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Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +01001/* SPDX-License-Identifier: GPL-2.0 */
Jeremy Fitzhardingee46cdb62007-07-17 18:37:05 -07002#ifndef _XEN_EVENTS_H
3#define _XEN_EVENTS_H
4
Jeremy Fitzhardingef87e4ca2007-07-17 18:37:06 -07005#include <linux/interrupt.h>
Juergen Gross93774aa2019-06-21 20:47:03 +02006#include <linux/irq.h>
Roger Pau Monne4892c9b2014-02-27 19:15:35 +01007#ifdef CONFIG_PCI_MSI
8#include <linux/msi.h>
9#endif
Jeremy Fitzhardingef87e4ca2007-07-17 18:37:06 -070010
11#include <xen/interface/event_channel.h>
12#include <asm/xen/hypercall.h>
Isaku Yamahatae849c3e2008-04-02 10:53:56 -070013#include <asm/xen/events.h>
Jeremy Fitzhardingee46cdb62007-07-17 18:37:05 -070014
David Vrabel0dc00642013-09-23 21:03:38 +010015unsigned xen_evtchn_nr_channels(void);
16
Juergen Grossb454e8e2020-11-03 15:29:02 +010017int bind_evtchn_to_irq(evtchn_port_t evtchn);
18int bind_evtchn_to_irq_lateeoi(evtchn_port_t evtchn);
19int bind_evtchn_to_irqhandler(evtchn_port_t evtchn,
Jeremy Fitzhardingef87e4ca2007-07-17 18:37:06 -070020 irq_handler_t handler,
Jeremy Fitzhardingee46cdb62007-07-17 18:37:05 -070021 unsigned long irqflags, const char *devname,
22 void *dev_id);
Juergen Grossb454e8e2020-11-03 15:29:02 +010023int bind_evtchn_to_irqhandler_lateeoi(evtchn_port_t evtchn,
24 irq_handler_t handler,
25 unsigned long irqflags, const char *devname,
26 void *dev_id);
David Vrabel77bb3df2015-05-19 18:40:49 +010027int bind_virq_to_irq(unsigned int virq, unsigned int cpu, bool percpu);
Jeremy Fitzhardingee46cdb62007-07-17 18:37:05 -070028int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu,
Jeremy Fitzhardingef87e4ca2007-07-17 18:37:06 -070029 irq_handler_t handler,
30 unsigned long irqflags, const char *devname,
31 void *dev_id);
32int bind_ipi_to_irqhandler(enum ipi_vector ipi,
33 unsigned int cpu,
34 irq_handler_t handler,
35 unsigned long irqflags,
36 const char *devname,
37 void *dev_id);
Juergen Gross854072d2014-08-28 06:44:09 +020038int bind_interdomain_evtchn_to_irq(unsigned int remote_domain,
Juergen Grossb454e8e2020-11-03 15:29:02 +010039 evtchn_port_t remote_port);
40int bind_interdomain_evtchn_to_irq_lateeoi(unsigned int remote_domain,
41 evtchn_port_t remote_port);
Ian Campbell2e820f52009-02-09 12:05:50 -080042int bind_interdomain_evtchn_to_irqhandler(unsigned int remote_domain,
Juergen Grossb454e8e2020-11-03 15:29:02 +010043 evtchn_port_t remote_port,
Ian Campbell2e820f52009-02-09 12:05:50 -080044 irq_handler_t handler,
45 unsigned long irqflags,
46 const char *devname,
47 void *dev_id);
Juergen Grossb454e8e2020-11-03 15:29:02 +010048int bind_interdomain_evtchn_to_irqhandler_lateeoi(unsigned int remote_domain,
49 evtchn_port_t remote_port,
50 irq_handler_t handler,
51 unsigned long irqflags,
52 const char *devname,
53 void *dev_id);
Jeremy Fitzhardingee46cdb62007-07-17 18:37:05 -070054
55/*
56 * Common unbind function for all event sources. Takes IRQ to unbind from.
57 * Automatically closes the underlying event channel (even for bindings
58 * made with bind_evtchn_to_irqhandler()).
59 */
60void unbind_from_irqhandler(unsigned int irq, void *dev_id);
61
Juergen Grossb454e8e2020-11-03 15:29:02 +010062/*
63 * Send late EOI for an IRQ bound to an event channel via one of the *_lateeoi
64 * functions above.
