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git.proxmox.com Git - mirror_ubuntu-bionic-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>
10 #include <linux/pm_runtime.h>
12 #ifdef CONFIG_SPARSE_IRQ
13 # define IRQ_BITMAP_BITS (NR_IRQS + 8196)
15 # define IRQ_BITMAP_BITS NR_IRQS
18 #define istate core_internal_state__do_not_mess_with_it
20 extern bool noirqdebug
;
22 extern struct irqaction chained_action
;
25 * Bits used by threaded handlers:
26 * IRQTF_RUNTHREAD - signals that the interrupt handler thread should run
27 * IRQTF_WARNED - warning "IRQ_WAKE_THREAD w/o thread_fn" has been printed
28 * IRQTF_AFFINITY - irq thread is requested to adjust affinity
29 * IRQTF_FORCED_THREAD - irq action is force threaded
39 * Bit masks for desc->core_internal_state__do_not_mess_with_it
41 * IRQS_AUTODETECT - autodetection in progress
42 * IRQS_SPURIOUS_DISABLED - was disabled due to spurious interrupt
44 * IRQS_POLL_INPROGRESS - polling in progress
45 * IRQS_ONESHOT - irq is not unmasked in primary handler
46 * IRQS_REPLAY - irq is replayed
47 * IRQS_WAITING - irq is waiting
48 * IRQS_PENDING - irq is pending and replayed later
49 * IRQS_SUSPENDED - irq is suspended
52 IRQS_AUTODETECT
= 0x00000001,
53 IRQS_SPURIOUS_DISABLED
= 0x00000002,
54 IRQS_POLL_INPROGRESS
= 0x00000008,
55 IRQS_ONESHOT
= 0x00000020,
56 IRQS_REPLAY
= 0x00000040,
57 IRQS_WAITING
= 0x00000080,
58 IRQS_PENDING
= 0x00000200,
59 IRQS_SUSPENDED
= 0x00000800,
65 extern int __irq_set_trigger(struct irq_desc
*desc
, unsigned long flags
);
66 extern void __disable_irq(struct irq_desc
*desc
);
67 extern void __enable_irq(struct irq_desc
*desc
);
69 extern int irq_startup(struct irq_desc
*desc
, bool resend
);
70 extern void irq_shutdown(struct irq_desc
*desc
);
71 extern void irq_enable(struct irq_desc
*desc
);
72 extern void irq_disable(struct irq_desc
*desc
);
73 extern void irq_percpu_enable(struct irq_desc
*desc
, unsigned int cpu
);
74 extern void irq_percpu_disable(struct irq_desc
*desc
, unsigned int cpu
);
75 extern void mask_irq(struct irq_desc
*desc
);
76 extern void unmask_irq(struct irq_desc
*desc
);
77 extern void unmask_threaded_irq(struct irq_desc
*desc
);
79 #ifdef CONFIG_SPARSE_IRQ
80 static inline void irq_mark_irq(unsigned int irq
) { }
82 extern void irq_mark_irq(unsigned int irq
);
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
);
88 irqreturn_t
handle_irq_event(struct irq_desc
*desc
);
90 /* Resending of interrupts :*/
91 void check_irq_resend(struct irq_desc
*desc
);
92 bool irq_wait_for_poll(struct irq_desc
*desc
);
93 void __irq_wake_thread(struct irq_desc
*desc
, struct irqaction
*action
);
96 extern void register_irq_proc(unsigned int irq
, struct irq_desc
*desc
);
97 extern void unregister_irq_proc(unsigned int irq
, struct irq_desc
*desc
);
98 extern void register_handler_proc(unsigned int irq
, struct irqaction
*action
);
99 extern void unregister_handler_proc(unsigned int irq
, struct irqaction
*action
);
101 static inline void register_irq_proc(unsigned int irq
, struct irq_desc
*desc
) { }
102 static inline void unregister_irq_proc(unsigned int irq
, struct irq_desc
*desc
) { }
103 static inline void register_handler_proc(unsigned int irq
,
104 struct irqaction
*action
) { }
105 static inline void unregister_handler_proc(unsigned int irq
,
106 struct irqaction
*action
) { }
109 extern int irq_select_affinity_usr(unsigned int irq
