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);