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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
15struct xenbus_device;
16
17unsigned xen_evtchn_nr_channels(void);
18
19int bind_evtchn_to_irq(evtchn_port_t evtchn);
20int bind_evtchn_to_irq_lateeoi(evtchn_port_t evtchn);
21int bind_evtchn_to_irqhandler(evtchn_port_t evtchn,
22 irq_handler_t handler,
23 unsigned long irqflags, const char *devname,
24 void *dev_id);
25int bind_evtchn_to_irqhandler_lateeoi(evtchn_port_t evtchn,
26 irq_handler_t handler,
27 unsigned long irqflags, const char *devname,
28 void *dev_id);
29int bind_virq_to_irq(unsigned int virq, unsigned int cpu, bool percpu);
30int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu,
31 irq_handler_t handler,
32 unsigned long irqflags, const char *devname,
33 void *dev_id);
34int bind_ipi_to_irqhandler(enum ipi_vector ipi,
35 unsigned int cpu,
36 irq_handler_t handler,
37 unsigned long irqflags,
38 const char *devname,
39 void *dev_id);
40int bind_interdomain_evtchn_to_irq_lateeoi(struct xenbus_device *dev,
41 evtchn_port_t remote_port);
42int bind_interdomain_evtchn_to_irqhandler_lateeoi(struct xenbus_device *dev,
43 evtchn_port_t remote_port,
44 irq_handler_t handler,
45 unsigned long irqflags,
46 const char *devname,
47 void *dev_id);
48
49/*
50 * Common unbind function for all event sources. Takes IRQ to unbind from.
51 * Automatically closes the underlying event channel (even for bindings
52 * made with bind_evtchn_to_irqhandler()).
53 */
54void unbind_from_irqhandler(unsigned int irq, void *dev_id);
55
56/*
57 * Send late EOI for an IRQ bound to an event channel via one of the *_lateeoi
58 * functions above.
59 */
60void xen_irq_lateeoi(unsigned int irq, unsigned int eoi_flags);
61/* Signal an event was spurious, i.e. there was no action resulting from it. */
62#define XEN_EOI_FLAG_SPURIOUS 0x00000001
63
64#define XEN_IRQ_PRIORITY_MAX EVTCHN_FIFO_PRIORITY_MAX
65#define XEN_IRQ_PRIORITY_DEFAULT EVTCHN_FIFO_PRIORITY_DEFAULT
66#define XEN_IRQ_PRIORITY_MIN EVTCHN_FIFO_PRIORITY_MIN
67int xen_set_irq_priority(unsigned irq, unsigned priority);
68
69/*
70 * Allow extra references to event channels exposed to userspace by evtchn
71 */
72int evtchn_make_refcounted(evtchn_port_t evtchn);
73int evtchn_get(evtchn_port_t evtchn);
74void evtchn_put(evtchn_port_t evtchn);
75
76void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector);
77void rebind_evtchn_irq(evtchn_port_t evtchn, int irq);
78int xen_set_affinity_evtchn(struct irq_desc *desc, unsigned int tcpu);
79
80static inline void notify_remote_via_evtchn(evtchn_port_t port)
81{
82 struct evtchn_send send = { .port = port };
83 (void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send);
84}
85
86void notify_remote_via_irq(int irq);
87
88void xen_irq_resume(void);
89
90/* Clear an irq's pending state, in preparation for polling on it */
91void xen_clear_irq_pending(int irq);
92void xen_set_irq_pending(int irq);
93bool xen_test_irq_pending(int irq);
94
95/* Poll waiting for an irq to become pending. In the usual case, the
96 irq will be disabled so it won't deliver an interrupt. */
97void xen_poll_irq(int irq);
98
99/* Poll waiting for an irq to become pending with a timeout. In the usual case,
100 * the irq will be disabled so it won't deliver an interrupt. */
101void xen_poll_irq_timeout(int irq, u64 timeout);
102
103/* Determine the IRQ which is bound to an event channel */
104unsigned int irq_from_evtchn(evtchn_port_t evtchn);
105int irq_from_virq(unsigned int cpu, unsigned int virq);
106evtchn_port_t evtchn_from_irq(unsigned irq);
107
108int xen_set_callback_via(uint64_t via);
109void xen_evtchn_do_upcall(struct pt_regs *regs);
110void xen_hvm_evtchn_do_upcall(void);
111
112/* Bind a pirq for a physical interrupt to an irq. */
113int xen_bind_pirq_gsi_to_irq(unsigned gsi,
114 unsigned pirq, int shareable, char *name);
115
116#ifdef CONFIG_PCI_MSI
117/* Allocate a pirq for a MSI style physical interrupt. */
118int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc);
119/* Bind an PSI pirq to an irq. */
120int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc,
121 int pirq, int nvec, const char *name, domid_t domid);
122#endif
123
124/* De-allocates the above mentioned physical interrupt. */
125int xen_destroy_irq(int irq);
126
127/* Return irq from pirq */
128int xen_irq_from_pirq(unsigned pirq);
129
130/* Return the pirq allocated to the irq. */
131int xen_pirq_from_irq(unsigned irq);
132
133/* Return the irq allocated to the gsi */
134int xen_irq_from_gsi(unsigned gsi);
135
136/* Determine whether to ignore this IRQ if it is passed to a guest. */
137int xen_test_irq_shared(int irq);
138
139/* initialize Xen IRQ subsystem */
140void xen_init_IRQ(void);
141#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 */