Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * ALSA sequencer Client Manager
4 * Copyright (c) 1998-1999 by Frank van de Pol <fvdpol@coil.demon.nl>
5 */
6#ifndef __SND_SEQ_CLIENTMGR_H
7#define __SND_SEQ_CLIENTMGR_H
8
9#include <sound/seq_kernel.h>
10#include <linux/bitops.h>
11#include "seq_fifo.h"
12#include "seq_ports.h"
13#include "seq_lock.h"
14
15/* client manager */
16
17struct snd_seq_user_client {
18 struct file *file; /* file struct of client */
19 /* ... */
20 struct pid *owner;
21
22 /* fifo */
23 struct snd_seq_fifo *fifo; /* queue for incoming events */
24 int fifo_pool_size;
25};
26
27struct snd_seq_kernel_client {
28 /* ... */
29 struct snd_card *card;
30};
31
32
33struct snd_seq_client {
34 snd_seq_client_type_t type;
35 unsigned int accept_input: 1,
36 accept_output: 1;
37 unsigned int midi_version;
38 unsigned int user_pversion;
39 char name[64]; /* client name */
40 int number; /* client number */
41 unsigned int filter; /* filter flags */
42 DECLARE_BITMAP(event_filter, 256);
43 unsigned short group_filter;
44 snd_use_lock_t use_lock;
45 int event_lost;
46 /* ports */
47 int num_ports; /* number of ports */
48 struct list_head ports_list_head;
49 rwlock_t ports_lock;
50 struct mutex ports_mutex;
51 struct mutex ioctl_mutex;
52 int convert32; /* convert 32->64bit */
53 int ump_endpoint_port;
54
55 /* output pool */
56 struct snd_seq_pool *pool; /* memory pool for this client */
57
58 union {
59 struct snd_seq_user_client user;
60 struct snd_seq_kernel_client kernel;
61 } data;
62
63 /* for UMP */
64 void **ump_info;
65};
66
67/* usage statistics */
68struct snd_seq_usage {
69 int cur;
70 int peak;
71};
72
73
74int client_init_data(void);
75int snd_sequencer_device_init(void);
76void snd_sequencer_device_done(void);
77
78/* get locked pointer to client */
79struct snd_seq_client *snd_seq_client_use_ptr(int clientid);
80
81static inline struct snd_seq_client *
82snd_seq_client_ref(struct snd_seq_client *client)
83{
84 snd_use_lock_use(&client->use_lock);
85 return client;
86}
87
88/* unlock pointer to client */
89static inline void snd_seq_client_unref(struct snd_seq_client *client)
90{
91 snd_use_lock_free(&client->use_lock);
92}
93
94DEFINE_FREE(snd_seq_client, struct snd_seq_client *, if (!IS_ERR_OR_NULL(_T)) snd_seq_client_unref(_T))
95
96/* dispatch event to client(s) */
97int snd_seq_dispatch_event(struct snd_seq_event_cell *cell, int atomic, int hop);
98
99int snd_seq_kernel_client_write_poll(int clientid, struct file *file, poll_table *wait);
100int snd_seq_client_notify_subscription(int client, int port,
101 struct snd_seq_port_subscribe *info, int evtype);
102
103int __snd_seq_deliver_single_event(struct snd_seq_client *dest,
104 struct snd_seq_client_port *dest_port,
105 struct snd_seq_event *event,
106 int atomic, int hop);
107
108/* only for OSS sequencer */
109int snd_seq_kernel_client_ioctl(int clientid, unsigned int cmd, void *arg);
110
111extern int seq_client_load[15];
112
113/* for internal use between kernel sequencer clients */
114struct snd_seq_client *snd_seq_kernel_client_get(int client);
115void snd_seq_kernel_client_put(struct snd_seq_client *cptr);
116
117static inline bool snd_seq_client_is_ump(struct snd_seq_client *c)
118{
119 return c->midi_version != SNDRV_SEQ_CLIENT_LEGACY_MIDI;
120}
121
122static inline bool snd_seq_client_is_midi2(struct snd_seq_client *c)
123{
124 return c->midi_version == SNDRV_SEQ_CLIENT_UMP_MIDI_2_0;
125}
126
127#endif