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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
11#ifdef CONFIG_SPARSE_IRQ
12# define IRQ_BITMAP_BITS (NR_IRQS + 8196)
13#else
14# define IRQ_BITMAP_BITS NR_IRQS
15#endif
16
17#define istate core_internal_state__do_not_mess_with_it
18
19extern bool noirqdebug;
20
21extern struct irqaction chained_action;
22
23/*
24 * Bits used by threaded handlers:
25 * IRQTF_RUNTHREAD - signals that the interrupt handler thread should run
26 * IRQTF_WARNED - warning "IRQ_WAKE_THREAD w/o thread_fn" has been printed
27 * IRQTF_AFFINITY - irq thread is requested to adjust affinity
28 * IRQTF_FORCED_THREAD - irq action is force threaded
29 */
30enum {
31 IRQTF_RUNTHREAD,
32 IRQTF_WARNED,
33 IRQTF_AFFINITY,
34 IRQTF_FORCED_THREAD,
35};
36
37/*
38 * Bit masks for desc->core_internal_state__do_not_mess_with_it
39 *
40 * IRQS_AUTODETECT - autodetection in progress
41 * IRQS_SPURIOUS_DISABLED - was disabled due to spurious interrupt
42 * detection
43 * IRQS_POLL_INPROGRESS - polling in progress
44 * IRQS_ONESHOT - irq is not unmasked in primary handler
45 * IRQS_REPLAY - irq is replayed
46 * IRQS_WAITING - irq is waiting
47 * IRQS_PENDING - irq is pending and replayed later
48 * IRQS_SUSPENDED - irq is suspended
49 */
50enum {
51 IRQS_AUTODETECT = 0x00000001,
52 IRQS_SPURIOUS_DISABLED = 0x00000002,
53 IRQS_POLL_INPROGRESS = 0x00000008,
54 IRQS_ONESHOT = 0x00000020,
55 IRQS_REPLAY = 0x00000040,
56 IRQS_WAITING = 0x00000080,
57 IRQS_PENDING = 0x00000200,
58 IRQS_SUSPENDED = 0x00000800,
59};
60
61#include "debug.h"
62#include "settings.h"
63
64extern int __irq_set_trigger(struct irq_desc *desc, unsigned long flags);
65extern void __disable_irq(struct irq_desc *desc);
66extern void __enable_irq(struct irq_desc *desc);
67
68extern int irq_startup(struct irq_desc *desc, bool resend);
69extern void irq_shutdown(struct irq_desc *desc);
70extern void irq_enable(struct irq_desc *desc);
71extern void irq_disable(struct irq_desc *desc);
72extern void irq_percpu_enable(struct irq_desc *desc, unsigned int cpu);
73extern void irq_percpu_disable(struct irq_desc *desc, unsigned int cpu);
74extern void mask_irq(struct irq_desc *desc);
75extern void unmask_irq(struct irq_desc *desc);
76extern void unmask_threaded_irq(struct irq_desc *desc);
77
78#ifdef CONFIG_SPARSE_IRQ
79static inline void irq_mark_irq(unsigned int irq) { }
80#else
81extern void irq_mark_irq(unsigned int irq);
82#endif
83
84extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr);
85
86irqreturn_t handle_irq_event_percpu(struct irq_desc *desc);
87irqreturn_t handle_irq_event(struct irq_desc *desc);
88
89/* Resending of interrupts :*/
90void check_irq_resend(struct irq_desc *desc);
91bool irq_wait_for_poll(struct irq_desc *desc);
92void __irq_wake_thread(struct irq_desc *desc, struct irqaction *action);
93
94#ifdef CONFIG_PROC_FS
95extern void register_irq_proc(unsigned int irq, struct irq_desc *desc);
96extern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc);
97extern void register_handler_proc(unsigned int irq, struct irqaction *action);
98extern void unregister_handler_proc(unsigned int irq, struct irqaction *action);
99#else
100static inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { }
101static inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { }
102static inline void register_handler_proc(unsigned int irq,
103 struct irqaction *action) { }
104static inline void unregister_handler_proc(unsigned int irq,
105 struct irqaction *action) { }
106#endif
107
108extern int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask);
109
110extern void irq_set_thread_affinity(struct irq_desc *desc);
111
112extern int irq_do_set_affinity(struct irq_data *data,
113 const struct cpumask *dest, bool force);
114
115/* Inline functions for support of irq chips on slow busses */
