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git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - kernel/irq/internals.h
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 int irq
,
64 extern void __disable_irq(struct irq_desc
*desc
, unsigned int irq
);
65 extern void __enable_irq(struct irq_desc
*desc
, unsigned int irq
);
67 extern int irq_startup(struct irq_desc
*desc
, bool resend
);
68 extern void irq_shutdown(struct irq_desc
*desc
);
69 extern void irq_enable(struct irq_desc
*desc
);
70 extern void irq_disable(struct irq_desc
*desc
);
71 extern void irq_percpu_enable(struct irq_desc
*desc
, unsigned int cpu
);
72 extern void irq_percpu_disable(struct irq_desc
*desc
, unsigned int cpu
);
73 extern void mask_irq(struct irq_desc
*desc
);
74 extern void unmask_irq(struct irq_desc
*desc
);
75 extern void unmask_threaded_irq(struct irq_desc
*desc
);
77 #ifdef CONFIG_SPARSE_IRQ
78 static inline void irq_mark_irq(unsigned int irq
) { }
79 extern void irq_lock_sparse(void);
80 extern void irq_unlock_sparse(void);
82 extern void irq_mark_irq(unsigned int irq
);
83 static inline void irq_lock_sparse(void) { }
84 static inline void irq_unlock_sparse(void) { }
87 extern void init_kstat_irqs(struct irq_desc
*desc
, int node
, int nr
);
89 irqreturn_t
handle_irq_event_percpu(struct irq_desc
*desc
, struct irqaction
*action
);
90 irqreturn_t
handle_irq_event(struct irq_desc
*desc
);
92 /* Resending of interrupts :*/
93 void check_irq_resend(struct irq_desc
*desc
, unsigned int irq
);
94 bool irq_wait_for_poll(struct irq_desc
*desc
);
95 void __irq_wake_thread(struct irq_desc
*desc
, struct irqaction
*action
);
98 extern void register_irq_proc(unsigned int irq
, struct irq_desc
*desc
);
99 extern void unregister_irq_proc(unsigned int irq
, struct irq_desc
*desc
);
100 extern void register_handler_proc(unsigned int irq
, struct irqaction
*action
);
101 extern void unregister_handler_proc(unsigned int irq
, struct irqaction
*action
);
103 static inline void register_irq_proc(unsigned int irq
, struct irq_desc
*desc
) { }
104 static inline void unregister_irq_proc(unsigned int irq
, struct irq_desc
*desc
) { }
105 static inline void register_handler_proc(unsigned int irq
,
106 struct irqaction
*action
) { }
107 static inline void unregister_handler_proc(unsigned int irq
,
108 struct irqaction
*action
) { }
111 extern int irq_select_affinity_usr(unsigned int irq
, struct cpumask
*mask
);
113 extern void irq_set_thread_affinity(struct irq_desc
*desc
);
115 extern int irq_do_set_affinity(struct irq_data
*data
,
116 const struct cpumask
*dest
, bool force
);
118 /* Inline functions for support of irq chips on slow busses */
119 static inline void chip_bus_lock(struct irq_desc
*desc
)
121 if (unlikely(desc
->irq_data
.chip
->irq_bus_lock
))
122 desc
->irq_data
.chip
->irq_bus_lock(&desc
->irq_data
);
125 static inline void chip_bus_sync_unlock(struct irq_desc
*desc
)
127 if (unlikely(desc
->irq_data
.chip
->irq_bus_sync_unlock
))
128 desc
->irq_data
.chip
->irq_bus_sync_unlock(&desc
->irq_data
);
131 #define _IRQ_DESC_CHECK (1 << 0)
132 #define _IRQ_DESC_PERCPU (1 << 1)
134 #define IRQ_GET_DESC_CHECK_GLOBAL (_IRQ_DESC_CHECK)
135 #define IRQ_GET_DESC_CHECK_PERCPU (_IRQ_DESC_CHECK | _IRQ_DESC_PERCPU)
138 __irq_get_desc_lock(unsigned int irq
, unsigned long *flags
, bool bus
,
140 void __irq_put_desc_unlock(struct irq_desc
*desc
, unsigned long flags
, bool bus
);
142 static inline struct irq_desc
*
143 irq_get_desc_buslock(unsigned int irq
, unsigned long *flags
, unsigned int check
)
145 return __irq_get_desc_lock(irq
, flags
, true, check
);
149 irq_put_desc_busunlock(struct irq_desc
*desc
, unsigned long flags
)
151 __irq_put_desc_unlock(desc
, flags
, true);
154 static inline struct irq_desc
*
155 irq_get_desc_lock(unsigned int irq
, unsigned long *flags
, unsigned int check
)
157 return __irq_get_desc_lock(irq
, flags
, false, check
);
161 irq_put_desc_unlock(struct irq_desc
*desc
, unsigned long flags
)
163 __irq_put_desc_unlock(desc
, flags
, false);
167 * Manipulation functions for irq_data.state
169 static inline void irqd_set_move_pending(struct irq_data
*d
)
171 __irqd_to_state(d
) |= IRQD_SETAFFINITY_PENDING
;
174 static inline void irqd_clr_move_pending(struct irq_data
*d
)
176 __irqd_to_state(d
) &= ~IRQD_SETAFFINITY_PENDING
;
179 static inline void irqd_clear(struct irq_data
*d
, unsigned int mask
)
181 __irqd_to_state(d
) &= ~mask
;
184 static inline void irqd_set(struct irq_data
*d
, unsigned int mask
)
186 __irqd_to_state(d
) |= mask
;
189 static inline bool irqd_has_set(struct irq_data
*d
, unsigned int mask
)
191 return __irqd_to_state(d
) & mask
;
194 static inline void kstat_incr_irqs_this_cpu(unsigned int irq
, struct irq_desc
*desc
)
196 __this_cpu_inc(*desc
->kstat_irqs
);
197 __this_cpu_inc(kstat
.irqs_sum
);
200 static inline int irq_desc_get_node(struct irq_desc
*desc
)
202 return irq_data_get_node(&desc
->irq_data
);
205 #ifdef CONFIG_PM_SLEEP
206 bool irq_pm_check_wakeup(struct irq_desc
*desc
);
207 void irq_pm_install_action(struct irq_desc
*desc
, struct irqaction
*action
);
208 void irq_pm_remove_action(struct irq_desc
*desc
, struct irqaction
*action
);
210 static inline bool irq_pm_check_wakeup(struct irq_desc
*desc
) { return false; }
212 irq_pm_install_action(struct irq_desc
*desc
, struct irqaction
*action
) { }
214 irq_pm_remove_action(struct irq_desc
*desc
, struct irqaction
*action
) { }