Commit | Line | Data |
---|---|---|
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> |
1da177e4 | 10 | |
c1ee6264 TG |
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 | ||
dbec07ba TG |
17 | #define istate core_internal_state__do_not_mess_with_it |
18 | ||
2329abfa | 19 | extern bool noirqdebug; |
1da177e4 | 20 | |
1535dfac TG |
21 | /* |
22 | * Bits used by threaded handlers: | |
23 | * IRQTF_RUNTHREAD - signals that the interrupt handler thread should run | |
1535dfac TG |
24 | * IRQTF_WARNED - warning "IRQ_WAKE_THREAD w/o thread_fn" has been printed |
25 | * IRQTF_AFFINITY - irq thread is requested to adjust affinity | |
8d32a307 | 26 | * IRQTF_FORCED_THREAD - irq action is force threaded |
1535dfac TG |
27 | */ |
28 | enum { | |
29 | IRQTF_RUNTHREAD, | |
1535dfac TG |
30 | IRQTF_WARNED, |
31 | IRQTF_AFFINITY, | |
8d32a307 | 32 | IRQTF_FORCED_THREAD, |
1535dfac TG |
33 | }; |
34 | ||
bd062e76 | 35 | /* |
a257954b | 36 | * Bit masks for desc->core_internal_state__do_not_mess_with_it |
bd062e76 TG |
37 | * |
38 | * IRQS_AUTODETECT - autodetection in progress | |
7acdd53e TG |
39 | * IRQS_SPURIOUS_DISABLED - was disabled due to spurious interrupt |
40 | * detection | |
6954b75b | 41 | * IRQS_POLL_INPROGRESS - polling in progress |
3d67baec | 42 | * IRQS_ONESHOT - irq is not unmasked in primary handler |
163ef309 TG |
43 | * IRQS_REPLAY - irq is replayed |
44 | * IRQS_WAITING - irq is waiting | |
2a0d6fb3 | 45 | * IRQS_PENDING - irq is pending and replayed later |
c531e836 | 46 | * IRQS_SUSPENDED - irq is suspended |
bd062e76 TG |
47 | */ |
48 | enum { | |
49 | IRQS_AUTODETECT = 0x00000001, | |
7acdd53e | 50 | IRQS_SPURIOUS_DISABLED = 0x00000002, |
6954b75b | 51 | IRQS_POLL_INPROGRESS = 0x00000008, |
3d67baec | 52 | IRQS_ONESHOT = 0x00000020, |
163ef309 TG |
53 | IRQS_REPLAY = 0x00000040, |
54 | IRQS_WAITING = 0x00000080, | |
2a0d6fb3 | 55 | IRQS_PENDING = 0x00000200, |
c531e836 | 56 | IRQS_SUSPENDED = 0x00000800, |
bd062e76 TG |
57 | }; |
58 | ||
1ce6068d TG |
59 | #include "debug.h" |
60 | #include "settings.h" | |
61 | ||
a77c4635 TG |
62 | #define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data) |
63 | ||
0c5d1eb7 DB |
64 | extern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq, |
65 | unsigned long flags); | |
8df2e02c TG |
66 | extern void __disable_irq(struct irq_desc *desc, unsigned int irq); |
67 | extern void __enable_irq(struct irq_desc *desc, unsigned int irq); | |
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) { } | |
c291ee62 TG |
81 | extern void irq_lock_sparse(void); |
82 | extern void irq_unlock_sparse(void); | |
f63b6a05 TG |
83 | #else |
84 | extern void irq_mark_irq(unsigned int irq); | |
c291ee62 TG |
85 | static inline void irq_lock_sparse(void) { } |
86 | static inline void irq_unlock_sparse(void) { } | |
f63b6a05 TG |
87 | #endif |
88 | ||
85ac16d0 | 89 | extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr); |
0fa0ebbf | 90 | |
4912609f TG |
91 | irqreturn_t handle_irq_event_percpu(struct irq_desc *desc, struct irqaction *action); |
92 | irqreturn_t handle_irq_event(struct irq_desc *desc); | |
93 | ||
e144710b TG |
94 | /* Resending of interrupts :*/ |
95 | void check_irq_resend(struct irq_desc *desc, unsigned int irq); | |
fe200ae4 | 96 | bool irq_wait_for_poll(struct irq_desc *desc); |
a92444c6 | 97 | void __irq_wake_thread(struct irq_desc *desc, struct irqaction *action); |
e144710b | 98 | |
1da177e4 | 99 | #ifdef CONFIG_PROC_FS |
2c6927a3 | 100 | extern void register_irq_proc(unsigned int irq, struct irq_desc *desc); |
13bfe99e | 101 | extern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc); |
1da177e4 LT |
102 | extern void register_handler_proc(unsigned int irq, struct irqaction *action); |
103 | extern void unregister_handler_proc(unsigned int irq, struct irqaction *action); | |
104 | #else | |
2c6927a3 | 105 | static inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { } |
13bfe99e | 106 | static inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { } |
1da177e4 LT |
107 | static inline void register_handler_proc(unsigned int irq, |
