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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>
Roger Pau Monne4892c9b2014-02-27 19:15:35 +01005#ifdef CONFIG_PCI_MSI
6#include <linux/msi.h>
7#endif
Jeremy Fitzhardingef87e4ca2007-07-17 18:37:06 -07008
9#include <xen/interface/event_channel.h>
10#include <asm/xen/hypercall.h>
Isaku Yamahatae849c3e2008-04-02 10:53:56 -070011#include <asm/xen/events.h>
Jeremy Fitzhardingee46cdb62007-07-17 18:37:05 -070012
David Vrabel0dc00642013-09-23 21:03:38 +010013unsigned xen_evtchn_nr_channels(void);
14
Jeremy Fitzhardingeb536b4b2007-07-17 18:37:06 -070015int bind_evtchn_to_irq(unsigned int evtchn);
Jeremy Fitzhardingee46cdb62007-07-17 18:37:05 -070016int bind_evtchn_to_irqhandler(unsigned int evtchn,
Jeremy Fitzhardingef87e4ca2007-07-17 18:37:06 -070017 irq_handler_t handler,
Jeremy Fitzhardingee46cdb62007-07-17 18:37:05 -070018 unsigned long irqflags, const char *devname,
19 void *dev_id);
Jeremy Fitzhardinge4fe7d5a2010-09-02 16:17:06 +010020int bind_virq_to_irq(unsigned int virq, unsigned int cpu);
Jeremy Fitzhardingee46cdb62007-07-17 18:37:05 -070021int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu,
Jeremy Fitzhardingef87e4ca2007-07-17 18:37:06 -070022 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);
Ian Campbell2e820f52009-02-09 12:05:50 -080031int bind_interdomain_evtchn_to_irqhandler(unsigned int remote_domain,
32 unsigned int remote_port,
33 irq_handler_t handler,
34 unsigned long irqflags,
35 const char *devname,
36 void *dev_id);
Jeremy Fitzhardingee46cdb62007-07-17 18:37:05 -070037
38/*
39 * Common unbind function for all event sources. Takes IRQ to unbind from.
40 * Automatically closes the underlying event channel (even for bindings
41 * made with bind_evtchn_to_irqhandler()).
42 */
43void unbind_from_irqhandler(unsigned int irq, void *dev_id);
44
David Vrabel6ccecb02013-09-23 12:47:26 +010045#define XEN_IRQ_PRIORITY_MAX EVTCHN_FIFO_PRIORITY_MAX
46#define XEN_IRQ_PRIORITY_DEFAULT EVTCHN_FIFO_PRIORITY_DEFAULT
47#define XEN_IRQ_PRIORITY_MIN EVTCHN_FIFO_PRIORITY_MIN
48int xen_set_irq_priority(unsigned irq, unsigned priority);
49
Daniel De Graaf420eb552011-10-27 17:58:47 -040050/*
51 * Allow extra references to event channels exposed to userspace by evtchn
52 */
53int evtchn_make_refcounted(unsigned int evtchn);
54int evtchn_get(unsigned int evtchn);
55void evtchn_put(unsigned int evtchn);
56
Jeremy Fitzhardingef87e4ca2007-07-17 18:37:06 -070057void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector);
Jeremy Fitzhardingeeb1e3052008-05-26 23:31:23 +010058void rebind_evtchn_irq(int evtchn, int irq);
Jeremy Fitzhardingef87e4ca2007-07-17 18:37:06 -070059
Jeremy Fitzhardingee46cdb62007-07-17 18:37:05 -070060static inline void notify_remote_via_evtchn(int port)
61{
62 struct evtchn_send send = { .port = port };
63 (void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send);
64}
65
Ian Campbell76465b22011-03-10 16:08:05 +000066void notify_remote_via_irq(int irq);
Jeremy Fitzhardinge0e913982008-05-26 23:31:27 +010067
Ian Campbell76465b22011-03-10 16:08:05 +000068void xen_irq_resume(void);
Jeremy Fitzhardinge0e913982008-05-26 23:31:27 +010069
Jeremy Fitzhardinge2d9e1e22008-07-07 12:07:53 -070070/* Clear an irq's pending state, in preparation for polling on it */
