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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * IRQ subsystem internal functions and variables: | |
dbec07ba TG |
3 | * |
4 | * Do not ever include this file from anything else than | |
5 | * kernel/irq/. Do not even think about using any information outside | |
6 | * of this file for your non core code. | |
1da177e4 | 7 | */ |
e144710b | 8 | #include <linux/irqdesc.h> |
1da177e4 | 9 | |
c1ee6264 TG |
10 | #ifdef CONFIG_SPARSE_IRQ |
11 | # define IRQ_BITMAP_BITS (NR_IRQS + 8196) | |
12 | #else | |
13 | # define IRQ_BITMAP_BITS NR_IRQS | |
14 | #endif | |
15 | ||
009b4c3b | 16 | #include "compat.h" |
e6bea9c4 TG |
17 | #include "settings.h" |
18 | ||
dbec07ba TG |
19 | #define istate core_internal_state__do_not_mess_with_it |
20 | ||
1da177e4 LT |
21 | extern int noirqdebug; |
22 | ||
1535dfac TG |
23 | /* |
24 | * Bits used by threaded handlers: | |
25 | * IRQTF_RUNTHREAD - signals that the interrupt handler thread should run | |
26 | * IRQTF_DIED - handler thread died | |
27 | * IRQTF_WARNED - warning "IRQ_WAKE_THREAD w/o thread_fn" has been printed | |
28 | * IRQTF_AFFINITY - irq thread is requested to adjust affinity | |
29 | */ | |
30 | enum { | |
31 | IRQTF_RUNTHREAD, | |
32 | IRQTF_DIED, | |
33 | IRQTF_WARNED, | |
34 | IRQTF_AFFINITY, | |
35 | }; | |
36 | ||
bd062e76 TG |
37 | /* |
38 | * Bit masks for desc->state | |
39 | * | |
40 | * IRQS_AUTODETECT - autodetection in progress | |
7acdd53e TG |
41 | * IRQS_SPURIOUS_DISABLED - was disabled due to spurious interrupt |
42 | * detection | |
6954b75b | 43 | * IRQS_POLL_INPROGRESS - polling in progress |
009b4c3b | 44 | * IRQS_INPROGRESS - Interrupt in progress |
3d67baec | 45 | * IRQS_ONESHOT - irq is not unmasked in primary handler |
163ef309 TG |
46 | * IRQS_REPLAY - irq is replayed |
47 | * IRQS_WAITING - irq is waiting | |
c1594b77 | 48 | * IRQS_DISABLED - irq is disabled |
2a0d6fb3 | 49 | * IRQS_PENDING - irq is pending and replayed later |
6e40262e | 50 | * IRQS_MASKED - irq is masked |
bd062e76 TG |
51 | */ |
52 | enum { | |
53 | IRQS_AUTODETECT = 0x00000001, | |
7acdd53e | 54 | IRQS_SPURIOUS_DISABLED = 0x00000002, |
6954b75b | 55 | IRQS_POLL_INPROGRESS = 0x00000008, |
009b4c3b | 56 | IRQS_INPROGRESS = 0x00000010, |
3d67baec | 57 | IRQS_ONESHOT = 0x00000020, |
163ef309 TG |
58 | IRQS_REPLAY = 0x00000040, |
59 | IRQS_WAITING = 0x00000080, | |
c1594b77 | 60 | IRQS_DISABLED = 0x00000100, |
2a0d6fb3 | 61 | IRQS_PENDING = 0x00000200, |
6e40262e | 62 | IRQS_MASKED = 0x00000400, |
bd062e76 TG |
63 | }; |
64 | ||
a77c4635 TG |
65 | #define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data) |
66 | ||
6a6de9ef TG |
67 | /* Set default functions for irq_chip structures: */ |
68 | extern void irq_chip_set_defaults(struct irq_chip *chip); | |
69 | ||
70 | /* Set default handler: */ | |
71 | extern void compat_irq_chip_set_default_handler(struct irq_desc *desc); | |
72 | ||
0c5d1eb7 DB |
73 | extern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq, |
74 | unsigned long flags); | |
0a0c5168 RW |
75 | extern void __disable_irq(struct irq_desc *desc, unsigned int irq, bool susp); |
76 | extern void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume); | |
0c5d1eb7 | 77 | |
46999238 TG |
78 | extern int irq_startup(struct irq_desc *desc); |
79 | extern void irq_shutdown(struct irq_desc *desc); | |
87923470 TG |
80 | extern void irq_enable(struct irq_desc *desc); |
81 | extern void irq_disable(struct irq_desc *desc); | |
46999238 | 82 | |
85ac16d0 | 83 | extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr); |
0fa0ebbf | 84 | |
4912609f TG |
