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> |
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 | |
4cde9c6b TG |
69 | #define IRQ_RESEND true |
70 | #define IRQ_NORESEND false | |
71 | ||
72 | #define IRQ_START_FORCE true | |
73 | #define IRQ_START_COND false | |
74 | ||
75 | extern int irq_startup(struct irq_desc *desc, bool resend, bool force); | |
76 | ||
46999238 | 77 | extern void irq_shutdown(struct irq_desc *desc); |
87923470 TG |
78 | extern void irq_enable(struct irq_desc *desc); |
79 | extern void irq_disable(struct irq_desc *desc); | |
31d9d9b6 MZ |
80 | extern void irq_percpu_enable(struct irq_desc *desc, unsigned int cpu); |
81 | extern void irq_percpu_disable(struct irq_desc *desc, unsigned int cpu); | |
d4d5e089 TG |
82 | extern void mask_irq(struct irq_desc *desc); |
83 | extern void unmask_irq(struct irq_desc *desc); | |
328a4978 | 84 | extern void unmask_threaded_irq(struct irq_desc *desc); |
46999238 | 85 | |
f63b6a05 TG |
86 | #ifdef CONFIG_SPARSE_IRQ |
87 | static inline void irq_mark_irq(unsigned int irq) { } | |
88 | #else | |
89 | extern void irq_mark_irq(unsigned int irq); | |
90 | #endif | |
91 | ||
85ac16d0 | 92 | extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr); |
0fa0ebbf | 93 | |
edd14cfe | 94 | irqreturn_t __handle_irq_event_percpu(struct irq_desc *desc, unsigned int *flags); |
71f64340 | 95 | irqreturn_t handle_irq_event_percpu(struct irq_desc *desc); |
4912609f TG |
96 | irqreturn_t handle_irq_event(struct irq_desc *desc); |
97 | ||
e144710b | 98 | /* Resending of interrupts :*/ |
0798abeb | 99 | void check_irq_resend(struct irq_desc *desc); |
fe200ae4 | 100 | bool irq_wait_for_poll(struct irq_desc *desc); |
a92444c6 | 101 | void __irq_wake_thread(struct irq_desc *desc, struct irqaction *action); |
e144710b | 102 | |
1da177e4 | 103 | #ifdef CONFIG_PROC_FS |
2c6927a3 | 104 | extern void register_irq_proc(unsigned int irq, struct irq_desc *desc); |
13bfe99e | 105 | extern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc); |
1da177e4 LT |
106 | extern void register_handler_proc(unsigned int irq, struct irqaction *action); |
107 | extern void unregister_handler_proc(unsigned int irq, struct irqaction *action); | |
108 | #else | |
2c6927a3 | 109 | static inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { } |
13bfe99e | 110 | static inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { } |
1da177e4 LT |
111 | static inline void register_handler_proc(unsigned int irq, |
112 | struct irqaction *action) { } | |
113 | static inline void unregister_handler_proc(unsigned int irq, | |
114 | struct irqaction *action) { } | |
115 | #endif | |
116 | ||
9c255583 TG |
117 | extern bool irq_can_set_affinity_usr(unsigned int irq); |
118 | ||
cba4235e | 119 | extern int irq_select_affinity_usr(unsigned int irq); |
f6d87f4b | 120 | |
591d2fb0 | 121 | extern void irq_set_thread_affinity(struct irq_desc *desc); |
57b150cc | 122 | |
818b0f3b JL |
123 | extern int irq_do_set_affinity(struct irq_data *data, |
124 | const struct cpumask *dest, bool force); | |
125 | ||
43564bd9 TG |
126 | #ifdef CONFIG_SMP |
127 | extern int irq_setup_affinity(struct irq_desc *desc); | |
128 | #else | |
129 | static inline int irq_setup_affinity(struct irq_desc *desc) { return 0; } | |
130 | #endif | |
131 | ||
70aedd24 | 132 | /* Inline functions for support of irq chips on slow busses */ |
3876ec9e | 133 | static inline void chip_bus_lock(struct irq_desc *desc) |
70aedd24 | 134 | { |
3876ec9e TG |
135 | if (unlikely(desc->irq_data.chip->irq_bus_lock)) |
136 | desc->irq_data.chip->irq_bus_lock(&desc->irq_data); | |
70aedd24 TG |
137 | } |
138 | ||
3876ec9e | 139 | static inline void chip_bus_sync_unlock(struct irq_desc *desc) |
70aedd24 | 140 | { |
3876ec9e TG |
141 | if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock)) |
