2 * ALSA sequencer Client Manager
3 * Copyright (c) 1998-2001 by Frank van de Pol <fvdpol@coil.demon.nl>
4 * Jaroslav Kysela <perex@suse.cz>
5 * Takashi Iwai <tiwai@suse.de>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #include <sound/driver.h>
25 #include <linux/init.h>
26 #include <linux/smp_lock.h>
27 #include <linux/slab.h>
28 #include <sound/core.h>
29 #include <sound/minors.h>
30 #include <linux/kmod.h>
32 #include <sound/seq_kernel.h>
33 #include "seq_clientmgr.h"
34 #include "seq_memory.h"
35 #include "seq_queue.h"
36 #include "seq_timer.h"
38 #include "seq_system.h"
39 #include <sound/seq_device.h>
41 #include <linux/compat.h>
46 * this module handles the connections of userland and kernel clients
50 #define SNDRV_SEQ_LFLG_INPUT 0x0001
51 #define SNDRV_SEQ_LFLG_OUTPUT 0x0002
52 #define SNDRV_SEQ_LFLG_OPEN (SNDRV_SEQ_LFLG_INPUT|SNDRV_SEQ_LFLG_OUTPUT)
54 static DEFINE_SPINLOCK(clients_lock
);
55 static DECLARE_MUTEX(register_mutex
);
60 static char clienttablock
[SNDRV_SEQ_MAX_CLIENTS
];
61 static client_t
*clienttab
[SNDRV_SEQ_MAX_CLIENTS
];
62 static usage_t client_usage
;
67 static int bounce_error_event(client_t
*client
, snd_seq_event_t
*event
, int err
, int atomic
, int hop
);
68 static int snd_seq_deliver_single_event(client_t
*client
, snd_seq_event_t
*event
, int filter
, int atomic
, int hop
);
73 static inline mm_segment_t
snd_enter_user(void)
75 mm_segment_t fs
= get_fs();
80 static inline void snd_leave_user(mm_segment_t fs
)
87 static inline unsigned short snd_seq_file_flags(struct file
*file
)
89 switch (file
->f_mode
& (FMODE_READ
| FMODE_WRITE
)) {
91 return SNDRV_SEQ_LFLG_OUTPUT
;
93 return SNDRV_SEQ_LFLG_INPUT
;
95 return SNDRV_SEQ_LFLG_OPEN
;
99 static inline int snd_seq_write_pool_allocated(client_t
*client
)
101 return snd_seq_total_cells(client
->pool
) > 0;
104 /* return pointer to client structure for specified id */
105 static client_t
*clientptr(int clientid
)
107 if (clientid
< 0 || clientid
>= SNDRV_SEQ_MAX_CLIENTS
) {
108 snd_printd("Seq: oops. Trying to get pointer to client %d\n", clientid
);
111 return clienttab
[clientid
];
114 extern int seq_client_load
[];
116 client_t
*snd_seq_client_use_ptr(int clientid
)
121 if (clientid
< 0 || clientid
>= SNDRV_SEQ_MAX_CLIENTS
) {
122 snd_printd("Seq: oops. Trying to get pointer to client %d\n", clientid
);
125 spin_lock_irqsave(&clients_lock
, flags
);
126 client
= clientptr(clientid
);
129 if (clienttablock
[clientid
]) {
130 spin_unlock_irqrestore(&clients_lock
, flags
);
133 spin_unlock_irqrestore(&clients_lock
, flags
);
135 if (!in_interrupt() && current
->fs
->root
) {
136 static char client_requested
[64];
137 static char card_requested
[SNDRV_CARDS
];
141 if (! client_requested
[clientid
] && current
->fs
->root
) {
142 client_requested
[clientid
] = 1;
143 for (idx
= 0; idx
< 64; idx
++) {
144 if (seq_client_load
[idx
] < 0)
146 if (seq_client_load
[idx
] == clientid
) {
147 request_module("snd-seq-client-%i", clientid
);
152 } else if (clientid
>= 64 && clientid
< 128) {
153 int card
= (clientid
- 64) / 8;
154 if (card
< snd_ecards_limit
) {
155 if (! card_requested
[card
]) {
156 card_requested
[card
] = 1;
157 snd_request_card(card
);
159 snd_seq_device_load_drivers();
162 spin_lock_irqsave(&clients_lock
, flags
);
163 client
= clientptr(clientid
);
166 spin_unlock_irqrestore(&clients_lock
, flags
);
172 snd_use_lock_use(&client
->use_lock
);
173 spin_unlock_irqrestore(&clients_lock
, flags
);
177 static void usage_alloc(usage_t
* res
, int num
)
180 if (res
->cur
> res
->peak
)
181 res
->peak
= res
->cur
;
184 static void usage_free(usage_t
* res
, int num
)
189 /* initialise data structures */
190 int __init
client_init_data(void)
192 /* zap out the client table */
193 memset(&clienttablock
, 0, sizeof(clienttablock
));
194 memset(&clienttab
, 0, sizeof(clienttab
));
199 static client_t
*seq_create_client1(int client_index
, int poolsize
)
205 /* init client data */
206 client
= kzalloc(sizeof(*client
), GFP_KERNEL
);
209 client
->pool
= snd_seq_pool_new(poolsize
);
210 if (client
->pool
== NULL
) {
214 client
->type
= NO_CLIENT
;
215 snd_use_lock_init(&client
->use_lock
);
216 rwlock_init(&client
->ports_lock
);
217 init_MUTEX(&client
->ports_mutex
);
218 INIT_LIST_HEAD(&client
->ports_list_head
);
220 /* find free slot in the client table */
221 spin_lock_irqsave(&clients_lock
, flags
);
222 if (client_index
< 0) {
223 for (c
= 128; c
< SNDRV_SEQ_MAX_CLIENTS
; c
++) {
224 if (clienttab
[c
] || clienttablock
[c
])
226 clienttab
[client
->number
= c
] = client
;
227 spin_unlock_irqrestore(&clients_lock
, flags
);
231 if (clienttab
[client_index
] == NULL
&& !clienttablock
[client_index
]) {
232 clienttab
[client
->number
= client_index
] = client
;
233 spin_unlock_irqrestore(&clients_lock
, flags
);
237 spin_unlock_irqrestore(&clients_lock
, flags
);
238 snd_seq_pool_delete(&client
->pool
);
240 return NULL
; /* no free slot found or busy, return failure code */
244 static int seq_free_client1(client_t
*client
)
248 snd_assert(client
!= NULL
, return -EINVAL
);
249 snd_seq_delete_all_ports(client
);
250 snd_seq_queue_client_leave(client
->number
);
251 spin_lock_irqsave(&clients_lock
, flags
);
252 clienttablock
[client
->number
] = 1;
253 clienttab
[client
->number
] = NULL
;
254 spin_unlock_irqrestore(&clients_lock
, flags
);
255 snd_use_lock_sync(&client
->use_lock
);
256 snd_seq_queue_client_termination(client
->number
);
258 snd_seq_pool_delete(&client
->pool
);
259 spin_lock_irqsave(&clients_lock
, flags
);
260 clienttablock
[client
->number
] = 0;
261 spin_unlock_irqrestore(&clients_lock
, flags
);
266 static void seq_free_client(client_t
* client
)
268 down(®ister_mutex
);
269 switch (client
->type
) {
271 snd_printk(KERN_WARNING
"Seq: Trying to free unused client %d\n", client
->number
);
275 seq_free_client1(client
);
276 usage_free(&client_usage
, 1);
280 snd_printk(KERN_ERR
"Seq: Trying to free client %d with undefined type = %d\n", client
->number
, client
->type
);
284 snd_seq_system_client_ev_client_exit(client
->number
);
289 /* -------------------------------------------------------- */
291 /* create a user client */
292 static int snd_seq_open(struct inode
*inode
, struct file
*file
)
294 int c
, mode
; /* client id */
298 if (down_interruptible(®ister_mutex
))
300 client
= seq_create_client1(-1, SNDRV_SEQ_DEFAULT_EVENTS
);
301 if (client
== NULL
) {
303 return -ENOMEM
; /* failure code */
306 mode
= snd_seq_file_flags(file
);
307 if (mode
& SNDRV_SEQ_LFLG_INPUT
)
308 client
->accept_input
= 1;
309 if (mode
& SNDRV_SEQ_LFLG_OUTPUT
)
310 client
->accept_output
= 1;
312 user
= &client
->data
.user
;
314 user
->fifo_pool_size
= 0;
316 if (mode
& SNDRV_SEQ_LFLG_INPUT
) {
317 user
->fifo_pool_size
= SNDRV_SEQ_DEFAULT_CLIENT_EVENTS
;
318 user
->fifo
= snd_seq_fifo_new(user
->fifo_pool_size
);
319 if (user
->fifo
== NULL
) {
320 seq_free_client1(client
);
327 usage_alloc(&client_usage
, 1);
328 client
->type
= USER_CLIENT
;
332 file
->private_data
= client
;
334 /* fill client data */
336 sprintf(client
->name
, "Client-%d", c
);
338 /* make others aware this new client */
339 snd_seq_system_client_ev_client_start(c
);
344 /* delete a user client */
345 static int snd_seq_release(struct inode
*inode
, struct file
*file
)
347 client_t
*client
= (client_t
*) file
->private_data
;
350 seq_free_client(client
);
351 if (client
->data
.user
.fifo
)
352 snd_seq_fifo_delete(&client
->data
.user
.fifo
);
360 /* handle client read() */
361 /* possible error values:
362 * -ENXIO invalid client or file open mode
363 * -ENOSPC FIFO overflow (the flag is cleared after this error report)
364 * -EINVAL no enough user-space buffer to write the whole event
365 * -EFAULT seg. fault during copy to user space
367 static ssize_t
snd_seq_read(struct file
*file
, char __user
*buf
, size_t count
, loff_t
*offset
)
369 client_t
*client
= (client_t
*) file
->private_data
;
373 snd_seq_event_cell_t
*cell
;
375 if (!(snd_seq_file_flags(file
) & SNDRV_SEQ_LFLG_INPUT
))
378 if (!access_ok(VERIFY_WRITE
, buf
, count
))
381 /* check client structures are in place */
382 snd_assert(client
!= NULL
, return -ENXIO
);
384 if (!client
->accept_input
|| (fifo
= client
->data
.user
.fifo
) == NULL
)
387 if (atomic_read(&fifo
->overflow
) > 0) {
388 /* buffer overflow is detected */
389 snd_seq_fifo_clear(fifo
);
390 /* return error code */
396 snd_seq_fifo_lock(fifo
);
398 /* while data available in queue */
399 while (count
>= sizeof(snd_seq_event_t
)) {
402 nonblock
= (file
->f_flags
& O_NONBLOCK
) || result
> 0;
403 if ((err
= snd_seq_fifo_cell_out(fifo
, &cell
, nonblock
)) < 0) {
406 if (snd_seq_ev_is_variable(&cell
->event
)) {
407 snd_seq_event_t tmpev
;
409 tmpev
.data
.ext
.len
&= ~SNDRV_SEQ_EXT_MASK
;
410 if (copy_to_user(buf
, &tmpev
, sizeof(snd_seq_event_t
))) {
414 count
-= sizeof(snd_seq_event_t
);
415 buf
+= sizeof(snd_seq_event_t
);
416 err
= snd_seq_expand_var_event(&cell
->event
, count
,
417 (char __force
*)buf
, 0,
418 sizeof(snd_seq_event_t
));
425 if (copy_to_user(buf
, &cell
->event
, sizeof(snd_seq_event_t
))) {
429 count
-= sizeof(snd_seq_event_t
);
430 buf
+= sizeof(snd_seq_event_t
);
432 snd_seq_cell_free(cell
);
433 cell
= NULL
; /* to be sure */
434 result
+= sizeof(snd_seq_event_t
);
439 snd_seq_fifo_cell_putback(fifo
, cell
);
440 if (err
== -EAGAIN
&& result
> 0)
443 snd_seq_fifo_unlock(fifo
);
445 return (err
< 0) ? err
: result
;
450 * check access permission to the port
452 static int check_port_perm(client_port_t
*port
, unsigned int flags
)
454 if ((port
->capability
& flags
) != flags
)
460 * check if the destination client is available, and return the pointer
461 * if filter is non-zero, client filter bitmap is tested.
