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1/*
2 * IRQ subsystem internal functions and variables:
3 *
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>
9#include <linux/kernel_stat.h>
10#include <linux/pm_runtime.h>
11
12#ifdef CONFIG_SPARSE_IRQ
13# define IRQ_BITMAP_BITS (NR_IRQS + 8196)
14#else
15# define IRQ_BITMAP_BITS NR_IRQS
16#endif
17
18#define istate core_internal_state__do_not_mess_with_it
19
20extern bool noirqdebug;
21
22extern struct irqaction chained_action;
23
24/*
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
30 */
31enum {
32 IRQTF_RUNTHREAD,
33 IRQTF_WARNED,
34 IRQTF_AFFINITY,
35 IRQTF_FORCED_THREAD,
36};
37
38/*
39 * Bit masks for desc->core_internal_state__do_not_mess_with_it
40 *
41 * IRQS_AUTODETECT - autodetection in progress
42 * IRQS_SPURIOUS_DISABLED - was disabled due to spurious interrupt
43 * detection
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
50 */
51enum {
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,
60};
61
62#include "debug.h"
63#include "settings.h"
64
65extern int __irq_set_trigger(struct irq_desc *desc, unsigned long flags);
66extern void __disable_irq(struct irq_desc *desc);
67extern void __enable_irq(struct irq_desc *desc);
68
69extern int irq_startup(struct irq_desc *desc, bool resend);
70extern void irq_shutdown(struct irq_desc *desc);
71extern void irq_enable(struct irq_desc *desc);
72extern void irq_disable(struct irq_desc *desc);
73extern void irq_percpu_enable(struct irq_desc *desc, unsigned int cpu);
74extern void irq_percpu_disable(struct irq_desc *desc, unsigned int cpu);
75extern void mask_irq(struct irq_desc *desc);
76extern void unmask_irq(struct irq_desc *desc);
77extern void unmask_threaded_irq(struct irq_desc *desc);
78
79#ifdef CONFIG_SPARSE_IRQ
80static inline void irq_mark_irq(unsigned int irq) { }
81#else
82extern void irq_mark_irq(unsigned int irq);
83#endif
84
85extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr);
86
87irqreturn_t __handle_irq_event_percpu(struct irq_desc *desc, unsigned int *flags);
88irqreturn_t handle_irq_event_percpu(struct irq_desc *desc);
89irqreturn_t handle_irq_event(struct irq_desc *desc);
90
91/* Resending of interrupts :*/
92void check_irq_resend(struct irq_desc *desc);
93bool irq_wait_for_poll(struct irq_desc *desc);
94void __irq_wake_thread(struct irq_desc *desc, struct irqaction *action);
95
96#ifdef CONFIG_PROC_FS
97extern void register_irq_proc(unsigned int irq, struct irq_desc *desc);
98extern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc);
99extern void register_handler_proc(unsigned int irq, struct irqaction *action);
100extern void unregister_handler_proc(unsigned int irq, struct irqaction *action);
101#else
102static inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { }
103static inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { }
104static inline void register_handler_proc(unsigned int irq,
105 struct irqaction *action) { }
106static inline void unregister_handler_proc(unsigned int irq,
107 struct irqaction *action) { }
108#endif
109
110extern bool irq_can_set_affinity_usr(unsigned int irq);
111
112extern int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask);
113
114extern void irq_set_thread_affinity(struct irq_desc *desc);
115
116extern int irq_do_set_affinity(struct irq_data *data,
117 const struct cpumask *dest, bool force);
118
119/* Inline functions for support of irq chips on slow busses */
120static inline void chip_bus_lock(struct irq_desc *desc)
121{
122 if (unlikely(desc->irq_data.chip->irq_bus_lock))
123 desc->irq_data.chip->irq_bus_lock(&desc->irq_data);
124}
125
126static inline void chip_bus_sync_unlock(struct irq_desc *desc)
127{
128 if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock))
