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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * IRQ subsystem internal functions and variables: | |
dbec07ba TG |
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. | |
1da177e4 | 7 | */ |
e144710b | 8 | #include <linux/irqdesc.h> |
8f945a33 | 9 | #include <linux/kernel_stat.h> |
be45beb2 | 10 | #include <linux/pm_runtime.h> |
1da177e4 | 11 | |
c1ee6264 TG |
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 | ||
dbec07ba TG |
18 | #define istate core_internal_state__do_not_mess_with_it |
19 | ||
2329abfa | 20 | extern bool noirqdebug; |
1da177e4 | 21 | |
e509bd7d MW |
22 | extern struct irqaction chained_action; |
23 | ||
1535dfac TG |
24 | /* |
25 | * Bits used by threaded handlers: | |
26 | * IRQTF_RUNTHREAD - signals that the interrupt handler thread should run | |
1535dfac TG |
27 | * IRQTF_WARNED - warning "IRQ_WAKE_THREAD w/o thread_fn" has been printed |
28 | * IRQTF_AFFINITY - irq thread is requested to adjust affinity | |
8d32a307 | 29 | * IRQTF_FORCED_THREAD - irq action is force threaded |
1535dfac TG |
30 | */ |
31 | enum { | |
32 | IRQTF_RUNTHREAD, | |
1535dfac TG |
33 | IRQTF_WARNED, |
34 | IRQTF_AFFINITY, | |
8d32a307 | 35 | IRQTF_FORCED_THREAD, |
1535dfac TG |
36 | }; |
37 | ||
bd062e76 | 38 | /* |
a257954b | 39 | * Bit masks for desc->core_internal_state__do_not_mess_with_it |
bd062e76 TG |
40 | * |
41 | * IRQS_AUTODETECT - autodetection in progress | |
7acdd53e TG |
42 | * IRQS_SPURIOUS_DISABLED - was disabled due to spurious interrupt |
43 | * detection | |
6954b75b | 44 | * IRQS_POLL_INPROGRESS - polling in progress |
3d67baec | 45 | * IRQS_ONESHOT - irq is not unmasked in primary handler |
163ef309 TG |
46 | * IRQS_REPLAY - irq is replayed |
47 | * IRQS_WAITING - irq is waiting | |
2a0d6fb3 | 48 | * IRQS_PENDING - irq is pending and replayed later |
c531e836 | 49 | * IRQS_SUSPENDED - irq is suspended |
bd062e76 TG |
50 | */ |
51 | enum { | |
52 | IRQS_AUTODETECT = 0x00000001, | |
7acdd53e | 53 | IRQS_SPURIOUS_DISABLED = 0x00000002, |
6954b75b | 54 | IRQS_POLL_INPROGRESS = 0x00000008, |
3d67baec | 55 | IRQS_ONESHOT = 0x00000020, |
163ef309 TG |
56 | IRQS_REPLAY = 0x00000040, |
57 | IRQS_WAITING = 0x00000080, | |
2a0d6fb3 | 58 | IRQS_PENDING = 0x00000200, |
c531e836 | 59 | IRQS_SUSPENDED = 0x00000800, |
bd062e76 TG |
60 | }; |
61 | ||
1ce6068d TG |
62 | #include "debug.h" |
63 | #include "settings.h" | |
64 | ||
a1ff541a | 65 | extern int __irq_set_trigger(struct irq_desc *desc, unsigned long flags); |
79ff1cda JL |
66 | extern void __disable_irq(struct irq_desc *desc); |
67 | extern void __enable_irq(struct irq_desc *desc); | |
0c5d1eb7 | 68 | |
b4bc724e | 69 | extern int irq_startup(struct irq_desc *desc, bool resend); |
46999238 | 70 | extern void irq_shutdown(struct irq_desc *desc); |
87923470 TG |
71 | extern void irq_enable(struct irq_desc *desc); |
72 | extern void irq_disable(struct irq_desc *desc); | |
31d9d9b6 MZ |
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); | |
d4d5e089 TG |
75 | extern void mask_irq(struct irq_desc *desc); |
76 | extern void unmask_irq(struct irq_desc *desc); | |
328a4978 | 77 | extern void unmask_threaded_irq(struct irq_desc *desc); |
46999238 | 78 | |
f63b6a05 TG |
79 | #ifdef CONFIG_SPARSE_IRQ |