463 static client_t
*get_event_dest_client(snd_seq_event_t
*event
, int filter
)
467 dest
= snd_seq_client_use_ptr(event
->dest
.client
);
470 if (! dest
->accept_input
)
472 if ((dest
->filter
& SNDRV_SEQ_FILTER_USE_EVENT
) &&
473 ! test_bit(event
->type
, dest
->event_filter
))
475 if (filter
&& !(dest
->filter
& filter
))
478 return dest
; /* ok - accessible */
480 snd_seq_client_unlock(dest
);
486 * Return the error event.
488 * If the receiver client is a user client, the original event is
489 * encapsulated in SNDRV_SEQ_EVENT_BOUNCE as variable length event. If
490 * the original event is also variable length, the external data is
491 * copied after the event record.
492 * If the receiver client is a kernel client, the original event is
493 * quoted in SNDRV_SEQ_EVENT_KERNEL_ERROR, since this requires no extra
496 static int bounce_error_event(client_t
*client
, snd_seq_event_t
*event
,
497 int err
, int atomic
, int hop
)
499 snd_seq_event_t bounce_ev
;
502 if (client
== NULL
||
503 ! (client
->filter
& SNDRV_SEQ_FILTER_BOUNCE
) ||
504 ! client
->accept_input
)
505 return 0; /* ignored */
507 /* set up quoted error */
508 memset(&bounce_ev
, 0, sizeof(bounce_ev
));
509 bounce_ev
.type
= SNDRV_SEQ_EVENT_KERNEL_ERROR
;
510 bounce_ev
.flags
= SNDRV_SEQ_EVENT_LENGTH_FIXED
;
511 bounce_ev
.queue
= SNDRV_SEQ_QUEUE_DIRECT
;
512 bounce_ev
.source
.client
= SNDRV_SEQ_CLIENT_SYSTEM
;
513 bounce_ev
.source
.port
= SNDRV_SEQ_PORT_SYSTEM_ANNOUNCE
;
514 bounce_ev
.dest
.client
= client
->number
;
515 bounce_ev
.dest
.port
= event
->source
.port
;
516 bounce_ev
.data
.quote
.origin
= event
->dest
;
517 bounce_ev
.data
.quote
.event
= event
;
518 bounce_ev
.data
.quote
.value
= -err
; /* use positive value */
519 result
= snd_seq_deliver_single_event(NULL
, &bounce_ev
, 0, atomic
, hop
+ 1);
521 client
->event_lost
++;
530 * rewrite the time-stamp of the event record with the curren time
531 * of the given queue.
532 * return non-zero if updated.
534 static int update_timestamp_of_queue(snd_seq_event_t
*event
, int queue
, int real_time
)
541 event
->queue
= queue
;
542 event
->flags
&= ~SNDRV_SEQ_TIME_STAMP_MASK
;
544 event
->time
.time
= snd_seq_timer_get_cur_time(q
->timer
);
545 event
->flags
|= SNDRV_SEQ_TIME_STAMP_REAL
;
547 event
->time
.tick
= snd_seq_timer_get_cur_tick(q
->timer
);
548 event
->flags
|= SNDRV_SEQ_TIME_STAMP_TICK
;
556 * deliver an event to the specified destination.
557 * if filter is non-zero, client filter bitmap is tested.
559 * RETURN VALUE: 0 : if succeeded
562 static int snd_seq_deliver_single_event(client_t
*client
,
563 snd_seq_event_t
*event
,
564 int filter
, int atomic
, int hop
)
566 client_t
*dest
= NULL
;
567 client_port_t
*dest_port
= NULL
;
568 int result
= -ENOENT
;
571 direct
= snd_seq_ev_is_direct(event
);
573 dest
= get_event_dest_client(event
, filter
);
576 dest_port
= snd_seq_port_use_ptr(dest
, event
->dest
.port
);
577 if (dest_port
== NULL
)
580 /* check permission */
581 if (! check_port_perm(dest_port
, SNDRV_SEQ_PORT_CAP_WRITE
)) {
586 if (dest_port
->timestamping
)
587 update_timestamp_of_queue(event
, dest_port
->time_queue
,
588 dest_port
->time_real
);
590 switch (dest
->type
) {
592 if (dest
->data
.user
.fifo
)
593 result
= snd_seq_fifo_event_in(dest
->data
.user
.fifo
, event
);
597 if (dest_port
->event_input
== NULL
)
599 result
= dest_port
->event_input(event
, direct
, dest_port
->private_data
, atomic
, hop
);
607 snd_seq_port_unlock(dest_port
);
609 snd_seq_client_unlock(dest
);
611 if (result
< 0 && !direct
) {
612 result
= bounce_error_event(client
, event
, result
, atomic
, hop
);
619 * send the event to all subscribers:
621 static int deliver_to_subscribers(client_t
*client
,
622 snd_seq_event_t
*event
,
626 int err
= 0, num_ev
= 0;
627 snd_seq_event_t event_saved
;
628 client_port_t
*src_port
;
630 port_subs_info_t
*grp
;
632 src_port
= snd_seq_port_use_ptr(client
, event
->source
.port
);
633 if (src_port
== NULL
)
634 return -EINVAL
; /* invalid source port */
635 /* save original event record */
636 event_saved
= *event
;
637 grp
= &src_port
->c_src
;
641 read_lock(&grp
->list_lock
);
643 down_read(&grp
->list_mutex
);
644 list_for_each(p
, &grp
->list_head
) {
645 subs
= list_entry(p
, subscribers_t
, src_list
);
646 event
->dest
= subs
->info
.dest
;
647 if (subs
->info
.flags
& SNDRV_SEQ_PORT_SUBS_TIMESTAMP
)
648 /* convert time according to flag with subscription */
649 update_timestamp_of_queue(event
, subs
->info
.queue
,
650 subs
->info
.flags
& SNDRV_SEQ_PORT_SUBS_TIME_REAL
);
651 err
= snd_seq_deliver_single_event(client
, event
,
656 /* restore original event record */
657 *event
= event_saved
;
660 read_unlock(&grp
->list_lock
);
662 up_read(&grp
->list_mutex
);
663 *event
= event_saved
; /* restore */
664 snd_seq_port_unlock(src_port
);
665 return (err
< 0) ? err
: num_ev
;
669 #ifdef SUPPORT_BROADCAST
671 * broadcast to all ports:
673 static int port_broadcast_event(client_t
*client
,
674 snd_seq_event_t
*event
,
677 int num_ev
= 0, err
= 0;
678 client_t
*dest_client
;
681 dest_client
= get_event_dest_client(event
, SNDRV_SEQ_FILTER_BROADCAST
);
682 if (dest_client
== NULL
)
683 return 0; /* no matching destination */
685 read_lock(&dest_client
->ports_lock
);
686 list_for_each(p
, &dest_client
->ports_list_head
) {
687 client_port_t
*port
= list_entry(p
, client_port_t
, list
);
688 event
->dest
.port
= port
->addr
.port
;
689 /* pass NULL as source client to avoid error bounce */
690 err
= snd_seq_deliver_single_event(NULL
, event
,
691 SNDRV_SEQ_FILTER_BROADCAST
,
697 read_unlock(&dest_client
->ports_lock
);
698 snd_seq_client_unlock(dest_client
);
699 event
->dest
.port
= SNDRV_SEQ_ADDRESS_BROADCAST
; /* restore */
700 return (err
< 0) ? err
: num_ev
;
704 * send the event to all clients:
705 * if destination port is also ADDRESS_BROADCAST, deliver to all ports.
