1e46cdb66SJeremy Fitzhardinge #ifndef _XEN_EVENTS_H 2e46cdb66SJeremy Fitzhardinge #define _XEN_EVENTS_H 3e46cdb66SJeremy Fitzhardinge 4f87e4cacSJeremy Fitzhardinge #include <linux/interrupt.h> 5f87e4cacSJeremy Fitzhardinge 6f87e4cacSJeremy Fitzhardinge #include <xen/interface/event_channel.h> 7f87e4cacSJeremy Fitzhardinge #include <asm/xen/hypercall.h> 8e849c3e9SIsaku Yamahata #include <asm/xen/events.h> 9e46cdb66SJeremy Fitzhardinge 10b536b4b9SJeremy Fitzhardinge int bind_evtchn_to_irq(unsigned int evtchn); 11e46cdb66SJeremy Fitzhardinge int bind_evtchn_to_irqhandler(unsigned int evtchn, 12f87e4cacSJeremy Fitzhardinge irq_handler_t handler, 13e46cdb66SJeremy Fitzhardinge unsigned long irqflags, const char *devname, 14e46cdb66SJeremy Fitzhardinge void *dev_id); 15e46cdb66SJeremy Fitzhardinge int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu, 16f87e4cacSJeremy Fitzhardinge irq_handler_t handler, 17f87e4cacSJeremy Fitzhardinge unsigned long irqflags, const char *devname, 18f87e4cacSJeremy Fitzhardinge void *dev_id); 19f87e4cacSJeremy Fitzhardinge int bind_ipi_to_irqhandler(enum ipi_vector ipi, 20f87e4cacSJeremy Fitzhardinge unsigned int cpu, 21f87e4cacSJeremy Fitzhardinge irq_handler_t handler, 22f87e4cacSJeremy Fitzhardinge unsigned long irqflags, 23f87e4cacSJeremy Fitzhardinge const char *devname, 24f87e4cacSJeremy Fitzhardinge void *dev_id); 25e46cdb66SJeremy Fitzhardinge 26e46cdb66SJeremy Fitzhardinge /* 27e46cdb66SJeremy Fitzhardinge * Common unbind function for all event sources. Takes IRQ to unbind from. 28e46cdb66SJeremy Fitzhardinge * Automatically closes the underlying event channel (even for bindings 29e46cdb66SJeremy Fitzhardinge * made with bind_evtchn_to_irqhandler()). 30e46cdb66SJeremy Fitzhardinge */ 31e46cdb66SJeremy Fitzhardinge void unbind_from_irqhandler(unsigned int irq, void *dev_id); 32e46cdb66SJeremy Fitzhardinge 33f87e4cacSJeremy Fitzhardinge void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector); 34642e0c88SIsaku Yamahata int resend_irq_on_evtchn(unsigned int irq); 35eb1e305fSJeremy Fitzhardinge void rebind_evtchn_irq(int evtchn, int irq); 36f87e4cacSJeremy Fitzhardinge 37e46cdb66SJeremy Fitzhardinge static inline void notify_remote_via_evtchn(int port) 38e46cdb66SJeremy Fitzhardinge { 39e46cdb66SJeremy Fitzhardinge struct evtchn_send send = { .port = port }; 40e46cdb66SJeremy Fitzhardinge (void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send); 41e46cdb66SJeremy Fitzhardinge } 42e46cdb66SJeremy Fitzhardinge 43e46cdb66SJeremy Fitzhardinge extern void notify_remote_via_irq(int irq); 440e91398fSJeremy Fitzhardinge 450e91398fSJeremy Fitzhardinge extern void xen_irq_resume(void); 460e91398fSJeremy Fitzhardinge 472d9e1e2fSJeremy Fitzhardinge /* Clear an irq's pending state, in preparation for polling on it */ 482d9e1e2fSJeremy Fitzhardinge void xen_clear_irq_pending(int irq); 49168d2f46SJeremy Fitzhardinge void xen_set_irq_pending(int irq); 50168d2f46SJeremy Fitzhardinge bool xen_test_irq_pending(int irq); 512d9e1e2fSJeremy Fitzhardinge 522d9e1e2fSJeremy Fitzhardinge /* Poll waiting for an irq to become pending. In the usual case, the 532d9e1e2fSJeremy Fitzhardinge irq will be disabled so it won't deliver an interrupt. */ 542d9e1e2fSJeremy Fitzhardinge void xen_poll_irq(int irq); 552d9e1e2fSJeremy Fitzhardinge 56d4c04536SIan Campbell /* Determine the IRQ which is bound to an event channel */ 57d4c04536SIan Campbell unsigned irq_from_evtchn(unsigned int evtchn); 58d4c04536SIan Campbell 5938e20b07SSheng Yang /* Xen HVM evtchn vector callback */ 6038e20b07SSheng Yang extern void xen_hvm_callback_vector(void); 6138e20b07SSheng Yang extern int xen_have_vector_callback; 6238e20b07SSheng Yang int xen_set_callback_via(uint64_t via); 6338e20b07SSheng Yang void xen_evtchn_do_upcall(struct pt_regs *regs); 6438e20b07SSheng Yang void xen_hvm_evtchn_do_upcall(void); 6538e20b07SSheng Yang 66e46cdb66SJeremy Fitzhardinge #endif /* _XEN_EVENTS_H */ 67