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 17 #define SND_SEQ_GROUP_FILTER_MASK GENMASK(SNDRV_UMP_MAX_GROUPS, 0) 18 #define SND_SEQ_GROUP_FILTER_GROUPS GENMASK(SNDRV_UMP_MAX_GROUPS, 1) 19 20 struct snd_seq_user_client { 21 struct file *file; /* file struct of client */ 22 /* ... */ 23 struct pid *owner; 24 25 /* fifo */ 26 struct snd_seq_fifo *fifo; /* queue for incoming events */ 27 int fifo_pool_size; 28 }; 29 30 struct snd_seq_kernel_client { 31 /* ... */ 32 struct snd_card *card; 33 }; 34 35 36 struct snd_seq_client { 37 snd_seq_client_type_t type; 38 unsigned int accept_input: 1, 39 accept_output: 1; 40 unsigned int midi_version; 41 unsigned int user_pversion; 42 char name[64]; /* client name */ 43 int number; /* client number */ 44 unsigned int filter; /* filter flags */ 45 DECLARE_BITMAP(event_filter, 256); 46 unsigned int group_filter; 47 snd_use_lock_t use_lock; 48 int event_lost; 49 /* ports */ 50 int num_ports; /* number of ports */ 51 struct list_head ports_list_head; 52 struct mutex ports_mutex; 53 struct mutex ioctl_mutex; 54 int convert32; /* convert 32->64bit */ 55 int ump_endpoint_port; 56 57 /* output pool */ 58 struct snd_seq_pool *pool; /* memory pool for this client */ 59 60 union { 61 struct snd_seq_user_client user; 62 struct snd_seq_kernel_client kernel; 63 } data; 64 65 /* for UMP */ 66 void **ump_info; 67 }; 68 69 /* usage statistics */ 70 struct snd_seq_usage { 71 int cur; 72 int peak; 73 }; 74 75 76 int client_init_data(void); 77 int snd_sequencer_device_init(void); 78 void snd_sequencer_device_done(void); 79 80 /* get locked pointer to client */ 81 struct snd_seq_client *snd_seq_client_use_ptr(int clientid); 82 83 static inline struct snd_seq_client * 84 snd_seq_client_ref(struct snd_seq_client *client) 85 { 86 snd_use_lock_use(&client->use_lock); 87 return client; 88 } 89 90 /* unlock pointer to client */ 91 static inline void snd_seq_client_unref(struct snd_seq_client *client) 92 { 93 snd_use_lock_free(&client->use_lock); 94 } 95 96 DEFINE_FREE(snd_seq_client, struct snd_seq_client *, if (!IS_ERR_OR_NULL(_T)) snd_seq_client_unref(_T)) 97 98 /* dispatch event to client(s) */ 99 int snd_seq_dispatch_event(struct snd_seq_event_cell *cell, int atomic, int hop); 100 101 int snd_seq_kernel_client_write_poll(int clientid, struct file *file, poll_table *wait); 102 int snd_seq_client_notify_subscription(int client, int port, 103 struct snd_seq_port_subscribe *info, int evtype); 104 105 int __snd_seq_deliver_single_event(struct snd_seq_client *dest, 106 struct snd_seq_client_port *dest_port, 107 struct snd_seq_event *event, 108 int atomic, int hop); 109 110 /* only for OSS sequencer */ 111 int snd_seq_kernel_client_ioctl(int clientid, unsigned int cmd, void *arg); 112 113 extern int seq_client_load[15]; 114 115 /* for internal use between kernel sequencer clients */ 116 struct snd_seq_client *snd_seq_kernel_client_get(int client); 117 void snd_seq_kernel_client_put(struct snd_seq_client *cptr); 118 119 static inline bool snd_seq_client_is_ump(struct snd_seq_client *c) 120 { 121 return c->midi_version != SNDRV_SEQ_CLIENT_LEGACY_MIDI; 122 } 123 124 static inline bool snd_seq_client_is_midi2(struct snd_seq_client *c) 125 { 126 return c->midi_version == SNDRV_SEQ_CLIENT_UMP_MIDI_2_0; 127 } 128 129 #endif 130