707 static int broadcast_event(client_t
*client
,
708 snd_seq_event_t
*event
, int atomic
, int hop
)
710 int err
= 0, num_ev
= 0;
714 addr
= event
->dest
; /* save */
716 for (dest
= 0; dest
< SNDRV_SEQ_MAX_CLIENTS
; dest
++) {
717 /* don't send to itself */
718 if (dest
== client
->number
)
720 event
->dest
.client
= dest
;
721 event
->dest
.port
= addr
.port
;
722 if (addr
.port
== SNDRV_SEQ_ADDRESS_BROADCAST
)
723 err
= port_broadcast_event(client
, event
, atomic
, hop
);
725 /* pass NULL as source client to avoid error bounce */
726 err
= snd_seq_deliver_single_event(NULL
, event
,
727 SNDRV_SEQ_FILTER_BROADCAST
,
733 event
->dest
= addr
; /* restore */
734 return (err
< 0) ? err
: num_ev
;
738 /* multicast - not supported yet */
739 static int multicast_event(client_t
*client
, snd_seq_event_t
*event
,
742 snd_printd("seq: multicast not supported yet.\n");
743 return 0; /* ignored */
745 #endif /* SUPPORT_BROADCAST */
748 /* deliver an event to the destination port(s).
749 * if the event is to subscribers or broadcast, the event is dispatched
750 * to multiple targets.
752 * RETURN VALUE: n > 0 : the number of delivered events.
753 * n == 0 : the event was not passed to any client.
754 * n < 0 : error - event was not processed.
756 static int snd_seq_deliver_event(client_t
*client
, snd_seq_event_t
*event
,
762 if (hop
>= SNDRV_SEQ_MAX_HOPS
) {
763 snd_printd("too long delivery path (%d:%d->%d:%d)\n",
764 event
->source
.client
, event
->source
.port
,
765 event
->dest
.client
, event
->dest
.port
);
769 if (event
->queue
== SNDRV_SEQ_ADDRESS_SUBSCRIBERS
||
770 event
->dest
.client
== SNDRV_SEQ_ADDRESS_SUBSCRIBERS
)
771 result
= deliver_to_subscribers(client
, event
, atomic
, hop
);
772 #ifdef SUPPORT_BROADCAST
773 else if (event
->queue
== SNDRV_SEQ_ADDRESS_BROADCAST
||
774 event
->dest
.client
== SNDRV_SEQ_ADDRESS_BROADCAST
)
775 result
= broadcast_event(client
, event
, atomic
, hop
);
776 else if (event
->dest
.client
>= SNDRV_SEQ_MAX_CLIENTS
)
777 result
= multicast_event(client
, event
, atomic
, hop
);
778 else if (event
->dest
.port
== SNDRV_SEQ_ADDRESS_BROADCAST
)
779 result
= port_broadcast_event(client
, event
, atomic
, hop
);
782 result
= snd_seq_deliver_single_event(client
, event
, 0, atomic
, hop
);
788 * dispatch an event cell:
789 * This function is called only from queue check routines in timer
790 * interrupts or after enqueued.
791 * The event cell shall be released or re-queued in this function.
793 * RETURN VALUE: n > 0 : the number of delivered events.
794 * n == 0 : the event was not passed to any client.
795 * n < 0 : error - event was not processed.
797 int snd_seq_dispatch_event(snd_seq_event_cell_t
*cell
, int atomic
, int hop
)
802 snd_assert(cell
!= NULL
, return -EINVAL
);
804 client
= snd_seq_client_use_ptr(cell
->event
.source
.client
);
805 if (client
== NULL
) {
806 snd_seq_cell_free(cell
); /* release this cell */
810 if (cell
->event
.type
== SNDRV_SEQ_EVENT_NOTE
) {
812 * the event cell is re-used as a NOTE-OFF event and
815 snd_seq_event_t tmpev
, *ev
;
817 /* reserve this event to enqueue note-off later */
819 tmpev
.type
= SNDRV_SEQ_EVENT_NOTEON
;
820 result
= snd_seq_deliver_event(client
, &tmpev
, atomic
, hop
);
823 * This was originally a note event. We now re-use the
824 * cell for the note-off event.
828 ev
->type
= SNDRV_SEQ_EVENT_NOTEOFF
;
829 ev
->flags
|= SNDRV_SEQ_PRIORITY_HIGH
;
831 /* add the duration time */
832 switch (ev
->flags
& SNDRV_SEQ_TIME_STAMP_MASK
) {
833 case SNDRV_SEQ_TIME_STAMP_TICK
:
834 ev
->time
.tick
+= ev
->data
.note
.duration
;
836 case SNDRV_SEQ_TIME_STAMP_REAL
:
837 /* unit for duration is ms */
838 ev
->time
.time
.tv_nsec
+= 1000000 * (ev
->data
.note
.duration
% 1000);
839 ev
->time
.time
.tv_sec
+= ev
->data
.note
.duration
/ 1000 +
840 ev
->time
.time
.tv_nsec
/ 1000000000;
841 ev
->time
.time
.tv_nsec
%= 1000000000;
844 ev
->data
.note
.velocity
= ev
->data
.note
.off_velocity
;
846 /* Now queue this cell as the note off event */
847 if (snd_seq_enqueue_event(cell
, atomic
, hop
) < 0)
848 snd_seq_cell_free(cell
); /* release this cell */
852 * event cell is freed after processing the event
855 result
= snd_seq_deliver_event(client
, &cell
->event
, atomic
, hop
);
856 snd_seq_cell_free(cell
);
859 snd_seq_client_unlock(client
);
864 /* Allocate a cell from client pool and enqueue it to queue:
865 * if pool is empty and blocking is TRUE, sleep until a new cell is
868 static int snd_seq_client_enqueue_event(client_t
*client
,
869 snd_seq_event_t
*event
,
870 struct file
*file
, int blocking
,
873 snd_seq_event_cell_t
*cell
;
876 /* special queue values - force direct passing */
877 if (event
->queue
== SNDRV_SEQ_ADDRESS_SUBSCRIBERS
) {
878 event
->dest
.client
= SNDRV_SEQ_ADDRESS_SUBSCRIBERS
;
879 event
->queue
= SNDRV_SEQ_QUEUE_DIRECT
;
881 #ifdef SUPPORT_BROADCAST
882 if (event
->queue
== SNDRV_SEQ_ADDRESS_BROADCAST
) {
883 event
->dest
.client
= SNDRV_SEQ_ADDRESS_BROADCAST
;
884 event
->queue
= SNDRV_SEQ_QUEUE_DIRECT
;
887 if (event
->dest
.client
== SNDRV_SEQ_ADDRESS_SUBSCRIBERS
) {
888 /* check presence of source port */
889 client_port_t
*src_port
= snd_seq_port_use_ptr(client
, event
->source
.port
);
890 if (src_port
== NULL
)
892 snd_seq_port_unlock(src_port
);
895 /* direct event processing without enqueued */
896 if (snd_seq_ev_is_direct(event
)) {
897 if (event
->type
== SNDRV_SEQ_EVENT_NOTE
)
898 return -EINVAL
; /* this event must be enqueued! */
899 return snd_seq_deliver_event(client
, event
, atomic
, hop
);
902 /* Not direct, normal queuing */
903 if (snd_seq_queue_is_used(event
->queue
, client
->number
) <= 0)
904 return -EINVAL
; /* invalid queue */
905 if (! snd_seq_write_pool_allocated(client
))
906 return -ENXIO
; /* queue is not allocated */
908 /* allocate an event cell */
909 err
= snd_seq_event_dup(client
->pool
, event
, &cell
, !blocking
|| atomic
, file
);
913 /* we got a cell. enqueue it. */
914 if ((err
= snd_seq_enqueue_event(cell
, atomic
, hop
)) < 0) {
915 snd_seq_cell_free(cell
);
924 * check validity of event type and data length.
925 * return non-zero if invalid.
