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 unsigned xen_evtchn_nr_channels(void); 11 12 int bind_evtchn_to_irq(unsigned int evtchn); 13 int bind_evtchn_to_irqhandler(unsigned int evtchn, 14 irq_handler_t handler, 15 unsigned long irqflags, const char *devname, 16 void *dev_id); 17 int bind_virq_to_irq(unsigned int virq, unsigned int cpu); 18 int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu, 19 irq_handler_t handler, 20 unsigned long irqflags, const char *devname, 21 void *dev_id); 22 int bind_ipi_to_irqhandler(enum ipi_vector ipi, 23 unsigned int cpu, 24 irq_handler_t handler, 25 unsigned long irqflags, 26 const char *devname, 27 void *dev_id); 28 int bind_interdomain_evtchn_to_irqhandler(unsigned int remote_domain, 29 unsigned int remote_port, 30 irq_handler_t handler, 31 unsigned long irqflags, 32 const char *devname, 33 void *dev_id); 34 35 /* 36 * Common unbind function for all event sources. Takes IRQ to unbind from. 37 * Automatically closes the underlying event channel (even for bindings 38 * made with bind_evtchn_to_irqhandler()). 39 */ 40 void unbind_from_irqhandler(unsigned int irq, void *dev_id); 41 42 /* 43 * Allow extra references to event channels exposed to userspace by evtchn 44 */ 45 int evtchn_make_refcounted(unsigned int evtchn); 46 int evtchn_get(unsigned int evtchn); 47 void evtchn_put(unsigned int evtchn); 48 49 void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector); 50 int resend_irq_on_evtchn(unsigned int irq); 51 void rebind_evtchn_irq(int evtchn, int irq); 52 53 static inline void notify_remote_via_evtchn(int port) 54 { 55 struct evtchn_send send = { .port = port }; 56 (void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send); 57 } 58 59 void notify_remote_via_irq(int irq); 60 61 void xen_irq_resume(void); 62 63 /* Clear an irq's pending state, in preparation for polling on it */ 64 void xen_clear_irq_pending(int irq); 65 void xen_set_irq_pending(int irq); 66 bool xen_test_irq_pending(int irq); 67 68 /* Poll waiting for an irq to become pending. In the usual case, the 69 irq will be disabled so it won't deliver an interrupt. */ 70 void xen_poll_irq(int irq); 71 72 /* Poll waiting for an irq to become pending with a timeout. In the usual case, 73 * the irq will be disabled so it won't deliver an interrupt. */ 74 void xen_poll_irq_timeout(int irq, u64 timeout); 75 76 /* Determine the IRQ which is bound to an event channel */ 77 unsigned irq_from_evtchn(unsigned int evtchn); 78 int irq_from_virq(unsigned int cpu, unsigned int virq); 79 unsigned int evtchn_from_irq(unsigned irq); 80 81 /* Xen HVM evtchn vector callback */ 82 void xen_hvm_callback_vector(void); 83 #ifdef CONFIG_TRACING 84 #define trace_xen_hvm_callback_vector xen_hvm_callback_vector 85 #endif 86 extern int xen_have_vector_callback; 87 int xen_set_callback_via(uint64_t via); 88 void xen_evtchn_do_upcall(struct pt_regs *regs); 89 void xen_hvm_evtchn_do_upcall(void); 90 91 /* Bind a pirq for a physical interrupt to an irq. */ 92 int xen_bind_pirq_gsi_to_irq(unsigned gsi, 93 unsigned pirq, int shareable, char *name); 94 95 #ifdef CONFIG_PCI_MSI 96 /* Allocate a pirq for a MSI style physical interrupt. */ 97 int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc); 98 /* Bind an PSI pirq to an irq. */ 99 int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc, 100 int pirq, const char *name, domid_t domid); 101 #endif 102 103 /* De-allocates the above mentioned physical interrupt. */ 104 int xen_destroy_irq(int irq); 105 106 /* Return irq from pirq */ 107 int xen_irq_from_pirq(unsigned pirq); 108 109 /* Return the pirq allocated to the irq. */ 110 int xen_pirq_from_irq(unsigned irq); 111 112 /* Return the irq allocated to the gsi */ 113 int xen_irq_from_gsi(unsigned gsi); 114 115 /* Determine whether to ignore this IRQ if it is passed to a guest. */ 116 int xen_test_irq_shared(int irq); 117 118 /* initialize Xen IRQ subsystem */ 119 void xen_init_IRQ(void); 120 #endif /* _XEN_EVENTS_H */ 121