108 | struct irqaction *action) { } | |
109 | static inline void unregister_handler_proc(unsigned int irq, | |
110 | struct irqaction *action) { } | |
111 | #endif | |
112 | ||
3b8249e7 | 113 | extern int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask); |
f6d87f4b | 114 | |
591d2fb0 | 115 | extern void irq_set_thread_affinity(struct irq_desc *desc); |
57b150cc | 116 | |
818b0f3b JL |
117 | extern int irq_do_set_affinity(struct irq_data *data, |
118 | const struct cpumask *dest, bool force); | |
119 | ||
70aedd24 | 120 | /* Inline functions for support of irq chips on slow busses */ |
3876ec9e | 121 | static inline void chip_bus_lock(struct irq_desc *desc) |
70aedd24 | 122 | { |
3876ec9e TG |
123 | if (unlikely(desc->irq_data.chip->irq_bus_lock)) |
124 | desc->irq_data.chip->irq_bus_lock(&desc->irq_data); | |
70aedd24 TG |
125 | } |
126 | ||
3876ec9e | 127 | static inline void chip_bus_sync_unlock(struct irq_desc *desc) |
70aedd24 | 128 | { |
3876ec9e TG |
129 | if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock)) |
130 | desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data); | |
70aedd24 TG |
131 | } |
132 | ||
31d9d9b6 MZ |
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 | ||
d5eb4ad2 | 139 | struct irq_desc * |
31d9d9b6 MZ |
140 | __irq_get_desc_lock(unsigned int irq, unsigned long *flags, bool bus, |
141 | unsigned int check); | |
d5eb4ad2 TG |
142 | void __irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags, bool bus); |
143 | ||
144 | static inline struct irq_desc * | |
31d9d9b6 | 145 | irq_get_desc_buslock(unsigned int irq, unsigned long *flags, unsigned int check) |
d5eb4ad2 | 146 | { |
31d9d9b6 | 147 | return __irq_get_desc_lock(irq, flags, true, check); |
d5eb4ad2 TG |
148 | } |
149 | ||
150 | static inline void | |
151 | irq_put_desc_busunlock(struct irq_desc *desc, unsigned long flags) | |
152 | { | |
153 | __irq_put_desc_unlock(desc, flags, true); | |
154 | } | |
155 | ||
156 | static inline struct irq_desc * | |
31d9d9b6 | 157 | irq_get_desc_lock(unsigned int irq, unsigned long *flags, unsigned int check) |
d5eb4ad2 | 158 | { |
31d9d9b6 | 159 | return __irq_get_desc_lock(irq, flags, false, check); |
d5eb4ad2 TG |
160 | } |
161 | ||
162 | static inline void | |
163 | irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags) | |
164 | { | |
165 | __irq_put_desc_unlock(desc, flags, false); | |
166 | } | |
167 | ||
f230b6d5 TG |
168 | /* |
169 | * Manipulation functions for irq_data.state | |
170 | */ | |
171 | static inline void irqd_set_move_pending(struct irq_data *d) | |
172 | { | |
173 | d->state_use_accessors |= IRQD_SETAFFINITY_PENDING; | |
f230b6d5 TG |
174 | } |
175 | ||
176 | static inline void irqd_clr_move_pending(struct irq_data *d) | |
177 | { | |
178 | d->state_use_accessors &= ~IRQD_SETAFFINITY_PENDING; | |
f230b6d5 | 179 | } |
a005677b TG |
180 | |
181 | static inline void irqd_clear(struct irq_data *d, unsigned int mask) | |
182 | { | |
183 | d->state_use_accessors &= ~mask; | |
184 | } | |
185 | ||
186 | static inline void irqd_set(struct irq_data *d, unsigned int mask) | |
187 | { | |
188 | d->state_use_accessors |= mask; | |
189 | } | |
190 | ||
2bdd1055 TG |
191 | static inline bool irqd_has_set(struct irq_data *d, unsigned int mask) |
192 | { | |
193 | return d->state_use_accessors & mask; | |
194 | } | |
8f945a33 TG |
195 | |
196 | static 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 | } | |
cab303be TG |
201 | |
202 | #ifdef CONFIG_PM_SLEEP | |
9ce7a258 | 203 | bool irq_pm_check_wakeup(struct irq_desc *desc); |
cab303be TG |
204 | void irq_pm_install_action(struct irq_desc *desc, struct irqaction *action); |
205 | void irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action); | |
206 | #else | |
9ce7a258 | 207 | static inline bool irq_pm_check_wakeup(struct irq_desc *desc) { return false; } |
cab303be TG |
208 | static inline void |
209 | irq_pm_install_action(struct irq_desc *desc, struct irqaction *action) { } | |
210 | static inline void | |
211 | irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action) { } | |
212 | #endif |