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); 262e820f58SIan Campbell int bind_interdomain_evtchn_to_irqhandler(unsigned int remote_domain, 272e820f58SIan Campbell unsigned int remote_port, 282e820f58SIan Campbell irq_handler_t handler, 292e820f58SIan Campbell unsigned long irqflags, 302e820f58SIan Campbell const char *devname, 312e820f58SIan Campbell void *dev_id); 32e46cdb66SJeremy Fitzhardinge 33e46cdb66SJeremy Fitzhardinge /* 34e46cdb66SJeremy Fitzhardinge * Common unbind function for all event sources. Takes IRQ to unbind from. 35e46cdb66SJeremy Fitzhardinge * Automatically closes the underlying event channel (even for bindings 36e46cdb66SJeremy Fitzhardinge * made with bind_evtchn_to_irqhandler()). 37e46cdb66SJeremy Fitzhardinge */ 38e46cdb66SJeremy Fitzhardinge void unbind_from_irqhandler(unsigned int irq, void *dev_id); 39e46cdb66SJeremy Fitzhardinge 40420eb554SDaniel De Graaf /* 41420eb554SDaniel De Graaf * Allow extra references to event channels exposed to userspace by evtchn 42420eb554SDaniel De Graaf */ 43420eb554SDaniel De Graaf int evtchn_make_refcounted(unsigned int evtchn); 44420eb554SDaniel De Graaf int evtchn_get(unsigned int evtchn); 45420eb554SDaniel De Graaf void evtchn_put(unsigned int evtchn); 46420eb554SDaniel De Graaf 47f87e4cacSJeremy Fitzhardinge void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector); 48642e0c88SIsaku Yamahata int resend_irq_on_evtchn(unsigned int irq); 49eb1e305fSJeremy Fitzhardinge void rebind_evtchn_irq(int evtchn, int irq); 50f87e4cacSJeremy Fitzhardinge 51e46cdb66SJeremy Fitzhardinge static inline void notify_remote_via_evtchn(int port) 52e46cdb66SJeremy Fitzhardinge { 53e46cdb66SJeremy Fitzhardinge struct evtchn_send send = { .port = port }; 54e46cdb66SJeremy Fitzhardinge (void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send); 55e46cdb66SJeremy Fitzhardinge } 56e46cdb66SJeremy Fitzhardinge 5776465b2dSIan Campbell void notify_remote_via_irq(int irq); 580e91398fSJeremy Fitzhardinge 5976465b2dSIan Campbell void xen_irq_resume(void); 600e91398fSJeremy Fitzhardinge 612d9e1e2fSJeremy Fitzhardinge /* Clear an irq's pending state, in preparation for polling on it */ 622d9e1e2fSJeremy Fitzhardinge void xen_clear_irq_pending(int irq); 63168d2f46SJeremy Fitzhardinge void xen_set_irq_pending(int irq); 64168d2f46SJeremy Fitzhardinge bool xen_test_irq_pending(int irq); 652d9e1e2fSJeremy Fitzhardinge 662d9e1e2fSJeremy Fitzhardinge /* Poll waiting for an irq to become pending. In the usual case, the 672d9e1e2fSJeremy Fitzhardinge irq will be disabled so it won't deliver an interrupt. */ 682d9e1e2fSJeremy Fitzhardinge void xen_poll_irq(int irq); 692d9e1e2fSJeremy Fitzhardinge 70d9a8814fSKonrad Rzeszutek Wilk /* Poll waiting for an irq to become pending with a timeout. In the usual case, 71d9a8814fSKonrad Rzeszutek Wilk * the irq will be disabled so it won't deliver an interrupt. */ 72d9a8814fSKonrad Rzeszutek Wilk void xen_poll_irq_timeout(int irq, u64 timeout); 73d9a8814fSKonrad Rzeszutek Wilk 74d4c04536SIan Campbell /* Determine the IRQ which is bound to an event channel */ 75d4c04536SIan Campbell unsigned irq_from_evtchn(unsigned int evtchn); 76d4c04536SIan Campbell 7738e20b07SSheng Yang /* Xen HVM evtchn vector callback */ 7876465b2dSIan Campbell void xen_hvm_callback_vector(void); 7938e20b07SSheng Yang extern int xen_have_vector_callback; 8038e20b07SSheng Yang int xen_set_callback_via(uint64_t via); 8138e20b07SSheng Yang void xen_evtchn_do_upcall(struct pt_regs *regs); 8238e20b07SSheng Yang void xen_hvm_evtchn_do_upcall(void); 8338e20b07SSheng Yang 84f4d0635bSIan Campbell /* Bind a pirq for a physical interrupt to an irq. */ 85f4d0635bSIan Campbell int xen_bind_pirq_gsi_to_irq(unsigned gsi, 86f4d0635bSIan Campbell unsigned pirq, int shareable, char *name); 87f731e3efSQing He 88f731e3efSQing He #ifdef CONFIG_PCI_MSI 89f4d0635bSIan Campbell /* Allocate a pirq for a MSI style physical interrupt. */ 90bf480d95SIan Campbell int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc); 91f4d0635bSIan Campbell /* Bind an PSI pirq to an irq. */ 92bf480d95SIan Campbell int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc, 93beafbdc1SKonrad Rzeszutek Wilk int pirq, int vector, const char *name, 94beafbdc1SKonrad Rzeszutek Wilk domid_t domid); 95f731e3efSQing He #endif 96d46a78b0SJeremy Fitzhardinge 97b5401a96SAlex Nixon /* De-allocates the above mentioned physical interrupt. */ 98b5401a96SAlex Nixon int xen_destroy_irq(int irq); 99b5401a96SAlex Nixon 100af42b8d1SStefano Stabellini /* Return irq from pirq */ 101af42b8d1SStefano Stabellini int xen_irq_from_pirq(unsigned pirq); 102af42b8d1SStefano Stabellini 103e6197accSKonrad Rzeszutek Wilk /* Return the pirq allocated to the irq. */ 104e6197accSKonrad Rzeszutek Wilk int xen_pirq_from_irq(unsigned irq); 105e6197accSKonrad Rzeszutek Wilk 10668c2c39aSStefano Stabellini /* Return the irq allocated to the gsi */ 10768c2c39aSStefano Stabellini int xen_irq_from_gsi(unsigned gsi); 10868c2c39aSStefano Stabellini 109c7c2c3a2SKonrad Rzeszutek Wilk /* Determine whether to ignore this IRQ if it is passed to a guest. */ 110c7c2c3a2SKonrad Rzeszutek Wilk int xen_test_irq_shared(int irq); 111c7c2c3a2SKonrad Rzeszutek Wilk 1120ec53ecfSStefano Stabellini /* initialize Xen IRQ subsystem */ 1130ec53ecfSStefano Stabellini void xen_init_IRQ(void); 114e46cdb66SJeremy Fitzhardinge #endif /* _XEN_EVENTS_H */ 115