116static inline void chip_bus_lock(struct irq_desc *desc)
117{
118 if (unlikely(desc->irq_data.chip->irq_bus_lock))
119 desc->irq_data.chip->irq_bus_lock(&desc->irq_data);
120}
121
122static inline void chip_bus_sync_unlock(struct irq_desc *desc)
123{
124 if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock))
125 desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data);
126}
127
128#define _IRQ_DESC_CHECK (1 << 0)
129#define _IRQ_DESC_PERCPU (1 << 1)
130
131#define IRQ_GET_DESC_CHECK_GLOBAL (_IRQ_DESC_CHECK)
132#define IRQ_GET_DESC_CHECK_PERCPU (_IRQ_DESC_CHECK | _IRQ_DESC_PERCPU)
133
134#define for_each_action_of_desc(desc, act) \
135 for (act = desc->act; act; act = act->next)
136
137struct irq_desc *
138__irq_get_desc_lock(unsigned int irq, unsigned long *flags, bool bus,
139 unsigned int check);
140void __irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags, bool bus);
141
142static inline struct irq_desc *
143irq_get_desc_buslock(unsigned int irq, unsigned long *flags, unsigned int check)
144{
145 return __irq_get_desc_lock(irq, flags, true, check);
146}
147
148static inline void
149irq_put_desc_busunlock(struct irq_desc *desc, unsigned long flags)
150{
151 __irq_put_desc_unlock(desc, flags, true);
152}
153
154static inline struct irq_desc *
155irq_get_desc_lock(unsigned int irq, unsigned long *flags, unsigned int check)
156{
157 return __irq_get_desc_lock(irq, flags, false, check);
158}
159
160static inline void
161irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags)
162{
163 __irq_put_desc_unlock(desc, flags, false);
164}
165
166#define __irqd_to_state(d) ACCESS_PRIVATE((d)->common, state_use_accessors)
167
168/*
169 * Manipulation functions for irq_data.state
170 */
171static inline void irqd_set_move_pending(struct irq_data *d)
172{
173 __irqd_to_state(d) |= IRQD_SETAFFINITY_PENDING;
174}
175
176static inline void irqd_clr_move_pending(struct irq_data *d)
177{
178 __irqd_to_state(d) &= ~IRQD_SETAFFINITY_PENDING;
179}
180
181static inline void irqd_clear(struct irq_data *d, unsigned int mask)
182{
183 __irqd_to_state(d) &= ~mask;
184}
185
186static inline void irqd_set(struct irq_data *d, unsigned int mask)
187{
188 __irqd_to_state(d) |= mask;
189}
190
191static inline bool irqd_has_set(struct irq_data *d, unsigned int mask)
192{
193 return __irqd_to_state(d) & mask;
194}
195
196#undef __irqd_to_state
197
198static inline void kstat_incr_irqs_this_cpu(struct irq_desc *desc)
199{
200 __this_cpu_inc(*desc->kstat_irqs);
201 __this_cpu_inc(kstat.irqs_sum);
202}
203
204static inline int irq_desc_get_node(struct irq_desc *desc)
205{
206 return irq_common_data_get_node(&desc->irq_common_data);
207}
208
209static inline int irq_desc_is_chained(struct irq_desc *desc)
210{
211 return (desc->action && desc->action == &chained_action);
212}
213
214#ifdef CONFIG_PM_SLEEP
215bool irq_pm_check_wakeup(struct irq_desc *desc);
216void irq_pm_install_action(struct irq_desc *desc, struct irqaction *action);
217void irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action);
218#else
219static inline bool irq_pm_check_wakeup(struct irq_desc *desc) { return false; }
220static inline void
221irq_pm_install_action(struct irq_desc *desc, struct irqaction *action) { }
222static inline void
223irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action) { }
224#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 bool noirqdebug;
19
20/*
21 * Bits used by threaded handlers:
22 * IRQTF_RUNTHREAD - signals that the interrupt handler thread should run
23 * IRQTF_WARNED - warning "IRQ_WAKE_THREAD w/o thread_fn" has been printed
24 * IRQTF_AFFINITY - irq thread is requested to adjust affinity
25 * IRQTF_FORCED_THREAD - irq action is force threaded
26 */
27enum {
28 IRQTF_RUNTHREAD,
29 IRQTF_WARNED,
30 IRQTF_AFFINITY,
31 IRQTF_FORCED_THREAD,
32};
33
34/*
