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 /*
  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  */
  21 enum {
  22         IRQTF_RUNTHREAD,
  23         IRQTF_DIED,
  24         IRQTF_WARNED,
  25         IRQTF_AFFINITY,
  26 };
  27
  28 #define irq_data_to_desc(data)  container_of(data, struct irq_desc, irq_data)
  29
  30 /* Set default functions for irq_chip structures: */
  31 extern void irq_chip_set_defaults(struct irq_chip *chip);
  32
  33 /* Set default handler: */
  34 extern void compat_irq_chip_set_default_handler(struct irq_desc *desc);
  35
  36 extern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,
  37                 unsigned long flags);
  38 extern void __disable_irq(struct irq_desc *desc, unsigned int irq, bool susp);
  39 extern void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume);
  40
  41 extern int irq_startup(struct irq_desc *desc);
  42 extern void irq_shutdown(struct irq_desc *desc);
  43 extern void irq_enable(struct irq_desc *desc);
  44 extern void irq_disable(struct irq_desc *desc);
  45
  46 extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr);
  47
  48 /* Resending of interrupts :*/
  49 void check_irq_resend(struct irq_desc *desc, unsigned int irq);
  50 bool irq_wait_for_poll(struct irq_desc *desc);
  51
  52 #ifdef CONFIG_PROC_FS
  53 extern void register_irq_proc(unsigned int irq, struct irq_desc *desc);
  54 extern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc);
  55 extern void register_handler_proc(unsigned int irq, struct irqaction *action);
  56 extern void unregister_handler_proc(unsigned int irq, struct irqaction *action);
  57 #else
  58 static inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { }
  59 static inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { }
  60 static inline void register_handler_proc(unsigned int irq,
  61                                          struct irqaction *action) { }
  62 static inline void unregister_handler_proc(unsigned int irq,
  63                                            struct irqaction *action) { }
  64 #endif
  65
  66 extern int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask);
  67
  68 extern void irq_set_thread_affinity(struct irq_desc *desc);
  69
  70 /* Inline functions for support of irq chips on slow busses */
  71 static inline void chip_bus_lock(struct irq_desc *desc)
  72 {
  73         if (unlikely(desc->irq_data.chip->irq_bus_lock))
  74                 desc->irq_data.chip->irq_bus_lock(&desc->irq_data);
  75 }
  76
  77 static inline void chip_bus_sync_unlock(struct irq_desc *desc)
  78 {
  79         if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock))
  80                 desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data);
  81 }
  82
  83 /*
  84  * Debugging printout:
  85  */
  86
  87 #include <linux/kallsyms.h>
  88
  89 #define P(f) if (desc->status & f) printk("%14s set\n", #f)
  90
  91 static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc)
  92 {
  93         printk("irq %d, desc: %p, depth: %d, count: %d, unhandled: %d\n",
  94                 irq, desc, desc->depth, desc->irq_count, desc->irqs_unhandled);
  95         printk("->handle_irq():  %p, ", desc->handle_irq);
  96         print_symbol("%s\n", (unsigned long)desc->handle_irq);
  97         printk("->irq_data.chip(): %p, ", desc->irq_data.chip);
  98         print_symbol("%s\n", (unsigned long)desc->irq_data.chip);
  99         printk("->action(): %p\n", desc->action);
 100         if (desc->action) {
 101                 printk("->action->handler(): %p, ", desc->action->handler);
 102                 print_symbol("%s\n", (unsigned long)desc->action->handler);
 103         }
 104
 105         P(IRQ_INPROGRESS);
 106         P(IRQ_DISABLED);
 107         P(IRQ_PENDING);
 108         P(IRQ_REPLAY);
 109         P(IRQ_AUTODETECT);
 110         P(IRQ_WAITING);
 111         P(IRQ_LEVEL);
 112         P(IRQ_MASKED);
 113 #ifdef CONFIG_IRQ_PER_CPU
 114         P(IRQ_PER_CPU);
 115 #endif
 116         P(IRQ_NOPROBE);
 117         P(IRQ_NOREQUEST);
 118         P(IRQ_NOAUTOEN);
 119 }
 120
 121 #undef P
 122