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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(unsigned int evtchn);
18int bind_evtchn_to_irqhandler(unsigned int 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 unsigned int remote_port);
35int bind_interdomain_evtchn_to_irqhandler(unsigned int remote_domain,
36 unsigned int 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(unsigned int evtchn);
58int evtchn_get(unsigned int evtchn);
59void evtchn_put(unsigned int evtchn);
60
61void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector);
62void rebind_evtchn_irq(int evtchn, int irq);
63int xen_set_affinity_evtchn(struct irq_desc *desc, unsigned int tcpu);
64
65static inline void notify_remote_via_evtchn(int 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 irq_from_evtchn(unsigned int evtchn);
90int irq_from_virq(unsigned int cpu, unsigned int virq);
91unsigned int evtchn_from_irq(unsigned irq);
92
93#ifdef CONFIG_XEN_PVHVM
94/* Xen HVM evtchn vector callback */
95void xen_hvm_callback_vector(void);
96#ifdef CONFIG_TRACING
97#define trace_xen_hvm_callback_vector xen_hvm_callback_vector
98#endif
99#endif
100int xen_set_callback_via(uint64_t via);
101void xen_evtchn_do_upcall(struct pt_regs *regs);
102void xen_hvm_evtchn_do_upcall(void);
103
104/* Bind a pirq for a physical interrupt to an irq. */
105int xen_bind_pirq_gsi_to_irq(unsigned gsi,
106 unsigned pirq, int shareable, char *name);
107
108#ifdef CONFIG_PCI_MSI
109/* Allocate a pirq for a MSI style physical interrupt. */
110int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc);
111/* Bind an PSI pirq to an irq. */
112int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc,
113 int pirq, int nvec, const char *name, domid_t domid);
114#endif
115
116/* De-allocates the above mentioned physical interrupt. */
117int xen_destroy_irq(int irq);
118
119/* Return irq from pirq */
120int xen_irq_from_pirq(unsigned pirq);
121
122/* Return the pirq allocated to the irq. */
123int xen_pirq_from_irq(unsigned irq);
124
125/* Return the irq allocated to the gsi */
126int xen_irq_from_gsi(unsigned gsi);
127
128/* Determine whether to ignore this IRQ if it is passed to a guest. */
129int xen_test_irq_shared(int irq);
130
131/* initialize Xen IRQ subsystem */
132void xen_init_IRQ(void);
133#endif /* _XEN_EVENTS_H */
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _XEN_EVENTS_H
3#define _XEN_EVENTS_H
4
5#include <linux/interrupt.h>
6#ifdef CONFIG_PCI_MSI
7#include <linux/msi.h>
8#endif
9
10#include <xen/interface/event_channel.h>
11#include <asm/xen/hypercall.h>
12#include <asm/xen/events.h>
13
14unsigned xen_evtchn_nr_channels(void);
15
16int bind_evtchn_to_irq(unsigned int evtchn);
17int bind_evtchn_to_irqhandler(unsigned int evtchn,
18 irq_handler_t handler,
19 unsigned long irqflags, const char *devname,
20 void *dev_id);
21int bind_virq_to_irq(unsigned int virq, unsigned int cpu, bool percpu);
22int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu,
23 irq_handler_t handler,
24 unsigned long irqflags, const char *devname,
25 void *dev_id);
26int bind_ipi_to_irqhandler(enum ipi_vector ipi,
27 unsigned int cpu,
28 irq_handler_t handler,
29 unsigned long irqflags,
30 const char *devname,
31 void *dev_id);
32int bind_interdomain_evtchn_to_irq(unsigned int remote_domain,
33 unsigned int remote_port);
34int bind_interdomain_evtchn_to_irqhandler(unsigned int remote_domain,
35 unsigned int remote_port,
36 irq_handler_t handler,
37 unsigned long irqflags,
38 const char *devname,
39 void *dev_id);
40
41/*
42 * Common unbind function for all event sources. Takes IRQ to unbind from.
43 * Automatically closes the underlying event channel (even for bindings
44 * made with bind_evtchn_to_irqhandler()).
45 */
46void unbind_from_irqhandler(unsigned int irq, void *dev_id);
47
48#define XEN_IRQ_PRIORITY_MAX EVTCHN_FIFO_PRIORITY_MAX
49#define XEN_IRQ_PRIORITY_DEFAULT EVTCHN_FIFO_PRIORITY_DEFAULT
50#define XEN_IRQ_PRIORITY_MIN EVTCHN_FIFO_PRIORITY_MIN
51int xen_set_irq_priority(unsigned irq, unsigned priority);
52
53/*
54 * Allow extra references to event channels exposed to userspace by evtchn
55 */
56int evtchn_make_refcounted(unsigned int evtchn);
57int evtchn_get(unsigned int evtchn);
58void evtchn_put(unsigned int evtchn);
59
60void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector);
61void rebind_evtchn_irq(int evtchn, int irq);
62int xen_rebind_evtchn_to_cpu(int evtchn, unsigned tcpu);
63
64static inline void notify_remote_via_evtchn(int port)
65{
66 struct evtchn_send send = { .port = port };
67 (void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send);
68}
69
70void notify_remote_via_irq(int irq);
71
72void xen_irq_resume(void);
73
74/* Clear an irq's pending state, in preparation for polling on it */
75void xen_clear_irq_pending(int irq);
76void xen_set_irq_pending(int irq);
77bool xen_test_irq_pending(int irq);
78
79/* Poll waiting for an irq to become pending. In the usual case, the
80 irq will be disabled so it won't deliver an interrupt. */
81void xen_poll_irq(int irq);
82
83/* Poll waiting for an irq to become pending with a timeout. In the usual case,
84 * the irq will be disabled so it won't deliver an interrupt. */
85void xen_poll_irq_timeout(int irq, u64 timeout);
86
87/* Determine the IRQ which is bound to an event channel */
88unsigned irq_from_evtchn(unsigned int evtchn);
89int irq_from_virq(unsigned int cpu, unsigned int virq);
90unsigned int evtchn_from_irq(unsigned irq);
91
92/* Xen HVM evtchn vector callback */
93void xen_hvm_callback_vector(void);
94#ifdef CONFIG_TRACING
95#define trace_xen_hvm_callback_vector xen_hvm_callback_vector
96#endif
97int xen_set_callback_via(uint64_t via);
98void xen_evtchn_do_upcall(struct pt_regs *regs);
99void xen_hvm_evtchn_do_upcall(void);
100
101/* Bind a pirq for a physical interrupt to an irq. */
102int xen_bind_pirq_gsi_to_irq(unsigned gsi,
103 unsigned pirq, int shareable, char *name);
104
105#ifdef CONFIG_PCI_MSI
106/* Allocate a pirq for a MSI style physical interrupt. */
107int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc);
108/* Bind an PSI pirq to an irq. */
109int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc,
110 int pirq, int nvec, const char *name, domid_t domid);
111#endif
112
113/* De-allocates the above mentioned physical interrupt. */
114int xen_destroy_irq(int irq);
115
116/* Return irq from pirq */
117int xen_irq_from_pirq(unsigned pirq);
118
119/* Return the pirq allocated to the irq. */
120int xen_pirq_from_irq(unsigned irq);
121
122/* Return the irq allocated to the gsi */
123int xen_irq_from_gsi(unsigned gsi);
124
125/* Determine whether to ignore this IRQ if it is passed to a guest. */
126int xen_test_irq_shared(int irq);
127
128/* initialize Xen IRQ subsystem */
129void xen_init_IRQ(void);
130#endif /* _XEN_EVENTS_H */