927 static int check_event_type_and_length(snd_seq_event_t
*ev
)
929 switch (snd_seq_ev_length_type(ev
)) {
930 case SNDRV_SEQ_EVENT_LENGTH_FIXED
:
931 if (snd_seq_ev_is_variable_type(ev
))
934 case SNDRV_SEQ_EVENT_LENGTH_VARIABLE
:
935 if (! snd_seq_ev_is_variable_type(ev
) ||
936 (ev
->data
.ext
.len
& ~SNDRV_SEQ_EXT_MASK
) >= SNDRV_SEQ_MAX_EVENT_LEN
)
939 case SNDRV_SEQ_EVENT_LENGTH_VARUSR
:
940 if (! snd_seq_ev_is_instr_type(ev
) ||
941 ! snd_seq_ev_is_direct(ev
))
950 /* possible error values:
951 * -ENXIO invalid client or file open mode
952 * -ENOMEM malloc failed
953 * -EFAULT seg. fault during copy from user space
954 * -EINVAL invalid event
955 * -EAGAIN no space in output pool
956 * -EINTR interrupts while sleep
957 * -EMLINK too many hops
958 * others depends on return value from driver callback
960 static ssize_t
snd_seq_write(struct file
*file
, const char __user
*buf
, size_t count
, loff_t
*offset
)
962 client_t
*client
= (client_t
*) file
->private_data
;
963 int written
= 0, len
;
965 snd_seq_event_t event
;
967 if (!(snd_seq_file_flags(file
) & SNDRV_SEQ_LFLG_OUTPUT
))
970 /* check client structures are in place */
971 snd_assert(client
!= NULL
, return -ENXIO
);
973 if (!client
->accept_output
|| client
->pool
== NULL
)
976 /* allocate the pool now if the pool is not allocated yet */
977 if (client
->pool
->size
> 0 && !snd_seq_write_pool_allocated(client
)) {
978 if (snd_seq_pool_init(client
->pool
) < 0)
982 /* only process whole events */
983 while (count
>= sizeof(snd_seq_event_t
)) {
984 /* Read in the event header from the user */
986 if (copy_from_user(&event
, buf
, len
)) {
990 event
.source
.client
= client
->number
; /* fill in client number */
991 /* Check for extension data length */
992 if (check_event_type_and_length(&event
)) {
997 /* check for special events */
998 if (event
.type
== SNDRV_SEQ_EVENT_NONE
)
1000 else if (snd_seq_ev_is_reserved(&event
)) {
1005 if (snd_seq_ev_is_variable(&event
)) {
1006 int extlen
= event
.data
.ext
.len
& ~SNDRV_SEQ_EXT_MASK
;
1007 if ((size_t)(extlen
+ len
) > count
) {
1008 /* back out, will get an error this time or next */
1012 /* set user space pointer */
1013 event
.data
.ext
.len
= extlen
| SNDRV_SEQ_EXT_USRPTR
;
1014 event
.data
.ext
.ptr
= (char __force
*)buf
1015 + sizeof(snd_seq_event_t
);
1016 len
+= extlen
; /* increment data length */
1018 #ifdef CONFIG_COMPAT
1019 if (client
->convert32
&& snd_seq_ev_is_varusr(&event
)) {
1020 void *ptr
= compat_ptr(event
.data
.raw32
.d
[1]);
1021 event
.data
.ext
.ptr
= ptr
;
1026 /* ok, enqueue it */
1027 err
= snd_seq_client_enqueue_event(client
, &event
, file
,
1028 !(file
->f_flags
& O_NONBLOCK
),
1034 /* Update pointers and counts */
1040 return written
? written
: err
;
1047 static unsigned int snd_seq_poll(struct file
*file
, poll_table
* wait
)
1049 client_t
*client
= (client_t
*) file
->private_data
;
1050 unsigned int mask
= 0;
1052 /* check client structures are in place */
1053 snd_assert(client
!= NULL
, return -ENXIO
);
1055 if ((snd_seq_file_flags(file
) & SNDRV_SEQ_LFLG_INPUT
) &&
1056 client
->data
.user
.fifo
) {
1058 /* check if data is available in the outqueue */
1059 if (snd_seq_fifo_poll_wait(client
->data
.user
.fifo
, file
, wait
))
1060 mask
|= POLLIN
| POLLRDNORM
;
1063 if (snd_seq_file_flags(file
) & SNDRV_SEQ_LFLG_OUTPUT
) {
1065 /* check if data is available in the pool */
1066 if (!snd_seq_write_pool_allocated(client
) ||
1067 snd_seq_pool_poll_wait(client
->pool
, file
, wait
))
1068 mask
|= POLLOUT
| POLLWRNORM
;
1075 /*-----------------------------------------------------*/
1078 /* SYSTEM_INFO ioctl() */
1079 static int snd_seq_ioctl_system_info(client_t
*client
, void __user
*arg
)
1081 snd_seq_system_info_t info
;
1083 memset(&info
, 0, sizeof(info
));
1084 /* fill the info fields */
1085 info
.queues
= SNDRV_SEQ_MAX_QUEUES
;
1086 info
.clients
= SNDRV_SEQ_MAX_CLIENTS
;
1087 info
.ports
= 256; /* fixed limit */
1088 info
.channels
= 256; /* fixed limit */
1089 info
.cur_clients
= client_usage
.cur
;
1090 info
.cur_queues
= snd_seq_queue_get_cur_queues();
1092 if (copy_to_user(arg
, &info
, sizeof(info
)))
1098 /* RUNNING_MODE ioctl() */
1099 static int snd_seq_ioctl_running_mode(client_t
*client
, void __user
*arg
)
1101 struct sndrv_seq_running_info info
;
1105 if (copy_from_user(&info
, arg
, sizeof(info
)))
1108 /* requested client number */
1109 cptr
= snd_seq_client_use_ptr(info
.client
);
1111 return -ENOENT
; /* don't change !!! */
1113 #ifdef SNDRV_BIG_ENDIAN
1114 if (! info
.big_endian
) {
1119 if (info
.big_endian
) {
1125 if (info
.cpu_mode
> sizeof(long)) {
1129 cptr
->convert32
= (info
.cpu_mode
< sizeof(long));
1131 snd_seq_client_unlock(cptr
);
1135 /* CLIENT_INFO ioctl() */
1136 static void get_client_info(client_t
*cptr
, snd_seq_client_info_t
*info
)
1138 info
->client
= cptr
->number
;
1140 /* fill the info fields */
1141 info
->type
= cptr
->type
;
1142 strcpy(info
->name
, cptr
->name
);
1143 info
->filter
= cptr
->filter
;
1144 info
->event_lost
= cptr
->event_lost
;
1145 memcpy(info
->event_filter
, cptr
->event_filter
, 32);
1146 info
->num_ports
= cptr
->num_ports
;
1147 memset(info
->reserved
, 0, sizeof(info
->reserved
));
1150 static int snd_seq_ioctl_get_client_info(client_t
* client
, void __user
*arg
)
1153 snd_seq_client_info_t client_info
;
1155 if (copy_from_user(&client_info
, arg
, sizeof(client_info
)))
1158 /* requested client number */
1159 cptr
= snd_seq_client_use_ptr(client_info
.client
);
1161 return -ENOENT
; /* don't change !!! */
1163 get_client_info(cptr
, &client_info
);
1164 snd_seq_client_unlock(cptr
);
1166 if (copy_to_user(arg
, &client_info
, sizeof(client_info
)))
1172 /* CLIENT_INFO ioctl() */
1173 static int snd_seq_ioctl_set_client_info(client_t
* client
, void __user
*arg
)
1175 snd_seq_client_info_t client_info
;
1177 if (copy_from_user(&client_info
, arg
, sizeof(client_info
)))
1180 /* it is not allowed to set the info fields for an another client */
1181 if (client
->number
!= client_info
.client
)
1183 /* also client type must be set now */
1184 if (client
->type
!= client_info
.type
)
1187 /* fill the info fields */
1188 if (client_info
.name
[0])
1189 strlcpy(client
->name
, client_info
.name
, sizeof(client
->name
));
1191 client
->filter
= client_info
.filter
;
1192 client
->event_lost
= client_info
.event_lost
;
1193 memcpy(client
->event_filter
, client_info
.event_filter
, 32);
1200 * CREATE PORT ioctl()
1202 static int snd_seq_ioctl_create_port(client_t
* client
, void __user
*arg
)
1204 client_port_t
*port
;
1205 snd_seq_port_info_t info
;
1206 snd_seq_port_callback_t
*callback
;
1208 if (copy_from_user(&info
, arg
, sizeof(info
)))
1211 /* it is not allowed to create the port for an another client */
1212 if (info
.addr
.client
!= client
->number
)
1215 port
= snd_seq_create_port(client
, (info
.flags
& SNDRV_SEQ_PORT_FLG_GIVEN_PORT
) ? info
.addr
.port
: -1);
1219 if (client
->type
== USER_CLIENT
&& info
.kernel
) {
1220 snd_seq_delete_port(client
, port
->addr
.port
);
1223 if (client
->type
== KERNEL_CLIENT
) {
1224 if ((callback
= info
.kernel
) != NULL
) {
1225 if (callback
->owner
)
1226 port
->owner
= callback
->owner
;
1227 port
->private_data
= callback
->private_data
;
1228 port
->private_free
= callback
->private_free
;
1229 port
->callback_all
= callback
->callback_all
;
1230 port
->event_input
= callback
->event_input
;
1231 port
->c_src
.open
= callback
->subscribe
;
1232 port
->c_src
.close
= callback
->unsubscribe
;
1233 port
->c_dest
.open
= callback
->use
;
1234 port
->c_dest
.close
= callback
->unuse
;
1238 info
.addr
= port
->addr
;
1240 snd_seq_set_port_info(port
, &info
);
1241 snd_seq_system_client_ev_port_start(port
->addr
.client
, port
->addr
.port
);
1243 if (copy_to_user(arg
, &info
, sizeof(info
)))
1250 * DELETE PORT ioctl()
1252 static int snd_seq_ioctl_delete_port(client_t
* client
, void __user
*arg
)
1254 snd_seq_port_info_t info
;
1257 /* set passed parameters */
1258 if (copy_from_user(&info
, arg
, sizeof(info
)))
1261 /* it is not allowed to remove the port for an another client */
1262 if (info
.addr
.client
!= client
->number
)
1265 err
= snd_seq_delete_port(client
, info
.addr
.port
);
1267 snd_seq_system_client_ev_port_exit(client
->number
, info
.addr
.port
);
1273 * GET_PORT_INFO ioctl() (on any client)
1275 static int snd_seq_ioctl_get_port_info(client_t
*client
, void __user
*arg
)
1278 client_port_t
*port
;
1279 snd_seq_port_info_t info
;
1281 if (copy_from_user(&info
, arg
, sizeof(info
)))
1283 cptr
= snd_seq_client_use_ptr(info
.addr
.client
);
1287 port
= snd_seq_port_use_ptr(cptr
, info
.addr
.port
);
1289 snd_seq_client_unlock(cptr
);
1290 return -ENOENT
; /* don't change */
1294 snd_seq_get_port_info(port
, &info
);
1295 snd_seq_port_unlock(port
);
1296 snd_seq_client_unlock(cptr
);
1298 if (copy_to_user(arg
, &info
, sizeof(info
)))
1305 * SET_PORT_INFO ioctl() (only ports on this/own client)
1307 static int snd_seq_ioctl_set_port_info(client_t
* client
, void __user
*arg
)
1309 client_port_t
*port
;
1310 snd_seq_port_info_t info
;
1312 if (copy_from_user(&info
, arg
, sizeof(info
)))
1315 if (info
.addr
.client
!= client
->number
) /* only set our own ports ! */
1317 port
= snd_seq_port_use_ptr(client
, info
.addr
.port
);
1319 snd_seq_set_port_info(port
, &info
);
1320 snd_seq_port_unlock(port
);
1327 * port subscription (connection)
1329 #define PERM_RD (SNDRV_SEQ_PORT_CAP_READ|SNDRV_SEQ_PORT_CAP_SUBS_READ)
1330 #define PERM_WR (SNDRV_SEQ_PORT_CAP_WRITE|SNDRV_SEQ_PORT_CAP_SUBS_WRITE)
1332 static int check_subscription_permission(client_t
*client
, client_port_t
*sport
,
1333 client_port_t
*dport
,
1334 snd_seq_port_subscribe_t
*subs
)
1336 if (client
->number
!= subs
->sender
.client
&&
1337 client
->number
!= subs
->dest
.client
) {
1338 /* connection by third client - check export permission */
1339 if (check_port_perm(sport
, SNDRV_SEQ_PORT_CAP_NO_EXPORT
))
1341 if (check_port_perm(dport
, SNDRV_SEQ_PORT_CAP_NO_EXPORT
))
1345 /* check read permission */
1346 /* if sender or receiver is the subscribing client itself,
1347 * no permission check is necessary
1349 if (client
->number
!= subs
->sender
.client
) {
1350 if (! check_port_perm(sport
, PERM_RD
))
1353 /* check write permission */
1354 if (client
->number
!= subs
->dest
.client
) {
1355 if (! check_port_perm(dport
, PERM_WR
))
1362 * send an subscription notify event to user client:
1363 * client must be user client.
