FreeBSD/Linux Kernel Cross Reference
sys/sys/intr.h
1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2015-2016 Svatopluk Kraus
5 * Copyright (c) 2015-2016 Michal Meloun
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD: releng/12.0/sys/sys/intr.h 326823 2017-12-13 16:13:17Z pfg $
30 */
31
32 #ifndef _SYS_INTR_H_
33 #define _SYS_INTR_H_
34 #ifndef INTRNG
35 #error Need INTRNG for this file
36 #endif
37
38 #include <sys/systm.h>
39
40 #define INTR_IRQ_INVALID 0xFFFFFFFF
41
42 enum intr_map_data_type {
43 INTR_MAP_DATA_ACPI = 0,
44 INTR_MAP_DATA_FDT,
45 INTR_MAP_DATA_GPIO,
46 INTR_MAP_DATA_MSI,
47
48 /* Placeholders for platform specific types */
49 INTR_MAP_DATA_PLAT_1 = 1000,
50 INTR_MAP_DATA_PLAT_2,
51 INTR_MAP_DATA_PLAT_3,
52 INTR_MAP_DATA_PLAT_4,
53 INTR_MAP_DATA_PLAT_5,
54 };
55
56 struct intr_map_data {
57 size_t len;
58 enum intr_map_data_type type;
59 };
60
61 struct intr_map_data_msi {
62 struct intr_map_data hdr;
63 struct intr_irqsrc *isrc;
64 };
65
66 #ifdef notyet
67 #define INTR_SOLO INTR_MD1
68 typedef int intr_irq_filter_t(void *arg, struct trapframe *tf);
69 #else
70 typedef int intr_irq_filter_t(void *arg);
71 #endif
72 typedef int intr_child_irq_filter_t(void *arg, uintptr_t irq);
73
74 #define INTR_ISRC_NAMELEN (MAXCOMLEN + 1)
75
76 #define INTR_ISRCF_IPI 0x01 /* IPI interrupt */
77 #define INTR_ISRCF_PPI 0x02 /* PPI interrupt */
78 #define INTR_ISRCF_BOUND 0x04 /* bound to a CPU */
79
80 struct intr_pic;
81
82 /* Interrupt source definition. */
83 struct intr_irqsrc {
84 device_t isrc_dev; /* where isrc is mapped */
85 u_int isrc_irq; /* unique identificator */
86 u_int isrc_flags;
87 char isrc_name[INTR_ISRC_NAMELEN];
88 cpuset_t isrc_cpu; /* on which CPUs is enabled */
89 u_int isrc_index;
90 u_long * isrc_count;
91 u_int isrc_handlers;
92 struct intr_event * isrc_event;
93 #ifdef INTR_SOLO
94 intr_irq_filter_t * isrc_filter;
95 void * isrc_arg;
96 #endif
97 };
98
99 /* Intr interface for PIC. */
100 int intr_isrc_deregister(struct intr_irqsrc *);
101 int intr_isrc_register(struct intr_irqsrc *, device_t, u_int, const char *, ...)
102 __printflike(4, 5);
103
104 #ifdef SMP
105 bool intr_isrc_init_on_cpu(struct intr_irqsrc *isrc, u_int cpu);
106 #endif
107
108 int intr_isrc_dispatch(struct intr_irqsrc *, struct trapframe *);
109 u_int intr_irq_next_cpu(u_int current_cpu, cpuset_t *cpumask);
110
111 struct intr_pic *intr_pic_register(device_t, intptr_t);
112 int intr_pic_deregister(device_t, intptr_t);
113 int intr_pic_claim_root(device_t, intptr_t, intr_irq_filter_t *, void *, u_int);
114 struct intr_pic *intr_pic_add_handler(device_t, struct intr_pic *,
115 intr_child_irq_filter_t *, void *, uintptr_t, uintptr_t);
116
117 extern device_t intr_irq_root_dev;
118
119 /* Intr interface for BUS. */
120
121 int intr_activate_irq(device_t, struct resource *);
122 int intr_deactivate_irq(device_t, struct resource *);
123
124 int intr_setup_irq(device_t, struct resource *, driver_filter_t, driver_intr_t,
125 void *, int, void **);
126 int intr_teardown_irq(device_t, struct resource *, void *);
127
128 int intr_describe_irq(device_t, struct resource *, void *, const char *);
129 int intr_child_irq_handler(struct intr_pic *, uintptr_t);
130
131 /* Intr resources mapping. */
132 struct intr_map_data *intr_alloc_map_data(enum intr_map_data_type, size_t, int);
133 void intr_free_intr_map_data(struct intr_map_data *);
134 u_int intr_map_irq(device_t, intptr_t, struct intr_map_data *);
135 void intr_unmap_irq(u_int );
136 u_int intr_map_clone_irq(u_int );
137
138 /* MSI/MSI-X handling */
139 int intr_msi_register(device_t, intptr_t);
140 int intr_alloc_msi(device_t, device_t, intptr_t, int, int, int *);
141 int intr_release_msi(device_t, device_t, intptr_t, int, int *);
142 int intr_map_msi(device_t, device_t, intptr_t, int, uint64_t *, uint32_t *);
143 int intr_alloc_msix(device_t, device_t, intptr_t, int *);
144 int intr_release_msix(device_t, device_t, intptr_t, int);
145
146 #ifdef SMP
147 int intr_bind_irq(device_t, struct resource *, int);
148
149 void intr_pic_init_secondary(void);
150
151 /* Virtualization for interrupt source IPI counter increment. */
152 static inline void
153 intr_ipi_increment_count(u_long *counter, u_int cpu)
154 {
155
156 KASSERT(cpu < MAXCPU, ("%s: too big cpu %u", __func__, cpu));
157 counter[cpu]++;
158 }
159
160 /* Virtualization for interrupt source IPI counters setup. */
161 u_long * intr_ipi_setup_counters(const char *name);
162
163 #endif
164 #endif /* _SYS_INTR_H */
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