ_IOCTL_GET_QUEUE_TEMPO, snd_seq_ioctl_get_queue_tempo },
2154 { SNDRV_SEQ_IOCTL_SET_QUEUE_TEMPO, snd_seq_ioctl_set_queue_tempo },
2155 { SNDRV_SEQ_IOCTL_GET_QUEUE_TIMER, snd_seq_ioctl_get_queue_timer },
2156 { SNDRV_SEQ_IOCTL_SET_QUEUE_TIMER, snd_seq_ioctl_set_queue_timer },
2157 { SNDRV_SEQ_IOCTL_GET_QUEUE_CLIENT, snd_seq_ioctl_get_queue_client },
2158 { SNDRV_SEQ_IOCTL_SET_QUEUE_CLIENT, snd_seq_ioctl_set_queue_client },
2159 { SNDRV_SEQ_IOCTL_GET_CLIENT_POOL, snd_seq_ioctl_get_client_pool },
2160 { SNDRV_SEQ_IOCTL_SET_CLIENT_POOL, snd_seq_ioctl_set_client_pool },
2161 { SNDRV_SEQ_IOCTL_GET_SUBSCRIPTION, snd_seq_ioctl_get_subscription },
2162 { SNDRV_SEQ_IOCTL_QUERY_NEXT_CLIENT, snd_seq_ioctl_query_next_client },
2163 { SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT, snd_seq_ioctl_query_next_port },
2164 { SNDRV_SEQ_IOCTL_REMOVE_EVENTS, snd_seq_ioctl_remove_events },
2165 { SNDRV_SEQ_IOCTL_QUERY_SUBS, snd_seq_ioctl_query_subs },
2169 static int snd_seq_do_ioctl(struct snd_seq_client *client, unsigned int cmd,
2172 struct seq_ioctl_table *p;
2175 case SNDRV_SEQ_IOCTL_PVERSION:
2176 /* return sequencer version number */
2177 return put_user(SNDRV_SEQ_VERSION, (int __user *)arg) ? -EFAULT : 0;
2178 case SNDRV_SEQ_IOCTL_CLIENT_ID:
2179 /* return the id of this client */
2180 return put_user(client->number, (int __user *)arg) ? -EFAULT : 0;
2185 for (p = ioctl_tables; p->cmd; p++) {
2187 return p->func(client, arg);
2189 snd_printd("seq unknown ioctl() 0x%x (type='%c', number=0x%2x)\n",
2190 cmd, _IOC_TYPE(cmd), _IOC_NR(cmd));
2195 static long snd_seq_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2197 struct snd_seq_client *client = file->private_data;
2199 snd_assert(client != NULL, return -ENXIO);
2201 return snd_seq_do_ioctl(client, cmd, (void __user *) arg);
2204 #ifdef CONFIG_COMPAT
2205 #include "seq_compat.c"
2207 #define snd_seq_ioctl_compat NULL
2210 /* -------------------------------------------------------- */
2213 /* exported to kernel modules */
2214 int snd_seq_create_kernel_client(struct snd_card *card, int client_index,
2215 const char *name_fmt, ...)
2217 struct snd_seq_client *client;
2220 snd_assert(! in_interrupt(), return -EBUSY);
2222 if (card && client_index >= SNDRV_SEQ_CLIENTS_PER_CARD)
2224 if (card == NULL && client_index >= SNDRV_SEQ_GLOBAL_CLIENTS)
2227 if (mutex_lock_interruptible(®ister_mutex))
2228 return -ERESTARTSYS;
2231 client_index += SNDRV_SEQ_GLOBAL_CLIENTS
2232 + card->number * SNDRV_SEQ_CLIENTS_PER_CARD;
2233 if (client_index >= SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN)
2237 /* empty write queue as default */
2238 client = seq_create_client1(client_index, 0);
2239 if (client == NULL) {
2240 mutex_unlock(®ister_mutex);
2241 return -EBUSY; /* failure code */
2243 usage_alloc(&client_usage, 1);
2245 client->accept_input = 1;
2246 client->accept_output = 1;
2248 va_start(args, name_fmt);
2249 vsnprintf(client->name, sizeof(client->name), name_fmt, args);
2252 client->type = KERNEL_CLIENT;
2253 mutex_unlock(®ister_mutex);
2255 /* make others aware this new client */
2256 snd_seq_system_client_ev_client_start(client->number);
2258 /* return client number to caller */
2259 return client->number;
2262 EXPORT_SYMBOL(snd_seq_create_kernel_client);
2264 /* exported to kernel modules */
2265 int snd_seq_delete_kernel_client(int client)
2267 struct snd_seq_client *ptr;
2269 snd_assert(! in_interrupt(), return -EBUSY);
2271 ptr = clientptr(client);
2275 seq_free_client(ptr);
2280 EXPORT_SYMBOL(snd_seq_delete_kernel_client);
2282 /* skeleton to enqueue event, called from snd_seq_kernel_client_enqueue
2283 * and snd_seq_kernel_client_enqueue_blocking
