2 * IRQ subsystem internal functions and variables:
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.
8 #include <linux/irqdesc.h>
10 #ifdef CONFIG_SPARSE_IRQ
11 # define IRQ_BITMAP_BITS (NR_IRQS + 8196)
13 # define IRQ_BITMAP_BITS NR_IRQS
16 #define istate core_internal_state__do_not_mess_with_it
18 #ifdef CONFIG_GENERIC_HARDIRQS_NO_COMPAT
19 # define status status_use_accessors
22 extern int noirqdebug;
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 * IRQTF_FORCED_THREAD - irq action is force threaded
41 * Bit masks for desc->state
43 * IRQS_AUTODETECT - autodetection in progress
44 * IRQS_SPURIOUS_DISABLED - was disabled due to spurious interrupt
46 * IRQS_POLL_INPROGRESS - polling in progress
47 * IRQS_ONESHOT - irq is not unmasked in primary handler
48 * IRQS_REPLAY - irq is replayed
49 * IRQS_WAITING - irq is waiting
50 * IRQS_PENDING - irq is pending and replayed later
51 * IRQS_SUSPENDED - irq is suspended
54 IRQS_AUTODETECT = 0x00000001,
55 IRQS_SPURIOUS_DISABLED = 0x00000002,
56 IRQS_POLL_INPROGRESS = 0x00000008,
57 IRQS_ONESHOT = 0x00000020,
58 IRQS_REPLAY = 0x00000040,
59 IRQS_WAITING = 0x00000080,
60 IRQS_PENDING = 0x00000200,
61 IRQS_SUSPENDED = 0x00000800,
68 #define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data)
70 /* Set default functions for irq_chip structures: */
71 extern void irq_chip_set_defaults(struct irq_chip *chip);
73 extern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,
75 extern void __disable_irq(struct irq_desc *desc, unsigned int irq, bool susp);
76 extern void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume);
78 extern int irq_startup(struct irq_desc *desc);
79 extern void irq_shutdown(struct irq_desc *desc);
80 extern void irq_enable(struct irq_desc *desc);
81 extern void irq_disable(struct irq_desc *desc);
82 extern void mask_irq(struct irq_desc *desc);
83 extern void unmask_irq(struct irq_desc *desc);
85 extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr);
87 irqreturn_t handle_irq_event_percpu(struct irq_desc *desc, struct irqaction *action);
88 irqreturn_t handle_irq_event(struct irq_desc *desc);
90 /* Resending of interrupts :*/
91 void check_irq_resend(struct irq_desc *desc, unsigned int irq);
92 bool irq_wait_for_poll(struct irq_desc *desc);
95 extern void register_irq_proc(unsigned int irq, struct irq_desc *desc);
96 extern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc);
97 extern void register_handler_proc(unsigned int irq, struct irqaction *action);
98 extern void unregister_handler_proc(unsigned int irq, struct irqaction *action);
100 static inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { }
101 static inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { }
102 static inline void register_handler_proc(unsigned int irq,
103 struct irqaction *action) { }
104 static inline void unregister_handler_proc(unsigned int irq,
105 struct irqaction *action) { }
108 extern int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask);
110 extern void irq_set_thread_affinity(struct irq_desc *desc);
112 /* Inline functions for support of irq chips on slow busses */
113 static inline void chip_bus_lock(struct irq_desc *desc)
115 if (unlikely(desc->irq_data.chip->irq_bus_lock))
116 desc->irq_data.chip->irq_bus_lock(&desc->irq_data);
119 static inline void chip_bus_sync_unlock(struct irq_desc *desc)
121 if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock))
122 desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data);
126 __irq_get_desc_lock(unsigned int irq, unsigned long *flags, bool bus);
127 void __irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags, bool bus);
129 static inline struct irq_desc *
130 irq_get_desc_buslock(unsigned int irq, unsigned long *flags)
132 return __irq_get_desc_lock(irq, flags, true);
136 irq_put_desc_busunlock(struct irq_desc *desc, unsigned long flags)
138 __irq_put_desc_unlock(desc, flags, true);
141 static inline struct irq_desc *
142 irq_get_desc_lock(unsigned int irq, unsigned long *flags)
144 return __irq_get_desc_lock(irq, flags, false);
148 irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags)
150 __irq_put_desc_unlock(desc, flags, false);
154 * Manipulation functions for irq_data.state
156 static inline void irqd_set_move_pending(struct irq_data *d)
158 d->state_use_accessors |= IRQD_SETAFFINITY_PENDING;
159 irq_compat_set_move_pending(irq_data_to_desc(d));
162 static inline void irqd_clr_move_pending(struct irq_data *d)
164 d->state_use_accessors &= ~IRQD_SETAFFINITY_PENDING;
165 irq_compat_clr_move_pending(irq_data_to_desc(d));
168 static inline void irqd_clear(struct irq_data *d, unsigned int mask)
170 d->state_use_accessors &= ~mask;
173 static inline void irqd_set(struct irq_data *d, unsigned int mask)
175 d->state_use_accessors |= mask;
178 static inline bool irqd_has_set(struct irq_data *d, unsigned int mask)
180 return d->state_use_accessors & mask;