Root/kernel/irq/internals.h

1/*
2 * IRQ subsystem internal functions and variables:
3 */
4#include <linux/irqdesc.h>
5
6#ifdef CONFIG_SPARSE_IRQ
7# define IRQ_BITMAP_BITS (NR_IRQS + 8196)
8#else
9# define IRQ_BITMAP_BITS NR_IRQS
10#endif
11
12extern int noirqdebug;
13
14#define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data)
15
16/* Set default functions for irq_chip structures: */
17extern void irq_chip_set_defaults(struct irq_chip *chip);
18
19/* Set default handler: */
20extern void compat_irq_chip_set_default_handler(struct irq_desc *desc);
21
22extern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,
23        unsigned long flags);
24extern void __disable_irq(struct irq_desc *desc, unsigned int irq, bool susp);
25extern void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume);
26
27extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr);
28
29/* Resending of interrupts :*/
30void check_irq_resend(struct irq_desc *desc, unsigned int irq);
31
32#ifdef CONFIG_PROC_FS
33extern void register_irq_proc(unsigned int irq, struct irq_desc *desc);
34extern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc);
35extern void register_handler_proc(unsigned int irq, struct irqaction *action);
36extern void unregister_handler_proc(unsigned int irq, struct irqaction *action);
37#else
38static inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { }
39static inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { }
40static inline void register_handler_proc(unsigned int irq,
41                     struct irqaction *action) { }
42static inline void unregister_handler_proc(unsigned int irq,
43                       struct irqaction *action) { }
44#endif
45
46extern int irq_select_affinity_usr(unsigned int irq);
47
48extern void irq_set_thread_affinity(struct irq_desc *desc);
49
50#ifndef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED
51static inline void irq_end(unsigned int irq, struct irq_desc *desc)
52{
53    if (desc->irq_data.chip && desc->irq_data.chip->end)
54        desc->irq_data.chip->end(irq);
55}
56#else
57static inline void irq_end(unsigned int irq, struct irq_desc *desc) { }
58#endif
59
60/* Inline functions for support of irq chips on slow busses */
61static inline void chip_bus_lock(struct irq_desc *desc)
62{
63    if (unlikely(desc->irq_data.chip->irq_bus_lock))
64        desc->irq_data.chip->irq_bus_lock(&desc->irq_data);
65}
66
67static inline void chip_bus_sync_unlock(struct irq_desc *desc)
68{
69    if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock))
70        desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data);
71}
72
73/*
74 * Debugging printout:
75 */
76
77#include <linux/kallsyms.h>
78
79#define P(f) if (desc->status & f) printk("%14s set\n", #f)
80
81static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc)
82{
83    printk("irq %d, desc: %p, depth: %d, count: %d, unhandled: %d\n",
84        irq, desc, desc->depth, desc->irq_count, desc->irqs_unhandled);
85    printk("->handle_irq(): %p, ", desc->handle_irq);
86    print_symbol("%s\n", (unsigned long)desc->handle_irq);
87    printk("->irq_data.chip(): %p, ", desc->irq_data.chip);
88    print_symbol("%s\n", (unsigned long)desc->irq_data.chip);
89    printk("->action(): %p\n", desc->action);
90    if (desc->action) {
91        printk("->action->handler(): %p, ", desc->action->handler);
92        print_symbol("%s\n", (unsigned long)desc->action->handler);
93    }
94
95    P(IRQ_INPROGRESS);
96    P(IRQ_DISABLED);
97    P(IRQ_PENDING);
98    P(IRQ_REPLAY);
99    P(IRQ_AUTODETECT);
100    P(IRQ_WAITING);
101    P(IRQ_LEVEL);
102    P(IRQ_MASKED);
103#ifdef CONFIG_IRQ_PER_CPU
104    P(IRQ_PER_CPU);
105#endif
106    P(IRQ_NOPROBE);
107    P(IRQ_NOREQUEST);
108    P(IRQ_NOAUTOEN);
109}
110
111#undef P
112
113

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