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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);
Ian Campbell2e820f52009-02-09 12:05:50 -080026int bind_interdomain_evtchn_to_irqhandler(unsigned int remote_domain,
27 unsigned int remote_port,
28 irq_handler_t handler,
29 unsigned long irqflags,
30 const char *devname,
31 void *dev_id);
Jeremy Fitzhardingee46cdb62007-07-17 18:37:05 -070032
33/*
34 * Common unbind function for all event sources. Takes IRQ to unbind from.
35 * Automatically closes the underlying event channel (even for bindings
36 * made with bind_evtchn_to_irqhandler()).
37 */
38void unbind_from_irqhandler(unsigned int irq, void *dev_id);
39
Daniel De Graaf420eb552011-10-27 17:58:47 -040040/*
41 * Allow extra references to event channels exposed to userspace by evtchn
42 */
43int evtchn_make_refcounted(unsigned int evtchn);
44int evtchn_get(unsigned int evtchn);
45void evtchn_put(unsigned int evtchn);
46
Jeremy Fitzhardingef87e4ca2007-07-17 18:37:06 -070047void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector);
Isaku Yamahata642e0c82008-04-02 10:53:57 -070048int resend_irq_on_evtchn(unsigned int irq);
Jeremy Fitzhardingeeb1e3052008-05-26 23:31:23 +010049void rebind_evtchn_irq(int evtchn, int irq);
Jeremy Fitzhardingef87e4ca2007-07-17 18:37:06 -070050
Jeremy Fitzhardingee46cdb62007-07-17 18:37:05 -070051static inline void notify_remote_via_evtchn(int port)
52{
53 struct evtchn_send send = { .port = port };
54 (void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send);
55}
56
Ian Campbell76465b22011-03-10 16:08:05 +000057void notify_remote_via_irq(int irq);
Jeremy Fitzhardinge0e913982008-05-26 23:31:27 +010058
Ian Campbell76465b22011-03-10 16:08:05 +000059void xen_irq_resume(void);
Jeremy Fitzhardinge0e913982008-05-26 23:31:27 +010060
Jeremy Fitzhardinge2d9e1e22008-07-07 12:07:53 -070061/* Clear an irq's pending state, in preparation for polling on it */
62void xen_clear_irq_pending(int irq);
Jeremy Fitzhardinge168d2f42008-08-20 17:02:18 -070063void xen_set_irq_pending(int irq);
64bool xen_test_irq_pending(int irq);
Jeremy Fitzhardinge2d9e1e22008-07-07 12:07:53 -070065
66/* Poll waiting for an irq to become pending. In the usual case, the
67 irq will be disabled so it won't deliver an interrupt. */
68void xen_poll_irq(int irq);
69
Konrad Rzeszutek Wilkd9a88142009-11-05 16:33:09 -050070/* Poll waiting for an irq to become pending with a timeout. In the usual case,
71 * the irq will be disabled so it won't deliver an interrupt. */
72void xen_poll_irq_timeout(int irq, u64 timeout);
73
Ian Campbelld4c04532009-02-06 19:20:31 -080074/* Determine the IRQ which is bound to an event channel */
75unsigned irq_from_evtchn(unsigned int evtchn);
76
Sheng Yang38e20b02010-05-14 12:40:51 +010077/* Xen HVM evtchn vector callback */
Ian Campbell76465b22011-03-10 16:08:05 +000078void xen_hvm_callback_vector(void);
Seiji Aguchicf910e82013-06-20 11:46:53 -040079#ifdef CONFIG_TRACING
80#define trace_xen_hvm_callback_vector xen_hvm_callback_vector
81#endif
Sheng Yang38e20b02010-05-14 12:40:51 +010082extern int xen_have_vector_callback;
83int xen_set_callback_via(uint64_t via);
84void xen_evtchn_do_upcall(struct pt_regs *regs);
85void xen_hvm_evtchn_do_upcall(void);
86
Ian Campbellf4d06352011-03-10 16:08:07 +000087/* Bind a pirq for a physical interrupt to an irq. */
88int xen_bind_pirq_gsi_to_irq(unsigned gsi,
89 unsigned pirq, int shareable, char *name);
Qing Hef731e3ef2010-10-11 15:30:09 +010090
91#ifdef CONFIG_PCI_MSI
Ian Campbellf4d06352011-03-10 16:08:07 +000092/* Allocate a pirq for a MSI style physical interrupt. */
Ian Campbellbf480d92011-02-18 16:43:32 +000093int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc);
Ian Campbellf4d06352011-03-10 16:08:07 +000094/* Bind an PSI pirq to an irq. */
Ian Campbellbf480d92011-02-18 16:43:32 +000095int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc,
Jan Beulichdec02de2013-04-03 15:52:50 +010096 int pirq, const char *name, domid_t domid);
Qing Hef731e3ef2010-10-11 15:30:09 +010097#endif
Jeremy Fitzhardinged46a78b2010-10-01 12:20:09 -040098
Alex Nixonb5401a92010-03-18 16:31:34 -040099/* De-allocates the above mentioned physical interrupt. */
100int xen_destroy_irq(int irq);
101
Stefano Stabelliniaf42b8d2010-12-01 14:51:44 +0000102/* Return irq from pirq */
103int xen_irq_from_pirq(unsigned pirq);
104
Konrad Rzeszutek Wilke6197ac2011-02-24 14:20:12 -0500105/* Return the pirq allocated to the irq. */
106int xen_pirq_from_irq(unsigned irq);
107
Stefano Stabellini68c2c392012-05-21 16:54:10 +0100108/* Return the irq allocated to the gsi */
109int xen_irq_from_gsi(unsigned gsi);
110
Konrad Rzeszutek Wilkc7c2c3a2010-11-08 14:26:36 -0500111/* Determine whether to ignore this IRQ if it is passed to a guest. */
112int xen_test_irq_shared(int irq);
113
Stefano Stabellini0ec53ec2012-09-14 13:37:32 +0000114/* initialize Xen IRQ subsystem */
115void xen_init_IRQ(void);
Jeremy Fitzhardingee46cdb62007-07-17 18:37:05 -0700116#endif /* _XEN_EVENTS_H */