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>
9 #include <linux/kernel_stat.h>
11 #ifdef CONFIG_SPARSE_IRQ
12 # define IRQ_BITMAP_BITS (NR_IRQS + 8196)
14 # define IRQ_BITMAP_BITS NR_IRQS
17 #define istate core_internal_state__do_not_mess_with_it
19 extern bool noirqdebug;
22 * Bits used by threaded handlers:
23 * IRQTF_RUNTHREAD - signals that the interrupt handler thread should run
24 * IRQTF_WARNED - warning "IRQ_WAKE_THREAD w/o thread_fn" has been printed
25 * IRQTF_AFFINITY - irq thread is requested to adjust affinity
26 * IRQTF_FORCED_THREAD - irq action is force threaded
36 * Bit masks for desc->core_internal_state__do_not_mess_with_it
38 * IRQS_AUTODETECT - autodetection in progress
39 * IRQS_SPURIOUS_DISABLED - was disabled due to spurious interrupt
41 * IRQS_POLL_INPROGRESS - polling in progress
42 * IRQS_ONESHOT - irq is not unmasked in primary handler
43 * IRQS_REPLAY - irq is replayed
44 * IRQS_WAITING - irq is waiting
45 * IRQS_PENDING - irq is pending and replayed later
46 * IRQS_SUSPENDED - irq is suspended
49 IRQS_AUTODETECT = 0x00000001,
50 IRQS_SPURIOUS_DISABLED = 0x00000002,
51 IRQS_POLL_INPROGRESS = 0x00000008,
52 IRQS_ONESHOT = 0x00000020,
53 IRQS_REPLAY = 0x00000040,
54 IRQS_WAITING = 0x00000080,
55 IRQS_PENDING = 0x00000200,
56 IRQS_SUSPENDED = 0x00000800,
62 extern int __irq_set_trigger(struct irq_desc *desc, unsigned long flags);
63 extern void __disable_irq(struct irq_desc *desc);
64 extern void __enable_irq(struct irq_desc *desc);
66 extern int irq_startup(struct irq_desc *desc, bool resend);
67 extern void irq_shutdown(struct irq_desc *desc);
68 extern void irq_enable(struct irq_desc *desc);
69 extern void irq_disable(struct irq_desc *desc);
70 extern void irq_percpu_enable(struct irq_desc *desc, unsigned int cpu);
71 extern void irq_percpu_disable(struct irq_desc *desc, unsigned int cpu);
72 extern void mask_irq(struct irq_desc *desc);
73 extern void unmask_irq(struct irq_desc *desc);
74 extern void unmask_threaded_irq(struct irq_desc *desc);
76 #ifdef CONFIG_SPARSE_IRQ
77 static inline void irq_mark_irq(unsigned int irq) { }
79 extern void irq_mark_irq(unsigned int irq);
82 extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr);
84 irqreturn_t handle_irq_event_percpu(struct irq_desc *desc, struct irqaction *action);
85 irqreturn_t handle_irq_event(struct irq_desc *desc);
87 /* Resending of interrupts :*/
88 void check_irq_resend(struct irq_desc *desc);
89 bool irq_wait_for_poll(struct irq_desc *desc);
90 void __irq_wake_thread(struct irq_desc *desc, struct irqaction *action);
93 extern void register_irq_proc(unsigned int irq, struct irq_desc *desc);
94 extern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc);
95 extern void register_handler_proc(unsigned int irq, struct irqaction *action);
96 extern void unregister_handler_proc(unsigned int irq, struct irqaction *action);
98 static inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { }
99 static inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { }
100 static inline void register_handler_proc(unsigned int irq,
101 struct irqaction *action) { }
102 static inline void unregister_handler_proc(unsigned int irq,
103 struct irqaction *action) { }
106 extern int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask);
108 extern void irq_set_thread_affinity(struct irq_desc *desc);
110 extern int irq_do_set_affinity(struct irq_data *data,
111 const struct cpumask *dest, bool force);
113 /* Inline functions for support of irq chips on slow busses */
114 static inline void chip_bus_lock(struct irq_desc *desc)
116 if (unlikely(desc->irq_data.chip->irq_bus_lock))
117 desc->irq_data.chip->irq_bus_lock(&desc->irq_data);
120 static inline void chip_bus_sync_unlock(struct irq_desc *desc)
122 if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock))
123 desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data);
126 #define _IRQ_DESC_CHECK (1 << 0)
127 #define _IRQ_DESC_PERCPU (1 << 1)
129 #define IRQ_GET_DESC_CHECK_GLOBAL (_IRQ_DESC_CHECK)
130 #define IRQ_GET_DESC_CHECK_PERCPU (_IRQ_DESC_CHECK | _IRQ_DESC_PERCPU)
133 __irq_get_desc_lock(unsigned int irq, unsigned long *flags, bool bus,
135 void __irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags, bool bus);
137 static inline struct irq_desc *
138 irq_get_desc_buslock(unsigned int irq, unsigned long *flags, unsigned int check)
140 return __irq_get_desc_lock(irq, flags, true, check);
144 irq_put_desc_busunlock(struct irq_desc *desc, unsigned long flags)
146 __irq_put_desc_unlock(desc, flags, true);
149 static inline struct irq_desc *
150 irq_get_desc_lock(unsigned int irq, unsigned long *flags, unsigned int check)
152 return __irq_get_desc_lock(irq, flags, false, check);
156 irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags)
158 __irq_put_desc_unlock(desc, flags, false);
162 * Manipulation functions for irq_data.state
164 static inline void irqd_set_move_pending(struct irq_data *d)
166 __irqd_to_state(d) |= IRQD_SETAFFINITY_PENDING;
169 static inline void irqd_clr_move_pending(struct irq_data *d)
171 __irqd_to_state(d) &= ~IRQD_SETAFFINITY_PENDING;
174 static inline void irqd_clear(struct irq_data *d, unsigned int mask)
176 __irqd_to_state(d) &= ~mask;
179 static inline void irqd_set(struct irq_data *d, unsigned int mask)
181 __irqd_to_state(d) |= mask;
184 static inline bool irqd_has_set(struct irq_data *d, unsigned int mask)
186 return __irqd_to_state(d) & mask;
189 static inline void kstat_incr_irqs_this_cpu(struct irq_desc *desc)
191 __this_cpu_inc(*desc->kstat_irqs);
192 __this_cpu_inc(kstat.irqs_sum);
195 static inline int irq_desc_get_node(struct irq_desc *desc)
197 return irq_data_get_node(&desc->irq_data);
200 #ifdef CONFIG_PM_SLEEP
201 bool irq_pm_check_wakeup(struct irq_desc *desc);
202 void irq_pm_install_action(struct irq_desc *desc, struct irqaction *action);
203 void irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action);
205 static inline bool irq_pm_check_wakeup(struct irq_desc *desc) { return false; }
207 irq_pm_install_action(struct irq_desc *desc, struct irqaction *action) { }
209 irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action) { }