65 */
66void xen_irq_lateeoi(unsigned int irq, unsigned int eoi_flags);
67/* Signal an event was spurious, i.e. there was no action resulting from it. */
68#define XEN_EOI_FLAG_SPURIOUS 0x00000001
69
David Vrabel6ccecb02013-09-23 12:47:26 +010070#define XEN_IRQ_PRIORITY_MAX EVTCHN_FIFO_PRIORITY_MAX
71#define XEN_IRQ_PRIORITY_DEFAULT EVTCHN_FIFO_PRIORITY_DEFAULT
72#define XEN_IRQ_PRIORITY_MIN EVTCHN_FIFO_PRIORITY_MIN
73int xen_set_irq_priority(unsigned irq, unsigned priority);
74
Daniel De Graaf420eb552011-10-27 17:58:47 -040075/*
76 * Allow extra references to event channels exposed to userspace by evtchn
77 */
78int evtchn_make_refcounted(unsigned int evtchn);
79int evtchn_get(unsigned int evtchn);
80void evtchn_put(unsigned int evtchn);
81
Jeremy Fitzhardingef87e4ca2007-07-17 18:37:06 -070082void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector);
Jeremy Fitzhardingeeb1e3052008-05-26 23:31:23 +010083void rebind_evtchn_irq(int evtchn, int irq);
Juergen Gross93774aa2019-06-21 20:47:03 +020084int xen_set_affinity_evtchn(struct irq_desc *desc, unsigned int tcpu);
Jeremy Fitzhardingef87e4ca2007-07-17 18:37:06 -070085
Jeremy Fitzhardingee46cdb62007-07-17 18:37:05 -070086static inline void notify_remote_via_evtchn(int port)
87{
88 struct evtchn_send send = { .port = port };
89 (void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send);
90}
91
Ian Campbell76465b22011-03-10 16:08:05 +000092void notify_remote_via_irq(int irq);
Jeremy Fitzhardinge0e913982008-05-26 23:31:27 +010093
Ian Campbell76465b22011-03-10 16:08:05 +000094void xen_irq_resume(void);
Jeremy Fitzhardinge0e913982008-05-26 23:31:27 +010095
Jeremy Fitzhardinge2d9e1e22008-07-07 12:07:53 -070096/* Clear an irq's pending state, in preparation for polling on it */
97void xen_clear_irq_pending(int irq);
Jeremy Fitzhardinge168d2f42008-08-20 17:02:18 -070098void xen_set_irq_pending(int irq);
99bool xen_test_irq_pending(int irq);
Jeremy Fitzhardinge2d9e1e22008-07-07 12:07:53 -0700100
101/* Poll waiting for an irq to become pending. In the usual case, the
102 irq will be disabled so it won't deliver an interrupt. */
103void xen_poll_irq(int irq);
104
Konrad Rzeszutek Wilkd9a88142009-11-05 16:33:09 -0500105/* Poll waiting for an irq to become pending with a timeout. In the usual case,
106 * the irq will be disabled so it won't deliver an interrupt. */
107void xen_poll_irq_timeout(int irq, u64 timeout);
108
Ian Campbelld4c04532009-02-06 19:20:31 -0800109/* Determine the IRQ which is bound to an event channel */
110unsigned irq_from_evtchn(unsigned int evtchn);
David Vrabel9a489f42013-03-13 15:29:25 +0000111int irq_from_virq(unsigned int cpu, unsigned int virq);
112unsigned int evtchn_from_irq(unsigned irq);
Ian Campbelld4c04532009-02-06 19:20:31 -0800113
Sheng Yang38e20b02010-05-14 12:40:51 +0100114/* Xen HVM evtchn vector callback */
Ian Campbell76465b22011-03-10 16:08:05 +0000115void xen_hvm_callback_vector(void);
Seiji Aguchicf910e82013-06-20 11:46:53 -0400116#ifdef CONFIG_TRACING
117#define trace_xen_hvm_callback_vector xen_hvm_callback_vector
118#endif
Sheng Yang38e20b02010-05-14 12:40:51 +0100119int xen_set_callback_via(uint64_t via);
120void xen_evtchn_do_upcall(struct pt_regs *regs);
121void xen_hvm_evtchn_do_upcall(void);
122
Ian Campbellf4d06352011-03-10 16:08:07 +0000123/* Bind a pirq for a physical interrupt to an irq. */
124int xen_bind_pirq_gsi_to_irq(unsigned gsi,
125 unsigned pirq, int shareable, char *name);
Qing Hef731e3ef2010-10-11 15:30:09 +0100126
127#ifdef CONFIG_PCI_MSI
Ian Campbellf4d06352011-03-10 16:08:07 +0000128/* Allocate a pirq for a MSI style physical interrupt. */
Ian Campbellbf480d92011-02-18 16:43:32 +0000129int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc);
Ian Campbellf4d06352011-03-10 16:08:07 +0000130/* Bind an PSI pirq to an irq. */
Ian Campbellbf480d92011-02-18 16:43:32 +0000131int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc,
Roger Pau Monne4892c9b2014-02-27 19:15:35 +0100132 int pirq, int nvec, const char *name, domid_t domid);
Qing Hef731e3ef2010-10-11 15:30:09 +0100133#endif
Jeremy Fitzhardinged46a78b2010-10-01 12:20:09 -0400134
Alex Nixonb5401a92010-03-18 16:31:34 -0400135/* De-allocates the above mentioned physical interrupt. */
136int xen_destroy_irq(int irq);
137
Stefano Stabelliniaf42b8d2010-12-01 14:51:44 +0000138/* Return irq from pirq */
139int xen_irq_from_pirq(unsigned pirq);
140
Konrad Rzeszutek Wilke6197ac2011-02-24 14:20:12 -0500141/* Return the pirq allocated to the irq. */
142int xen_pirq_from_irq(unsigned irq);
143
Stefano Stabellini68c2c392012-05-21 16:54:10 +0100144/* Return the irq allocated to the gsi */
145int xen_irq_from_gsi(unsigned gsi);
146
Konrad Rzeszutek Wilkc7c2c3a2010-11-08 14:26:36 -0500147/* Determine whether to ignore this IRQ if it is passed to a guest. */
148int xen_test_irq_shared(int irq);
149
Stefano Stabellini0ec53ec2012-09-14 13:37:32 +0000150/* initialize Xen IRQ subsystem */
151void xen_init_IRQ(void);
Jeremy Fitzhardingee46cdb62007-07-17 18:37:05 -0700152#endif /* _XEN_EVENTS_H */