4 #include <linux/interrupt.h>
9 #include <xen/interface/event_channel.h>
10 #include <asm/xen/hypercall.h>
11 #include <asm/xen/events.h>
13 unsigned xen_evtchn_nr_channels(void);
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,
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,
25 int bind_ipi_to_irqhandler(enum ipi_vector ipi,
27 irq_handler_t handler,
28 unsigned long irqflags,
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,
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()).
45 void unbind_from_irqhandler(unsigned int irq, void *dev_id);
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);
53 * Allow extra references to event channels exposed to userspace by evtchn
55 int evtchn_make_refcounted(unsigned int evtchn);
56 int evtchn_get(unsigned int evtchn);
57 void evtchn_put(unsigned int evtchn);
59 void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector);
60 void rebind_evtchn_irq(int evtchn, int irq);
62 static inline void notify_remote_via_evtchn(int port)
64 struct evtchn_send send = { .port = port };
65 (void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send);
68 void notify_remote_via_irq(int irq);
70 void xen_irq_resume(void);
72 /* Clear an irq's pending state, in preparation for polling on it */
73 void xen_clear_irq_pending(int irq);
74 void xen_set_irq_pending(int irq);
75 bool xen_test_irq_pending(int irq);
77 /* Poll waiting for an irq to become pending. In the usual case, the
78 irq will be disabled so it won't deliver an interrupt. */
79 void xen_poll_irq(int irq);
81 /* Poll waiting for an irq to become pending with a timeout. In the usual case,
82 * the irq will be disabled so it won't deliver an interrupt. */
83 void xen_poll_irq_timeout(int irq, u64 timeout);
85 /* Determine the IRQ which is bound to an event channel */
86 unsigned irq_from_evtchn(unsigned int evtchn);
87 int irq_from_virq(unsigned int cpu, unsigned int virq);
88 unsigned int evtchn_from_irq(unsigned irq);
90 /* Xen HVM evtchn vector callback */
91 void xen_hvm_callback_vector(void);
93 #define trace_xen_hvm_callback_vector xen_hvm_callback_vector
95 int xen_set_callback_via(uint64_t via);
96 void xen_evtchn_do_upcall(struct pt_regs *regs);
97 void xen_hvm_evtchn_do_upcall(void);
99 /* Bind a pirq for a physical interrupt to an irq. */
100 int xen_bind_pirq_gsi_to_irq(unsigned gsi,
101 unsigned pirq, int shareable, char *name);
103 #ifdef CONFIG_PCI_MSI
104 /* Allocate a pirq for a MSI style physical interrupt. */
105 int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc);
106 /* Bind an PSI pirq to an irq. */
107 int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc,
108 int pirq, int nvec, const char *name, domid_t domid);
111 /* De-allocates the above mentioned physical interrupt. */
112 int xen_destroy_irq(int irq);
114 /* Return irq from pirq */
115 int xen_irq_from_pirq(unsigned pirq);
117 /* Return the pirq allocated to the irq. */
118 int xen_pirq_from_irq(unsigned irq);
120 /* Return the irq allocated to the gsi */
121 int xen_irq_from_gsi(unsigned gsi);
123 /* Determine whether to ignore this IRQ if it is passed to a guest. */
124 int xen_test_irq_shared(int irq);
126 /* initialize Xen IRQ subsystem */
127 void xen_init_IRQ(void);
128 #endif /* _XEN_EVENTS_H */