kernel/irq/internals.h

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