1 #ifndef _XEN_EVENTS_H 2 #define _XEN_EVENTS_H 3 4 #include <linux/interrupt.h> 5 #ifdef CONFIG_PCI_MSI 6 #include <linux/msi.h> 7 #endif 8 9 #include <xen/interface/event_channel.h> 10 #include <asm/xen/hypercall.h> 11 #include <asm/xen/events.h> 12 13 unsigned xen_evtchn_nr_channels(void); 14 15 int bind_evtchn_to_irq(unsigned int evtchn); 16 int bind_evtchn_to_irqhandler(unsigned int evtchn, 17 irq_handler_t handler, 18 unsigned long irqflags, const char *devname, 19 void *dev_id); 20 int bind_virq_to_irq(unsigned int virq, unsigned int cpu, bool percpu); 21 int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu, 22 irq_handler_t handler, 23 unsigned long irqflags, const char *devname, 24 void *dev_id); 25 int bind_ipi_to_irqhandler(enum ipi_vector ipi, 26 unsigned int cpu, 27 irq_handler_t handler, 28 unsigned long irqflags, 29 const char *devname, 30 void *dev_id); 31 int bind_interdomain_evtchn_to_irq(unsigned int remote_domain, 32 unsigned int remote_port); 33 int bind_interdomain_evtchn_to_irqhandler(unsigned int remote_domain, 34 unsigned int remote_port, 35 irq_handler_t handler, 36 unsigned long irqflags, 37 const char *devname, 38 void *dev_id); 39 40 /* 41 * Common unbind function for all event sources. Takes IRQ to unbind from. 42 * Automatically closes the underlying event channel (even for bindings 43 * made with bind_evtchn_to_irqhandler()). 44 */ 45 void unbind_from_irqhandler(unsigned int irq, void *dev_id); 46 47 #define XEN_IRQ_PRIORITY_MAX EVTCHN_FIFO_PRIORITY_MAX 48 #define XEN_IRQ_PRIORITY_DEFAULT EVTCHN_FIFO_PRIORITY_DEFAULT 49 #define XEN_IRQ_PRIORITY_MIN EVTCHN_FIFO_PRIORITY_MIN 50 int xen_set_irq_priority(unsigned irq, unsigned priority); 51 52 /* 53 * Allow extra references to event channels exposed to userspace by evtchn 54 */ 55 int evtchn_make_refcounted(unsigned int evtchn); 56 int evtchn_get(unsigned int evtchn); 57 void evtchn_put(unsigned int evtchn); 58 59 void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector); 60 void rebind_evtchn_irq(int evtchn, int irq); 61 int xen_rebind_evtchn_to_cpu(int evtchn, unsigned tcpu); 62 63 static inline void notify_remote_via_evtchn(int port) 64 { 65 struct evtchn_send send = { .port = port }; 66 (void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send); 67 } 68 69 void notify_remote_via_irq(int irq); 70 71 void xen_irq_resume(void); 72 73 /* Clear an irq's pending state, in preparation for polling on it */ 74 void xen_clear_irq_pending(int irq); 75 void xen_set_irq_pending(int irq); 76 bool xen_test_irq_pending(int irq); 77 78 /* Poll waiting for an irq to become pending. In the usual case, the 79 irq will be disabled so it won't deliver an interrupt. */ 80 void xen_poll_irq(int irq); 81 82 /* Poll waiting for an irq to become pending with a timeout. In the usual case, 83 * the irq will be disabled so it won't deliver an interrupt. */ 84 void xen_poll_irq_timeout(int irq, u64 timeout); 85 86 /* Determine the IRQ which is bound to an event channel */ 87 unsigned irq_from_evtchn(unsigned int evtchn); 88 int irq_from_virq(unsigned int cpu, unsigned int virq); 89 unsigned int evtchn_from_irq(unsigned irq); 90 91 /* Xen HVM evtchn vector callback */ 92 void xen_hvm_callback_vector(void); 93 #ifdef CONFIG_TRACING 94 #define trace_xen_hvm_callback_vector xen_hvm_callback_vector 95 #endif 96 int xen_set_callback_via(uint64_t via); 97 void xen_evtchn_do_upcall(struct pt_regs *regs); 98 void xen_hvm_evtchn_do_upcall(void); 99 100 /* Bind a pirq for a physical interrupt to an irq. */ 101 int xen_bind_pirq_gsi_to_irq(unsigned gsi, 102 unsigned pirq, int shareable, char *name); 103 104 #ifdef CONFIG_PCI_MSI 105 /* Allocate a pirq for a MSI style physical interrupt. */ 106 int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc); 107 /* Bind an PSI pirq to an irq. */ 108 int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc, 109 int pirq, int nvec, const char *name, domid_t domid); 110 #endif 111 112 /* De-allocates the above mentioned physical interrupt. */ 113 int xen_destroy_irq(int irq); 114 115 /* Return irq from pirq */ 116 int xen_irq_from_pirq(unsigned pirq); 117 118 /* Return the pirq allocated to the irq. */ 119 int xen_pirq_from_irq(unsigned irq); 120 121 /* Return the irq allocated to the gsi */ 122 int xen_irq_from_gsi(unsigned gsi); 123 124 /* Determine whether to ignore this IRQ if it is passed to a guest. */ 125 int xen_test_irq_shared(int irq); 126 127 /* initialize Xen IRQ subsystem */ 128 void xen_init_IRQ(void); 129 #endif /* _XEN_EVENTS_H */ 130