1365 int snd_seq_client_notify_subscription(int client
, int port
,
1366 snd_seq_port_subscribe_t
*info
, int evtype
)
1368 snd_seq_event_t event
;
1370 memset(&event
, 0, sizeof(event
));
1371 event
.type
= evtype
;
1372 event
.data
.connect
.dest
= info
->dest
;
1373 event
.data
.connect
.sender
= info
->sender
;
1375 return snd_seq_system_notify(client
, port
, &event
); /* non-atomic */
1380 * add to port's subscription list IOCTL interface
1382 static int snd_seq_ioctl_subscribe_port(client_t
* client
, void __user
*arg
)
1384 int result
= -EINVAL
;
1385 client_t
*receiver
= NULL
, *sender
= NULL
;
1386 client_port_t
*sport
= NULL
, *dport
= NULL
;
1387 snd_seq_port_subscribe_t subs
;
1389 if (copy_from_user(&subs
, arg
, sizeof(subs
)))
1392 if ((receiver
= snd_seq_client_use_ptr(subs
.dest
.client
)) == NULL
)
1394 if ((sender
= snd_seq_client_use_ptr(subs
.sender
.client
)) == NULL
)
1396 if ((sport
= snd_seq_port_use_ptr(sender
, subs
.sender
.port
)) == NULL
)
1398 if ((dport
= snd_seq_port_use_ptr(receiver
, subs
.dest
.port
)) == NULL
)
1401 result
= check_subscription_permission(client
, sport
, dport
, &subs
);
1406 result
= snd_seq_port_connect(client
, sender
, sport
, receiver
, dport
, &subs
);
1407 if (! result
) /* broadcast announce */
1408 snd_seq_client_notify_subscription(SNDRV_SEQ_ADDRESS_SUBSCRIBERS
, 0,
1409 &subs
, SNDRV_SEQ_EVENT_PORT_SUBSCRIBED
);
1412 snd_seq_port_unlock(sport
);
1414 snd_seq_port_unlock(dport
);
1416 snd_seq_client_unlock(sender
);
1418 snd_seq_client_unlock(receiver
);
1424 * remove from port's subscription list
1426 static int snd_seq_ioctl_unsubscribe_port(client_t
* client
, void __user
*arg
)
1428 int result
= -ENXIO
;
1429 client_t
*receiver
= NULL
, *sender
= NULL
;
1430 client_port_t
*sport
= NULL
, *dport
= NULL
;
1431 snd_seq_port_subscribe_t subs
;
1433 if (copy_from_user(&subs
, arg
, sizeof(subs
)))
1436 if ((receiver
= snd_seq_client_use_ptr(subs
.dest
.client
)) == NULL
)
1438 if ((sender
= snd_seq_client_use_ptr(subs
.sender
.client
)) == NULL
)
1440 if ((sport
= snd_seq_port_use_ptr(sender
, subs
.sender
.port
)) == NULL
)
1442 if ((dport
= snd_seq_port_use_ptr(receiver
, subs
.dest
.port
)) == NULL
)
1445 result
= check_subscription_permission(client
, sport
, dport
, &subs
);
1449 result
= snd_seq_port_disconnect(client
, sender
, sport
, receiver
, dport
, &subs
);
1450 if (! result
) /* broadcast announce */
1451 snd_seq_client_notify_subscription(SNDRV_SEQ_ADDRESS_SUBSCRIBERS
, 0,
1452 &subs
, SNDRV_SEQ_EVENT_PORT_UNSUBSCRIBED
);
1455 snd_seq_port_unlock(sport
);
1457 snd_seq_port_unlock(dport
);
1459 snd_seq_client_unlock(sender
);
1461 snd_seq_client_unlock(receiver
);
1466 /* CREATE_QUEUE ioctl() */
1467 static int snd_seq_ioctl_create_queue(client_t
*client
, void __user
*arg
)
1469 snd_seq_queue_info_t info
;
1473 if (copy_from_user(&info
, arg
, sizeof(info
)))
1476 result
= snd_seq_queue_alloc(client
->number
, info
.locked
, info
.flags
);
1480 q
= queueptr(result
);
1484 info
.queue
= q
->queue
;
1485 info
.locked
= q
->locked
;
1486 info
.owner
= q
->owner
;
1488 /* set queue name */
1490 snprintf(info
.name
, sizeof(info
.name
), "Queue-%d", q
->queue
);
1491 strlcpy(q
->name
, info
.name
, sizeof(q
->name
));
1494 if (copy_to_user(arg
, &info
, sizeof(info
)))
1500 /* DELETE_QUEUE ioctl() */
1501 static int snd_seq_ioctl_delete_queue(client_t
*client
, void __user
*arg
)
1503 snd_seq_queue_info_t info
;
1505 if (copy_from_user(&info
, arg
, sizeof(info
)))
1508 return snd_seq_queue_delete(client
->number
, info
.queue
);
1511 /* GET_QUEUE_INFO ioctl() */
1512 static int snd_seq_ioctl_get_queue_info(client_t
*client
, void __user
*arg
)
1514 snd_seq_queue_info_t info
;
1517 if (copy_from_user(&info
, arg
, sizeof(info
)))
1520 q
= queueptr(info
.queue
);
1524 memset(&info
, 0, sizeof(info
));
1525 info
.queue
= q
->queue
;
1526 info
.owner
= q
->owner
;
1527 info
.locked
= q
->locked
;
1528 strlcpy(info
.name
, q
->name
, sizeof(info
.name
));
1531 if (copy_to_user(arg
, &info
, sizeof(info
)))
1537 /* SET_QUEUE_INFO ioctl() */
1538 static int snd_seq_ioctl_set_queue_info(client_t
*client
, void __user
*arg
)
1540 snd_seq_queue_info_t info
;
1543 if (copy_from_user(&info
, arg
, sizeof(info
)))
1546 if (info
.owner
!= client
->number
)
1549 /* change owner/locked permission */
1550 if (snd_seq_queue_check_access(info
.queue
, client
->number
)) {
1551 if (snd_seq_queue_set_owner(info
.queue
, client
->number
, info
.locked
) < 0)
1554 snd_seq_queue_use(info
.queue
, client
->number
, 1);
1559 q
= queueptr(info
.queue
);
1562 if (q
->owner
!= client
->number
) {
1566 strlcpy(q
->name
, info
.name
, sizeof(q
->name
));
1572 /* GET_NAMED_QUEUE ioctl() */
1573 static int snd_seq_ioctl_get_named_queue(client_t
*client
, void __user
*arg
)
1575 snd_seq_queue_info_t info
;
1578 if (copy_from_user(&info
, arg
, sizeof(info
)))
1581 q
= snd_seq_queue_find_name(info
.name
);
1584 info
.queue
= q
->queue
;
1585 info
.owner
= q
->owner
;
1586 info
.locked
= q
->locked
;
1589 if (copy_to_user(arg
, &info
, sizeof(info
)))
1595 /* GET_QUEUE_STATUS ioctl() */
1596 static int snd_seq_ioctl_get_queue_status(client_t
* client
, void __user
*arg
)
1598 snd_seq_queue_status_t status
;
1602 if (copy_from_user(&status
, arg
, sizeof(status
)))
1605 queue
= queueptr(status
.queue
);
1608 memset(&status
, 0, sizeof(status
));
1609 status
.queue
= queue
->queue
;
1612 status
.events
= queue
->tickq
->cells
+ queue
->timeq
->cells
;
1614 status
.time
= snd_seq_timer_get_cur_time(tmr
);
1615 status
.tick
= snd_seq_timer_get_cur_tick(tmr
);
1617 status
.running
= tmr
->running
;
1619 status
.flags
= queue
->flags
;
1622 if (copy_to_user(arg
, &status
, sizeof(status
