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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 | |
10 | int bind_evtchn_to_irq(unsigned int evtchn); |
11 | int bind_evtchn_to_irqhandler(unsigned int evtchn, |
12 | irq_handler_t handler, |
13 | unsigned long irqflags, const char *devname, |
14 | void *dev_id); |
15 | int bind_virq_to_irq(unsigned int virq, unsigned int cpu); |
16 | int 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); |
20 | int 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); |
26 | int 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 | */ |
38 | void unbind_from_irqhandler(unsigned int irq, void *dev_id); |
39 | |
40 | /* |
41 | * Allow extra references to event channels exposed to userspace by evtchn |
42 | */ |
43 | int evtchn_make_refcounted(unsigned int evtchn); |
44 | int evtchn_get(unsigned int evtchn); |
45 | void evtchn_put(unsigned int evtchn); |
46 | |
47 | void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector); |
48 | int resend_irq_on_evtchn(unsigned int irq); |
49 | void rebind_evtchn_irq(int evtchn, int irq); |
50 | |
51 | static inline void notify_remote_via_evtchn(int port) |
52 | { |
53 | struct evtchn_send send = { .port = port }; |
54 | (void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send); |
55 | } |
56 | |
57 | void notify_remote_via_irq(int irq); |
58 | |
59 | void xen_irq_resume(void); |
60 | |
61 | /* Clear an irq's pending state, in preparation for polling on it */ |
62 | void xen_clear_irq_pending(int irq); |
63 | void xen_set_irq_pending(int irq); |
64 | bool xen_test_irq_pending(int irq); |
65 | |
66 | /* Poll waiting for an irq to become pending. In the usual case, the |
67 | irq will be disabled so it won't deliver an interrupt. */ |
68 | void xen_poll_irq(int irq); |
69 | |
70 | /* Poll waiting for an irq to become pending with a timeout. In the usual case, |
71 | * the irq will be disabled so it won't deliver an interrupt. */ |
72 | void xen_poll_irq_timeout(int irq, u64 timeout); |
73 | |
74 | /* Determine the IRQ which is bound to an event channel */ |
75 | unsigned irq_from_evtchn(unsigned int evtchn); |
76 | |
77 | /* Xen HVM evtchn vector callback */ |
78 | void xen_hvm_callback_vector(void); |
79 | #ifdef CONFIG_TRACING |
80 | #define trace_xen_hvm_callback_vector xen_hvm_callback_vector |
81 | #endif |
82 | extern int xen_have_vector_callback; |
83 | int xen_set_callback_via(uint64_t via); |
84 | void xen_evtchn_do_upcall(struct pt_regs *regs); |
85 | void xen_hvm_evtchn_do_upcall(void); |
86 | |
87 | /* Bind a pirq for a physical interrupt to an irq. */ |
88 | int xen_bind_pirq_gsi_to_irq(unsigned gsi, |
89 | unsigned pirq, int shareable, char *name); |
90 | |
91 | #ifdef CONFIG_PCI_MSI |
92 | /* Allocate a pirq for a MSI style physical interrupt. */ |
93 | int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc); |
94 | /* Bind an PSI pirq to an irq. */ |
95 | int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc, |
96 | int pirq, const char *name, domid_t domid); |
97 | #endif |
98 | |
99 | /* De-allocates the above mentioned physical interrupt. */ |
100 | int xen_destroy_irq(int irq); |
101 | |
102 | /* Return irq from pirq */ |
103 | int xen_irq_from_pirq(unsigned pirq); |
104 | |
105 | /* Return the pirq allocated to the irq. */ |
106 | int xen_pirq_from_irq(unsigned irq); |
107 | |
108 | /* Return the irq allocated to the gsi */ |
109 | int xen_irq_from_gsi(unsigned gsi); |
110 | |
111 | /* Determine whether to ignore this IRQ if it is passed to a guest. */ |
112 | int xen_test_irq_shared(int irq); |
113 | |
114 | /* initialize Xen IRQ subsystem */ |
115 | void xen_init_IRQ(void); |
116 | #endif /* _XEN_EVENTS_H */ |
117 |
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