1 | /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */ |
2 | /* |
3 | * Copyright (c) 2014 Raspberry Pi (Trading) Ltd. All rights reserved. |
4 | * Copyright (c) 2010-2012 Broadcom. All rights reserved. |
5 | */ |
6 | |
7 | #ifndef VCHIQ_ARM_H |
8 | #define VCHIQ_ARM_H |
9 | |
10 | #include <linux/mutex.h> |
11 | #include <linux/platform_device.h> |
12 | #include <linux/semaphore.h> |
13 | #include <linux/atomic.h> |
14 | #include "vchiq_core.h" |
15 | #include "vchiq_debugfs.h" |
16 | |
17 | /* Some per-instance constants */ |
18 | #define MAX_COMPLETIONS 128 |
19 | #define MAX_SERVICES 64 |
20 | #define MAX_ELEMENTS 8 |
21 | #define MSG_QUEUE_SIZE 128 |
22 | |
23 | enum USE_TYPE_E { |
24 | USE_TYPE_SERVICE, |
25 | USE_TYPE_VCHIQ |
26 | }; |
27 | |
28 | struct user_service { |
29 | struct vchiq_service *service; |
30 | void __user *userdata; |
31 | struct vchiq_instance *instance; |
32 | char is_vchi; |
33 | char dequeue_pending; |
34 | char close_pending; |
35 | int message_available_pos; |
36 | int msg_insert; |
37 | int msg_remove; |
38 | struct completion insert_event; |
39 | struct completion remove_event; |
40 | struct completion close_event; |
41 | struct vchiq_header *msg_queue[MSG_QUEUE_SIZE]; |
42 | }; |
43 | |
44 | struct bulk_waiter_node { |
45 | struct bulk_waiter bulk_waiter; |
46 | int pid; |
47 | struct list_head list; |
48 | }; |
49 | |
50 | struct vchiq_instance { |
51 | struct vchiq_state *state; |
52 | struct vchiq_completion_data_kernel completions[MAX_COMPLETIONS]; |
53 | int completion_insert; |
54 | int completion_remove; |
55 | struct completion insert_event; |
56 | struct completion remove_event; |
57 | struct mutex completion_mutex; |
58 | |
59 | int connected; |
60 | int closing; |
61 | int pid; |
62 | int mark; |
63 | int use_close_delivered; |
64 | int trace; |
65 | |
66 | struct list_head bulk_waiter_list; |
67 | struct mutex bulk_waiter_list_mutex; |
68 | |
69 | struct vchiq_debugfs_node debugfs_node; |
70 | }; |
71 | |
72 | extern spinlock_t msg_queue_spinlock; |
73 | extern struct vchiq_state g_state; |
74 | |
75 | extern struct vchiq_state * |
76 | vchiq_get_state(void); |
77 | |
78 | int |
79 | vchiq_use_service(struct vchiq_instance *instance, unsigned int handle); |
80 | |
81 | extern int |
82 | vchiq_release_service(struct vchiq_instance *instance, unsigned int handle); |
83 | |
84 | extern int |
85 | vchiq_check_service(struct vchiq_service *service); |
86 | |
87 | extern void |
88 | vchiq_dump_platform_use_state(struct vchiq_state *state); |
89 | |
90 | extern void |
91 | vchiq_dump_service_use_state(struct vchiq_state *state); |
92 | |
93 | extern int |
94 | vchiq_use_internal(struct vchiq_state *state, struct vchiq_service *service, |
95 | enum USE_TYPE_E use_type); |
96 | extern int |
97 | vchiq_release_internal(struct vchiq_state *state, |
98 | struct vchiq_service *service); |
99 | |
100 | extern struct vchiq_debugfs_node * |
101 | vchiq_instance_get_debugfs_node(struct vchiq_instance *instance); |
102 | |
103 | extern int |
104 | vchiq_instance_get_use_count(struct vchiq_instance *instance); |
105 | |
106 | extern int |
107 | vchiq_instance_get_pid(struct vchiq_instance *instance); |
108 | |
109 | extern int |
110 | vchiq_instance_get_trace(struct vchiq_instance *instance); |
111 | |
112 | extern void |
113 | vchiq_instance_set_trace(struct vchiq_instance *instance, int trace); |
114 | |
115 | #if IS_ENABLED(CONFIG_VCHIQ_CDEV) |
116 | |
117 | extern void |
118 | vchiq_deregister_chrdev(void); |
119 | |
120 | extern int |
121 | vchiq_register_chrdev(struct device *parent); |
122 | |
123 | #else |
124 | |
125 | static inline void vchiq_deregister_chrdev(void) { } |
126 | static inline int vchiq_register_chrdev(struct device *parent) { return 0; } |
127 | |
128 | #endif /* IS_ENABLED(CONFIG_VCHIQ_CDEV) */ |
129 | |
130 | extern int |
131 | service_callback(struct vchiq_instance *vchiq_instance, enum vchiq_reason reason, |
132 | struct vchiq_header *, unsigned int handle, void *bulk_userdata); |
133 | |
134 | extern void |
135 | free_bulk_waiter(struct vchiq_instance *instance); |
136 | |
137 | #endif /* VCHIQ_ARM_H */ |
138 | |