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1/* SPDX-License-Identifier: GPL-2.0-or-later */2/*3 * ALSA sequencer Client Manager4 * Copyright (c) 1998-1999 by Frank van de Pol <fvdpol@coil.demon.nl>5 */6#ifndef __SND_SEQ_CLIENTMGR_H7#define __SND_SEQ_CLIENTMGR_H8 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 81/* unlock pointer to client */82#define snd_seq_client_unlock(client) snd_use_lock_free(&(client)->use_lock)83 84/* dispatch event to client(s) */85int snd_seq_dispatch_event(struct snd_seq_event_cell *cell, int atomic, int hop);86 87int snd_seq_kernel_client_write_poll(int clientid, struct file *file, poll_table *wait);88int snd_seq_client_notify_subscription(int client, int port,89 struct snd_seq_port_subscribe *info, int evtype);90 91int __snd_seq_deliver_single_event(struct snd_seq_client *dest,92 struct snd_seq_client_port *dest_port,93 struct snd_seq_event *event,94 int atomic, int hop);95 96/* only for OSS sequencer */97bool snd_seq_client_ioctl_lock(int clientid);98void snd_seq_client_ioctl_unlock(int clientid);99 100extern int seq_client_load[15];101 102/* for internal use between kernel sequencer clients */103struct snd_seq_client *snd_seq_kernel_client_get(int client);104void snd_seq_kernel_client_put(struct snd_seq_client *cptr);105 106static inline bool snd_seq_client_is_ump(struct snd_seq_client *c)107{108 return c->midi_version != SNDRV_SEQ_CLIENT_LEGACY_MIDI;109}110 111static inline bool snd_seq_client_is_midi2(struct snd_seq_client *c)112{113 return c->midi_version == SNDRV_SEQ_CLIENT_UMP_MIDI_2_0;114}115 116#endif117