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); 154fe7d5a7SJeremy Fitzhardinge int bind_virq_to_irq(unsigned int virq, unsigned int cpu); 16e46cdb66SJeremy Fitzhardinge int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu, 17f87e4cacSJeremy Fitzhardinge irq_handler_t handler, 18f87e4cacSJeremy Fitzhardinge unsigned long irqflags, const char *devname, 19f87e4cacSJeremy Fitzhardinge void *dev_id); 20f87e4cacSJeremy Fitzhardinge int bind_ipi_to_irqhandler(enum ipi_vector ipi, 21f87e4cacSJeremy Fitzhardinge unsigned int cpu, 22f87e4cacSJeremy Fitzhardinge irq_handler_t handler, 23f87e4cacSJeremy Fitzhardinge unsigned long irqflags, 24f87e4cacSJeremy Fitzhardinge const char *devname, 25f87e4cacSJeremy Fitzhardinge void *dev_id); 26e46cdb66SJeremy Fitzhardinge 27e46cdb66SJeremy Fitzhardinge /* 28e46cdb66SJeremy Fitzhardinge * Common unbind function for all event sources. Takes IRQ to unbind from. 29e46cdb66SJeremy Fitzhardinge * Automatically closes the underlying event channel (even for bindings 30e46cdb66SJeremy Fitzhardinge * made with bind_evtchn_to_irqhandler()). 31e46cdb66SJeremy Fitzhardinge */ 32e46cdb66SJeremy Fitzhardinge void unbind_from_irqhandler(unsigned int irq, void *dev_id); 33e46cdb66SJeremy Fitzhardinge 34f87e4cacSJeremy Fitzhardinge void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector); 35642e0c88SIsaku Yamahata int resend_irq_on_evtchn(unsigned int irq); 36eb1e305fSJeremy Fitzhardinge void rebind_evtchn_irq(int evtchn, int irq); 37f87e4cacSJeremy Fitzhardinge 38e46cdb66SJeremy Fitzhardinge static inline void notify_remote_via_evtchn(int port) 39e46cdb66SJeremy Fitzhardinge { 40e46cdb66SJeremy Fitzhardinge struct evtchn_send send = { .port = port }; 41e46cdb66SJeremy Fitzhardinge (void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send); 42e46cdb66SJeremy Fitzhardinge } 43e46cdb66SJeremy Fitzhardinge 4476465b2dSIan Campbell void notify_remote_via_irq(int irq); 450e91398fSJeremy Fitzhardinge 4676465b2dSIan Campbell void xen_irq_resume(void); 470e91398fSJeremy Fitzhardinge 482d9e1e2fSJeremy Fitzhardinge /* Clear an irq's pending state, in preparation for polling on it */ 492d9e1e2fSJeremy Fitzhardinge void xen_clear_irq_pending(int irq); 50168d2f46SJeremy Fitzhardinge void xen_set_irq_pending(int irq); 51168d2f46SJeremy Fitzhardinge bool xen_test_irq_pending(int irq); 522d9e1e2fSJeremy Fitzhardinge 532d9e1e2fSJeremy Fitzhardinge /* Poll waiting for an irq to become pending. In the usual case, the 542d9e1e2fSJeremy Fitzhardinge irq will be disabled so it won't deliver an interrupt. */ 552d9e1e2fSJeremy Fitzhardinge void xen_poll_irq(int irq); 562d9e1e2fSJeremy Fitzhardinge 57d9a8814fSKonrad Rzeszutek Wilk /* Poll waiting for an irq to become pending with a timeout. In the usual case, 58d9a8814fSKonrad Rzeszutek Wilk * the irq will be disabled so it won't deliver an interrupt. */ 59d9a8814fSKonrad Rzeszutek Wilk void xen_poll_irq_timeout(int irq, u64 timeout); 60d9a8814fSKonrad Rzeszutek Wilk 61d4c04536SIan Campbell /* Determine the IRQ which is bound to an event channel */ 62d4c04536SIan Campbell unsigned irq_from_evtchn(unsigned int evtchn); 63d4c04536SIan Campbell 6438e20b07SSheng Yang /* Xen HVM evtchn vector callback */ 6576465b2dSIan Campbell void xen_hvm_callback_vector(void); 6638e20b07SSheng Yang extern int xen_have_vector_callback; 6738e20b07SSheng Yang int xen_set_callback_via(uint64_t via); 6838e20b07SSheng Yang void xen_evtchn_do_upcall(struct pt_regs *regs); 6938e20b07SSheng Yang void xen_hvm_evtchn_do_upcall(void); 7038e20b07SSheng Yang 71653378acSIan Campbell /* Allocate an irq for a physical interrupt, given a gsi. */ 7215ebbb82SKonrad Rzeszutek Wilk int xen_allocate_pirq(unsigned gsi, int shareable, char *name); 737a043f11SStefano Stabellini int xen_map_pirq_gsi(unsigned pirq, unsigned gsi, int shareable, char *name); 74f731e3efSQing He 75f731e3efSQing He #ifdef CONFIG_PCI_MSI 76bf480d95SIan Campbell int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc); 77bf480d95SIan Campbell int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc, 78ca1d8fe9SIan Campbell int pirq, int vector, const char *name); 79f731e3efSQing He #endif 80d46a78b0SJeremy Fitzhardinge 81b5401a96SAlex Nixon /* De-allocates the above mentioned physical interrupt. */ 82b5401a96SAlex Nixon int xen_destroy_irq(int irq); 83b5401a96SAlex Nixon 84af42b8d1SStefano Stabellini /* Return irq from pirq */ 85af42b8d1SStefano Stabellini int xen_irq_from_pirq(unsigned pirq); 86af42b8d1SStefano Stabellini 87e46cdb66SJeremy Fitzhardinge #endif /* _XEN_EVENTS_H */ 88