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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);
David Vrabel77bb3df2015-05-19 18:40:49 +010020int bind_virq_to_irq(unsigned int virq, unsigned int cpu, bool percpu);
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);
Juergen Gross854072d2014-08-28 06:44:09 +020031int bind_interdomain_evtchn_to_irq(unsigned int remote_domain,
32 unsigned int remote_port);
Ian Campbell2e820f52009-02-09 12:05:50 -080033int 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);
Jeremy Fitzhardingee46cdb62007-07-17 18:37:05 -070039
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
David Vrabel6ccecb02013-09-23 12:47:26 +010047#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
Daniel De Graaf420eb552011-10-27 17:58:47 -040052/*
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
Jeremy Fitzhardingef87e4ca2007-07-17 18:37:06 -070059void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector);
Jeremy Fitzhardingeeb1e3052008-05-26 23:31:23 +010060void rebind_evtchn_irq(int evtchn, int irq);
Anoob Somanc48f64a2017-06-07 12:46:56 +010061int xen_rebind_evtchn_to_cpu(int evtchn, unsigned tcpu);
Jeremy Fitzhardingef87e4ca2007-07-17 18:37:06 -070062
Jeremy Fitzhardingee46cdb62007-07-17 18:37:05 -070063static inline void notify_remote_via_evtchn(int port)
64{
65 struct evtchn_send send = { .port = port };
66 (void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send);
67}
68
Ian Campbell76465b22011-03-10 16:08:05 +000069void notify_remote_via_irq(int irq);
Jeremy Fitzhardinge0e913982008-05-26 23:31:27 +010070
Ian Campbell76465b22011-03-10 16:08:05 +000071void xen_irq_resume(void);
Jeremy Fitzhardinge0e913982008-05-26 23:31:27 +010072
Jeremy Fitzhardinge2d9e1e22008-07-07 12:07:53 -070073/* Clear an irq's pending state, in preparation for polling on it */
74void xen_clear_irq_pending(int irq);
Jeremy Fitzhardinge168d2f42008-08-20 17:02:18 -070075void xen_set_irq_pending(int irq);
76bool xen_test_irq_pending(int irq);
Jeremy Fitzhardinge2d9e1e22008-07-07 12:07:53 -070077
78/* Poll waiting for an irq to become pending. In the usual case, the
79 irq will be disabled so it won't deliver an interrupt. */
80void xen_poll_irq(int irq);
81
Konrad Rzeszutek Wilkd9a88142009-11-05 16:33:09 -050082/* Poll waiting for an irq to become pending with a timeout. In the usual case,
83 * the irq will be disabled so it won't deliver an interrupt. */
84void xen_poll_irq_timeout(int irq, u64 timeout);
85
Ian Campbelld4c04532009-02-06 19:20:31 -080086/* Determine the IRQ which is bound to an event channel */
87unsigned irq_from_evtchn(unsigned int evtchn);
David Vrabel9a489f42013-03-13 15:29:25 +000088int irq_from_virq(unsigned int cpu, unsigned int virq);
89unsigned int evtchn_from_irq(unsigned irq);
Ian Campbelld4c04532009-02-06 19:20:31 -080090
Sheng Yang38e20b02010-05-14 12:40:51 +010091/* Xen HVM evtchn vector callback */
Ian Campbell76465b22011-03-10 16:08:05 +000092void xen_hvm_callback_vector(void);
Seiji Aguchicf910e82013-06-20 11:46:53 -040093#ifdef CONFIG_TRACING
94#define trace_xen_hvm_callback_vector xen_hvm_callback_vector
95#endif
Sheng Yang38e20b02010-05-14 12:40:51 +010096int xen_set_callback_via(uint64_t via);
97void xen_evtchn_do_upcall(struct pt_regs *regs);
98void xen_hvm_evtchn_do_upcall(void);
99
Ian Campbellf4d06352011-03-10 16:08:07 +0000100/* 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);
Qing Hef731e3ef2010-10-11 15:30:09 +0100103
104#ifdef CONFIG_PCI_MSI
Ian Campbellf4d06352011-03-10 16:08:07 +0000105/* Allocate a pirq for a MSI style physical interrupt. */
Ian Campbellbf480d92011-02-18 16:43:32 +0000106int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc);
Ian Campbellf4d06352011-03-10 16:08:07 +0000107/* Bind an PSI pirq to an irq. */
Ian Campbellbf480d92011-02-18 16:43:32 +0000108int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc,
Roger Pau Monne4892c9b2014-02-27 19:15:35 +0100109 int pirq, int nvec, const char *name, domid_t domid);
Qing Hef731e3ef2010-10-11 15:30:09 +0100110#endif
Jeremy Fitzhardinged46a78b2010-10-01 12:20:09 -0400111
Alex Nixonb5401a92010-03-18 16:31:34 -0400112/* De-allocates the above mentioned physical interrupt. */
113int xen_destroy_irq(int irq);
114
Stefano Stabelliniaf42b8d2010-12-01 14:51:44 +0000115/* Return irq from pirq */
116int xen_irq_from_pirq(unsigned pirq);
117
Konrad Rzeszutek Wilke6197ac2011-02-24 14:20:12 -0500118/* Return the pirq allocated to the irq. */
119int xen_pirq_from_irq(unsigned irq);
120
Stefano Stabellini68c2c392012-05-21 16:54:10 +0100121/* Return the irq allocated to the gsi */
122int xen_irq_from_gsi(unsigned gsi);
123
Konrad Rzeszutek Wilkc7c2c3a2010-11-08 14:26:36 -0500124/* Determine whether to ignore this IRQ if it is passed to a guest. */
125int xen_test_irq_shared(int irq);
126
Stefano Stabellini0ec53ec2012-09-14 13:37:32 +0000127/* initialize Xen IRQ subsystem */
128void xen_init_IRQ(void);
Jeremy Fitzhardingee46cdb62007-07-17 18:37:05 -0700129#endif /* _XEN_EVENTS_H */