112 lines
2.5 KiB
C
112 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Xen Event Channels (internal header)
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*
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* Copyright (C) 2013 Citrix Systems R&D Ltd.
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*/
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#ifndef __EVENTS_INTERNAL_H__
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#define __EVENTS_INTERNAL_H__
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struct evtchn_loop_ctrl;
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struct evtchn_ops {
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unsigned (*max_channels)(void);
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unsigned (*nr_channels)(void);
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int (*setup)(evtchn_port_t port);
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void (*remove)(evtchn_port_t port, unsigned int cpu);
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void (*bind_to_cpu)(evtchn_port_t evtchn, unsigned int cpu,
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unsigned int old_cpu);
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void (*clear_pending)(evtchn_port_t port);
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void (*set_pending)(evtchn_port_t port);
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bool (*is_pending)(evtchn_port_t port);
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void (*mask)(evtchn_port_t port);
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void (*unmask)(evtchn_port_t port);
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void (*handle_events)(unsigned cpu, struct evtchn_loop_ctrl *ctrl);
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void (*resume)(void);
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int (*percpu_init)(unsigned int cpu);
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int (*percpu_deinit)(unsigned int cpu);
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};
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extern const struct evtchn_ops *evtchn_ops;
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int get_evtchn_to_irq(evtchn_port_t evtchn);
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void handle_irq_for_port(evtchn_port_t port, struct evtchn_loop_ctrl *ctrl);
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unsigned int cpu_from_evtchn(evtchn_port_t evtchn);
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static inline unsigned xen_evtchn_max_channels(void)
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{
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return evtchn_ops->max_channels();
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}
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/*
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* Do any ABI specific setup for a bound event channel before it can
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* be unmasked and used.
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*/
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static inline int xen_evtchn_port_setup(evtchn_port_t evtchn)
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{
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if (evtchn_ops->setup)
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return evtchn_ops->setup(evtchn);
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return 0;
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}
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static inline void xen_evtchn_port_remove(evtchn_port_t evtchn,
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unsigned int cpu)
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{
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if (evtchn_ops->remove)
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evtchn_ops->remove(evtchn, cpu);
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}
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static inline void xen_evtchn_port_bind_to_cpu(evtchn_port_t evtchn,
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unsigned int cpu,
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unsigned int old_cpu)
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{
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evtchn_ops->bind_to_cpu(evtchn, cpu, old_cpu);
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}
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static inline void clear_evtchn(evtchn_port_t port)
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{
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evtchn_ops->clear_pending(port);
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}
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static inline void set_evtchn(evtchn_port_t port)
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{
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evtchn_ops->set_pending(port);
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}
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static inline bool test_evtchn(evtchn_port_t port)
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{
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return evtchn_ops->is_pending(port);
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}
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static inline void mask_evtchn(evtchn_port_t port)
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{
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return evtchn_ops->mask(port);
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}
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static inline void unmask_evtchn(evtchn_port_t port)
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{
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return evtchn_ops->unmask(port);
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}
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static inline void xen_evtchn_handle_events(unsigned cpu,
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struct evtchn_loop_ctrl *ctrl)
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{
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return evtchn_ops->handle_events(cpu, ctrl);
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}
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static inline void xen_evtchn_resume(void)
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{
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if (evtchn_ops->resume)
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evtchn_ops->resume();
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}
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void xen_evtchn_2l_init(void);
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int xen_evtchn_fifo_init(void);
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#endif /* #ifndef __EVENTS_INTERNAL_H__ */
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