142 | desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data); | |
70aedd24 TG |
143 | } |
144 | ||
31d9d9b6 MZ |
145 | #define _IRQ_DESC_CHECK (1 << 0) |
146 | #define _IRQ_DESC_PERCPU (1 << 1) | |
147 | ||
148 | #define IRQ_GET_DESC_CHECK_GLOBAL (_IRQ_DESC_CHECK) | |
149 | #define IRQ_GET_DESC_CHECK_PERCPU (_IRQ_DESC_CHECK | _IRQ_DESC_PERCPU) | |
150 | ||
f944b5a7 DL |
151 | #define for_each_action_of_desc(desc, act) \ |
152 | for (act = desc->act; act; act = act->next) | |
153 | ||
d5eb4ad2 | 154 | struct irq_desc * |
31d9d9b6 MZ |
155 | __irq_get_desc_lock(unsigned int irq, unsigned long *flags, bool bus, |
156 | unsigned int check); | |
d5eb4ad2 TG |
157 | void __irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags, bool bus); |
158 | ||
159 | static inline struct irq_desc * | |
31d9d9b6 | 160 | irq_get_desc_buslock(unsigned int irq, unsigned long *flags, unsigned int check) |
d5eb4ad2 | 161 | { |
31d9d9b6 | 162 | return __irq_get_desc_lock(irq, flags, true, check); |
d5eb4ad2 TG |
163 | } |
164 | ||
165 | static inline void | |
166 | irq_put_desc_busunlock(struct irq_desc *desc, unsigned long flags) | |
167 | { | |
168 | __irq_put_desc_unlock(desc, flags, true); | |
169 | } | |
170 | ||
171 | static inline struct irq_desc * | |
31d9d9b6 | 172 | irq_get_desc_lock(unsigned int irq, unsigned long *flags, unsigned int check) |
d5eb4ad2 | 173 | { |
31d9d9b6 | 174 | return __irq_get_desc_lock(irq, flags, false, check); |
d5eb4ad2 TG |
175 | } |
176 | ||
177 | static inline void | |
178 | irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags) | |
179 | { | |
180 | __irq_put_desc_unlock(desc, flags, false); | |
181 | } | |
182 | ||
b354286e BF |
183 | #define __irqd_to_state(d) ACCESS_PRIVATE((d)->common, state_use_accessors) |
184 | ||
087cdfb6 TG |
185 | static inline unsigned int irqd_get(struct irq_data *d) |
186 | { | |
187 | return __irqd_to_state(d); | |
188 | } | |
189 | ||
f230b6d5 TG |
190 | /* |
191 | * Manipulation functions for irq_data.state | |
192 | */ | |
193 | static inline void irqd_set_move_pending(struct irq_data *d) | |
194 | { | |
0d0b4c86 | 195 | __irqd_to_state(d) |= IRQD_SETAFFINITY_PENDING; |
f230b6d5 TG |
196 | } |
197 | ||
198 | static inline void irqd_clr_move_pending(struct irq_data *d) | |
199 | { | |
0d0b4c86 | 200 | __irqd_to_state(d) &= ~IRQD_SETAFFINITY_PENDING; |
f230b6d5 | 201 | } |
a005677b | 202 | |
54fdf6a0 TG |
203 | static inline void irqd_set_managed_shutdown(struct irq_data *d) |
204 | { | |
205 | __irqd_to_state(d) |= IRQD_MANAGED_SHUTDOWN; | |
206 | } | |
207 | ||
208 | static inline void irqd_clr_managed_shutdown(struct irq_data *d) | |
209 | { | |
210 | __irqd_to_state(d) &= ~IRQD_MANAGED_SHUTDOWN; | |
211 | } | |
212 | ||
a005677b TG |
213 | static inline void irqd_clear(struct irq_data *d, unsigned int mask) |
214 | { | |
0d0b4c86 | 215 | __irqd_to_state(d) &= ~mask; |
a005677b TG |
216 | } |
217 | ||
218 | static inline void irqd_set(struct irq_data *d, unsigned int mask) | |
219 | { | |
0d0b4c86 | 220 | __irqd_to_state(d) |= mask; |
a005677b TG |
221 | } |
222 | ||
2bdd1055 TG |
223 | static inline bool irqd_has_set(struct irq_data *d, unsigned int mask) |
224 | { | |
0d0b4c86 | 225 | return __irqd_to_state(d) & mask; |
2bdd1055 | 226 | } |
8f945a33 | 227 | |
b354286e BF |
228 | #undef __irqd_to_state |
229 | ||
b51bf95c | 230 | static inline void kstat_incr_irqs_this_cpu(struct irq_desc *desc) |
8f945a33 TG |
231 | { |
232 | __this_cpu_inc(*desc->kstat_irqs); | |
233 | __this_cpu_inc(kstat.irqs_sum); | |
234 | } | |
cab303be | 235 | |
6783011b JL |
236 | static inline int irq_desc_get_node(struct irq_desc *desc) |
237 | { | |
449e9cae | 238 | return irq_common_data_get_node(&desc->irq_common_data); |
6783011b JL |
239 | } |
240 | ||
4717f133 GS |
241 | static inline int irq_desc_is_chained(struct irq_desc *desc) |
242 | { | |