85 | irqreturn_t handle_irq_event_percpu(struct irq_desc *desc, struct irqaction *action); |
86 | irqreturn_t handle_irq_event(struct irq_desc *desc); | |
87 | ||
e144710b TG |
88 | /* Resending of interrupts :*/ |
89 | void check_irq_resend(struct irq_desc *desc, unsigned int irq); | |
fe200ae4 | 90 | bool irq_wait_for_poll(struct irq_desc *desc); |
e144710b | 91 | |
1da177e4 | 92 | #ifdef CONFIG_PROC_FS |
2c6927a3 | 93 | extern void register_irq_proc(unsigned int irq, struct irq_desc *desc); |
13bfe99e | 94 | extern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc); |
1da177e4 LT |
95 | extern void register_handler_proc(unsigned int irq, struct irqaction *action); |
96 | extern void unregister_handler_proc(unsigned int irq, struct irqaction *action); | |
97 | #else | |
2c6927a3 | 98 | static inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { } |
13bfe99e | 99 | static inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { } |
1da177e4 LT |
100 | static inline void register_handler_proc(unsigned int irq, |
101 | struct irqaction *action) { } | |
102 | static inline void unregister_handler_proc(unsigned int irq, | |
103 | struct irqaction *action) { } | |
104 | #endif | |
105 | ||
3b8249e7 | 106 | extern int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask); |
f6d87f4b | 107 | |
591d2fb0 | 108 | extern void irq_set_thread_affinity(struct irq_desc *desc); |
57b150cc | 109 | |
70aedd24 | 110 | /* Inline functions for support of irq chips on slow busses */ |
3876ec9e | 111 | static inline void chip_bus_lock(struct irq_desc *desc) |
70aedd24 | 112 | { |
3876ec9e TG |
113 | if (unlikely(desc->irq_data.chip->irq_bus_lock)) |
114 | desc->irq_data.chip->irq_bus_lock(&desc->irq_data); | |
70aedd24 TG |
115 | } |
116 | ||
3876ec9e | 117 | static inline void chip_bus_sync_unlock(struct irq_desc *desc) |
70aedd24 | 118 | { |
3876ec9e TG |
119 | if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock)) |
120 | desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data); | |
70aedd24 TG |
121 | } |
122 | ||
43f77759 IM |
123 | /* |
124 | * Debugging printout: | |
125 | */ | |
126 | ||
127 | #include <linux/kallsyms.h> | |
128 | ||
129 | #define P(f) if (desc->status & f) printk("%14s set\n", #f) | |
bd062e76 | 130 | #define PS(f) if (desc->istate & f) printk("%14s set\n", #f) |
43f77759 IM |
131 | |
132 | static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc) | |
133 | { | |
134 | printk("irq %d, desc: %p, depth: %d, count: %d, unhandled: %d\n", | |
135 | irq, desc, desc->depth, desc->irq_count, desc->irqs_unhandled); | |
136 | printk("->handle_irq(): %p, ", desc->handle_irq); | |
137 | print_symbol("%s\n", (unsigned long)desc->handle_irq); | |
6b8ff312 TG |
138 | printk("->irq_data.chip(): %p, ", desc->irq_data.chip); |
139 | print_symbol("%s\n", (unsigned long)desc->irq_data.chip); | |
43f77759 IM |
140 | printk("->action(): %p\n", desc->action); |
141 | if (desc->action) { | |
142 | printk("->action->handler(): %p, ", desc->action->handler); | |
143 | print_symbol("%s\n", (unsigned long)desc->action->handler); | |
144 | } | |
145 | ||
43f77759 | 146 | P(IRQ_LEVEL); |
43f77759 IM |
147 | #ifdef CONFIG_IRQ_PER_CPU |
148 | P(IRQ_PER_CPU); | |
149 | #endif | |
150 | P(IRQ_NOPROBE); | |
151 | P(IRQ_NOREQUEST); | |
152 | P(IRQ_NOAUTOEN); | |
bd062e76 TG |
153 | |
154 | PS(IRQS_AUTODETECT); | |
009b4c3b | 155 | PS(IRQS_INPROGRESS); |
163ef309 TG |
156 | PS(IRQS_REPLAY); |
157 | PS(IRQS_WAITING); | |
c1594b77 | 158 | PS(IRQS_DISABLED); |
2a0d6fb3 | 159 | PS(IRQS_PENDING); |
6e40262e | 160 | PS(IRQS_MASKED); |
43f77759 IM |
161 | } |
162 | ||
163 | #undef P | |
bd062e76 | 164 | #undef PS |