1 #ifndef _XEN_EVENTS_H 2 #define _XEN_EVENTS_H 3 4 #include <linux/interrupt.h> 5 6 #include <xen/interface/event_channel.h> 7 #include <asm/xen/hypercall.h> 8 #include <asm/xen/events.h> 9 10 int bind_evtchn_to_irq(unsigned int evtchn); 11 int bind_evtchn_to_irqhandler(unsigned int evtchn, 12 irq_handler_t handler, 13 unsigned long irqflags, const char *devname, 14 void *dev_id); 15 int bind_virq_to_irq(unsigned int virq, unsigned int cpu); 16 int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu, 17 irq_handler_t handler, 18 unsigned long irqflags, const char *devname, 19 void *dev_id); 20 int bind_ipi_to_irqhandler(enum ipi_vector ipi, 21 unsigned int cpu, 22 irq_handler_t handler, 23 unsigned long irqflags, 24 const char *devname, 25 void *dev_id); 26 int bind_interdomain_evtchn_to_irqhandler(unsigned int remote_domain, 27 unsigned int remote_port, 28 irq_handler_t handler, 29 unsigned long irqflags, 30 const char *devname, 31 void *dev_id); 32 33 /* 34 * Common unbind function for all event sources. Takes IRQ to unbind from. 35 * Automatically closes the underlying event channel (even for bindings 36 * made with bind_evtchn_to_irqhandler()). 37 */ 38 void unbind_from_irqhandler(unsigned int irq, void *dev_id); 39 40 /* 41 * Allow extra references to event channels exposed to userspace by evtchn 42 */ 43 int evtchn_make_refcounted(unsigned int evtchn); 44 int evtchn_get(unsigned int evtchn); 45 void evtchn_put(unsigned int evtchn); 46 47 void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector); 48 int resend_irq_on_evtchn(unsigned int irq); 49 void rebind_evtchn_irq(int evtchn, int irq); 50 51 static inline void notify_remote_via_evtchn(int port) 52 { 53 struct evtchn_send send = { .port = port }; 54 (void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send); 55 } 56 57 void notify_remote_via_irq(int irq); 58 59 void xen_irq_resume(void); 60 61 /* Clear an irq's pending state, in preparation for polling on it */ 62 void xen_clear_irq_pending(int irq); 63 void xen_set_irq_pending(int irq); 64 bool xen_test_irq_pending(int irq); 65 66 /* Poll waiting for an irq to become pending. In the usual case, the 67 irq will be disabled so it won't deliver an interrupt. */ 68 void xen_poll_irq(int irq); 69 70 /* Poll waiting for an irq to become pending with a timeout. In the usual case, 71 * the irq will be disabled so it won't deliver an interrupt. */ 72 void xen_poll_irq_timeout(int irq, u64 timeout); 73 74 /* Determine the IRQ which is bound to an event channel */ 75 unsigned irq_from_evtchn(unsigned int evtchn); 76 int irq_from_virq(unsigned int cpu, unsigned int virq); 77 unsigned int evtchn_from_irq(unsigned irq); 78 79 /* Xen HVM evtchn vector callback */ 80 void xen_hvm_callback_vector(void); 81 #ifdef CONFIG_TRACING 82 #define trace_xen_hvm_callback_vector xen_hvm_callback_vector 83 #endif 84 extern int xen_have_vector_callback; 85 int xen_set_callback_via(uint64_t via); 86 void xen_evtchn_do_upcall(struct pt_regs *regs); 87 void xen_hvm_evtchn_do_upcall(void); 88 89 /* Bind a pirq for a physical interrupt to an irq. */ 90 int xen_bind_pirq_gsi_to_irq(unsigned gsi, 91 unsigned pirq, int shareable, char *name); 92 93 #ifdef CONFIG_PCI_MSI 94 /* Allocate a pirq for a MSI style physical interrupt. */ 95 int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc); 96 /* Bind an PSI pirq to an irq. */ 97 int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc, 98 int pirq, const char *name, domid_t domid); 99 #endif 100 101 /* De-allocates the above mentioned physical interrupt. */ 102 int xen_destroy_irq(int irq); 103 104 /* Return irq from pirq */ 105 int xen_irq_from_pirq(unsigned pirq); 106 107 /* Return the pirq allocated to the irq. */ 108 int xen_pirq_from_irq(unsigned irq); 109 110 /* Return the irq allocated to the gsi */ 111 int xen_irq_from_gsi(unsigned gsi); 112 113 /* Determine whether to ignore this IRQ if it is passed to a guest. */ 114 int xen_test_irq_shared(int irq); 115 116 /* initialize Xen IRQ subsystem */ 117 void xen_init_IRQ(void); 118 #endif /* _XEN_EVENTS_H */ 119