xref: /openbmc/linux/kernel/irq/internals.h (revision b6dcefde)
1 /*
2  * IRQ subsystem internal functions and variables:
3  */
4 
5 extern int noirqdebug;
6 
7 /* Set default functions for irq_chip structures: */
8 extern void irq_chip_set_defaults(struct irq_chip *chip);
9 
10 /* Set default handler: */
11 extern void compat_irq_chip_set_default_handler(struct irq_desc *desc);
12 
13 extern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,
14 		unsigned long flags);
15 extern void __disable_irq(struct irq_desc *desc, unsigned int irq, bool susp);
16 extern void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume);
17 
18 extern struct lock_class_key irq_desc_lock_class;
19 extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr);
20 extern void clear_kstat_irqs(struct irq_desc *desc);
21 extern raw_spinlock_t sparse_irq_lock;
22 
23 #ifdef CONFIG_SPARSE_IRQ
24 /* irq_desc_ptrs allocated at boot time */
25 extern struct irq_desc **irq_desc_ptrs;
26 #else
27 /* irq_desc_ptrs is a fixed size array */
28 extern struct irq_desc *irq_desc_ptrs[NR_IRQS];
29 #endif
30 
31 #ifdef CONFIG_PROC_FS
32 extern void register_irq_proc(unsigned int irq, struct irq_desc *desc);
33 extern void register_handler_proc(unsigned int irq, struct irqaction *action);
34 extern void unregister_handler_proc(unsigned int irq, struct irqaction *action);
35 #else
36 static inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { }
37 static inline void register_handler_proc(unsigned int irq,
38 					 struct irqaction *action) { }
39 static inline void unregister_handler_proc(unsigned int irq,
40 					   struct irqaction *action) { }
41 #endif
42 
43 extern int irq_select_affinity_usr(unsigned int irq);
44 
45 extern void irq_set_thread_affinity(struct irq_desc *desc);
46 
47 /* Inline functions for support of irq chips on slow busses */
48 static inline void chip_bus_lock(unsigned int irq, struct irq_desc *desc)
49 {
50 	if (unlikely(desc->chip->bus_lock))
51 		desc->chip->bus_lock(irq);
52 }
53 
54 static inline void chip_bus_sync_unlock(unsigned int irq, struct irq_desc *desc)
55 {
56 	if (unlikely(desc->chip->bus_sync_unlock))
57 		desc->chip->bus_sync_unlock(irq);
58 }
59 
60 /*
61  * Debugging printout:
62  */
63 
64 #include <linux/kallsyms.h>
65 
66 #define P(f) if (desc->status & f) printk("%14s set\n", #f)
67 
68 static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc)
69 {
70 	printk("irq %d, desc: %p, depth: %d, count: %d, unhandled: %d\n",
71 		irq, desc, desc->depth, desc->irq_count, desc->irqs_unhandled);
72 	printk("->handle_irq():  %p, ", desc->handle_irq);
73 	print_symbol("%s\n", (unsigned long)desc->handle_irq);
74 	printk("->chip(): %p, ", desc->chip);
75 	print_symbol("%s\n", (unsigned long)desc->chip);
76 	printk("->action(): %p\n", desc->action);
77 	if (desc->action) {
78 		printk("->action->handler(): %p, ", desc->action->handler);
79 		print_symbol("%s\n", (unsigned long)desc->action->handler);
80 	}
81 
82 	P(IRQ_INPROGRESS);
83 	P(IRQ_DISABLED);
84 	P(IRQ_PENDING);
85 	P(IRQ_REPLAY);
86 	P(IRQ_AUTODETECT);
87 	P(IRQ_WAITING);
88 	P(IRQ_LEVEL);
89 	P(IRQ_MASKED);
90 #ifdef CONFIG_IRQ_PER_CPU
91 	P(IRQ_PER_CPU);
92 #endif
93 	P(IRQ_NOPROBE);
94 	P(IRQ_NOREQUEST);
95 	P(IRQ_NOAUTOEN);
96 }
97 
98 #undef P
99 
100