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
13unsigned xen_evtchn_nr_channels(void);
14
15int bind_evtchn_to_irq(unsigned int evtchn);
16int bind_evtchn_to_irqhandler(unsigned int evtchn,
17			      irq_handler_t handler,
18			      unsigned long irqflags, const char *devname,
19			      void *dev_id);
20int bind_virq_to_irq(unsigned int virq, unsigned int cpu, bool percpu);
21int 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);
25int 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);
31int bind_interdomain_evtchn_to_irq(unsigned int remote_domain,
32				   unsigned int remote_port);
33int 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 */
45void 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
50int xen_set_irq_priority(unsigned irq, unsigned priority);
51
52/*
53 * Allow extra references to event channels exposed to userspace by evtchn
54 */
55int evtchn_make_refcounted(unsigned int evtchn);
56int evtchn_get(unsigned int evtchn);
57void evtchn_put(unsigned int evtchn);
58
59void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector);
60void rebind_evtchn_irq(int evtchn, int irq);
61
62static inline void notify_remote_via_evtchn(int port)
63{
64	struct evtchn_send send = { .port = port };
65	(void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send);
66}
67
68void notify_remote_via_irq(int irq);
69
70void xen_irq_resume(void);
71
72/* Clear an irq's pending state, in preparation for polling on it */
73void xen_clear_irq_pending(int irq);
74void xen_set_irq_pending(int irq);
75bool xen_test_irq_pending(int irq);
76
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. */
79void xen_poll_irq(int irq);
80
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. */
83void xen_poll_irq_timeout(int irq, u64 timeout);
84
85/* Determine the IRQ which is bound to an event channel */
86unsigned irq_from_evtchn(unsigned int evtchn);
87int irq_from_virq(unsigned int cpu, unsigned int virq);
88unsigned int evtchn_from_irq(unsigned irq);
89
90/* Xen HVM evtchn vector callback */
91void xen_hvm_callback_vector(void);
92#ifdef CONFIG_TRACING
93#define trace_xen_hvm_callback_vector xen_hvm_callback_vector
94#endif
95extern int xen_have_vector_callback;
96int xen_set_callback_via(uint64_t via);
97void xen_evtchn_do_upcall(struct pt_regs *regs);
98void xen_hvm_evtchn_do_upcall(void);
99
100/* Bind a pirq for a physical interrupt to an irq. */
101int 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. */
106int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc);
107/* Bind an PSI pirq to an irq. */
108int 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. */
113int xen_destroy_irq(int irq);
114
115/* Return irq from pirq */
116int xen_irq_from_pirq(unsigned pirq);
117
118/* Return the pirq allocated to the irq. */
119int xen_pirq_from_irq(unsigned irq);
120
121/* Return the irq allocated to the gsi */
122int xen_irq_from_gsi(unsigned gsi);
123
124/* Determine whether to ignore this IRQ if it is passed to a guest. */
125int xen_test_irq_shared(int irq);
126
127/* initialize Xen IRQ subsystem */
128void xen_init_IRQ(void);
129#endif	/* _XEN_EVENTS_H */
130