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