kernel/irq/internals.h

   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
  10 #ifdef CONFIG_SPARSE_IRQ
  11 # define IRQ_BITMAP_BITS        (NR_IRQS + 8196)
  12 #else
  13 # define IRQ_BITMAP_BITS        NR_IRQS
  14 #endif
  15
  16 #define istate core_internal_state__do_not_mess_with_it
  17
  18 #ifdef CONFIG_GENERIC_HARDIRQS_NO_COMPAT
  19 # define status status_use_accessors
  20 #endif
  21
  22 extern int noirqdebug;
  23
  24 /*
  25  * Bits used by threaded handlers:
  26  * IRQTF_RUNTHREAD - signals that the interrupt handler thread should run
  27  * IRQTF_DIED      - handler thread died
  28  * IRQTF_WARNED    - warning "IRQ_WAKE_THREAD w/o thread_fn" has been printed
  29  * IRQTF_AFFINITY  - irq thread is requested to adjust affinity
  30  */
  31 enum {
  32         IRQTF_RUNTHREAD,
  33         IRQTF_DIED,
  34         IRQTF_WARNED,
  35         IRQTF_AFFINITY,
  36 };
  37
  38 /*
  39  * Bit masks for desc->state
  40  *
  41  * IRQS_AUTODETECT              - autodetection in progress
  42  * IRQS_SPURIOUS_DISABLED       - was disabled due to spurious interrupt
  43  *                                detection
  44  * IRQS_POLL_INPROGRESS         - polling in progress
  45  * IRQS_INPROGRESS              - Interrupt in progress
  46  * IRQS_ONESHOT                 - irq is not unmasked in primary handler
  47  * IRQS_REPLAY                  - irq is replayed
  48  * IRQS_WAITING                 - irq is waiting
  49  * IRQS_DISABLED                - irq is disabled
  50  * IRQS_PENDING                 - irq is pending and replayed later
  51  * IRQS_MASKED                  - irq is masked
  52  * IRQS_SUSPENDED               - irq is suspended
  53  */
  54 enum {
  55         IRQS_AUTODETECT         = 0x00000001,
  56         IRQS_SPURIOUS_DISABLED  = 0x00000002,
  57         IRQS_POLL_INPROGRESS    = 0x00000008,
  58         IRQS_INPROGRESS         = 0x00000010,
  59         IRQS_ONESHOT            = 0x00000020,
  60         IRQS_REPLAY             = 0x00000040,
  61         IRQS_WAITING            = 0x00000080,
  62         IRQS_DISABLED           = 0x00000100,
  63         IRQS_PENDING            = 0x00000200,
  64         IRQS_MASKED             = 0x00000400,
  65         IRQS_SUSPENDED          = 0x00000800,
  66 };
  67
  68 #include "compat.h"
  69 #include "debug.h"
  70 #include "settings.h"
  71
  72 #define irq_data_to_desc(data)  container_of(data, struct irq_desc, irq_data)
  73
  74 /* Set default functions for irq_chip structures: */
  75 extern void irq_chip_set_defaults(struct irq_chip *chip);
  76
  77 extern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,
  78                 unsigned long flags);
  79 extern void __disable_irq(struct irq_desc *desc, unsigned int irq, bool susp);
  80 extern void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume);
  81
  82 extern int irq_startup(struct irq_desc *desc);
  83 extern void irq_shutdown(struct irq_desc *desc);
  84 extern void irq_enable(struct irq_desc *desc);
  85 extern void irq_disable(struct irq_desc *desc);
  86 extern void mask_irq(struct irq_desc *desc);
  87 extern void unmask_irq(struct irq_desc *desc);
  88
  89 extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr);
  90
  91 irqreturn_t handle_irq_event_percpu(struct irq_desc *desc, struct irqaction *action);
  92 irqreturn_t handle_irq_event(struct irq_desc *desc);
  93
  94 /* Resending of interrupts :*/
  95 void check_irq_resend(struct irq_desc *desc, unsigned int irq);
  96 bool irq_wait_for_poll(struct irq_desc *desc);
  97
  98 #ifdef CONFIG_PROC_FS
  99 extern void register_irq_proc(unsigned int irq, struct irq_desc *desc);
 100 extern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc);
 101 extern void register_handler_proc(unsigned int irq, struct irqaction *action);
 102 extern void unregister_handler_proc(unsigned int irq, struct irqaction *action);
 103 #else
 104 static inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { }
 105 static inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { }
 106 static inline void register_handler_proc(unsigned int irq,
 107                                          struct irqaction *action) { }
 108 static inline void unregister_handler_proc(unsigned int irq,
 109                                            struct irqaction *action) { }
 110 #endif
 111
 112 extern int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask);
 113
 114 extern void irq_set_thread_affinity(struct irq_desc *desc);
 115
 116 /* Inline functions for support of irq chips on slow busses */
 117 static inline void chip_bus_lock(struct irq_desc *desc)
 118 {
 119         if (unlikely(desc->irq_data.chip->irq_bus_lock))
 120                 desc->irq_data.chip->irq_bus_lock(&desc->irq_data);
 121 }
 122
 123 static inline void chip_bus_sync_unlock(struct irq_desc *desc)
 124 {
 125         if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock))
 126                 desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data);
 127 }
 128
 129 /*
 130  * Manipulation functions for irq_data.state
 131  */
 132 static inline void irqd_set_move_pending(struct irq_data *d)
 133 {
 134         d->state_use_accessors |= IRQD_SETAFFINITY_PENDING;
 135         irq_compat_set_move_pending(irq_data_to_desc(d));
 136 }
 137
 138 static inline void irqd_clr_move_pending(struct irq_data *d)
 139 {
 140         d->state_use_accessors &= ~IRQD_SETAFFINITY_PENDING;
 141         irq_compat_clr_move_pending(irq_data_to_desc(d));
 142 }
 143
 144 static inline void irqd_clear(struct irq_data *d, unsigned int mask)
 145 {
 146         d->state_use_accessors &= ~mask;
 147 }
 148
 149 static inline void irqd_set(struct irq_data *d, unsigned int mask)
 150 {
 151         d->state_use_accessors |= mask;
 152 }
 153
 154 static inline bool irqd_has_set(struct irq_data *d, unsigned int mask)
 155 {
 156         return d->state_use_accessors & mask;
 157 }