35 * Bit masks for desc->state
36 *
37 * IRQS_AUTODETECT - autodetection in progress
38 * IRQS_SPURIOUS_DISABLED - was disabled due to spurious interrupt
39 * detection
40 * IRQS_POLL_INPROGRESS - polling in progress
41 * IRQS_ONESHOT - irq is not unmasked in primary handler
42 * IRQS_REPLAY - irq is replayed
43 * IRQS_WAITING - irq is waiting
44 * IRQS_PENDING - irq is pending and replayed later
45 * IRQS_SUSPENDED - irq is suspended
46 */
47enum {
48 IRQS_AUTODETECT = 0x00000001,
49 IRQS_SPURIOUS_DISABLED = 0x00000002,
50 IRQS_POLL_INPROGRESS = 0x00000008,
51 IRQS_ONESHOT = 0x00000020,
52 IRQS_REPLAY = 0x00000040,
53 IRQS_WAITING = 0x00000080,
54 IRQS_PENDING = 0x00000200,
55 IRQS_SUSPENDED = 0x00000800,
56};
57
58#include "debug.h"
59#include "settings.h"
60
61#define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data)
62
63extern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,
64 unsigned long flags);
65extern void __disable_irq(struct irq_desc *desc, unsigned int irq, bool susp);
66extern void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume);
67
68extern int irq_startup(struct irq_desc *desc, bool resend);
69extern void irq_shutdown(struct irq_desc *desc);
70extern void irq_enable(struct irq_desc *desc);
71extern void irq_disable(struct irq_desc *desc);
72extern void irq_percpu_enable(struct irq_desc *desc, unsigned int cpu);
73extern void irq_percpu_disable(struct irq_desc *desc, unsigned int cpu);
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
104extern int irq_do_set_affinity(struct irq_data *data,
105 const struct cpumask *dest, bool force);
106
107/* Inline functions for support of irq chips on slow busses */
108static inline void chip_bus_lock(struct irq_desc *desc)
109{
110 if (unlikely(desc->irq_data.chip->irq_bus_lock))
111 desc->irq_data.chip->irq_bus_lock(&desc->irq_data);
112}
113
114static inline void chip_bus_sync_unlock(struct irq_desc *desc)
115{
116 if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock))
117 desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data);
118}
119
120#define _IRQ_DESC_CHECK (1 << 0)
121#define _IRQ_DESC_PERCPU (1 << 1)
122
123#define IRQ_GET_DESC_CHECK_GLOBAL (_IRQ_DESC_CHECK)
124#define IRQ_GET_DESC_CHECK_PERCPU (_IRQ_DESC_CHECK | _IRQ_DESC_PERCPU)
125
126struct irq_desc *
127__irq_get_desc_lock(unsigned int irq, unsigned long *flags, bool bus,
128 unsigned int check);
129void __irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags, bool bus);
130
131static inline struct irq_desc *
132irq_get_desc_buslock(unsigned int irq, unsigned long *flags, unsigned int check)
133{
134 return __irq_get_desc_lock(irq, flags, true, check);
135}
136
137static inline void
138irq_put_desc_busunlock(struct irq_desc *desc, unsigned long flags)
139{
140 __irq_put_desc_unlock(desc, flags, true);
141}
142
143static inline struct irq_desc *
144irq_get_desc_lock(unsigned int irq, unsigned long *flags, unsigned int check)
145{
146 return __irq_get_desc_lock(irq, flags, false, check);
147}
148
149static inline void
150irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags)
151{
152 __irq_put_desc_unlock(desc, flags, false);
153}
154
155/*
156 * Manipulation functions for irq_data.state
157 */
158static inline void irqd_set_move_pending(struct irq_data *d)
159{
160 d->state_use_accessors |= IRQD_SETAFFINITY_PENDING;
161}
162
163static inline void irqd_clr_move_pending(struct irq_data *d)
164{
165 d->state_use_accessors &= ~IRQD_SETAFFINITY_PENDING;
166}
167
168static inline void irqd_clear(struct irq_data *d, unsigned int mask)
169{
170 d->state_use_accessors &= ~mask;
171}
172
173static inline void irqd_set(struct irq_data *d, unsigned int mask)
174{
175 d->state_use_accessors |= mask;
176}
177
178static inline bool irqd_has_set(struct irq_data *d, unsigned int mask)
179{
180 return d->state_use_accessors & mask;
181}