)))
1628 /* GET_QUEUE_TEMPO ioctl() */
1629 static int snd_seq_ioctl_get_queue_tempo(client_t
* client
, void __user
*arg
)
1631 snd_seq_queue_tempo_t tempo
;
1635 if (copy_from_user(&tempo
, arg
, sizeof(tempo
)))
1638 queue
= queueptr(tempo
.queue
);
1641 memset(&tempo
, 0, sizeof(tempo
));
1642 tempo
.queue
= queue
->queue
;
1646 tempo
.tempo
= tmr
->tempo
;
1647 tempo
.ppq
= tmr
->ppq
;
1648 tempo
.skew_value
= tmr
->skew
;
1649 tempo
.skew_base
= tmr
->skew_base
;
1652 if (copy_to_user(arg
, &tempo
, sizeof(tempo
)))
1658 /* SET_QUEUE_TEMPO ioctl() */
1659 int snd_seq_set_queue_tempo(int client
, snd_seq_queue_tempo_t
*tempo
)
1661 if (!snd_seq_queue_check_access(tempo
->queue
, client
))
1663 return snd_seq_queue_timer_set_tempo(tempo
->queue
, client
, tempo
);
1666 static int snd_seq_ioctl_set_queue_tempo(client_t
* client
, void __user
*arg
)
1669 snd_seq_queue_tempo_t tempo
;
1671 if (copy_from_user(&tempo
, arg
, sizeof(tempo
)))
1674 result
= snd_seq_set_queue_tempo(client
->number
, &tempo
);
1675 return result
< 0 ? result
: 0;
1679 /* GET_QUEUE_TIMER ioctl() */
1680 static int snd_seq_ioctl_get_queue_timer(client_t
* client
, void __user
*arg
)
1682 snd_seq_queue_timer_t timer
;
1686 if (copy_from_user(&timer
, arg
, sizeof(timer
)))
1689 queue
= queueptr(timer
.queue
);
1693 if (down_interruptible(&queue
->timer_mutex
)) {
1695 return -ERESTARTSYS
;
1698 memset(&timer
, 0, sizeof(timer
));
1699 timer
.queue
= queue
->queue
;
1701 timer
.type
= tmr
->type
;
1702 if (tmr
->type
== SNDRV_SEQ_TIMER_ALSA
) {
1703 timer
.u
.alsa
.id
= tmr
->alsa_id
;
1704 timer
.u
.alsa
.resolution
= tmr
->preferred_resolution
;
1706 up(&queue
->timer_mutex
);
1709 if (copy_to_user(arg
, &timer
, sizeof(timer
)))
1715 /* SET_QUEUE_TIMER ioctl() */
1716 static int snd_seq_ioctl_set_queue_timer(client_t
* client
, void __user
*arg
)
1719 snd_seq_queue_timer_t timer
;
1721 if (copy_from_user(&timer
, arg
, sizeof(timer
)))
1724 if (timer
.type
!= SNDRV_SEQ_TIMER_ALSA
)
1727 if (snd_seq_queue_check_access(timer
.queue
, client
->number
)) {
1731 q
= queueptr(timer
.queue
);
1734 if (down_interruptible(&q
->timer_mutex
)) {
1736 return -ERESTARTSYS
;
1739 snd_seq_queue_timer_close(timer
.queue
);
1740 tmr
->type
= timer
.type
;
1741 if (tmr
->type
== SNDRV_SEQ_TIMER_ALSA
) {
1742 tmr
->alsa_id
= timer
.u
.alsa
.id
;
1743 tmr
->preferred_resolution
= timer
.u
.alsa
.resolution
;
1745 result
= snd_seq_queue_timer_open(timer
.queue
);
1746 up(&q
->timer_mutex
);
1756 /* GET_QUEUE_CLIENT ioctl() */
1757 static int snd_seq_ioctl_get_queue_client(client_t
* client
, void __user
*arg
)
1759 snd_seq_queue_client_t info
;
1762 if (copy_from_user(&info
, arg
, sizeof(info
)))
1765 used
= snd_seq_queue_is_used(info
.queue
, client
->number
);
1769 info
.client
= client
->number
;
1771 if (copy_to_user(arg
, &info
, sizeof(info
)))
1777 /* SET_QUEUE_CLIENT ioctl() */
1778 static int snd_seq_ioctl_set_queue_client(client_t
* client
, void __user
*arg
)
1781 snd_seq_queue_client_t info
;
1783 if (copy_from_user(&info
, arg
, sizeof(info
)))
1786 if (info
.used
>= 0) {
1787 err
= snd_seq_queue_use(info
.queue
, client
->number
, info
.used
);
1792 return snd_seq_ioctl_get_queue_client(client
, arg
);
1796 /* GET_CLIENT_POOL ioctl() */
1797 static int snd_seq_ioctl_get_client_pool(client_t
* client
, void __user
*arg
)
1799 snd_seq_client_pool_t info
;
1802 if (copy_from_user(&info
, arg
, sizeof(info
)))
1805 cptr
= snd_seq_client_use_ptr(info
.client
);
1808 memset(&info
, 0, sizeof(info
));
1809 info
.output_pool
= cptr
->pool
->size
;
1810 info
.output_room
= cptr
->pool
->room
;
1811 info
.output_free
= info
.output_pool
;
1813 info
.output_free
= snd_seq_unused_cells(cptr
->pool
);
1814 if (cptr
->type
== USER_CLIENT
) {
1815 info
.input_pool
= cptr
->data
.user
.fifo_pool_size
;
1816 info
.input_free
= info
.input_pool
;
1817 if (cptr
->data
.user
.fifo
)
1818 info
.input_free
= snd_seq_unused_cells(cptr
->data
.user
.fifo
->pool
);
1820 info
.input_pool
= 0;
1821 info
.input_free
= 0;
1823 snd_seq_client_unlock(cptr
);
1825 if (copy_to_user(arg
, &info
, sizeof(info
)))
1830 /* SET_CLIENT_POOL ioctl() */
1831 static int snd_seq_ioctl_set_client_pool(client_t
* client
, void __user
*arg
)
1833 snd_seq_client_pool_t info
;
1836 if (copy_from_user(&info
, arg
, sizeof(info
)))
1839 if (client
->number
!= info
.client
)
1840 return -EINVAL
; /* can't change other clients */
1842 if (info
.output_pool
>= 1 && info
.output_pool
<= SNDRV_SEQ_MAX_EVENTS
&&
1843 (! snd_seq_write_pool_allocated(client
) ||
1844 info
.output_pool
!= client
->pool
->size
)) {
1845 if (snd_seq_write_pool_allocated(client
)) {
1846 /* remove all existing cells */
1847 snd_seq_queue_client_leave_cells(client
->number
);
1848 snd_seq_pool_done(client
->pool
);
1850 client
->pool
->size
= info
.output_pool
;
1851 rc
= snd_seq_pool_init(client
->pool
);
1855 if (client
->type
== USER_CLIENT
&& client
->data
.user
.fifo
!= NULL
&&
1856 info
.input_pool
>= 1 &&
1857 info
.input_pool
<= SNDRV_SEQ_MAX_CLIENT_EVENTS
&&
1858 info
.input_pool
!= client
->data
.user
.fifo_pool_size
) {
1859 /* change pool size */
1860 rc
= snd_seq_fifo_resize(client
->data
.user
.fifo
, info
.input_pool
);
1863 client
->data
.user
.fifo_pool_size
= info
.input_pool
;
1865 if (info
.output_room
>= 1 &&
1866 info
.output_room
<= client
->pool
->size
) {
1867 client
->pool
->room
= info
.output_room
;
1870 return snd_seq_ioctl_get_client_pool(client
, arg
);
1874 /* REMOVE_EVENTS ioctl() */
1875 static int snd_seq_ioctl_remove_events(client_t
* client
, void __user
*arg
)
1877 snd_seq_remove_events_t info
;
1879 if (copy_from_user(&info
, arg
, sizeof(info
)))
1883 * Input mostly not implemented XXX.
