1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-or-later */
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Xen Event Channels (internal header)
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2013 Citrix Systems R&D Ltd.
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun #ifndef __EVENTS_INTERNAL_H__
8*4882a593Smuzhiyun #define __EVENTS_INTERNAL_H__
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun struct evtchn_loop_ctrl;
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun struct evtchn_ops {
13*4882a593Smuzhiyun unsigned (*max_channels)(void);
14*4882a593Smuzhiyun unsigned (*nr_channels)(void);
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun int (*setup)(evtchn_port_t port);
17*4882a593Smuzhiyun void (*remove)(evtchn_port_t port, unsigned int cpu);
18*4882a593Smuzhiyun void (*bind_to_cpu)(evtchn_port_t evtchn, unsigned int cpu,
19*4882a593Smuzhiyun unsigned int old_cpu);
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun void (*clear_pending)(evtchn_port_t port);
22*4882a593Smuzhiyun void (*set_pending)(evtchn_port_t port);
23*4882a593Smuzhiyun bool (*is_pending)(evtchn_port_t port);
24*4882a593Smuzhiyun void (*mask)(evtchn_port_t port);
25*4882a593Smuzhiyun void (*unmask)(evtchn_port_t port);
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun void (*handle_events)(unsigned cpu, struct evtchn_loop_ctrl *ctrl);
28*4882a593Smuzhiyun void (*resume)(void);
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun int (*percpu_init)(unsigned int cpu);
31*4882a593Smuzhiyun int (*percpu_deinit)(unsigned int cpu);
32*4882a593Smuzhiyun };
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun extern const struct evtchn_ops *evtchn_ops;
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun int get_evtchn_to_irq(evtchn_port_t evtchn);
37*4882a593Smuzhiyun void handle_irq_for_port(evtchn_port_t port, struct evtchn_loop_ctrl *ctrl);
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun unsigned int cpu_from_evtchn(evtchn_port_t evtchn);
40*4882a593Smuzhiyun
xen_evtchn_max_channels(void)41*4882a593Smuzhiyun static inline unsigned xen_evtchn_max_channels(void)
42*4882a593Smuzhiyun {
43*4882a593Smuzhiyun return evtchn_ops->max_channels();
44*4882a593Smuzhiyun }
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun /*
47*4882a593Smuzhiyun * Do any ABI specific setup for a bound event channel before it can
48*4882a593Smuzhiyun * be unmasked and used.
49*4882a593Smuzhiyun */
xen_evtchn_port_setup(evtchn_port_t evtchn)50*4882a593Smuzhiyun static inline int xen_evtchn_port_setup(evtchn_port_t evtchn)
51*4882a593Smuzhiyun {
52*4882a593Smuzhiyun if (evtchn_ops->setup)
53*4882a593Smuzhiyun return evtchn_ops->setup(evtchn);
54*4882a593Smuzhiyun return 0;
55*4882a593Smuzhiyun }
56*4882a593Smuzhiyun
xen_evtchn_port_remove(evtchn_port_t evtchn,unsigned int cpu)57*4882a593Smuzhiyun static inline void xen_evtchn_port_remove(evtchn_port_t evtchn,
58*4882a593Smuzhiyun unsigned int cpu)
59*4882a593Smuzhiyun {
60*4882a593Smuzhiyun if (evtchn_ops->remove)
61*4882a593Smuzhiyun evtchn_ops->remove(evtchn, cpu);
62*4882a593Smuzhiyun }
63*4882a593Smuzhiyun
xen_evtchn_port_bind_to_cpu(evtchn_port_t evtchn,unsigned int cpu,unsigned int old_cpu)64*4882a593Smuzhiyun static inline void xen_evtchn_port_bind_to_cpu(evtchn_port_t evtchn,
65*4882a593Smuzhiyun unsigned int cpu,
66*4882a593Smuzhiyun unsigned int old_cpu)
67*4882a593Smuzhiyun {
68*4882a593Smuzhiyun evtchn_ops->bind_to_cpu(evtchn, cpu, old_cpu);
69*4882a593Smuzhiyun }
70*4882a593Smuzhiyun
clear_evtchn(evtchn_port_t port)71*4882a593Smuzhiyun static inline void clear_evtchn(evtchn_port_t port)
72*4882a593Smuzhiyun {
73*4882a593Smuzhiyun evtchn_ops->clear_pending(port);
74*4882a593Smuzhiyun }
75*4882a593Smuzhiyun
set_evtchn(evtchn_port_t port)76*4882a593Smuzhiyun static inline void set_evtchn(evtchn_port_t port)
77*4882a593Smuzhiyun {
78*4882a593Smuzhiyun evtchn_ops->set_pending(port);
79*4882a593Smuzhiyun }
80*4882a593Smuzhiyun
test_evtchn(evtchn_port_t port)81*4882a593Smuzhiyun static inline bool test_evtchn(evtchn_port_t port)
82*4882a593Smuzhiyun {
83*4882a593Smuzhiyun return evtchn_ops->is_pending(port);
84*4882a593Smuzhiyun }
85*4882a593Smuzhiyun
mask_evtchn(evtchn_port_t port)86*4882a593Smuzhiyun static inline void mask_evtchn(evtchn_port_t port)
87*4882a593Smuzhiyun {
88*4882a593Smuzhiyun return evtchn_ops->mask(port);
89*4882a593Smuzhiyun }
90*4882a593Smuzhiyun
unmask_evtchn(evtchn_port_t port)91*4882a593Smuzhiyun static inline void unmask_evtchn(evtchn_port_t port)
92*4882a593Smuzhiyun {
93*4882a593Smuzhiyun return evtchn_ops->unmask(port);
94*4882a593Smuzhiyun }
95*4882a593Smuzhiyun
xen_evtchn_handle_events(unsigned cpu,struct evtchn_loop_ctrl * ctrl)96*4882a593Smuzhiyun static inline void xen_evtchn_handle_events(unsigned cpu,
97*4882a593Smuzhiyun struct evtchn_loop_ctrl *ctrl)
98*4882a593Smuzhiyun {
99*4882a593Smuzhiyun return evtchn_ops->handle_events(cpu, ctrl);
100*4882a593Smuzhiyun }
101*4882a593Smuzhiyun
xen_evtchn_resume(void)102*4882a593Smuzhiyun static inline void xen_evtchn_resume(void)
103*4882a593Smuzhiyun {
104*4882a593Smuzhiyun if (evtchn_ops->resume)
105*4882a593Smuzhiyun evtchn_ops->resume();
106*4882a593Smuzhiyun }
107*4882a593Smuzhiyun
108*4882a593Smuzhiyun void xen_evtchn_2l_init(void);
109*4882a593Smuzhiyun int xen_evtchn_fifo_init(void);
110*4882a593Smuzhiyun
111*4882a593Smuzhiyun #endif /* #ifndef __EVENTS_INTERNAL_H__ */
112