129 desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data);
130}
131
132#define _IRQ_DESC_CHECK (1 << 0)
133#define _IRQ_DESC_PERCPU (1 << 1)
134
135#define IRQ_GET_DESC_CHECK_GLOBAL (_IRQ_DESC_CHECK)
136#define IRQ_GET_DESC_CHECK_PERCPU (_IRQ_DESC_CHECK | _IRQ_DESC_PERCPU)
137
138#define for_each_action_of_desc(desc, act) \
139 for (act = desc->act; act; act = act->next)
140
141struct irq_desc *
142__irq_get_desc_lock(unsigned int irq, unsigned long *flags, bool bus,
143 unsigned int check);
144void __irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags, bool bus);
145
146static inline struct irq_desc *
147irq_get_desc_buslock(unsigned int irq, unsigned long *flags, unsigned int check)
148{
149 return __irq_get_desc_lock(irq, flags, true, check);
150}
151
152static inline void
153irq_put_desc_busunlock(struct irq_desc *desc, unsigned long flags)
154{
155 __irq_put_desc_unlock(desc, flags, true);
156}
157
158static inline struct irq_desc *
159irq_get_desc_lock(unsigned int irq, unsigned long *flags, unsigned int check)
160{
161 return __irq_get_desc_lock(irq, flags, false, check);
162}
163
164static inline void
165irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags)
166{
167 __irq_put_desc_unlock(desc, flags, false);
168}
169
170#define __irqd_to_state(d) ACCESS_PRIVATE((d)->common, state_use_accessors)
171
172/*
173 * Manipulation functions for irq_data.state
174 */
175static inline void irqd_set_move_pending(struct irq_data *d)
176{
177 __irqd_to_state(d) |= IRQD_SETAFFINITY_PENDING;
178}
179
180static inline void irqd_clr_move_pending(struct irq_data *d)
181{
182 __irqd_to_state(d) &= ~IRQD_SETAFFINITY_PENDING;
183}
184
185static inline void irqd_clear(struct irq_data *d, unsigned int mask)
186{
187 __irqd_to_state(d) &= ~mask;
188}
189
190static inline void irqd_set(struct irq_data *d, unsigned int mask)
191{
192 __irqd_to_state(d) |= mask;
193}
194
195static inline bool irqd_has_set(struct irq_data *d, unsigned int mask)
196{
197 return __irqd_to_state(d) & mask;
198}
199
200#undef __irqd_to_state
201
202static inline void kstat_incr_irqs_this_cpu(struct irq_desc *desc)
203{
204 __this_cpu_inc(*desc->kstat_irqs);
205 __this_cpu_inc(kstat.irqs_sum);
206}
207
208static inline int irq_desc_get_node(struct irq_desc *desc)
209{
210 return irq_common_data_get_node(&desc->irq_common_data);
211}
212
213static inline int irq_desc_is_chained(struct irq_desc *desc)
214{
215 return (desc->action && desc->action == &chained_action);
216}
217
218#ifdef CONFIG_PM_SLEEP
219bool irq_pm_check_wakeup(struct irq_desc *desc);
220void irq_pm_install_action(struct irq_desc *desc, struct irqaction *action);
221void irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action);
222#else
223static inline bool irq_pm_check_wakeup(struct irq_desc *desc) { return false; }
224static inline void
225irq_pm_install_action(struct irq_desc *desc, struct irqaction *action) { }
226static inline void
227irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action) { }
228#endif
1/*
2 * IRQ subsystem internal functions and variables:
3 *
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>
9
10#ifdef CONFIG_SPARSE_IRQ
11# define IRQ_BITMAP_BITS (NR_IRQS + 8196)
12#else
13# define IRQ_BITMAP_BITS NR_IRQS
14#endif
15
16#define istate core_internal_state__do_not_mess_with_it
17
18extern int noirqdebug;
19
20/*
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
27 */
28enum {
29 IRQTF_RUNTHREAD,
30 IRQTF_DIED,
31 IRQTF_WARNED,
32 IRQTF_AFFINITY,
33 IRQTF_FORCED_THREAD,
34};
35
36/*
37 * Bit masks for desc->state
38 *
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
48 */
49enum {
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,
58};
59
60#include "debug.h"
61#include "settings.h"
62
