events_internal.h (4a5bb973fa0353d25dbe854694c71bb58eb4cf78) events_internal.h (7e14cde10b1ea8157cca7b6b56901ef9cd4d36a3)
1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * Xen Event Channels (internal header)
4 *
5 * Copyright (C) 2013 Citrix Systems R&D Ltd.
6 */
7#ifndef __EVENTS_INTERNAL_H__
8#define __EVENTS_INTERNAL_H__
9
1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * Xen Event Channels (internal header)
4 *
5 * Copyright (C) 2013 Citrix Systems R&D Ltd.
6 */
7#ifndef __EVENTS_INTERNAL_H__
8#define __EVENTS_INTERNAL_H__
9
10/* Interrupt types. */
11enum xen_irq_type {
12 IRQT_UNBOUND = 0,
13 IRQT_PIRQ,
14 IRQT_VIRQ,
15 IRQT_IPI,
16 IRQT_EVTCHN
17};
18
19/*
20 * Packed IRQ information:
21 * type - enum xen_irq_type
22 * event channel - irq->event channel mapping
23 * cpu - cpu this event channel is bound to
24 * index - type-specific information:
25 * PIRQ - vector, with MSB being "needs EIO", or physical IRQ of the HVM
26 * guest, or GSI (real passthrough IRQ) of the device.
27 * VIRQ - virq number
28 * IPI - IPI vector
29 * EVTCHN -
30 */
31struct irq_info {
32 struct list_head list;
33 struct list_head eoi_list;
34 short refcnt;
35 short spurious_cnt;
36 enum xen_irq_type type; /* type */
37 unsigned irq;
38 evtchn_port_t evtchn; /* event channel */
39 unsigned short cpu; /* cpu bound */
40 unsigned short eoi_cpu; /* EOI must happen on this cpu */
41 unsigned int irq_epoch; /* If eoi_cpu valid: irq_epoch of event */
42 u64 eoi_time; /* Time in jiffies when to EOI. */
43
44 union {
45 unsigned short virq;
46 enum ipi_vector ipi;
47 struct {
48 unsigned short pirq;
49 unsigned short gsi;
50 unsigned char vector;
51 unsigned char flags;
52 uint16_t domid;
53 } pirq;
54 } u;
55};
56
57#define PIRQ_NEEDS_EOI (1 << 0)
58#define PIRQ_SHAREABLE (1 << 1)
59#define PIRQ_MSI_GROUP (1 << 2)
60
61struct evtchn_loop_ctrl;
62
63struct evtchn_ops {
64 unsigned (*max_channels)(void);
65 unsigned (*nr_channels)(void);
66
10struct evtchn_loop_ctrl;
11
12struct evtchn_ops {
13 unsigned (*max_channels)(void);
14 unsigned (*nr_channels)(void);
15
67 int (*setup)(struct irq_info *info);
68 void (*bind_to_cpu)(struct irq_info *info, unsigned cpu);
16 int (*setup)(evtchn_port_t port);
17 void (*bind_to_cpu)(evtchn_port_t evtchn, unsigned int cpu,
18 unsigned int old_cpu);
69
70 void (*clear_pending)(evtchn_port_t port);
71 void (*set_pending)(evtchn_port_t port);
72 bool (*is_pending)(evtchn_port_t port);
73 bool (*test_and_set_mask)(evtchn_port_t port);
74 void (*mask)(evtchn_port_t port);
75 void (*unmask)(evtchn_port_t port);
76
77 void (*handle_events)(unsigned cpu, struct evtchn_loop_ctrl *ctrl);
78 void (*resume)(void);
79
80 int (*percpu_init)(unsigned int cpu);
81 int (*percpu_deinit)(unsigned int cpu);
82};
83
84extern const struct evtchn_ops *evtchn_ops;
85
19
20 void (*clear_pending)(evtchn_port_t port);
21 void (*set_pending)(evtchn_port_t port);
22 bool (*is_pending)(evtchn_port_t port);
23 bool (*test_and_set_mask)(evtchn_port_t port);
24 void (*mask)(evtchn_port_t port);
25 void (*unmask)(evtchn_port_t port);
26
27 void (*handle_events)(unsigned cpu, struct evtchn_loop_ctrl *ctrl);
28 void (*resume)(void);
29
30 int (*percpu_init)(unsigned int cpu);
31 int (*percpu_deinit)(unsigned int cpu);
32};
33
34extern const struct evtchn_ops *evtchn_ops;
35
86extern int **evtchn_to_irq;
87int get_evtchn_to_irq(evtchn_port_t evtchn);
88void handle_irq_for_port(evtchn_port_t port, struct evtchn_loop_ctrl *ctrl);
89
36int get_evtchn_to_irq(evtchn_port_t evtchn);
37void handle_irq_for_port(evtchn_port_t port, struct evtchn_loop_ctrl *ctrl);
38
90struct irq_info *info_for_irq(unsigned irq);
91unsigned cpu_from_irq(unsigned irq);
92unsigned int cpu_from_evtchn(evtchn_port_t evtchn);
93
94static inline unsigned xen_evtchn_max_channels(void)
95{
96 return evtchn_ops->max_channels();
97}
98
99/*
100 * Do any ABI specific setup for a bound event channel before it can
101 * be unmasked and used.
102 */
39unsigned int cpu_from_evtchn(evtchn_port_t evtchn);
40
41static inline unsigned xen_evtchn_max_channels(void)
42{
43 return evtchn_ops->max_channels();
44}
45
46/*
47 * Do any ABI specific setup for a bound event channel before it can
48 * be unmasked and used.
49 */
103static inline int xen_evtchn_port_setup(struct irq_info *info)
50static inline int xen_evtchn_port_setup(evtchn_port_t evtchn)
104{
105 if (evtchn_ops->setup)
51{
52 if (evtchn_ops->setup)
106 return evtchn_ops->setup(info);
53 return evtchn_ops->setup(evtchn);
107 return 0;
108}
109
54 return 0;
55}
56
110static inline void xen_evtchn_port_bind_to_cpu(struct irq_info *info,
111 unsigned cpu)
57static inline void xen_evtchn_port_bind_to_cpu(evtchn_port_t evtchn,
58 unsigned int cpu,
59 unsigned int old_cpu)
112{
60{
113 evtchn_ops->bind_to_cpu(info, cpu);
61 evtchn_ops->bind_to_cpu(evtchn, cpu, old_cpu);
114}
115
116static inline void clear_evtchn(evtchn_port_t port)
117{
118 evtchn_ops->clear_pending(port);
119}
120
121static inline void set_evtchn(evtchn_port_t port)

--- 40 unchanged lines hidden --- 		62}
63
64static inline void clear_evtchn(evtchn_port_t port)
65{
66 evtchn_ops->clear_pending(port);
67}
68
69static inline void set_evtchn(evtchn_port_t port)

--- 40 unchanged lines hidden ---