Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
e46cdb66 JF |
2 | #ifndef _XEN_EVENTS_H |
3 | #define _XEN_EVENTS_H | |
4 | ||
f87e4cac | 5 | #include <linux/interrupt.h> |
bce5963b | 6 | #include <linux/irq.h> |
4892c9b4 RPM |
7 | #ifdef CONFIG_PCI_MSI |
8 | #include <linux/msi.h> | |
9 | #endif | |
f87e4cac JF |
10 | |
11 | #include <xen/interface/event_channel.h> | |
12 | #include <asm/xen/hypercall.h> | |
e849c3e9 | 13 | #include <asm/xen/events.h> |
e46cdb66 | 14 | |
f2fa0e5e JG |
15 | struct xenbus_device; |
16 | ||
0dc0064a DV |
17 | unsigned xen_evtchn_nr_channels(void); |
18 | ||
0102e4ef | 19 | int bind_evtchn_to_irq(evtchn_port_t evtchn); |
fe415186 | 20 | int bind_evtchn_to_irq_lateeoi(evtchn_port_t evtchn); |
0102e4ef | 21 | int bind_evtchn_to_irqhandler(evtchn_port_t evtchn, |
f87e4cac | 22 | irq_handler_t handler, |
e46cdb66 JF |
23 | unsigned long irqflags, const char *devname, |
24 | void *dev_id); | |
54c9de89 JG |
25 | int 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); | |
77bb3dfd | 29 | int bind_virq_to_irq(unsigned int virq, unsigned int cpu, bool percpu); |
e46cdb66 | 30 | int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu, |
f87e4cac JF |
31 | irq_handler_t handler, |
32 | unsigned long irqflags, const char *devname, | |
33 | void *dev_id); | |
34 | int 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); | |
f2fa0e5e | 40 | int bind_interdomain_evtchn_to_irq_lateeoi(struct xenbus_device *dev, |
54c9de89 | 41 | evtchn_port_t remote_port); |
f2fa0e5e | 42 | int bind_interdomain_evtchn_to_irqhandler_lateeoi(struct xenbus_device *dev, |
54c9de89 JG |
43 | evtchn_port_t remote_port, |
44 | irq_handler_t handler, | |
45 | unsigned long irqflags, | |
46 | const char *devname, | |
47 | void *dev_id); | |
e46cdb66 JF |
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 | */ | |
54 | void unbind_from_irqhandler(unsigned int irq, void *dev_id); | |
55 | ||
54c9de89 JG |
56 | /* |
57 | * Send late EOI for an IRQ bound to an event channel via one of the *_lateeoi | |
58 | * functions above. | |
59 | */ | |
60 | void 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 | ||
6ccecb0f DV |
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 | |
67 | int xen_set_irq_priority(unsigned irq, unsigned priority); | |
68 | ||
420eb554 DDG |
69 | /* |
70 | * Allow extra references to event channels exposed to userspace by evtchn | |
71 | */ | |
0102e4ef YY |
72 | int evtchn_make_refcounted(evtchn_port_t evtchn); |
73 | int evtchn_get(evtchn_port_t evtchn); | |
74 | void evtchn_put(evtchn_port_t evtchn); | |
420eb554 | 75 | |
f87e4cac | 76 | void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector); |
0102e4ef | 77 | void rebind_evtchn_irq(evtchn_port_t evtchn, int irq); |
bce5963b | 78 | int xen_set_affinity_evtchn(struct irq_desc *desc, unsigned int tcpu); |
f87e4cac | 79 | |
0102e4ef | 80 | static inline void notify_remote_via_evtchn(evtchn_port_t port) |
e46cdb66 JF |
81 | { |
82 | struct evtchn_send send = { .port = port }; | |
83 | (void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send); | |
84 | } | |
85 | ||
76465b2d | 86 | void notify_remote_via_irq(int irq); |
0e91398f | 87 | |
76465b2d | 88 | void xen_irq_resume(void); |
0e91398f | 89 | |
2d9e1e2f JF |
90 | /* Clear an irq's pending state, in preparation for polling on it */ |
91 | void xen_clear_irq_pending(int irq); | |
168d2f46 JF |
92 | void xen_set_irq_pending(int irq); |
93 | bool xen_test_irq_pending(int irq); | |
2d9e1e2f JF |
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. */ | |
97 | void xen_poll_irq(int irq); | |
98 | ||
d9a8814f KRW |
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. */ | |
101 | void xen_poll_irq_timeout(int irq, u64 timeout); | |
102 | ||
d4c04536 | 103 | /* Determine the IRQ which is bound to an event channel */ |
0102e4ef | 104 | unsigned int irq_from_evtchn(evtchn_port_t evtchn); |
9a489f45 | 105 | int irq_from_virq(unsigned int cpu, unsigned int virq); |
0102e4ef | 106 | evtchn_port_t evtchn_from_irq(unsigned irq); |
d4c04536 | 107 | |
38e20b07 SY |
108 | int xen_set_callback_via(uint64_t via); |
109 | void xen_evtchn_do_upcall(struct pt_regs *regs); | |
110 | void xen_hvm_evtchn_do_upcall(void); | |
111 | ||
f4d0635b IC |
112 | /* Bind a pirq for a physical interrupt to an irq. */ |
113 | int xen_bind_pirq_gsi_to_irq(unsigned gsi, | |
114 | unsigned pirq, int shareable, char *name); | |
f731e3ef QH |
115 | |
116 | #ifdef CONFIG_PCI_MSI | |
f4d0635b | 117 | /* Allocate a pirq for a MSI style physical interrupt. */ |
bf480d95 | 118 | int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc); |
f4d0635b | 119 | /* Bind an PSI pirq to an irq. */ |
bf480d95 | 120 | int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc, |
4892c9b4 | 121 | int pirq, int nvec, const char *name, domid_t domid); |
f731e3ef | 122 | #endif |
d46a78b0 | 123 | |
b5401a96 AN |
124 | /* De-allocates the above mentioned physical interrupt. */ |
125 | int xen_destroy_irq(int irq); | |
126 | ||
af42b8d1 SS |
127 | /* Return irq from pirq */ |
128 | int xen_irq_from_pirq(unsigned pirq); | |
129 | ||
e6197acc KRW |
130 | /* Return the pirq allocated to the irq. */ |
131 | int xen_pirq_from_irq(unsigned irq); | |
132 | ||
68c2c39a SS |
133 | /* Return the irq allocated to the gsi */ |
134 | int xen_irq_from_gsi(unsigned gsi); | |
135 | ||
c7c2c3a2 KRW |
136 | /* Determine whether to ignore this IRQ if it is passed to a guest. */ |
137 | int xen_test_irq_shared(int irq); | |
138 | ||
0ec53ecf SS |
139 | /* initialize Xen IRQ subsystem */ |
140 | void xen_init_IRQ(void); | |
e46cdb66 | 141 | #endif /* _XEN_EVENTS_H */ |