80 | static inline void irq_mark_irq(unsigned int irq) { } | |
81 | #else | |
82 | extern void irq_mark_irq(unsigned int irq); | |
83 | #endif | |
84 | ||
85ac16d0 | 85 | extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr); |
0fa0ebbf | 86 | |
edd14cfe | 87 | irqreturn_t __handle_irq_event_percpu(struct irq_desc *desc, unsigned int *flags); |
71f64340 | 88 | irqreturn_t handle_irq_event_percpu(struct irq_desc *desc); |
4912609f TG |
89 | irqreturn_t handle_irq_event(struct irq_desc *desc); |
90 | ||
e144710b | 91 | /* Resending of interrupts :*/ |
0798abeb | 92 | void check_irq_resend(struct irq_desc *desc); |
fe200ae4 | 93 | bool irq_wait_for_poll(struct irq_desc *desc); |
a92444c6 | 94 | void __irq_wake_thread(struct irq_desc *desc, struct irqaction *action); |
e144710b | 95 | |
1da177e4 | 96 | #ifdef CONFIG_PROC_FS |
2c6927a3 | 97 | extern void register_irq_proc(unsigned int irq, struct irq_desc *desc); |
13bfe99e | 98 | extern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc); |
1da177e4 LT |
99 | extern void register_handler_proc(unsigned int irq, struct irqaction *action); |
100 | extern void unregister_handler_proc(unsigned int irq, struct irqaction *action); | |
101 | #else | |
2c6927a3 | 102 | static inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { } |
13bfe99e | 103 | static inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { } |
1da177e4 LT |
104 | static inline void register_handler_proc(unsigned int irq, |
105 | struct irqaction *action) { } | |
106 | static inline void unregister_handler_proc(unsigned int irq, | |
107 | struct irqaction *action) { } | |
108 | #endif | |
109 | ||
9c255583 TG |
110 | extern bool irq_can_set_affinity_usr(unsigned int irq); |
111 | ||
3b8249e7 | 112 | extern int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask); |
f6d87f4b | 113 | |
591d2fb0 | 114 | extern void irq_set_thread_affinity(struct irq_desc *desc); |
57b150cc | 115 | |
818b0f3b JL |
116 | extern int irq_do_set_affinity(struct irq_data *data, |
117 | const struct cpumask *dest, bool force); | |
118 | ||
70aedd24 | 119 | /* Inline functions for support of irq chips on slow busses */ |
3876ec9e | 120 | static inline void chip_bus_lock(struct irq_desc *desc) |
70aedd24 | 121 | { |
3876ec9e TG |
122 | if (unlikely(desc->irq_data.chip->irq_bus_lock)) |
123 | desc->irq_data.chip->irq_bus_lock(&desc->irq_data); | |
70aedd24 TG |
124 | } |
125 | ||
3876ec9e | 126 | static inline void chip_bus_sync_unlock(struct irq_desc *desc) |
70aedd24 | 127 | { |
3876ec9e TG |
128 | if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock)) |
129 | desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data); | |
70aedd24 TG |
130 | } |
131 | ||
31d9d9b6 MZ |
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 | ||
f944b5a7 DL |
138 | #define for_each_action_of_desc(desc, act) \ |
139 | for (act = desc->act; act; act = act->next) | |
140 | ||
d5eb4ad2 | 141 | struct irq_desc * |
31d9d9b6 MZ |
142 | __irq_get_desc_lock(unsigned int irq, unsigned long *flags, bool bus, |
143 | unsigned int check); | |
d5eb4ad2 TG |
144 | void __irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags, bool bus); |
145 | ||
146 | static inline struct irq_desc * | |
