4 #include <linux/interrupt.h>
6 #include <xen/interface/event_channel.h>
7 #include <asm/xen/hypercall.h>
8 #include <asm/xen/events.h>
10 unsigned xen_evtchn_nr_channels(void);
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,
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,
22 int bind_ipi_to_irqhandler(enum ipi_vector ipi,
24 irq_handler_t handler,
25 unsigned long irqflags,
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,
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()).
40 void unbind_from_irqhandler(unsigned int irq, void *dev_id);
42 #define XEN_IRQ_PRIORITY_MAX EVTCHN_FIFO_PRIORITY_MAX
43 #define XEN_IRQ_PRIORITY_DEFAULT EVTCHN_FIFO_PRIORITY_DEFAULT
44 #define XEN_IRQ_PRIORITY_MIN EVTCHN_FIFO_PRIORITY_MIN
45 int xen_set_irq_priority(unsigned irq, unsigned priority);
48 * Allow extra references to event channels exposed to userspace by evtchn
50 int evtchn_make_refcounted(unsigned int evtchn);
51 int evtchn_get(unsigned int evtchn);
52 void evtchn_put(unsigned int evtchn);
54 void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector);
55 int resend_irq_on_evtchn(unsigned int irq);
56 void rebind_evtchn_irq(int evtchn, int irq);
58 static inline void notify_remote_via_evtchn(int port)
60 struct evtchn_send send = { .port = port };
61 (void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send);
64 void notify_remote_via_irq(int irq);
66 void xen_irq_resume(void);
68 /* Clear an irq's pending state, in preparation for polling on it */
69 void xen_clear_irq_pending(int irq);
70 void xen_set_irq_pending(int irq);
71 bool xen_test_irq_pending(int irq);
73 /* Poll waiting for an irq to become pending. In the usual case, the
74 irq will be disabled so it won't deliver an interrupt. */
75 void xen_poll_irq(int irq);
77 /* Poll waiting for an irq to become pending with a timeout. In the usual case,
78 * the irq will be disabled so it won't deliver an interrupt. */
79 void xen_poll_irq_timeout(int irq, u64 timeout);
81 /* Determine the IRQ which is bound to an event channel */
82 unsigned irq_from_evtchn(unsigned int evtchn);
83 int irq_from_virq(unsigned int cpu, unsigned int virq);
84 unsigned int evtchn_from_irq(unsigned irq);
86 /* Xen HVM evtchn vector callback */
87 void xen_hvm_callback_vector(void);
89 #define trace_xen_hvm_callback_vector xen_hvm_callback_vector
91 extern int xen_have_vector_callback;
92 int xen_set_callback_via(uint64_t via);
93 void xen_evtchn_do_upcall(struct pt_regs *regs);
94 void xen_hvm_evtchn_do_upcall(void);
96 /* Bind a pirq for a physical interrupt to an irq. */
97 int xen_bind_pirq_gsi_to_irq(unsigned gsi,
98 unsigned pirq, int shareable, char *name);
100 #ifdef CONFIG_PCI_MSI
101 /* Allocate a pirq for a MSI style physical interrupt. */
102 int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc);
103 /* Bind an PSI pirq to an irq. */
104 int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc,
105 int pirq, const char *name, domid_t domid);
108 /* De-allocates the above mentioned physical interrupt. */
109 int xen_destroy_irq(int irq);
111 /* Return irq from pirq */
112 int xen_irq_from_pirq(unsigned pirq);
114 /* Return the pirq allocated to the irq. */
115 int xen_pirq_from_irq(unsigned irq);
117 /* Return the irq allocated to the gsi */
118 int xen_irq_from_gsi(unsigned gsi);
120 /* Determine whether to ignore this IRQ if it is passed to a guest. */
121 int xen_test_irq_shared(int irq);
123 /* initialize Xen IRQ subsystem */
124 void xen_init_IRQ(void);
125 #endif /* _XEN_EVENTS_H */