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 | |
14 | unsigned xen_evtchn_nr_channels(void); |
15 | |
16 | int bind_evtchn_to_irq(unsigned int evtchn); |
17 | int bind_evtchn_to_irqhandler(unsigned int evtchn, |
18 | irq_handler_t handler, |
19 | unsigned long irqflags, const char *devname, |
20 | void *dev_id); |
21 | int bind_virq_to_irq(unsigned int virq, unsigned int cpu, bool percpu); |
22 | int 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); |
26 | int 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); |
32 | int bind_interdomain_evtchn_to_irq(unsigned int remote_domain, |
33 | unsigned int remote_port); |
34 | int 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 | */ |
46 | void 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 |
51 | int xen_set_irq_priority(unsigned irq, unsigned priority); |
52 | |
53 | /* |
54 | * Allow extra references to event channels exposed to userspace by evtchn |
55 | */ |
56 | int evtchn_make_refcounted(unsigned int evtchn); |
57 | int evtchn_get(unsigned int evtchn); |
58 | void evtchn_put(unsigned int evtchn); |
59 | |
60 | void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector); |
61 | void rebind_evtchn_irq(int evtchn, int irq); |
62 | int xen_rebind_evtchn_to_cpu(int evtchn, unsigned tcpu); |
63 | |
64 | static 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 | |
70 | void notify_remote_via_irq(int irq); |
71 | |
72 | void xen_irq_resume(void); |
73 | |
74 | /* Clear an irq's pending state, in preparation for polling on it */ |
75 | void xen_clear_irq_pending(int irq); |
76 | void xen_set_irq_pending(int irq); |
77 | bool 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. */ |
81 | void 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. */ |
85 | void xen_poll_irq_timeout(int irq, u64 timeout); |
86 | |
87 | /* Determine the IRQ which is bound to an event channel */ |
88 | unsigned irq_from_evtchn(unsigned int evtchn); |
89 | int irq_from_virq(unsigned int cpu, unsigned int virq); |
90 | unsigned int evtchn_from_irq(unsigned irq); |
91 | |
92 | #ifdef CONFIG_XEN_PVHVM |
93 | /* Xen HVM evtchn vector callback */ |
94 | void xen_hvm_callback_vector(void); |
95 | #ifdef CONFIG_TRACING |
96 | #define trace_xen_hvm_callback_vector xen_hvm_callback_vector |
97 | #endif |
98 | #endif |
99 | int xen_set_callback_via(uint64_t via); |
100 | void xen_evtchn_do_upcall(struct pt_regs *regs); |
101 | void xen_hvm_evtchn_do_upcall(void); |
102 | |
103 | /* Bind a pirq for a physical interrupt to an irq. */ |
104 | int xen_bind_pirq_gsi_to_irq(unsigned gsi, |
105 | unsigned pirq, int shareable, char *name); |
106 | |
107 | #ifdef CONFIG_PCI_MSI |
108 | /* Allocate a pirq for a MSI style physical interrupt. */ |
109 | int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc); |
110 | /* Bind an PSI pirq to an irq. */ |
111 | int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc, |
112 | int pirq, int nvec, const char *name, domid_t domid); |
113 | #endif |
114 | |
115 | /* De-allocates the above mentioned physical interrupt. */ |
116 | int xen_destroy_irq(int irq); |
117 | |
118 | /* Return irq from pirq */ |
119 | int xen_irq_from_pirq(unsigned pirq); |
120 | |
121 | /* Return the pirq allocated to the irq. */ |
122 | int xen_pirq_from_irq(unsigned irq); |
123 | |
124 | /* Return the irq allocated to the gsi */ |
125 | int xen_irq_from_gsi(unsigned gsi); |
126 | |
127 | /* Determine whether to ignore this IRQ if it is passed to a guest. */ |
128 | int xen_test_irq_shared(int irq); |
129 | |
130 | /* initialize Xen IRQ subsystem */ |
131 | void xen_init_IRQ(void); |
132 | #endif /* _XEN_EVENTS_H */ |
133 | |