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111 lines
2.5 KiB
111 lines
2.5 KiB
/* 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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