, struct cpumask
*mask
);
111 extern void irq_set_thread_affinity(struct irq_desc
*desc
);
113 extern int irq_do_set_affinity(struct irq_data
*data
,
114 const struct cpumask
*dest
, bool force
);
116 /* Inline functions for support of irq chips on slow busses */
117 static inline void chip_bus_lock(struct irq_desc
*desc
)
119 if (unlikely(desc
->irq_data
.chip
->irq_bus_lock
))
120 desc
->irq_data
.chip
->irq_bus_lock(&desc
->irq_data
);
123 static inline void chip_bus_sync_unlock(struct irq_desc
*desc
)
125 if (unlikely(desc
->irq_data
.chip
->irq_bus_sync_unlock
))
126 desc
->irq_data
.chip
->irq_bus_sync_unlock(&desc
->irq_data
);
129 #define _IRQ_DESC_CHECK (1 << 0)
130 #define _IRQ_DESC_PERCPU (1 << 1)
132 #define IRQ_GET_DESC_CHECK_GLOBAL (_IRQ_DESC_CHECK)
133 #define IRQ_GET_DESC_CHECK_PERCPU (_IRQ_DESC_CHECK | _IRQ_DESC_PERCPU)
135 #define for_each_action_of_desc(desc, act) \
136 for (act = desc->act; act; act = act->next)
139 __irq_get_desc_lock(unsigned int irq
, unsigned long *flags
, bool bus
,
141 void __irq_put_desc_unlock(struct irq_desc
*desc
, unsigned long flags
, bool bus
);
143 static inline struct irq_desc
*
144 irq_get_desc_buslock(unsigned int irq
, unsigned long *flags
, unsigned int check
)
146 return __irq_get_desc_lock(irq
, flags
, true, check
);
150 irq_put_desc_busunlock(struct irq_desc
*desc
, unsigned long flags
)
152 __irq_put_desc_unlock(desc
, flags
, true);
155 static inline struct irq_desc
*
156 irq_get_desc_lock(unsigned int irq
, unsigned long *flags
, unsigned int check
)
158 return __irq_get_desc_lock(irq
, flags
, false, check
);
162 irq_put_desc_unlock(struct irq_desc
*desc
, unsigned long flags
)
164 __irq_put_desc_unlock(desc
, flags
, false);
167 #define __irqd_to_state(d) ACCESS_PRIVATE((d)->common, state_use_accessors)
170 * Manipulation functions for irq_data.state
172 static inline void irqd_set_move_pending(struct irq_data
*d
)
174 __irqd_to_state(d
) |= IRQD_SETAFFINITY_PENDING
;
177 static inline void irqd_clr_move_pending(struct irq_data
*d
)
179 __irqd_to_state(d
) &= ~IRQD_SETAFFINITY_PENDING
;
182 static inline void irqd_clear(struct irq_data
*d
, unsigned int mask
)
184 __irqd_to_state(d
) &= ~mask
;
187 static inline void irqd_set(struct irq_data
*d
, unsigned int mask
)
189 __irqd_to_state(d
) |= mask
;
192 static inline bool irqd_has_set(struct irq_data
*d
, unsigned int mask
)
194 return __irqd_to_state(d
) & mask
;
197 #undef __irqd_to_state
199 static inline void kstat_incr_irqs_this_cpu(struct irq_desc
*desc
)
201 __this_cpu_inc(*desc
->kstat_irqs
);
202 __this_cpu_inc(kstat
.irqs_sum
);
205 static inline int irq_desc_get_node(struct irq_desc
*desc
)
207 return irq_common_data_get_node(&desc
->irq_common_data
);
210 static inline int irq_desc_is_chained(struct irq_desc
*desc
)
212 return (desc
->action
&& desc
->action
== &chained_action
);
215 #ifdef CONFIG_PM_SLEEP
216 bool irq_pm_check_wakeup(struct irq_desc
*desc
);
217 void irq_pm_install_action(struct irq_desc
*desc
, struct irqaction
*action
);
218 void irq_pm_remove_action(struct irq_desc
*desc
, struct irqaction
*action
);
220 static inline bool irq_pm_check_wakeup(struct irq_desc
*desc
) { return false; }
222 irq_pm_install_action(struct irq_desc
*desc
, struct irqaction
*action
) { }
224 irq_pm_remove_action(struct irq_desc
*desc
, struct irqaction
*action
) { }