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git.proxmox.com Git - mirror_ubuntu-zesty-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->state
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 #define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data)
64 extern int __irq_set_trigger(struct irq_desc
*desc
, unsigned int irq
,
66 extern void __disable_irq(struct irq_desc
*desc
, unsigned int irq
, bool susp
);
67 extern void __enable_irq(struct irq_desc
*desc
, unsigned int irq
, bool resume
);
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 extern void init_kstat_irqs(struct irq_desc
*desc
, int node
, int nr
);
81 irqreturn_t
handle_irq_event_percpu(struct irq_desc
*desc
, struct irqaction
*action
);
82 irqreturn_t
handle_irq_event(struct irq_desc
*desc
);
84 /* Resending of interrupts :*/
85 void check_irq_resend(struct irq_desc
*desc
, unsigned int irq
);
86 bool irq_wait_for_poll(struct irq_desc
*desc
);
87 void __irq_wake_thread(struct irq_desc
*desc
, struct irqaction
*action
);
90 extern void register_irq_proc(unsigned int irq
, struct irq_desc
*desc
);
91 extern void unregister_irq_proc(unsigned int irq
, struct irq_desc
*desc
);
92 extern void register_handler_proc(unsigned int irq
, struct irqaction
*action
);
93 extern void unregister_handler_proc(unsigned int irq
, struct irqaction
*action
);
95 static inline void register_irq_proc(unsigned int irq
, struct irq_desc
*desc
) { }
96 static inline void unregister_irq_proc(unsigned int irq
, struct irq_desc
*desc
) { }
97 static inline void register_handler_proc(unsigned int irq
,
98 struct irqaction
*action
) { }
99 static inline void unregister_handler_proc(unsigned int irq
,
100 struct irqaction
*action
) { }
103 extern int irq_select_affinity_usr(unsigned int irq
, struct cpumask
*mask
);
105 extern void irq_set_thread_affinity(struct irq_desc
*desc
);
107 extern int irq_do_set_affinity(struct irq_data
*data
,
108 const struct cpumask
*dest
, bool force
);
110 /* Inline functions for support of irq chips on slow busses */
111 static inline void chip_bus_lock(struct irq_desc
*desc
)
113 if (unlikely(desc
->irq_data
.chip
->irq_bus_lock
))
114 desc
->irq_data
.chip
->irq_bus_lock(&desc
->irq_data
);
117 static inline void chip_bus_sync_unlock(struct irq_desc
*desc
)
119 if (unlikely(desc
->irq_data
.chip
->irq_bus_sync_unlock
))
120 desc
->irq_data
.chip
->irq_bus_sync_unlock(&desc
->irq_data
);
123 #define _IRQ_DESC_CHECK (1 << 0)
124 #define _IRQ_DESC_PERCPU (1 << 1)
126 #define IRQ_GET_DESC_CHECK_GLOBAL (_IRQ_DESC_CHECK)
127 #define IRQ_GET_DESC_CHECK_PERCPU (_IRQ_DESC_CHECK | _IRQ_DESC_PERCPU)
130 __irq_get_desc_lock(unsigned int irq
, unsigned long *flags
, bool bus
,
132 void __irq_put_desc_unlock(struct irq_desc
*desc
, unsigned long flags
, bool bus
);
134 static inline struct irq_desc
*
135 irq_get_desc_buslock(unsigned int irq
, unsigned long *flags
, unsigned int check
)
137 return __irq_get_desc_lock(irq
, flags
, true, check
);
141 irq_put_desc_busunlock(struct irq_desc
*desc
, unsigned long flags
)
143 __irq_put_desc_unlock(desc
, flags
, true);
146 static inline struct irq_desc
*
147 irq_get_desc_lock(unsigned int irq
, unsigned long *flags
, unsigned int check
)
149 return __irq_get_desc_lock(irq
, flags
, false, check
);
153 irq_put_desc_unlock(struct irq_desc
*desc
, unsigned long flags
)
155 __irq_put_desc_unlock(desc
, flags
, false);
159 * Manipulation functions for irq_data.state
161 static inline void irqd_set_move_pending(struct irq_data
*d
)
163 d
->state_use_accessors
|= IRQD_SETAFFINITY_PENDING
;
166 static inline void irqd_clr_move_pending(struct irq_data
*d
)
168 d
->state_use_accessors
&= ~IRQD_SETAFFINITY_PENDING
;
171 static inline void irqd_clear(struct irq_data
*d
, unsigned int mask
)
173 d
->state_use_accessors
&= ~mask
;
176 static inline void irqd_set(struct irq_data
*d
, unsigned int mask
)
178 d
->state_use_accessors
|= mask
;
181 static inline bool irqd_has_set(struct irq_data
*d
, unsigned int mask
)
183 return d
->state_use_accessors
& mask
;
186 static inline void kstat_incr_irqs_this_cpu(unsigned int irq
, struct irq_desc
*desc
)
188 __this_cpu_inc(*desc
->kstat_irqs
);
189 __this_cpu_inc(kstat
.irqs_sum
);