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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _XEN_EVENTS_H
3#define _XEN_EVENTS_H
4
5#include <linux/interrupt.h>
6#include <linux/irq.h>
7#ifdef CONFIG_PCI_MSI
8#include <linux/msi.h>
9#endif
10
11#include <xen/interface/event_channel.h>
12#include <asm/xen/hypercall.h>
13#include <asm/xen/events.h>
14
15unsigned xen_evtchn_nr_channels(void);
16
17int bind_evtchn_to_irq(evtchn_port_t evtchn);
18int bind_evtchn_to_irqhandler(evtchn_port_t evtchn,
19 irq_handler_t handler,
20 unsigned long irqflags, const char *devname,
21 void *dev_id);
22int bind_virq_to_irq(unsigned int virq, unsigned int cpu, bool percpu);
23int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu,
24 irq_handler_t handler,
25 unsigned long irqflags, const char *devname,
26 void *dev_id);
27int bind_ipi_to_irqhandler(enum ipi_vector ipi,
28 unsigned int cpu,
29 irq_handler_t handler,
30 unsigned long irqflags,
31 const char *devname,
32 void *dev_id);
33int bind_interdomain_evtchn_to_irq(unsigned int remote_domain,
34 evtchn_port_t remote_port);
35int bind_interdomain_evtchn_to_irqhandler(unsigned int remote_domain,
36 evtchn_port_t remote_port,
37 irq_handler_t handler,
38 unsigned long irqflags,
39 const char *devname,
40 void *dev_id);
41
42/*
43 * Common unbind function for all event sources. Takes IRQ to unbind from.
44 * Automatically closes the underlying event channel (even for bindings
45 * made with bind_evtchn_to_irqhandler()).
46 */
47void unbind_from_irqhandler(unsigned int irq, void *dev_id);
48
49#define XEN_IRQ_PRIORITY_MAX EVTCHN_FIFO_PRIORITY_MAX
50#define XEN_IRQ_PRIORITY_DEFAULT EVTCHN_FIFO_PRIORITY_DEFAULT
51#define XEN_IRQ_PRIORITY_MIN EVTCHN_FIFO_PRIORITY_MIN
52int xen_set_irq_priority(unsigned irq, unsigned priority);
53
54/*
55 * Allow extra references to event channels exposed to userspace by evtchn
56 */
57int evtchn_make_refcounted(evtchn_port_t evtchn);
58int evtchn_get(evtchn_port_t evtchn);
59void evtchn_put(evtchn_port_t evtchn);
60
61void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector);
62void rebind_evtchn_irq(evtchn_port_t evtchn, int irq);
63int xen_set_affinity_evtchn(struct irq_desc *desc, unsigned int tcpu);
64
65static inline void notify_remote_via_evtchn(evtchn_port_t port)
66{
67 struct evtchn_send send = { .port = port };
68 (void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send);
69}
70
71void notify_remote_via_irq(int irq);
72
73void xen_irq_resume(void);
74
75/* Clear an irq's pending state, in preparation for polling on it */
76void xen_clear_irq_pending(int irq);
77void xen_set_irq_pending(int irq);
78bool xen_test_irq_pending(int irq);
79
80/* Poll waiting for an irq to become pending. In the usual case, the
81 irq will be disabled so it won't deliver an interrupt. */
82void xen_poll_irq(int irq);
83
84/* Poll waiting for an irq to become pending with a timeout. In the usual case,
85 * the irq will be disabled so it won't deliver an interrupt. */
86void xen_poll_irq_timeout(int irq, u64 timeout);
87
88/* Determine the IRQ which is bound to an event channel */
89unsigned int irq_from_evtchn(evtchn_port_t evtchn);
90int irq_from_virq(unsigned int cpu, unsigned int virq);
91evtchn_port_t evtchn_from_irq(unsigned irq);
92
93int xen_set_callback_via(uint64_t via);
94void xen_evtchn_do_upcall(struct pt_regs *regs);
95void xen_hvm_evtchn_do_upcall(void);
96
97/* Bind a pirq for a physical interrupt to an irq. */
98int xen_bind_pirq_gsi_to_irq(unsigned gsi,
99 unsigned pirq, int shareable, char *name);
100
101#ifdef CONFIG_PCI_MSI
102/* Allocate a pirq for a MSI style physical interrupt. */
