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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * IRQ subsystem internal functions and variables:
3 */
Thomas Gleixnere1447102010-10-01 16:03:45 +02004#include <linux/irqdesc.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07005
Thomas Gleixnerc1ee6262011-02-17 17:45:15 +01006#ifdef CONFIG_SPARSE_IRQ
7# define IRQ_BITMAP_BITS (NR_IRQS + 8196)
8#else
9# define IRQ_BITMAP_BITS NR_IRQS
10#endif
11
Linus Torvalds1da177e2005-04-16 15:20:36 -070012extern int noirqdebug;
13
Thomas Gleixner1535dfa2011-02-07 01:55:43 +010014/*
15 * Bits used by threaded handlers:
16 * IRQTF_RUNTHREAD - signals that the interrupt handler thread should run
17 * IRQTF_DIED - handler thread died
18 * IRQTF_WARNED - warning "IRQ_WAKE_THREAD w/o thread_fn" has been printed
19 * IRQTF_AFFINITY - irq thread is requested to adjust affinity
20 */
21enum {
22 IRQTF_RUNTHREAD,
23 IRQTF_DIED,
24 IRQTF_WARNED,
25 IRQTF_AFFINITY,
26};
27
Thomas Gleixnera77c4632010-10-01 14:44:58 +020028#define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data)
29
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -070030/* Set default functions for irq_chip structures: */
31extern void irq_chip_set_defaults(struct irq_chip *chip);
32
33/* Set default handler: */
34extern void compat_irq_chip_set_default_handler(struct irq_desc *desc);
35
David Brownell0c5d1eb2008-10-01 14:46:18 -070036extern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,
37 unsigned long flags);
Rafael J. Wysocki0a0c5162009-03-16 22:33:49 +010038extern void __disable_irq(struct irq_desc *desc, unsigned int irq, bool susp);
39extern void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume);
David Brownell0c5d1eb2008-10-01 14:46:18 -070040
Yinghai Lu85ac16d2009-04-27 18:00:38 -070041extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr);
Mike Travis0fa0ebb2009-01-10 22:24:06 -080042
Thomas Gleixnere1447102010-10-01 16:03:45 +020043/* Resending of interrupts :*/
44void check_irq_resend(struct irq_desc *desc, unsigned int irq);
Thomas Gleixnerfe200ae2011-02-07 10:34:30 +010045bool irq_wait_for_poll(struct irq_desc *desc);
Thomas Gleixnere1447102010-10-01 16:03:45 +020046
Linus Torvalds1da177e2005-04-16 15:20:36 -070047#ifdef CONFIG_PROC_FS
Yinghai Lu2c6927a2008-08-19 20:50:11 -070048extern void register_irq_proc(unsigned int irq, struct irq_desc *desc);
Thomas Gleixner13bfe992010-09-30 02:46:07 +020049extern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc);
Linus Torvalds1da177e2005-04-16 15:20:36 -070050extern void register_handler_proc(unsigned int irq, struct irqaction *action);
51extern void unregister_handler_proc(unsigned int irq, struct irqaction *action);
52#else
Yinghai Lu2c6927a2008-08-19 20:50:11 -070053static inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { }
Thomas Gleixner13bfe992010-09-30 02:46:07 +020054static inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { }
Linus Torvalds1da177e2005-04-16 15:20:36 -070055static inline void register_handler_proc(unsigned int irq,
56 struct irqaction *action) { }
57static inline void unregister_handler_proc(unsigned int irq,
58 struct irqaction *action) { }
59#endif
60
Thomas Gleixner3b8249e2011-02-07 16:02:20 +010061extern int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask);
Thomas Gleixnerf6d87f42008-11-07 13:18:30 +010062
Thomas Gleixner591d2fb2009-07-21 11:09:39 +020063extern void irq_set_thread_affinity(struct irq_desc *desc);
Yinghai Lu57b150c2009-04-27 17:59:53 -070064
Thomas Gleixner70aedd22009-08-13 12:17:48 +020065/* Inline functions for support of irq chips on slow busses */
Thomas Gleixner3876ec92010-09-27 12:44:35 +000066static inline void chip_bus_lock(struct irq_desc *desc)
Thomas Gleixner70aedd22009-08-13 12:17:48 +020067{
Thomas Gleixner3876ec92010-09-27 12:44:35 +000068 if (unlikely(desc->irq_data.chip->irq_bus_lock))
69 desc->irq_data.chip->irq_bus_lock(&desc->irq_data);
Thomas Gleixner70aedd22009-08-13 12:17:48 +020070}
71
Thomas Gleixner3876ec92010-09-27 12:44:35 +000072static inline void chip_bus_sync_unlock(struct irq_desc *desc)
Thomas Gleixner70aedd22009-08-13 12:17:48 +020073{
Thomas Gleixner3876ec92010-09-27 12:44:35 +000074 if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock))
75 desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data);
Thomas Gleixner70aedd22009-08-13 12:17:48 +020076}
77
Ingo Molnar43f77752006-06-29 02:24:58 -070078/*
79 * Debugging printout:
80 */
81
82#include <linux/kallsyms.h>
83
84#define P(f) if (desc->status & f) printk("%14s set\n", #f)
85
86static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc)
87{
88 printk("irq %d, desc: %p, depth: %d, count: %d, unhandled: %d\n",
89 irq, desc, desc->depth, desc->irq_count, desc->irqs_unhandled);
90 printk("->handle_irq(): %p, ", desc->handle_irq);
91 print_symbol("%s\n", (unsigned long)desc->handle_irq);
Thomas Gleixner6b8ff312010-10-01 12:58:38 +020092 printk("->irq_data.chip(): %p, ", desc->irq_data.chip);
93 print_symbol("%s\n", (unsigned long)desc->irq_data.chip);
Ingo Molnar43f77752006-06-29 02:24:58 -070094 printk("->action(): %p\n", desc->action);
95 if (desc->action) {
96 printk("->action->handler(): %p, ", desc->action->handler);
97 print_symbol("%s\n", (unsigned long)desc->action->handler);
98 }
99
100 P(IRQ_INPROGRESS);
101 P(IRQ_DISABLED);
102 P(IRQ_PENDING);
103 P(IRQ_REPLAY);
104 P(IRQ_AUTODETECT);
105 P(IRQ_WAITING);
106 P(IRQ_LEVEL);
107 P(IRQ_MASKED);
108#ifdef CONFIG_IRQ_PER_CPU
109 P(IRQ_PER_CPU);
110#endif
111 P(IRQ_NOPROBE);
112 P(IRQ_NOREQUEST);
113 P(IRQ_NOAUTOEN);
114}
115
116#undef P
117