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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 10struct evtchn_loop_ctrl;11 12struct 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 34extern const struct evtchn_ops *evtchn_ops;35 36void handle_irq_for_port(evtchn_port_t port, struct evtchn_loop_ctrl *ctrl);37 38unsigned int cpu_from_evtchn(evtchn_port_t evtchn);39 40static inline unsigned xen_evtchn_max_channels(void)41{42 return evtchn_ops->max_channels();43}44 45/*46 * Do any ABI specific setup for a bound event channel before it can47 * be unmasked and used.48 */49static inline int xen_evtchn_port_setup(evtchn_port_t evtchn)50{51 if (evtchn_ops->setup)52 return evtchn_ops->setup(evtchn);53 return 0;54}55 56static inline void xen_evtchn_port_remove(evtchn_port_t evtchn,57 unsigned int cpu)58{59 if (evtchn_ops->remove)60 evtchn_ops->remove(evtchn, cpu);61}62 63static inline void xen_evtchn_port_bind_to_cpu(evtchn_port_t evtchn,64 unsigned int cpu,65 unsigned int old_cpu)66{67 evtchn_ops->bind_to_cpu(evtchn, cpu, old_cpu);68}69 70static inline void clear_evtchn(evtchn_port_t port)71{72 evtchn_ops->clear_pending(port);73}74 75static inline void set_evtchn(evtchn_port_t port)76{77 evtchn_ops->set_pending(port);78}79 80static inline bool test_evtchn(evtchn_port_t port)81{82 return evtchn_ops->is_pending(port);83}84 85static inline void mask_evtchn(evtchn_port_t port)86{87 return evtchn_ops->mask(port);88}89 90static inline void unmask_evtchn(evtchn_port_t port)91{92 return evtchn_ops->unmask(port);93}94 95static inline void xen_evtchn_handle_events(unsigned cpu,96 struct evtchn_loop_ctrl *ctrl)97{98 return evtchn_ops->handle_events(cpu, ctrl);99}100 101static inline void xen_evtchn_resume(void)102{103 if (evtchn_ops->resume)104 evtchn_ops->resume();105}106 107void xen_evtchn_2l_init(void);108int xen_evtchn_fifo_init(void);109 110#endif /* #ifndef __EVENTS_INTERNAL_H__ */111