Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[linux-btrfs-devel.git] / kernel / irq / internals.h
bloba73dd6c7372da3f1d33ccdd0460ee72e667b534e
1 /*
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.
7 */
8 #include <linux/irqdesc.h>
10 #ifdef CONFIG_SPARSE_IRQ
11 # define IRQ_BITMAP_BITS (NR_IRQS + 8196)
12 #else
13 # define IRQ_BITMAP_BITS NR_IRQS
14 #endif
16 #define istate core_internal_state__do_not_mess_with_it
18 extern int noirqdebug;
21 * Bits used by threaded handlers:
22 * IRQTF_RUNTHREAD - signals that the interrupt handler thread should run
23 * IRQTF_DIED - handler thread died
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
28 enum {
29 IRQTF_RUNTHREAD,
30 IRQTF_DIED,
31 IRQTF_WARNED,
32 IRQTF_AFFINITY,
33 IRQTF_FORCED_THREAD,
37 * Bit masks for desc->state
39 * IRQS_AUTODETECT - autodetection in progress
40 * IRQS_SPURIOUS_DISABLED - was disabled due to spurious interrupt
41 * detection
42 * IRQS_POLL_INPROGRESS - polling in progress
43 * IRQS_ONESHOT - irq is not unmasked in primary handler
44 * IRQS_REPLAY - irq is replayed
45 * IRQS_WAITING - irq is waiting
46 * IRQS_PENDING - irq is pending and replayed later
47 * IRQS_SUSPENDED - irq is suspended
49 enum {
50 IRQS_AUTODETECT = 0x00000001,
51 IRQS_SPURIOUS_DISABLED = 0x00000002,
52 IRQS_POLL_INPROGRESS = 0x00000008,
53 IRQS_ONESHOT = 0x00000020,
54 IRQS_REPLAY = 0x00000040,
55 IRQS_WAITING = 0x00000080,
56 IRQS_PENDING = 0x00000200,
57 IRQS_SUSPENDED = 0x00000800,
60 #include "debug.h"
61 #include "settings.h"
63 #define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data)
65 extern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,
66 unsigned long flags);
67 extern void __disable_irq(struct irq_desc *desc, unsigned int irq, bool susp);
68 extern void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume);
70 extern int irq_startup(struct irq_desc *desc);
71 extern void irq_shutdown(struct irq_desc *desc);
72 extern void irq_enable(struct irq_desc *desc);
73 extern void irq_disable(struct irq_desc *desc);
74 extern void irq_percpu_enable(struct irq_desc *desc, unsigned int cpu);
75 extern void irq_percpu_disable(struct irq_desc *desc, unsigned int cpu);
76 extern void mask_irq(struct irq_desc *desc);
77 extern void unmask_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);
88 #ifdef CONFIG_PROC_FS
89 extern void register_irq_proc(unsigned int irq, struct irq_desc *desc);
90 extern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc);
91 extern void register_handler_proc(unsigned int irq, struct irqaction *action);
92 extern void unregister_handler_proc(unsigned int irq, struct irqaction *action);
93 #else
94 static inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { }
95 static inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { }
96 static inline void register_handler_proc(unsigned int irq,
97 struct irqaction *action) { }
98 static inline void unregister_handler_proc(unsigned int irq,
99 struct irqaction *action) { }
100 #endif
102 extern int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask);
104 extern void irq_set_thread_affinity(struct irq_desc *desc);
106 /* Inline functions for support of irq chips on slow busses */
107 static inline void chip_bus_lock(struct irq_desc *desc)
109 if (unlikely(desc->irq_data.chip->irq_bus_lock))
110 desc->irq_data.chip->irq_bus_lock(&desc->irq_data);
113 static inline void chip_bus_sync_unlock(struct irq_desc *desc)
115 if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock))
116 desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data);
119 #define _IRQ_DESC_CHECK (1 << 0)
120 #define _IRQ_DESC_PERCPU (1 << 1)
122 #define IRQ_GET_DESC_CHECK_GLOBAL (_IRQ_DESC_CHECK)
123 #define IRQ_GET_DESC_CHECK_PERCPU (_IRQ_DESC_CHECK | _IRQ_DESC_PERCPU)
125 struct irq_desc *
126 __irq_get_desc_lock(unsigned int irq, unsigned long *flags, bool bus,
127 unsigned int check);
128 void __irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags, bool bus);
130 static inline struct irq_desc *
131 irq_get_desc_buslock(unsigned int irq, unsigned long *flags, unsigned int check)
133 return __irq_get_desc_lock(irq, flags, true, check);
136 static inline void
137 irq_put_desc_busunlock(struct irq_desc *desc, unsigned long flags)
139 __irq_put_desc_unlock(desc, flags, true);
142 static inline struct irq_desc *
143 irq_get_desc_lock(unsigned int irq, unsigned long *flags, unsigned int check)
145 return __irq_get_desc_lock(irq, flags, false, check);
148 static inline void
149 irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags)
151 __irq_put_desc_unlock(desc, flags, false);
155 * Manipulation functions for irq_data.state
157 static inline void irqd_set_move_pending(struct irq_data *d)
159 d->state_use_accessors |= IRQD_SETAFFINITY_PENDING;
162 static inline void irqd_clr_move_pending(struct irq_data *d)
164 d->state_use_accessors &= ~IRQD_SETAFFINITY_PENDING;
167 static inline void irqd_clear(struct irq_data *d, unsigned int mask)
169 d->state_use_accessors &= ~mask;
172 static inline void irqd_set(struct irq_data *d, unsigned int mask)
174 d->state_use_accessors |= mask;
177 static inline bool irqd_has_set(struct irq_data *d, unsigned int mask)
179 return d->state_use_accessors & mask;