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Jeremy Fitzhardingee46cdb62007-07-17 18:37:05 -07001#ifndef _XEN_EVENTS_H
2#define _XEN_EVENTS_H
3
Jeremy Fitzhardingef87e4ca2007-07-17 18:37:06 -07004#include <linux/interrupt.h>
5
6#include <xen/interface/event_channel.h>
7#include <asm/xen/hypercall.h>
Isaku Yamahatae849c3e2008-04-02 10:53:56 -07008#include <asm/xen/events.h>
Jeremy Fitzhardingee46cdb62007-07-17 18:37:05 -07009
Jeremy Fitzhardingeb536b4b2007-07-17 18:37:06 -070010int bind_evtchn_to_irq(unsigned int evtchn);
Jeremy Fitzhardingee46cdb62007-07-17 18:37:05 -070011int bind_evtchn_to_irqhandler(unsigned int evtchn,
Jeremy Fitzhardingef87e4ca2007-07-17 18:37:06 -070012 irq_handler_t handler,
Jeremy Fitzhardingee46cdb62007-07-17 18:37:05 -070013 unsigned long irqflags, const char *devname,
14 void *dev_id);
Jeremy Fitzhardinge4fe7d5a2010-09-02 16:17:06 +010015int bind_virq_to_irq(unsigned int virq, unsigned int cpu);
Jeremy Fitzhardingee46cdb62007-07-17 18:37:05 -070016int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu,
Jeremy Fitzhardingef87e4ca2007-07-17 18:37:06 -070017 irq_handler_t handler,
18 unsigned long irqflags, const char *devname,
19 void *dev_id);
20int bind_ipi_to_irqhandler(enum ipi_vector ipi,
21 unsigned int cpu,
22 irq_handler_t handler,
23 unsigned long irqflags,
24 const char *devname,
25 void *dev_id);
Jeremy Fitzhardingee46cdb62007-07-17 18:37:05 -070026
27/*
28 * Common unbind function for all event sources. Takes IRQ to unbind from.
29 * Automatically closes the underlying event channel (even for bindings
30 * made with bind_evtchn_to_irqhandler()).
31 */
32void unbind_from_irqhandler(unsigned int irq, void *dev_id);
33
Jeremy Fitzhardingef87e4ca2007-07-17 18:37:06 -070034void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector);
Isaku Yamahata642e0c82008-04-02 10:53:57 -070035int resend_irq_on_evtchn(unsigned int irq);
Jeremy Fitzhardingeeb1e3052008-05-26 23:31:23 +010036void rebind_evtchn_irq(int evtchn, int irq);
Jeremy Fitzhardingef87e4ca2007-07-17 18:37:06 -070037
Jeremy Fitzhardingee46cdb62007-07-17 18:37:05 -070038static inline void notify_remote_via_evtchn(int port)
39{
40 struct evtchn_send send = { .port = port };
41 (void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send);
42}
43
44extern void notify_remote_via_irq(int irq);
Jeremy Fitzhardinge0e913982008-05-26 23:31:27 +010045
46extern void xen_irq_resume(void);
47
Jeremy Fitzhardinge2d9e1e22008-07-07 12:07:53 -070048/* Clear an irq's pending state, in preparation for polling on it */
49void xen_clear_irq_pending(int irq);
Jeremy Fitzhardinge168d2f42008-08-20 17:02:18 -070050void xen_set_irq_pending(int irq);
51bool xen_test_irq_pending(int irq);
Jeremy Fitzhardinge2d9e1e22008-07-07 12:07:53 -070052
53/* Poll waiting for an irq to become pending. In the usual case, the
54 irq will be disabled so it won't deliver an interrupt. */
55void xen_poll_irq(int irq);
56
Konrad Rzeszutek Wilkd9a88142009-11-05 16:33:09 -050057/* Poll waiting for an irq to become pending with a timeout. In the usual case,
58 * the irq will be disabled so it won't deliver an interrupt. */
59void xen_poll_irq_timeout(int irq, u64 timeout);
60
Ian Campbelld4c04532009-02-06 19:20:31 -080061/* Determine the IRQ which is bound to an event channel */
62unsigned irq_from_evtchn(unsigned int evtchn);
63
Sheng Yang38e20b02010-05-14 12:40:51 +010064/* Xen HVM evtchn vector callback */
65extern void xen_hvm_callback_vector(void);
66extern int xen_have_vector_callback;
67int xen_set_callback_via(uint64_t via);
68void xen_evtchn_do_upcall(struct pt_regs *regs);
69void xen_hvm_evtchn_do_upcall(void);
70
Jeremy Fitzhardinged46a78b2010-10-01 12:20:09 -040071/* Allocate an irq for a physical interrupt, given a gsi. "Legacy"
72 * GSIs are identity mapped; others are dynamically allocated as
73 * usual. */
Konrad Rzeszutek Wilk15ebbb82010-10-04 13:43:27 -040074int xen_allocate_pirq(unsigned gsi, int shareable, char *name);
Stefano Stabellini7a043f12010-07-01 17:08:14 +010075int xen_map_pirq_gsi(unsigned pirq, unsigned gsi, int shareable, char *name);
Qing Hef731e3ef2010-10-11 15:30:09 +010076
77#ifdef CONFIG_PCI_MSI
Stefano Stabellini809f9262010-07-01 17:10:39 +010078/* Allocate an irq and a pirq to be used with MSIs. */
79void xen_allocate_pirq_msi(char *name, int *irq, int *pirq);
Qing Hef731e3ef2010-10-11 15:30:09 +010080int xen_create_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc, int type);
81#endif
Jeremy Fitzhardinged46a78b2010-10-01 12:20:09 -040082
Alex Nixonb5401a92010-03-18 16:31:34 -040083/* De-allocates the above mentioned physical interrupt. */
84int xen_destroy_irq(int irq);
85
Jeremy Fitzhardinged46a78b2010-10-01 12:20:09 -040086/* Return vector allocated to pirq */
87int xen_vector_from_irq(unsigned pirq);
88
89/* Return gsi allocated to pirq */
90int xen_gsi_from_irq(unsigned pirq);
91
Jeremy Fitzhardingee46cdb62007-07-17 18:37:05 -070092#endif /* _XEN_EVENTS_H */