31d9d9b6 | 147 | irq_get_desc_buslock(unsigned int irq, unsigned long *flags, unsigned int check) |
d5eb4ad2 | 148 | { |
31d9d9b6 | 149 | return __irq_get_desc_lock(irq, flags, true, check); |
d5eb4ad2 TG |
150 | } |
151 | ||
152 | static inline void | |
153 | irq_put_desc_busunlock(struct irq_desc *desc, unsigned long flags) | |
154 | { | |
155 | __irq_put_desc_unlock(desc, flags, true); | |
156 | } | |
157 | ||
158 | static inline struct irq_desc * | |
31d9d9b6 | 159 | irq_get_desc_lock(unsigned int irq, unsigned long *flags, unsigned int check) |
d5eb4ad2 | 160 | { |
31d9d9b6 | 161 | return __irq_get_desc_lock(irq, flags, false, check); |
d5eb4ad2 TG |
162 | } |
163 | ||
164 | static inline void | |
165 | irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags) | |
166 | { | |
167 | __irq_put_desc_unlock(desc, flags, false); | |
168 | } | |
169 | ||
b354286e BF |
170 | #define __irqd_to_state(d) ACCESS_PRIVATE((d)->common, state_use_accessors) |
171 | ||
f230b6d5 TG |
172 | /* |
173 | * Manipulation functions for irq_data.state | |
174 | */ | |
175 | static inline void irqd_set_move_pending(struct irq_data *d) | |
176 | { | |
0d0b4c86 | 177 | __irqd_to_state(d) |= IRQD_SETAFFINITY_PENDING; |
f230b6d5 TG |
178 | } |
179 | ||
180 | static inline void irqd_clr_move_pending(struct irq_data *d) | |
181 | { | |
0d0b4c86 | 182 | __irqd_to_state(d) &= ~IRQD_SETAFFINITY_PENDING; |
f230b6d5 | 183 | } |
a005677b TG |
184 | |
185 | static inline void irqd_clear(struct irq_data *d, unsigned int mask) | |
186 | { | |
0d0b4c86 | 187 | __irqd_to_state(d) &= ~mask; |
a005677b TG |
188 | } |
189 | ||
190 | static inline void irqd_set(struct irq_data *d, unsigned int mask) | |
191 | { | |
0d0b4c86 | 192 | __irqd_to_state(d) |= mask; |
a005677b TG |
193 | } |
194 | ||
2bdd1055 TG |
195 | static inline bool irqd_has_set(struct irq_data *d, unsigned int mask) |
196 | { | |
0d0b4c86 | 197 | return __irqd_to_state(d) & mask; |
2bdd1055 | 198 | } |
8f945a33 | 199 | |
b354286e BF |
200 | #undef __irqd_to_state |
201 | ||
b51bf95c | 202 | static inline void kstat_incr_irqs_this_cpu(struct irq_desc *desc) |
8f945a33 TG |
203 | { |
204 | __this_cpu_inc(*desc->kstat_irqs); | |
205 | __this_cpu_inc(kstat.irqs_sum); | |
206 | } | |
cab303be | 207 | |
6783011b JL |
208 | static inline int irq_desc_get_node(struct irq_desc *desc) |
209 | { | |
449e9cae | 210 | return irq_common_data_get_node(&desc->irq_common_data); |
6783011b JL |
211 | } |
212 | ||
4717f133 GS |
213 | static inline int irq_desc_is_chained(struct irq_desc *desc) |
214 | { | |
215 | return (desc->action && desc->action == &chained_action); | |
216 | } | |
217 | ||
cab303be | 218 | #ifdef CONFIG_PM_SLEEP |
9ce7a258 | 219 | bool irq_pm_check_wakeup(struct irq_desc *desc); |
cab303be TG |
220 | void irq_pm_install_action(struct irq_desc *desc, struct irqaction *action); |
221 | void irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action); | |
222 | #else | |
9ce7a258 | 223 | static inline bool irq_pm_check_wakeup(struct irq_desc *desc) { return false; } |
cab303be TG |
224 | static inline void |
225 | irq_pm_install_action(struct irq_desc *desc, struct irqaction *action) { } | |
226 | static inline void | |
227 | irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action) { } | |
228 | #endif |