2285 static int kernel_client_enqueue(int client, struct snd_seq_event *ev,
2286 struct file *file, int blocking,
2287 int atomic, int hop)
2289 struct snd_seq_client *cptr;
2292 snd_assert(ev != NULL, return -EINVAL);
2294 if (ev->type == SNDRV_SEQ_EVENT_NONE)
2295 return 0; /* ignore this */
2296 if (ev->type == SNDRV_SEQ_EVENT_KERNEL_ERROR)
2297 return -EINVAL; /* quoted events can't be enqueued */
2299 /* fill in client number */
2300 ev->source.client = client;
2302 if (check_event_type_and_length(ev))
2305 cptr = snd_seq_client_use_ptr(client);
2309 if (! cptr->accept_output)
2312 result = snd_seq_client_enqueue_event(cptr, ev, file, blocking, atomic, hop);
2314 snd_seq_client_unlock(cptr);
2319 * exported, called by kernel clients to enqueue events (w/o blocking)
2321 * RETURN VALUE: zero if succeed, negative if error
2323 int snd_seq_kernel_client_enqueue(int client, struct snd_seq_event * ev,
2324 int atomic, int hop)
2326 return kernel_client_enqueue(client, ev, NULL, 0, atomic, hop);
2329 EXPORT_SYMBOL(snd_seq_kernel_client_enqueue);
2332 * exported, called by kernel clients to enqueue events (with blocking)
2334 * RETURN VALUE: zero if succeed, negative if error
2336 int snd_seq_kernel_client_enqueue_blocking(int client, struct snd_seq_event * ev,
2338 int atomic, int hop)
2340 return kernel_client_enqueue(client, ev, file, 1, atomic, hop);
2343 EXPORT_SYMBOL(snd_seq_kernel_client_enqueue_blocking);
2346 * exported, called by kernel clients to dispatch events directly to other
2347 * clients, bypassing the queues. Event time-stamp will be updated.
2349 * RETURN VALUE: negative = delivery failed,
2350 * zero, or positive: the number of delivered events
2352 int snd_seq_kernel_client_dispatch(int client, struct snd_seq_event * ev,
2353 int atomic, int hop)
2355 struct snd_seq_client *cptr;
2358 snd_assert(ev != NULL, return -EINVAL);
2360 /* fill in client number */
2361 ev->queue = SNDRV_SEQ_QUEUE_DIRECT;
2362 ev->source.client = client;
2364 if (check_event_type_and_length(ev))
2367 cptr = snd_seq_client_use_ptr(client);
2371 if (!cptr->accept_output)
2374 result = snd_seq_deliver_event(cptr, ev, atomic, hop);
2376 snd_seq_client_unlock(cptr);
2380 EXPORT_SYMBOL(snd_seq_kernel_client_dispatch);
2383 * exported, called by kernel clients to perform same functions as with
2386 int snd_seq_kernel_client_ctl(int clientid, unsigned int cmd, void *arg)
2388 struct snd_seq_client *client;
2392 client = clientptr(clientid);
2395 fs = snd_enter_user();
2396 result = snd_seq_do_ioctl(client, cmd, (void __user *)arg);
2401 EXPORT_SYMBOL(snd_seq_kernel_client_ctl);
2403 /* exported (for OSS emulator) */
2404 int snd_seq_kernel_client_write_poll(int clientid, struct file *file, poll_table *wait)
2406 struct snd_seq_client *client;
2408 client = clientptr(clientid);
2412 if (! snd_seq_write_pool_allocated(client))
2414 if (snd_seq_pool_poll_wait(client->pool, file, wait))
2419 EXPORT_SYMBOL(snd_seq_kernel_client_write_poll);
2421 /*---------------------------------------------------------------------------*/
2423 #ifdef CONFIG_PROC_FS
2427 static void snd_seq_info_dump_subscribers(struct snd_info_buffer *buffer,
2428 struct snd_seq_port_subs_info *group,
2429 int is_src, char *msg)
2431 struct list_head *p;
2432 struct snd_seq_subscribers *s;
2435 down_read(&group->list_mutex);
2436 if (list_empty(&group->list_head)) {
2437 up_read(&group->list_mutex);
2440 snd_iprintf(buffer, msg);
2441 list_for_each(p, &group->list_head) {
2443 s = list_entry(p, struct snd_seq_subscribers, src_list);
2445 s = list_entry(p, struct snd_seq_subscribers, dest_list);
2447 snd_iprintf(buffer, ", ");
2448 snd_iprintf(buffer, "%d:%d",
2449 is_src ? s->info.dest.client : s->info.sender.client,