71void xen_clear_irq_pending(int irq);
Jeremy Fitzhardinge168d2f42008-08-20 17:02:18 -070072void xen_set_irq_pending(int irq);
73bool xen_test_irq_pending(int irq);
Jeremy Fitzhardinge2d9e1e22008-07-07 12:07:53 -070074
75/* Poll waiting for an irq to become pending. In the usual case, the
76 irq will be disabled so it won't deliver an interrupt. */
77void xen_poll_irq(int irq);
78
Konrad Rzeszutek Wilkd9a88142009-11-05 16:33:09 -050079/* Poll waiting for an irq to become pending with a timeout. In the usual case,
80 * the irq will be disabled so it won't deliver an interrupt. */
81void xen_poll_irq_timeout(int irq, u64 timeout);
82
Ian Campbelld4c04532009-02-06 19:20:31 -080083/* Determine the IRQ which is bound to an event channel */
84unsigned irq_from_evtchn(unsigned int evtchn);
David Vrabel9a489f42013-03-13 15:29:25 +000085int irq_from_virq(unsigned int cpu, unsigned int virq);
86unsigned int evtchn_from_irq(unsigned irq);
Ian Campbelld4c04532009-02-06 19:20:31 -080087
Sheng Yang38e20b02010-05-14 12:40:51 +010088/* Xen HVM evtchn vector callback */
Ian Campbell76465b22011-03-10 16:08:05 +000089void xen_hvm_callback_vector(void);
Seiji Aguchicf910e82013-06-20 11:46:53 -040090#ifdef CONFIG_TRACING
91#define trace_xen_hvm_callback_vector xen_hvm_callback_vector
92#endif
Sheng Yang38e20b02010-05-14 12:40:51 +010093extern int xen_have_vector_callback;
94int xen_set_callback_via(uint64_t via);
95void xen_evtchn_do_upcall(struct pt_regs *regs);
96void xen_hvm_evtchn_do_upcall(void);
97
Ian Campbellf4d06352011-03-10 16:08:07 +000098/* Bind a pirq for a physical interrupt to an irq. */
99int xen_bind_pirq_gsi_to_irq(unsigned gsi,
100 unsigned pirq, int shareable, char *name);
Qing Hef731e3ef2010-10-11 15:30:09 +0100101
102#ifdef CONFIG_PCI_MSI
Ian Campbellf4d06352011-03-10 16:08:07 +0000103/* Allocate a pirq for a MSI style physical interrupt. */
Ian Campbellbf480d92011-02-18 16:43:32 +0000104int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc);
Ian Campbellf4d06352011-03-10 16:08:07 +0000105/* Bind an PSI pirq to an irq. */
Ian Campbellbf480d92011-02-18 16:43:32 +0000106int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc,
Roger Pau Monne4892c9b2014-02-27 19:15:35 +0100107 int pirq, int nvec, const char *name, domid_t domid);
Qing Hef731e3ef2010-10-11 15:30:09 +0100108#endif
Jeremy Fitzhardinged46a78b2010-10-01 12:20:09 -0400109
Alex Nixonb5401a92010-03-18 16:31:34 -0400110/* De-allocates the above mentioned physical interrupt. */
111int xen_destroy_irq(int irq);
112
Stefano Stabelliniaf42b8d2010-12-01 14:51:44 +0000113/* Return irq from pirq */
114int xen_irq_from_pirq(unsigned pirq);
115
Konrad Rzeszutek Wilke6197ac2011-02-24 14:20:12 -0500116/* Return the pirq allocated to the irq. */
117int xen_pirq_from_irq(unsigned irq);
118
Stefano Stabellini68c2c392012-05-21 16:54:10 +0100119/* Return the irq allocated to the gsi */
120int xen_irq_from_gsi(unsigned gsi);
121
Konrad Rzeszutek Wilkc7c2c3a2010-11-08 14:26:36 -0500122/* Determine whether to ignore this IRQ if it is passed to a guest. */
123int xen_test_irq_shared(int irq);
124
Stefano Stabellini0ec53ec2012-09-14 13:37:32 +0000125/* initialize Xen IRQ subsystem */
126void xen_init_IRQ(void);
Jeremy Fitzhardingee46cdb62007-07-17 18:37:05 -0700127#endif /* _XEN_EVENTS_H */