kernel/irq/internals.h

   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 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