103int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc);
104/* Bind an PSI pirq to an irq. */
105int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc,
106 int pirq, int nvec, const char *name, domid_t domid);
107#endif
108
109/* De-allocates the above mentioned physical interrupt. */
110int xen_destroy_irq(int irq);
111
112/* Return irq from pirq */
113int xen_irq_from_pirq(unsigned pirq);
114
115/* Return the pirq allocated to the irq. */
116int xen_pirq_from_irq(unsigned irq);
117
118/* Return the irq allocated to the gsi */
119int xen_irq_from_gsi(unsigned gsi);
120
121/* Determine whether to ignore this IRQ if it is passed to a guest. */
122int xen_test_irq_shared(int irq);
123
124/* initialize Xen IRQ subsystem */
125void xen_init_IRQ(void);
126#endif /* _XEN_EVENTS_H */
1#ifndef _XEN_EVENTS_H
2#define _XEN_EVENTS_H
3
4#include <linux/interrupt.h>
5
6#include <xen/interface/event_channel.h>
7#include <asm/xen/hypercall.h>
8#include <asm/xen/events.h>
9
10int bind_evtchn_to_irq(unsigned int evtchn);
11int bind_evtchn_to_irqhandler(unsigned int evtchn,
12 irq_handler_t handler,
13 unsigned long irqflags, const char *devname,
14 void *dev_id);
15int bind_virq_to_irq(unsigned int virq, unsigned int cpu);
16int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu,
17 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);
26int 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);
32
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
40void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector);
41int resend_irq_on_evtchn(unsigned int irq);
42void rebind_evtchn_irq(int evtchn, int irq);
43
44static inline void notify_remote_via_evtchn(int port)
45{
46 struct evtchn_send send = { .port = port };
47 (void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send);
48}
49
50void notify_remote_via_irq(int irq);
51
52void xen_irq_resume(void);
53
54/* Clear an irq's pending state, in preparation for polling on it */
55void xen_clear_irq_pending(int irq);
56void xen_set_irq_pending(int irq);
57bool xen_test_irq_pending(int irq);
58
59/* Poll waiting for an irq to become pending. In the usual case, the
60 irq will be disabled so it won't deliver an interrupt. */
61void xen_poll_irq(int irq);
62
63/* Poll waiting for an irq to become pending with a timeout. In the usual case,
64 * the irq will be disabled so it won't deliver an interrupt. */
65void xen_poll_irq_timeout(int irq, u64 timeout);
66
67/* Determine the IRQ which is bound to an event channel */
68unsigned irq_from_evtchn(unsigned int evtchn);
69
70/* Xen HVM evtchn vector callback */
71void xen_hvm_callback_vector(void);
72extern int xen_have_vector_callback;
73int xen_set_callback_via(uint64_t via);
74void xen_evtchn_do_upcall(struct pt_regs *regs);
75void xen_hvm_evtchn_do_upcall(void);
76
77/* Bind a pirq for a physical interrupt to an irq. */
78int xen_bind_pirq_gsi_to_irq(unsigned gsi,
79 unsigned pirq, int shareable, char *name);
80
81#ifdef CONFIG_PCI_MSI
82/* Allocate a pirq for a MSI style physical interrupt. */
83int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc);
84/* Bind an PSI pirq to an irq. */
85int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc,
86 int pirq, int vector, const char *name,
87 domid_t domid);
88#endif
89
90/* De-allocates the above mentioned physical interrupt. */
91int xen_destroy_irq(int irq);
92
93/* Return irq from pirq */
94int xen_irq_from_pirq(unsigned pirq);
95
96/* Return the pirq allocated to the irq. */
97int xen_pirq_from_irq(unsigned irq);
98
99/* Determine whether to ignore this IRQ if it is passed to a guest. */
100int xen_test_irq_shared(int irq);
101
102#endif /* _XEN_EVENTS_H */