1885 if (info
.remove_mode
& SNDRV_SEQ_REMOVE_INPUT
) {
1887 * No restrictions so for a user client we can clear
1890 if (client
->type
== USER_CLIENT
)
1891 snd_seq_fifo_clear(client
->data
.user
.fifo
);
1894 if (info
.remove_mode
& SNDRV_SEQ_REMOVE_OUTPUT
)
1895 snd_seq_queue_remove_cells(client
->number
, &info
);
1902 * get subscription info
1904 static int snd_seq_ioctl_get_subscription(client_t
*client
, void __user
*arg
)
1907 client_t
*sender
= NULL
;
1908 client_port_t
*sport
= NULL
;
1909 snd_seq_port_subscribe_t subs
;
1912 if (copy_from_user(&subs
, arg
, sizeof(subs
)))
1916 if ((sender
= snd_seq_client_use_ptr(subs
.sender
.client
)) == NULL
)
1918 if ((sport
= snd_seq_port_use_ptr(sender
, subs
.sender
.port
)) == NULL
)
1920 p
= snd_seq_port_get_subscription(&sport
->c_src
, &subs
.dest
);
1929 snd_seq_port_unlock(sport
);
1931 snd_seq_client_unlock(sender
);
1933 if (copy_to_user(arg
, &subs
, sizeof(subs
)))
1941 * get subscription info - check only its presence
1943 static int snd_seq_ioctl_query_subs(client_t
*client
, void __user
*arg
)
1945 int result
= -ENXIO
;
1946 client_t
*cptr
= NULL
;
1947 client_port_t
*port
= NULL
;
1948 snd_seq_query_subs_t subs
;
1949 port_subs_info_t
*group
;
1950 struct list_head
*p
;
1953 if (copy_from_user(&subs
, arg
, sizeof(subs
)))
1956 if ((cptr
= snd_seq_client_use_ptr(subs
.root
.client
)) == NULL
)
1958 if ((port
= snd_seq_port_use_ptr(cptr
, subs
.root
.port
)) == NULL
)
1961 switch (subs
.type
) {
1962 case SNDRV_SEQ_QUERY_SUBS_READ
:
1963 group
= &port
->c_src
;
1965 case SNDRV_SEQ_QUERY_SUBS_WRITE
:
1966 group
= &port
->c_dest
;
1972 down_read(&group
->list_mutex
);
1973 /* search for the subscriber */
1974 subs
.num_subs
= group
->count
;
1977 list_for_each(p
, &group
->list_head
) {
1978 if (i
++ == subs
.index
) {
1981 if (subs
.type
== SNDRV_SEQ_QUERY_SUBS_READ
) {
1982 s
= list_entry(p
, subscribers_t
, src_list
);
1983 subs
.addr
= s
->info
.dest
;
1985 s
= list_entry(p
, subscribers_t
, dest_list
);
1986 subs
.addr
= s
->info
.sender
;
1988 subs
.flags
= s
->info
.flags
;
1989 subs
.queue
= s
->info
.queue
;
1994 up_read(&group
->list_mutex
);
1998 snd_seq_port_unlock(port
);
2000 snd_seq_client_unlock(cptr
);
2002 if (copy_to_user(arg
, &subs
, sizeof(subs
)))
2012 static int snd_seq_ioctl_query_next_client(client_t
*client
, void __user
*arg
)
2014 client_t
*cptr
= NULL
;
2015 snd_seq_client_info_t info
;
2017 if (copy_from_user(&info
, arg
, sizeof(info
)))
2020 /* search for next client */
2022 if (info
.client
< 0)
2024 for (; info
.client
< SNDRV_SEQ_MAX_CLIENTS
; info
.client
++) {
2025 cptr
= snd_seq_client_use_ptr(info
.client
);
2032 get_client_info(cptr
, &info
);
2033 snd_seq_client_unlock(cptr
);
2035 if (copy_to_user(arg
, &info
, sizeof(info
)))
2043 static int snd_seq_ioctl_query_next_port(client_t
*client
, void __user
*arg
)
2046 client_port_t
*port
= NULL
;
2047 snd_seq_port_info_t info
;
2049 if (copy_from_user(&info
, arg
, sizeof(info
)))
2051 cptr
= snd_seq_client_use_ptr(info
.addr
.client
);
2055 /* search for next port */
2057 port
= snd_seq_port_query_nearest(cptr
, &info
);
2059 snd_seq_client_unlock(cptr
);
2064 info
.addr
= port
->addr
;
2065 snd_seq_get_port_info(port
, &info
);
2066 snd_seq_port_unlock(port
);
2067 snd_seq_client_unlock(cptr
);
2069 if (copy_to_user(arg
, &info
, sizeof(info
)))
2074 /* -------------------------------------------------------- */
2076 static struct seq_ioctl_table
{
2078 int (*func
)(client_t
*client
, void __user
* arg
);
2079 } ioctl_tables
[] = {
2080 { SNDRV_SEQ_IOCTL_SYSTEM_INFO
, snd_seq_ioctl_system_info
},
2081 { SNDRV_SEQ_IOCTL_RUNNING_MODE
, snd_seq_ioctl_running_mode
},
2082 { SNDRV_SEQ_IOCTL_GET_CLIENT_INFO
, snd_seq_ioctl_get_client_info
},
2083 { SNDRV_SEQ_IOCTL_SET_CLIENT_INFO
, snd_seq_ioctl_set_client_info
},
2084 { SNDRV_SEQ_IOCTL_CREATE_PORT
, snd_seq_ioctl_create_port
},
2085 { SNDRV_SEQ_IOCTL_DELETE_PORT
, snd_seq_ioctl_delete_port
},
2086 { SNDRV_SEQ_IOCTL_GET_PORT_INFO
, snd_seq_ioctl_get_port_info
},
2087 { SNDRV_SEQ_IOCTL_SET_PORT_INFO
, snd_seq_ioctl_set_port_info
},
2088 { SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT
, snd_seq_ioctl_subscribe_port
},
2089 { SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT
, snd_seq_ioctl_unsubscribe_port
},
2090 { SNDRV_SEQ_IOCTL_CREATE_QUEUE
, snd_seq_ioctl_create_queue
},
2091 { SNDRV_SEQ_IOCTL_DELETE_QUEUE
, snd_seq_ioctl_delete_queue
},
2092 { SNDRV_SEQ_IOCTL_GET_QUEUE_INFO
, snd_seq_ioctl_get_queue_info
},
2093 { SNDRV_SEQ_IOCTL_SET_QUEUE_INFO
, snd_seq_ioctl_set_queue_info
},
2094 { SNDRV_SEQ_IOCTL_GET_NAMED_QUEUE
, snd_seq_ioctl_get_named_queue
},
2095 { SNDRV_SEQ_IOCTL_GET_QUEUE_STATUS
, snd_seq_ioctl_get_queue_status
},
2096 { SNDRV_SEQ_IOCTL_GET_QUEUE_TEMPO
, snd_seq_ioctl_get_queue_tempo
},
2097 { SNDRV_SEQ_IOCTL_SET_QUEUE_TEMPO
, snd_seq_ioctl_set_queue_tempo
},
2098 { SNDRV_SEQ_IOCTL_GET_QUEUE_TIMER
, snd_seq_ioctl_get_queue_timer
},
2099 { SNDRV_SEQ_IOCTL_SET_QUEUE_TIMER
, snd_seq_ioctl_set_queue_timer
},
2100 { SNDRV_SEQ_IOCTL_GET_QUEUE_CLIENT
, snd_seq_ioctl_get_queue_client
},
2101 { SNDRV_SEQ_IOCTL_SET_QUEUE_CLIENT
, snd_seq_ioctl_set_queue_client
},
2102 { SNDRV_SEQ_IOCTL_GET_CLIENT_POOL
, snd_seq_ioctl_get_client_pool
},
2103 { SNDRV_SEQ_IOCTL_SET_CLIENT_POOL
, snd_seq_ioctl_set_client_pool
},
2104 { SNDRV_SEQ_IOCTL_GET_SUBSCRIPTION
, snd_seq_ioctl_get_subscription
},
2105 { SNDRV_SEQ_IOCTL_QUERY_NEXT_CLIENT
, snd_seq_ioctl_query_next_client
},
2106 { SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT
, snd_seq_ioctl_query_next_port
},
2107 { SNDRV_SEQ_IOCTL_REMOVE_EVENTS
, snd_seq_ioctl_remove_events
},
2108 { SNDRV_SEQ_IOCTL_QUERY_SUBS
, snd_seq_ioctl_query_subs
},
2112 static int snd_seq_do_ioctl(client_t
*client
, unsigned int cmd
, void __user
*arg
)
2114 struct seq_ioctl_table
*p
;
2117 case SNDRV_SEQ_IOCTL_PVERSION
:
2118 /* return sequencer version number */
2119 return put_user(SNDRV_SEQ_VERSION
, (int __user
*)arg
) ? -EFAULT
: 0;
2120 case SNDRV_SEQ_IOCTL_CLIENT_ID
:
2121 /* return the id of this client */
2122 return put_user(client
->number
, (int __user
*)arg
) ? -EFAULT
: 0;
2127 for (p
= ioctl_tables
; p
->cmd
; p
++) {
2129 return p
->func(client
, arg
);
2131 snd_printd("seq unknown ioctl() 0x%x (type='%c', number=0x%2x)\n",
2132 cmd
, _IOC_TYPE(cmd
), _IOC_NR(cmd
));
2137 static long snd_seq_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
2139 client_t
*client
= (client_t
*) file
->private_data
;
2141 snd_assert(client
!= NULL
, return -ENXIO
);
2143 return snd_seq_do_ioctl(client
, cmd
, (void __user
*) arg
);
2146 #ifdef CONFIG_COMPAT
2147 #include "seq_compat.c"
2149 #define snd_seq_ioctl_compat NULL
2152 /* -------------------------------------------------------- */
2155 /* exported to kernel modules */
2156 int snd_seq_create_kernel_client(snd_card_t
*card
, int client_index
, snd_seq_client_callback_t
* callback
)
2160 snd_assert(! in_interrupt(), return -EBUSY
);
2162 if (callback
== NULL
)
2164 if (card
&& client_index
> 7)
2166 if (card
== NULL
&& client_index
> 63)
2169 client_index
+= 64 + (card
->number
<< 3);
2171 if (down_interruptible(®ister_mutex
))
2172 return -ERESTARTSYS
;
2173 /* empty write queue as default */
2174 client
= seq_create_client1(client_index
, 0);
2175 if (client
== NULL
) {
2176 up(®ister_mutex
);
2177 return -EBUSY
; /* failure code */
2179 usage_alloc(&client_usage
, 1);
2181 client
->accept_input
= callback
->allow_output
;
2182 client
->accept_output
= callback
->allow_input
;
2184 /* fill client data */
2185 client
->data
.kernel
.card
= card
;
2186 client
->data
.kernel
.private_data
= callback
->private_data
;
2187 sprintf(client
->name
, "Client-%d", client
->number
);
2189 client
->type
= KERNEL_CLIENT
;
2190 up(®ister_mutex
);
2192 /* make others aware this new client */
2193 snd_seq_system_client_ev_client_start(client
->number
);
2195 /* return client number to caller */
2196 return client
->number
;
2199 /* exported to kernel modules */
2200 int snd_seq_delete_kernel_client(int client
)
2204 snd_assert(! in_interrupt(), return -EBUSY
);
2206 ptr
= clientptr(client
);
2210 seq_free_client(ptr
);
2216 /* skeleton to enqueue event, called from snd_seq_kernel_client_enqueue
2217 * and snd_seq_kernel_client_enqueue_blocking
2219 static int kernel_client_enqueue(int client
, snd_seq_event_t
*ev
,
2220 struct file
*file
, int blocking
,
2221 int atomic
, int hop
)
2226 snd_assert(ev
!= NULL
, return -EINVAL
);
2228 if (ev
->type
== SNDRV_SEQ_EVENT_NONE
)
2229 return 0; /* ignore this */
2230 if (ev
->type
== SNDRV_SEQ_EVENT_KERNEL_ERROR
)
2231 return -EINVAL
; /* quoted events can't be enqueued */
2233 /* fill in client number */
2234 ev
->source
.client
= client
;
2236 if (check_event_type_and_length(ev
))
2239 cptr
= snd_seq_client_use_ptr(client
);
2243 if (! cptr
->accept_output
)
2246 result
= snd_seq_client_enqueue_event(cptr
, ev
, file
, blocking
, atomic
, hop
);
2248 snd_seq_client_unlock(cptr
);
2253 * exported, called by kernel clients to enqueue events (w/o blocking)
2255 * RETURN VALUE: zero if succeed, negative if error
2257 int snd_seq_kernel_client_enqueue(int client
, snd_seq_event_t
* ev
,
2258 int atomic
, int hop
)
2260 return kernel_client_enqueue(client
, ev
, NULL
, 0, atomic
, hop
);
2264 * exported, called by kernel clients to enqueue events (with blocking)
2266 * RETURN VALUE: zero if succeed, negative if error
2268 int snd_seq_kernel_client_enqueue_blocking(int client
, snd_seq_event_t
* ev
,
2270 int atomic
, int hop
)
2272 return kernel_client_enqueue(client
, ev
, file
, 1, atomic
, hop
);
2277 * exported, called by kernel clients to dispatch events directly to other
2278 * clients, bypassing the queues. Event time-stamp will be updated.