2450 is_src ? s->info.dest.port : s->info.sender.port);
2451 if (s->info.flags & SNDRV_SEQ_PORT_SUBS_TIMESTAMP)
2452 snd_iprintf(buffer, "[%c:%d]", ((s->info.flags & SNDRV_SEQ_PORT_SUBS_TIME_REAL) ? 'r' : 't'), s->info.queue);
2453 if (group->exclusive)
2454 snd_iprintf(buffer, "[ex]");
2456 up_read(&group->list_mutex);
2457 snd_iprintf(buffer, "\n");
2460 #define FLAG_PERM_RD(perm) ((perm) & SNDRV_SEQ_PORT_CAP_READ ? ((perm) & SNDRV_SEQ_PORT_CAP_SUBS_READ ? 'R' : 'r') : '-')
2461 #define FLAG_PERM_WR(perm) ((perm) & SNDRV_SEQ_PORT_CAP_WRITE ? ((perm) & SNDRV_SEQ_PORT_CAP_SUBS_WRITE ? 'W' : 'w') : '-')
2462 #define FLAG_PERM_EX(perm) ((perm) & SNDRV_SEQ_PORT_CAP_NO_EXPORT ? '-' : 'e')
2464 #define FLAG_PERM_DUPLEX(perm) ((perm) & SNDRV_SEQ_PORT_CAP_DUPLEX ? 'X' : '-')
2466 static void snd_seq_info_dump_ports(struct snd_info_buffer *buffer,
2467 struct snd_seq_client *client)
2469 struct snd_seq_client_port *p;
2471 mutex_lock(&client->ports_mutex);
2472 list_for_each_entry(p, &client->ports_list_head, list) {
2473 snd_iprintf(buffer, " Port %3d : \"%s\" (%c%c%c%c)\n",
2474 p->addr.port, p->name,
2475 FLAG_PERM_RD(p->capability),
2476 FLAG_PERM_WR(p->capability),
2477 FLAG_PERM_EX(p->capability),
2478 FLAG_PERM_DUPLEX(p->capability));
2479 snd_seq_info_dump_subscribers(buffer, &p->c_src, 1, " Connecting To: ");
2480 snd_seq_info_dump_subscribers(buffer, &p->c_dest, 0, " Connected From: ");
2482 mutex_unlock(&client->ports_mutex);
2486 void snd_seq_info_pool(struct snd_info_buffer *buffer,
2487 struct snd_seq_pool *pool, char *space);
2489 /* exported to seq_info.c */
2490 void snd_seq_info_clients_read(struct snd_info_entry *entry,
2491 struct snd_info_buffer *buffer)
2494 struct snd_seq_client *client;
2496 snd_iprintf(buffer, "Client info\n");
2497 snd_iprintf(buffer, " cur clients : %d\n", client_usage.cur);
2498 snd_iprintf(buffer, " peak clients : %d\n", client_usage.peak);
2499 snd_iprintf(buffer, " max clients : %d\n", SNDRV_SEQ_MAX_CLIENTS);
2500 snd_iprintf(buffer, "\n");
2502 /* list the client table */
2503 for (c = 0; c < SNDRV_SEQ_MAX_CLIENTS; c++) {
2504 client = snd_seq_client_use_ptr(c);
2507 if (client->type == NO_CLIENT) {
2508 snd_seq_client_unlock(client);
2512 snd_iprintf(buffer, "Client %3d : \"%s\" [%s]\n",
2514 client->type == USER_CLIENT ? "User" : "Kernel");
2515 snd_seq_info_dump_ports(buffer, client);
2516 if (snd_seq_write_pool_allocated(client)) {
2517 snd_iprintf(buffer, " Output pool :\n");
2518 snd_seq_info_pool(buffer, client->pool, " ");
2520 if (client->type == USER_CLIENT && client->data.user.fifo &&
2521 client->data.user.fifo->pool) {
2522 snd_iprintf(buffer, " Input pool :\n");
2523 snd_seq_info_pool(buffer, client->data.user.fifo->pool, " ");
2525 snd_seq_client_unlock(client);
2528 #endif /* CONFIG_PROC_FS */
2530 /*---------------------------------------------------------------------------*/
2537 static const struct file_operations snd_seq_f_ops =
2539 .owner = THIS_MODULE,
2540 .read = snd_seq_read,
2541 .write = snd_seq_write,
2542 .open = snd_seq_open,
2543 .release = snd_seq_release,
2544 .poll = snd_seq_poll,
2545 .unlocked_ioctl = snd_seq_ioctl,
2546 .compat_ioctl = snd_seq_ioctl_compat,
2550 * register sequencer device
2552 int __init snd_sequencer_device_init(void)
2556 if (mutex_lock_interruptible(®ister_mutex))
2557 return -ERESTARTSYS;
2559 if ((err = snd_register_device(SNDRV_DEVICE_TYPE_SEQUENCER, NULL, 0,
2560 &snd_seq_f_ops, NULL, "seq")) < 0) {
2561 mutex_unlock(®ister_mutex);
2565 mutex_unlock(®ister_mutex);
2573 * unregister sequencer device
2575 void __exit snd_sequencer_device_done(void)
2577 snd_unregister_device(SNDRV_DEVICE_TYPE_SEQUENCER, NULL, 0);