internals.h 4.1 KB

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  1. /*
  2. * IRQ subsystem internal functions and variables:
  3. *
  4. * Do not ever include this file from anything else than
  5. * kernel/irq/. Do not even think about using any information outside
  6. * of this file for your non core code.
  7. */
  8. #include <linux/irqdesc.h>
  9. #ifdef CONFIG_SPARSE_IRQ
  10. # define IRQ_BITMAP_BITS (NR_IRQS + 8196)
  11. #else
  12. # define IRQ_BITMAP_BITS NR_IRQS
  13. #endif
  14. #include "settings.h"
  15. #define istate core_internal_state__do_not_mess_with_it
  16. extern int noirqdebug;
  17. /*
  18. * Bits used by threaded handlers:
  19. * IRQTF_RUNTHREAD - signals that the interrupt handler thread should run
  20. * IRQTF_DIED - handler thread died
  21. * IRQTF_WARNED - warning "IRQ_WAKE_THREAD w/o thread_fn" has been printed
  22. * IRQTF_AFFINITY - irq thread is requested to adjust affinity
  23. */
  24. enum {
  25. IRQTF_RUNTHREAD,
  26. IRQTF_DIED,
  27. IRQTF_WARNED,
  28. IRQTF_AFFINITY,
  29. };
  30. #define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data)
  31. /* Set default functions for irq_chip structures: */
  32. extern void irq_chip_set_defaults(struct irq_chip *chip);
  33. /* Set default handler: */
  34. extern void compat_irq_chip_set_default_handler(struct irq_desc *desc);
  35. extern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,
  36. unsigned long flags);
  37. extern void __disable_irq(struct irq_desc *desc, unsigned int irq, bool susp);
  38. extern void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume);
  39. extern int irq_startup(struct irq_desc *desc);
  40. extern void irq_shutdown(struct irq_desc *desc);
  41. extern void irq_enable(struct irq_desc *desc);
  42. extern void irq_disable(struct irq_desc *desc);
  43. extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr);
  44. irqreturn_t handle_irq_event_percpu(struct irq_desc *desc, struct irqaction *action);
  45. irqreturn_t handle_irq_event(struct irq_desc *desc);
  46. /* Resending of interrupts :*/
  47. void check_irq_resend(struct irq_desc *desc, unsigned int irq);
  48. bool irq_wait_for_poll(struct irq_desc *desc);
  49. #ifdef CONFIG_PROC_FS
  50. extern void register_irq_proc(unsigned int irq, struct irq_desc *desc);
  51. extern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc);
  52. extern void register_handler_proc(unsigned int irq, struct irqaction *action);
  53. extern void unregister_handler_proc(unsigned int irq, struct irqaction *action);
  54. #else
  55. static inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { }
  56. static inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { }
  57. static inline void register_handler_proc(unsigned int irq,
  58. struct irqaction *action) { }
  59. static inline void unregister_handler_proc(unsigned int irq,
  60. struct irqaction *action) { }
  61. #endif
  62. extern int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask);
  63. extern void irq_set_thread_affinity(struct irq_desc *desc);
  64. /* Inline functions for support of irq chips on slow busses */
  65. static inline void chip_bus_lock(struct irq_desc *desc)
  66. {
  67. if (unlikely(desc->irq_data.chip->irq_bus_lock))
  68. desc->irq_data.chip->irq_bus_lock(&desc->irq_data);
  69. }
  70. static inline void chip_bus_sync_unlock(struct irq_desc *desc)
  71. {
  72. if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock))
  73. desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data);
  74. }
  75. /*
  76. * Debugging printout:
  77. */
  78. #include <linux/kallsyms.h>
  79. #define P(f) if (desc->status & f) printk("%14s set\n", #f)
  80. static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc)
  81. {
  82. printk("irq %d, desc: %p, depth: %d, count: %d, unhandled: %d\n",
  83. irq, desc, desc->depth, desc->irq_count, desc->irqs_unhandled);
  84. printk("->handle_irq(): %p, ", desc->handle_irq);
  85. print_symbol("%s\n", (unsigned long)desc->handle_irq);
  86. printk("->irq_data.chip(): %p, ", desc->irq_data.chip);
  87. print_symbol("%s\n", (unsigned long)desc->irq_data.chip);
  88. printk("->action(): %p\n", desc->action);
  89. if (desc->action) {
  90. printk("->action->handler(): %p, ", desc->action->handler);
  91. print_symbol("%s\n", (unsigned long)desc->action->handler);
  92. }
  93. P(IRQ_INPROGRESS);
  94. P(IRQ_DISABLED);
  95. P(IRQ_PENDING);
  96. P(IRQ_REPLAY);
  97. P(IRQ_AUTODETECT);
  98. P(IRQ_WAITING);
  99. P(IRQ_LEVEL);
  100. P(IRQ_MASKED);
  101. #ifdef CONFIG_IRQ_PER_CPU
  102. P(IRQ_PER_CPU);
  103. #endif
  104. P(IRQ_NOPROBE);
  105. P(IRQ_NOREQUEST);
  106. P(IRQ_NOAUTOEN);
  107. }
  108. #undef P