internals.h 4.8 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. #define istate core_internal_state__do_not_mess_with_it
  15. #ifdef CONFIG_GENERIC_HARDIRQS_NO_COMPAT
  16. # define status status_use_accessors
  17. #endif
  18. extern int noirqdebug;
  19. /*
  20. * Bits used by threaded handlers:
  21. * IRQTF_RUNTHREAD - signals that the interrupt handler thread should run
  22. * IRQTF_DIED - handler thread died
  23. * IRQTF_WARNED - warning "IRQ_WAKE_THREAD w/o thread_fn" has been printed
  24. * IRQTF_AFFINITY - irq thread is requested to adjust affinity
  25. */
  26. enum {
  27. IRQTF_RUNTHREAD,
  28. IRQTF_DIED,
  29. IRQTF_WARNED,
  30. IRQTF_AFFINITY,
  31. };
  32. /*
  33. * Bit masks for desc->state
  34. *
  35. * IRQS_AUTODETECT - autodetection in progress
  36. * IRQS_SPURIOUS_DISABLED - was disabled due to spurious interrupt
  37. * detection
  38. * IRQS_POLL_INPROGRESS - polling in progress
  39. * IRQS_INPROGRESS - Interrupt in progress
  40. * IRQS_ONESHOT - irq is not unmasked in primary handler
  41. * IRQS_REPLAY - irq is replayed
  42. * IRQS_WAITING - irq is waiting
  43. * IRQS_DISABLED - irq is disabled
  44. * IRQS_PENDING - irq is pending and replayed later
  45. * IRQS_MASKED - irq is masked
  46. * IRQS_SUSPENDED - irq is suspended
  47. */
  48. enum {
  49. IRQS_AUTODETECT = 0x00000001,
  50. IRQS_SPURIOUS_DISABLED = 0x00000002,
  51. IRQS_POLL_INPROGRESS = 0x00000008,
  52. IRQS_INPROGRESS = 0x00000010,
  53. IRQS_ONESHOT = 0x00000020,
  54. IRQS_REPLAY = 0x00000040,
  55. IRQS_WAITING = 0x00000080,
  56. IRQS_DISABLED = 0x00000100,
  57. IRQS_PENDING = 0x00000200,
  58. IRQS_MASKED = 0x00000400,
  59. IRQS_SUSPENDED = 0x00000800,
  60. };
  61. #include "compat.h"
  62. #include "debug.h"
  63. #include "settings.h"
  64. #define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data)
  65. /* Set default functions for irq_chip structures: */
  66. extern void irq_chip_set_defaults(struct irq_chip *chip);
  67. extern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,
  68. unsigned long flags);
  69. extern void __disable_irq(struct irq_desc *desc, unsigned int irq, bool susp);
  70. extern void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume);
  71. extern int irq_startup(struct irq_desc *desc);
  72. extern void irq_shutdown(struct irq_desc *desc);
  73. extern void irq_enable(struct irq_desc *desc);
  74. extern void irq_disable(struct irq_desc *desc);
  75. extern void mask_irq(struct irq_desc *desc);
  76. extern void unmask_irq(struct irq_desc *desc);
  77. extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr);
  78. irqreturn_t handle_irq_event_percpu(struct irq_desc *desc, struct irqaction *action);
  79. irqreturn_t handle_irq_event(struct irq_desc *desc);
  80. /* Resending of interrupts :*/
  81. void check_irq_resend(struct irq_desc *desc, unsigned int irq);
  82. bool irq_wait_for_poll(struct irq_desc *desc);
  83. #ifdef CONFIG_PROC_FS
  84. extern void register_irq_proc(unsigned int irq, struct irq_desc *desc);
  85. extern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc);
  86. extern void register_handler_proc(unsigned int irq, struct irqaction *action);
  87. extern void unregister_handler_proc(unsigned int irq, struct irqaction *action);
  88. #else
  89. static inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { }
  90. static inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { }
  91. static inline void register_handler_proc(unsigned int irq,
  92. struct irqaction *action) { }
  93. static inline void unregister_handler_proc(unsigned int irq,
  94. struct irqaction *action) { }
  95. #endif
  96. extern int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask);
  97. extern void irq_set_thread_affinity(struct irq_desc *desc);
  98. /* Inline functions for support of irq chips on slow busses */
  99. static inline void chip_bus_lock(struct irq_desc *desc)
  100. {
  101. if (unlikely(desc->irq_data.chip->irq_bus_lock))
  102. desc->irq_data.chip->irq_bus_lock(&desc->irq_data);
  103. }
  104. static inline void chip_bus_sync_unlock(struct irq_desc *desc)
  105. {
  106. if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock))
  107. desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data);
  108. }
  109. /*
  110. * Manipulation functions for irq_data.state
  111. */
  112. static inline void irqd_set_move_pending(struct irq_data *d)
  113. {
  114. d->state_use_accessors |= IRQD_SETAFFINITY_PENDING;
  115. irq_compat_set_move_pending(irq_data_to_desc(d));
  116. }
  117. static inline void irqd_clr_move_pending(struct irq_data *d)
  118. {
  119. d->state_use_accessors &= ~IRQD_SETAFFINITY_PENDING;
  120. irq_compat_clr_move_pending(irq_data_to_desc(d));
  121. }
  122. static inline void irqd_clear(struct irq_data *d, unsigned int mask)
  123. {
  124. d->state_use_accessors &= ~mask;
  125. }
  126. static inline void irqd_set(struct irq_data *d, unsigned int mask)
  127. {
  128. d->state_use_accessors |= mask;
  129. }
  130. static inline bool irqd_has_set(struct irq_data *d, unsigned int mask)
  131. {
  132. return d->state_use_accessors & mask;
  133. }