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
  12 extern 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: */
  17 extern void irq_chip_set_defaults(struct irq_chip *chip);
  18
  19 /* Set default handler: */
  20 extern void compat_irq_chip_set_default_handler(struct irq_desc *desc);
  21
  22 extern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,
  23                 unsigned long flags);
  24 extern void __disable_irq(struct irq_desc *desc, unsigned int irq, bool susp);
  25 extern void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume);
  26
  27 extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr);
  28
  29 /* Resending of interrupts :*/
  30 void check_irq_resend(struct irq_desc *desc, unsigned int irq);
  31
  32 #ifdef CONFIG_PROC_FS
  33 extern void register_irq_proc(unsigned int irq, struct irq_desc *desc);
  34 extern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc);
  35 extern void register_handler_proc(unsigned int irq, struct irqaction *action);
  36 extern void unregister_handler_proc(unsigned int irq, struct irqaction *action);
  37 #else
  38 static inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { }
  39 static inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { }
  40 static inline void register_handler_proc(unsigned int irq,
  41                                          struct irqaction *action) { }
  42 static inline void unregister_handler_proc(unsigned int irq,
  43                                            struct irqaction *action) { }
  44 #endif
  45
  46 extern int irq_select_affinity_usr(unsigned int irq);
  47
  48 extern void irq_set_thread_affinity(struct irq_desc *desc);
  49
  50 #ifndef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED
  51 static 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
  57 static 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 */
  61 static 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
  67 static 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
  81 static 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