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
21/*
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
27 */
28enum {
29	IRQTF_RUNTHREAD,
30	IRQTF_WARNED,
31	IRQTF_AFFINITY,
32	IRQTF_FORCED_THREAD,
33};
34
35/*
36 * Bit masks for desc->core_internal_state__do_not_mess_with_it
37 *
38 * IRQS_AUTODETECT		- autodetection in progress
39 * IRQS_SPURIOUS_DISABLED	- was disabled due to spurious interrupt
40 *				  detection
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
47 */
48enum {
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,
57};
58
59#include "debug.h"
60#include "settings.h"
61
62#define irq_data_to_desc(data)	container_of(data, struct irq_desc, irq_data)
63
64extern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,
65		unsigned long flags);
66extern void __disable_irq(struct irq_desc *desc, unsigned int irq);
67extern void __enable_irq(struct irq_desc *desc, unsigned int irq);
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) { }
81extern void irq_lock_sparse(void);
82extern void irq_unlock_sparse(void);
83#else
84extern void irq_mark_irq(unsigned int irq);
85static inline void irq_lock_sparse(void) { }
86static inline void irq_unlock_sparse(void) { }
87#endif
88
89extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr);
90
91irqreturn_t handle_irq_event_percpu(struct irq_desc *desc, struct irqaction *action);
92irqreturn_t handle_irq_event(struct irq_desc *desc);
93
94/* Resending of interrupts :*/
95void check_irq_resend(struct irq_desc *desc, unsigned int irq);
96bool irq_wait_for_poll(struct irq_desc *desc);
97void __irq_wake_thread(struct irq_desc *desc, struct irqaction *action);
98
99#ifdef CONFIG_PROC_FS
100extern void register_irq_proc(unsigned int irq, struct irq_desc *desc);
101extern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc);
102extern void register_handler_proc(unsigned int irq, struct irqaction *action);
103extern void unregister_handler_proc(unsigned int irq, struct irqaction *action);
104#else
105static inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { }
106static inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { }
107static inline void register_handler_proc(unsigned int irq,
108					 struct irqaction *action) { }
109static inline void unregister_handler_proc(unsigned int irq,
110					   struct irqaction *action) { }
111#endif
112
113extern int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask);
114
115extern void irq_set_thread_affinity(struct irq_desc *desc);
116
117extern int irq_do_set_affinity(struct irq_data *data,
118			       const struct cpumask *dest, bool force);
119
120/* Inline functions for support of irq chips on slow busses */
121static inline void chip_bus_lock(struct irq_desc *desc)
122{
123	if (unlikely(desc->irq_data.chip->irq_bus_lock))
124		desc->irq_data.chip->irq_bus_lock(&desc->irq_data);
125}
126
127static inline void chip_bus_sync_unlock(struct irq_desc *desc)
128{
129	if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock))
130		desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data);
131}
132
133#define _IRQ_DESC_CHECK		(1 << 0)
134#define _IRQ_DESC_PERCPU	(1 << 1)
135
136#define IRQ_GET_DESC_CHECK_GLOBAL	(_IRQ_DESC_CHECK)
137#define IRQ_GET_DESC_CHECK_PERCPU	(_IRQ_DESC_CHECK | _IRQ_DESC_PERCPU)
138
139struct irq_desc *
140__irq_get_desc_lock(unsigned int irq, unsigned long *flags, bool bus,
141		    unsigned int check);
142void __irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags, bool bus);
143
144static inline struct irq_desc *
145irq_get_desc_buslock(unsigned int irq, unsigned long *flags, unsigned int check)
146{
147	return __irq_get_desc_lock(irq, flags, true, check);
148}
149
150static inline void
151irq_put_desc_busunlock(struct irq_desc *desc, unsigned long flags)
152{
153	__irq_put_desc_unlock(desc, flags, true);
154}
155
156static inline struct irq_desc *
157irq_get_desc_lock(unsigned int irq, unsigned long *flags, unsigned int check)
158{
159	return __irq_get_desc_lock(irq, flags, false, check);
160}
161
162static inline void
163irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags)
164{
165	__irq_put_desc_unlock(desc, flags, false);
166}
167
168/*
169 * Manipulation functions for irq_data.state
170 */
171static inline void irqd_set_move_pending(struct irq_data *d)
172{
173	d->state_use_accessors |= IRQD_SETAFFINITY_PENDING;
174}
175
176static inline void irqd_clr_move_pending(struct irq_data *d)
177{
178	d->state_use_accessors &= ~IRQD_SETAFFINITY_PENDING;
179}
180
181static inline void irqd_clear(struct irq_data *d, unsigned int mask)
182{
183	d->state_use_accessors &= ~mask;
184}
185
186static inline void irqd_set(struct irq_data *d, unsigned int mask)
187{
188	d->state_use_accessors |= mask;
189}
190
191static inline bool irqd_has_set(struct irq_data *d, unsigned int mask)
192{
193	return d->state_use_accessors & mask;
194}
195
196static inline void kstat_incr_irqs_this_cpu(unsigned int irq, struct irq_desc *desc)
197{
198	__this_cpu_inc(*desc->kstat_irqs);
199	__this_cpu_inc(kstat.irqs_sum);
200}
201
202#ifdef CONFIG_PM_SLEEP
203bool irq_pm_check_wakeup(struct irq_desc *desc);
204void irq_pm_install_action(struct irq_desc *desc, struct irqaction *action);
205void irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action);
206#else
207static inline bool irq_pm_check_wakeup(struct irq_desc *desc) { return false; }
208static inline void
209irq_pm_install_action(struct irq_desc *desc, struct irqaction *action) { }
210static inline void
211irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action) { }
212#endif
213