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(evtchn_port_t evtchn);
16 int bind_evtchn_to_irq_lateeoi(evtchn_port_t evtchn);
17 int bind_evtchn_to_irqhandler(evtchn_port_t evtchn,
18 irq_handler_t handler,
19 unsigned long irqflags, const char *devname,
21 int bind_evtchn_to_irqhandler_lateeoi(evtchn_port_t evtchn,
22 irq_handler_t handler,
23 unsigned long irqflags, const char *devname,
25 int bind_virq_to_irq(unsigned int virq, unsigned int cpu, bool percpu);
26 int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu,
27 irq_handler_t handler,
28 unsigned long irqflags, const char *devname,
30 int bind_ipi_to_irqhandler(enum ipi_vector ipi,
32 irq_handler_t handler,
33 unsigned long irqflags,
36 int bind_interdomain_evtchn_to_irq(unsigned int remote_domain,
37 evtchn_port_t remote_port);
38 int bind_interdomain_evtchn_to_irq_lateeoi(unsigned int remote_domain,
39 evtchn_port_t remote_port);
40 int bind_interdomain_evtchn_to_irqhandler(unsigned int remote_domain,
41 evtchn_port_t remote_port,
42 irq_handler_t handler,
43 unsigned long irqflags,
46 int bind_interdomain_evtchn_to_irqhandler_lateeoi(unsigned int remote_domain,
47 evtchn_port_t remote_port,
48 irq_handler_t handler,
49 unsigned long irqflags,
54 * Common unbind function for all event sources. Takes IRQ to unbind from.
55 * Automatically closes the underlying event channel (even for bindings
56 * made with bind_evtchn_to_irqhandler()).
58 void unbind_from_irqhandler(unsigned int irq, void *dev_id);
61 * Send late EOI for an IRQ bound to an event channel via one of the *_lateeoi
64 void xen_irq_lateeoi(unsigned int irq, unsigned int eoi_flags);
65 /* Signal an event was spurious, i.e. there was no action resulting from it. */
66 #define XEN_EOI_FLAG_SPURIOUS 0x00000001
68 #define XEN_IRQ_PRIORITY_MAX EVTCHN_FIFO_PRIORITY_MAX
69 #define XEN_IRQ_PRIORITY_DEFAULT EVTCHN_FIFO_PRIORITY_DEFAULT
70 #define XEN_IRQ_PRIORITY_MIN EVTCHN_FIFO_PRIORITY_MIN
71 int xen_set_irq_priority(unsigned irq, unsigned priority);
74 * Allow extra references to event channels exposed to userspace by evtchn
76 int evtchn_make_refcounted(unsigned int evtchn);
77 int evtchn_get(unsigned int evtchn);
78 void evtchn_put(unsigned int evtchn);
80 void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector);
81 void rebind_evtchn_irq(int evtchn, int irq);
83 static inline void notify_remote_via_evtchn(int port)
85 struct evtchn_send send = { .port = port };
86 (void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send);
89 void notify_remote_via_irq(int irq);
91 void xen_irq_resume(void);
93 /* Clear an irq's pending state, in preparation for polling on it */
94 void xen_clear_irq_pending(int irq);
95 void xen_set_irq_pending(int irq);
96 bool xen_test_irq_pending(int irq);
98 /* Poll waiting for an irq to become pending. In the usual case, the
99 irq will be disabled so it won't deliver an interrupt. */
100 void xen_poll_irq(int irq);
102 /* Poll waiting for an irq to become pending with a timeout. In the usual case,
103 * the irq will be disabled so it won't deliver an interrupt. */
104 void xen_poll_irq_timeout(int irq, u64 timeout);
106 /* Determine the IRQ which is bound to an event channel */
107 unsigned irq_from_evtchn(unsigned int evtchn);
108 int irq_from_virq(unsigned int cpu, unsigned int virq);
109 unsigned int evtchn_from_irq(unsigned irq);
111 /* Xen HVM evtchn vector callback */
112 void xen_hvm_callback_vector(void);
113 #ifdef CONFIG_TRACING
114 #define trace_xen_hvm_callback_vector xen_hvm_callback_vector
116 int xen_set_callback_via(uint64_t via);
117 void xen_evtchn_do_upcall(struct pt_regs *regs);
118 void xen_hvm_evtchn_do_upcall(void);
120 /* Bind a pirq for a physical interrupt to an irq. */
121 int xen_bind_pirq_gsi_to_irq(unsigned gsi,
122 unsigned pirq, int shareable, char *name);
124 #ifdef CONFIG_PCI_MSI
125 /* Allocate a pirq for a MSI style physical interrupt. */
126 int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc);
127 /* Bind an PSI pirq to an irq. */
128 int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc,
129 int pirq, int nvec, const char *name, domid_t domid);
132 /* De-allocates the above mentioned physical interrupt. */
133 int xen_destroy_irq(int irq);
135 /* Return irq from pirq */
136 int xen_irq_from_pirq(unsigned pirq);
138 /* Return the pirq allocated to the irq. */
139 int xen_pirq_from_irq(unsigned irq);
141 /* Return the irq allocated to the gsi */
142 int xen_irq_from_gsi(unsigned gsi);
144 /* Determine whether to ignore this IRQ if it is passed to a guest. */
145 int xen_test_irq_shared(int irq);
147 /* initialize Xen IRQ subsystem */
148 void xen_init_IRQ(void);
149 #endif /* _XEN_EVENTS_H */