2280 * RETURN VALUE: negative = delivery failed,
2281 * zero, or positive: the number of delivered events
2283 int snd_seq_kernel_client_dispatch(int client
, snd_seq_event_t
* ev
,
2284 int atomic
, int hop
)
2289 snd_assert(ev
!= NULL
, return -EINVAL
);
2291 /* fill in client number */
2292 ev
->queue
= SNDRV_SEQ_QUEUE_DIRECT
;
2293 ev
->source
.client
= client
;
2295 if (check_event_type_and_length(ev
))
2298 cptr
= snd_seq_client_use_ptr(client
);
2302 if (!cptr
->accept_output
)
2305 result
= snd_seq_deliver_event(cptr
, ev
, atomic
, hop
);
2307 snd_seq_client_unlock(cptr
);
2313 * exported, called by kernel clients to perform same functions as with
2316 int snd_seq_kernel_client_ctl(int clientid
, unsigned int cmd
, void *arg
)
2322 client
= clientptr(clientid
);
2325 fs
= snd_enter_user();
2326 result
= snd_seq_do_ioctl(client
, cmd
, (void __user
*)arg
);
2332 /* exported (for OSS emulator) */
2333 int snd_seq_kernel_client_write_poll(int clientid
, struct file
*file
, poll_table
*wait
)
2337 client
= clientptr(clientid
);
2341 if (! snd_seq_write_pool_allocated(client
))
2343 if (snd_seq_pool_poll_wait(client
->pool
, file
, wait
))
2348 /*---------------------------------------------------------------------------*/
2353 static void snd_seq_info_dump_subscribers(snd_info_buffer_t
*buffer
, port_subs_info_t
*group
, int is_src
, char *msg
)
2355 struct list_head
*p
;
2359 down_read(&group
->list_mutex
);
2360 if (list_empty(&group
->list_head
)) {
2361 up_read(&group
->list_mutex
);
2364 snd_iprintf(buffer
, msg
);
2365 list_for_each(p
, &group
->list_head
) {
2367 s
= list_entry(p
, subscribers_t
, src_list
);
2369 s
= list_entry(p
, subscribers_t
, dest_list
);
2371 snd_iprintf(buffer
, ", ");
2372 snd_iprintf(buffer
, "%d:%d",
2373 is_src
? s
->info
.dest
.client
: s
->info
.sender
.client
,
2374 is_src
? s
->info
.dest
.port
: s
->info
.sender
.port
);
2375 if (s
->info
.flags
& SNDRV_SEQ_PORT_SUBS_TIMESTAMP
)
2376 snd_iprintf(buffer
, "[%c:%d]", ((s
->info
.flags
& SNDRV_SEQ_PORT_SUBS_TIME_REAL
) ? 'r' : 't'), s
->info
.queue
);
2377 if (group
->exclusive
)
2378 snd_iprintf(buffer
, "[ex]");
2380 up_read(&group
->list_mutex
);
2381 snd_iprintf(buffer
, "\n");
2384 #define FLAG_PERM_RD(perm) ((perm) & SNDRV_SEQ_PORT_CAP_READ ? ((perm) & SNDRV_SEQ_PORT_CAP_SUBS_READ ? 'R' : 'r') : '-')
2385 #define FLAG_PERM_WR(perm) ((perm) & SNDRV_SEQ_PORT_CAP_WRITE ? ((perm) & SNDRV_SEQ_PORT_CAP_SUBS_WRITE ? 'W' : 'w') : '-')
2386 #define FLAG_PERM_EX(perm) ((perm) & SNDRV_SEQ_PORT_CAP_NO_EXPORT ? '-' : 'e')
2388 #define FLAG_PERM_DUPLEX(perm) ((perm) & SNDRV_SEQ_PORT_CAP_DUPLEX ? 'X' : '-')
2390 static void snd_seq_info_dump_ports(snd_info_buffer_t
*buffer
, client_t
*client
)
2392 struct list_head
*l
;
2394 down(&client
->ports_mutex
);
2395 list_for_each(l
, &client
->ports_list_head
) {
2396 client_port_t
*p
= list_entry(l
, client_port_t
, list
);
2397 snd_iprintf(buffer
, " Port %3d : \"%s\" (%c%c%c%c)\n",
2398 p
->addr
.port
, p
->name
,
2399 FLAG_PERM_RD(p
->capability
),
2400 FLAG_PERM_WR(p
->capability
),
2401 FLAG_PERM_EX(p
->capability
),
2402 FLAG_PERM_DUPLEX(p
->capability
));
2403 snd_seq_info_dump_subscribers(buffer
, &p
->c_src
, 1, " Connecting To: ");
2404 snd_seq_info_dump_subscribers(buffer
, &p
->c_dest
, 0, " Connected From: ");
2406 up(&client
->ports_mutex
);
2410 /* exported to seq_info.c */
2411 void snd_seq_info_clients_read(snd_info_entry_t
*entry
,
2412 snd_info_buffer_t
* buffer
)
2414 extern void snd_seq_info_pool(snd_info_buffer_t
* buffer
, pool_t
* pool
, char *space
);
2418 snd_iprintf(buffer
, "Client info\n");
2419 snd_iprintf(buffer
, " cur clients : %d\n", client_usage
.cur
);
2420 snd_iprintf(buffer
, " peak clients : %d\n", client_usage
.peak
);
2421 snd_iprintf(buffer
, " max clients : %d\n", SNDRV_SEQ_MAX_CLIENTS
);
2422 snd_iprintf(buffer
, "\n");
2424 /* list the client table */
2425 for (c
= 0; c
< SNDRV_SEQ_MAX_CLIENTS
; c
++) {
2426 client
= snd_seq_client_use_ptr(c
);
2429 if (client
->type
== NO_CLIENT
) {
2430 snd_seq_client_unlock(client
);
2434 snd_iprintf(buffer
, "Client %3d : \"%s\" [%s]\n",
2436 client
->type
== USER_CLIENT
? "User" : "Kernel");
2437 snd_seq_info_dump_ports(buffer
, client
);
2438 if (snd_seq_write_pool_allocated(client
)) {
2439 snd_iprintf(buffer
, " Output pool :\n");
2440 snd_seq_info_pool(buffer
, client
->pool
, " ");
2442 if (client
->type
== USER_CLIENT
&& client
->data
.user
.fifo
&&
2443 client
->data
.user
.fifo
->pool
) {
2444 snd_iprintf(buffer
, " Input pool :\n");
2445 snd_seq_info_pool(buffer
, client
->data
.user
.fifo
->pool
, " ");
2447 snd_seq_client_unlock(client
);
2452 /*---------------------------------------------------------------------------*/
2459 static struct file_operations snd_seq_f_ops
=
2461 .owner
= THIS_MODULE
,
2462 .read
= snd_seq_read
,
2463 .write
= snd_seq_write
,
2464 .open
= snd_seq_open
,
2465 .release
= snd_seq_release
,
2466 .poll
= snd_seq_poll
,
2467 .unlocked_ioctl
= snd_seq_ioctl
,
2468 .compat_ioctl
= snd_seq_ioctl_compat
,
2471 static snd_minor_t snd_seq_reg
=
2473 .comment
= "sequencer",
2474 .f_ops
= &snd_seq_f_ops
,
2479 * register sequencer device
2481 int __init
snd_sequencer_device_init(void)
2485 if (down_interruptible(®ister_mutex
))
2486 return -ERESTARTSYS
;
2488 if ((err
= snd_register_device(SNDRV_DEVICE_TYPE_SEQUENCER
, NULL
, 0, &snd_seq_reg
, "seq")) < 0) {
2489 up(®ister_mutex
);
2493 up(®ister_mutex
);
2501 * unregister sequencer device
2503 void __exit
snd_sequencer_device_done(void)
2505 snd_unregister_device(SNDRV_DEVICE_TYPE_SEQUENCER
, NULL
, 0);