243 | return (desc->action && desc->action == &chained_action); | |
244 | } | |
245 | ||
cab303be | 246 | #ifdef CONFIG_PM_SLEEP |
9ce7a258 | 247 | bool irq_pm_check_wakeup(struct irq_desc *desc); |
cab303be TG |
248 | void irq_pm_install_action(struct irq_desc *desc, struct irqaction *action); |
249 | void irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action); | |
250 | #else | |
9ce7a258 | 251 | static inline bool irq_pm_check_wakeup(struct irq_desc *desc) { return false; } |
cab303be TG |
252 | static inline void |
253 | irq_pm_install_action(struct irq_desc *desc, struct irqaction *action) { } | |
254 | static inline void | |
255 | irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action) { } | |
256 | #endif | |
f1602039 BG |
257 | |
258 | #ifdef CONFIG_GENERIC_IRQ_CHIP | |
259 | void irq_init_generic_chip(struct irq_chip_generic *gc, const char *name, | |
260 | int num_ct, unsigned int irq_base, | |
261 | void __iomem *reg_base, irq_flow_handler_t handler); | |
262 | #else | |
263 | static inline void | |
264 | irq_init_generic_chip(struct irq_chip_generic *gc, const char *name, | |
265 | int num_ct, unsigned int irq_base, | |
266 | void __iomem *reg_base, irq_flow_handler_t handler) { } | |
267 | #endif /* CONFIG_GENERIC_IRQ_CHIP */ | |
087cdfb6 | 268 | |
137221df CH |
269 | #ifdef CONFIG_GENERIC_PENDING_IRQ |
270 | static inline bool irq_can_move_pcntxt(struct irq_data *data) | |
271 | { | |
272 | return irqd_can_move_in_process_context(data); | |
273 | } | |
274 | static inline bool irq_move_pending(struct irq_data *data) | |
275 | { | |
276 | return irqd_is_setaffinity_pending(data); | |
277 | } | |
278 | static inline void | |
279 | irq_copy_pending(struct irq_desc *desc, const struct cpumask *mask) | |
280 | { | |
281 | cpumask_copy(desc->pending_mask, mask); | |
282 | } | |
283 | static inline void | |
284 | irq_get_pending(struct cpumask *mask, struct irq_desc *desc) | |
285 | { | |
286 | cpumask_copy(mask, desc->pending_mask); | |
287 | } | |
f0383c24 TG |
288 | static inline struct cpumask *irq_desc_get_pending_mask(struct irq_desc *desc) |
289 | { | |
290 | return desc->pending_mask; | |
291 | } | |
36d84fb4 | 292 | bool irq_fixup_move_pending(struct irq_desc *desc, bool force_clear); |
137221df CH |
293 | #else /* CONFIG_GENERIC_PENDING_IRQ */ |
294 | static inline bool irq_can_move_pcntxt(struct irq_data *data) | |
295 | { | |
296 | return true; | |
297 | } | |
298 | static inline bool irq_move_pending(struct irq_data *data) | |
299 | { | |
300 | return false; | |
301 | } | |
302 | static inline void | |
303 | irq_copy_pending(struct irq_desc *desc, const struct cpumask *mask) | |
304 | { | |
305 | } | |
306 | static inline void | |
307 | irq_get_pending(struct cpumask *mask, struct irq_desc *desc) | |
308 | { | |
309 | } | |
f0383c24 TG |
310 | static inline struct cpumask *irq_desc_get_pending_mask(struct irq_desc *desc) |
311 | { | |
312 | return NULL; | |
313 | } | |
36d84fb4 TG |
314 | static inline bool irq_fixup_move_pending(struct irq_desc *desc, bool fclear) |
315 | { | |
316 | return false; | |
317 | } | |
f0383c24 | 318 | #endif /* !CONFIG_GENERIC_PENDING_IRQ */ |
137221df | 319 | |
087cdfb6 TG |
320 | #ifdef CONFIG_GENERIC_IRQ_DEBUGFS |
321 | void irq_add_debugfs_entry(unsigned int irq, struct irq_desc *desc); | |
322 | void irq_remove_debugfs_entry(struct irq_desc *desc); | |
323 | # ifdef CONFIG_IRQ_DOMAIN | |
324 | void irq_domain_debugfs_init(struct dentry *root); | |
325 | # else | |
326 | static inline void irq_domain_debugfs_init(struct dentry *root); | |
327 | # endif | |
328 | #else /* CONFIG_GENERIC_IRQ_DEBUGFS */ | |
329 | static inline void irq_add_debugfs_entry(unsigned int irq, struct irq_desc *d) | |
330 | { | |
331 | } | |
332 | static inline void irq_remove_debugfs_entry(struct irq_desc *d) | |
333 | { | |
334 | } | |
335 | #endif /* CONFIG_GENERIC_IRQ_DEBUGFS */ |