63#define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data)
64
65extern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,
66 unsigned long flags);
67extern void __disable_irq(struct irq_desc *desc, unsigned int irq, bool susp);
68extern void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume);
69
70extern int irq_startup(struct irq_desc *desc);
71extern void irq_shutdown(struct irq_desc *desc);
72extern void irq_enable(struct irq_desc *desc);
73extern void irq_disable(struct irq_desc *desc);
74extern void mask_irq(struct irq_desc *desc);
75extern void unmask_irq(struct irq_desc *desc);
76
77extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr);
78
79irqreturn_t handle_irq_event_percpu(struct irq_desc *desc, struct irqaction *action);
80irqreturn_t handle_irq_event(struct irq_desc *desc);
81
82/* Resending of interrupts :*/
83void check_irq_resend(struct irq_desc *desc, unsigned int irq);
84bool irq_wait_for_poll(struct irq_desc *desc);
85
86#ifdef CONFIG_PROC_FS
87extern void register_irq_proc(unsigned int irq, struct irq_desc *desc);
88extern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc);
89extern void register_handler_proc(unsigned int irq, struct irqaction *action);
90extern void unregister_handler_proc(unsigned int irq, struct irqaction *action);
91#else
92static inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { }
93static inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { }
94static inline void register_handler_proc(unsigned int irq,
95 struct irqaction *action) { }
96static inline void unregister_handler_proc(unsigned int irq,
97 struct irqaction *action) { }
98#endif
99
100extern int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask);
101
102extern void irq_set_thread_affinity(struct irq_desc *desc);
103
104/* Inline functions for support of irq chips on slow busses */
105static inline void chip_bus_lock(struct irq_desc *desc)
106{
107 if (unlikely(desc->irq_data.chip->irq_bus_lock))
108 desc->irq_data.chip->irq_bus_lock(&desc->irq_data);
109}
110
111static inline void chip_bus_sync_unlock(struct irq_desc *desc)
112{
113 if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock))
114 desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data);
115}
116
117struct irq_desc *
118__irq_get_desc_lock(unsigned int irq, unsigned long *flags, bool bus);
119void __irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags, bool bus);
120
121static inline struct irq_desc *
122irq_get_desc_buslock(unsigned int irq, unsigned long *flags)
123{
124 return __irq_get_desc_lock(irq, flags, true);
125}
126
127static inline void
128irq_put_desc_busunlock(struct irq_desc *desc, unsigned long flags)
129{
130 __irq_put_desc_unlock(desc, flags, true);
131}
132
133static inline struct irq_desc *
134irq_get_desc_lock(unsigned int irq, unsigned long *flags)
135{
136 return __irq_get_desc_lock(irq, flags, false);
137}
138
139static inline void
140irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags)
141{
142 __irq_put_desc_unlock(desc, flags, false);
143}
144
145/*
146 * Manipulation functions for irq_data.state
147 */
148static inline void irqd_set_move_pending(struct irq_data *d)
149{
150 d->state_use_accessors |= IRQD_SETAFFINITY_PENDING;
151}
152
153static inline void irqd_clr_move_pending(struct irq_data *d)
154{
155 d->state_use_accessors &= ~IRQD_SETAFFINITY_PENDING;
156}
157
158static inline void irqd_clear(struct irq_data *d, unsigned int mask)
159{
160 d->state_use_accessors &= ~mask;
161}
162
163static inline void irqd_set(struct irq_data *d, unsigned int mask)
164{
165 d->state_use_accessors |= mask;
166}
167
168static inline bool irqd_has_set(struct irq_data *d, unsigned int mask)
169{
170 return d->state_use_accessors & mask;
171}