1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
2 | /* |
3 | * Xen Event Channels (internal header) |
4 | * |
5 | * Copyright (C) 2013 Citrix Systems R&D Ltd. |
6 | */ |
7 | #ifndef __EVENTS_INTERNAL_H__ |
8 | #define __EVENTS_INTERNAL_H__ |
9 | |
10 | struct evtchn_loop_ctrl; |
11 | |
12 | struct evtchn_ops { |
13 | unsigned (*max_channels)(void); |
14 | unsigned (*nr_channels)(void); |
15 | |
16 | int (*setup)(evtchn_port_t port); |
17 | void (*remove)(evtchn_port_t port, unsigned int cpu); |
18 | void (*bind_to_cpu)(evtchn_port_t evtchn, unsigned int cpu, |
19 | unsigned int old_cpu); |
20 | |
21 | void (*clear_pending)(evtchn_port_t port); |
22 | void (*set_pending)(evtchn_port_t port); |
23 | bool (*is_pending)(evtchn_port_t port); |
24 | void (*mask)(evtchn_port_t port); |
25 | void (*unmask)(evtchn_port_t port); |
26 | |
27 | void (*handle_events)(unsigned cpu, struct evtchn_loop_ctrl *ctrl); |
28 | void (*resume)(void); |
29 | |
30 | int (*percpu_init)(unsigned int cpu); |
31 | int (*percpu_deinit)(unsigned int cpu); |
32 | }; |
33 | |
34 | extern const struct evtchn_ops *evtchn_ops; |
35 | |
36 | int get_evtchn_to_irq(evtchn_port_t evtchn); |
37 | void handle_irq_for_port(evtchn_port_t port, struct evtchn_loop_ctrl *ctrl); |
38 | |
39 | unsigned int cpu_from_evtchn(evtchn_port_t evtchn); |
40 | |
41 | static inline unsigned xen_evtchn_max_channels(void) |
42 | { |
43 | return evtchn_ops->max_channels(); |
44 | } |
45 | |
46 | /* |
47 | * Do any ABI specific setup for a bound event channel before it can |
48 | * be unmasked and used. |
49 | */ |
50 | static inline int xen_evtchn_port_setup(evtchn_port_t evtchn) |
51 | { |
52 | if (evtchn_ops->setup) |
53 | return evtchn_ops->setup(evtchn); |
54 | return 0; |
55 | } |
56 | |
57 | static inline void xen_evtchn_port_remove(evtchn_port_t evtchn, |
58 | unsigned int cpu) |
59 | { |
60 | if (evtchn_ops->remove) |
61 | evtchn_ops->remove(evtchn, cpu); |
62 | } |
63 | |
64 | static inline void xen_evtchn_port_bind_to_cpu(evtchn_port_t evtchn, |
65 | unsigned int cpu, |
66 | unsigned int old_cpu) |
67 | { |
68 | evtchn_ops->bind_to_cpu(evtchn, cpu, old_cpu); |
69 | } |
70 | |
71 | static inline void clear_evtchn(evtchn_port_t port) |
72 | { |
73 | evtchn_ops->clear_pending(port); |
74 | } |
75 | |
76 | static inline void set_evtchn(evtchn_port_t port) |
77 | { |
78 | evtchn_ops->set_pending(port); |
79 | } |
80 | |
81 | static inline bool test_evtchn(evtchn_port_t port) |
82 | { |
83 | return evtchn_ops->is_pending(port); |
84 | } |
85 | |
86 | static inline void mask_evtchn(evtchn_port_t port) |
87 | { |
88 | return evtchn_ops->mask(port); |
89 | } |
90 | |
91 | static inline void unmask_evtchn(evtchn_port_t port) |
92 | { |
93 | return evtchn_ops->unmask(port); |
94 | } |
95 | |
96 | static inline void xen_evtchn_handle_events(unsigned cpu, |
97 | struct evtchn_loop_ctrl *ctrl) |
98 | { |
99 | return evtchn_ops->handle_events(cpu, ctrl); |
100 | } |
101 | |
102 | static inline void xen_evtchn_resume(void) |
103 | { |
104 | if (evtchn_ops->resume) |
105 | evtchn_ops->resume(); |
106 | } |
107 | |
108 | void xen_evtchn_2l_init(void); |
109 | int xen_evtchn_fifo_init(void); |
110 | |
111 | #endif /* #ifndef __EVENTS_INTERNAL_H__ */ |
112 | |