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> |
1da177e4 | 9 | |
c1ee6264 TG |
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 | ||
dbec07ba TG |
16 | #define istate core_internal_state__do_not_mess_with_it |
17 | ||
a6967caf TG |
18 | #ifdef CONFIG_GENERIC_HARDIRQS_NO_COMPAT |
19 | # define status status_use_accessors | |
20 | #endif | |
21 | ||
1da177e4 LT |
22 | extern int noirqdebug; |
23 | ||
1535dfac TG |
24 | /* |
25 | * Bits used by threaded handlers: | |
26 | * IRQTF_RUNTHREAD - signals that the interrupt handler thread should run | |
27 | * IRQTF_DIED - handler thread died | |
28 | * IRQTF_WARNED - warning "IRQ_WAKE_THREAD w/o thread_fn" has been printed | |
29 | * IRQTF_AFFINITY - irq thread is requested to adjust affinity | |
8d32a307 | 30 | * IRQTF_FORCED_THREAD - irq action is force threaded |
1535dfac TG |
31 | */ |
32 | enum { | |
33 | IRQTF_RUNTHREAD, | |
34 | IRQTF_DIED, | |
35 | IRQTF_WARNED, | |
36 | IRQTF_AFFINITY, | |
8d32a307 | 37 | IRQTF_FORCED_THREAD, |
1535dfac TG |
38 | }; |
39 | ||
bd062e76 TG |
40 | /* |
41 | * Bit masks for desc->state | |
42 | * | |
43 | * IRQS_AUTODETECT - autodetection in progress | |
7acdd53e TG |
44 | * IRQS_SPURIOUS_DISABLED - was disabled due to spurious interrupt |
45 | * detection | |
6954b75b | 46 | * IRQS_POLL_INPROGRESS - polling in progress |
009b4c3b | 47 | * IRQS_INPROGRESS - Interrupt in progress |
3d67baec | 48 | * IRQS_ONESHOT - irq is not unmasked in primary handler |
163ef309 TG |
49 | * IRQS_REPLAY - irq is replayed |
50 | * IRQS_WAITING - irq is waiting | |
c1594b77 | 51 | * IRQS_DISABLED - irq is disabled |
2a0d6fb3 | 52 | * IRQS_PENDING - irq is pending and replayed later |
6e40262e | 53 | * IRQS_MASKED - irq is masked |
c531e836 | 54 | * IRQS_SUSPENDED - irq is suspended |
bd062e76 TG |
55 | */ |
56 | enum { | |
57 | IRQS_AUTODETECT = 0x00000001, | |
7acdd53e | 58 | IRQS_SPURIOUS_DISABLED = 0x00000002, |
6954b75b | 59 | IRQS_POLL_INPROGRESS = 0x00000008, |
009b4c3b | 60 | IRQS_INPROGRESS = 0x00000010, |
3d67baec | 61 | IRQS_ONESHOT = 0x00000020, |
163ef309 TG |
62 | IRQS_REPLAY = 0x00000040, |
63 | IRQS_WAITING = 0x00000080, | |
c1594b77 | 64 | IRQS_DISABLED = 0x00000100, |
2a0d6fb3 | 65 | IRQS_PENDING = 0x00000200, |
6e40262e | 66 | IRQS_MASKED = 0x00000400, |
c531e836 | 67 | IRQS_SUSPENDED = 0x00000800, |
bd062e76 TG |
68 | }; |
69 | ||
1ce6068d TG |
70 | #include "compat.h" |
71 | #include "debug.h" | |
72 | #include "settings.h" | |
73 | ||
a77c4635 TG |
74 | #define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data) |
75 | ||
6a6de9ef TG |
76 | /* Set default functions for irq_chip structures: */ |
77 | extern void irq_chip_set_defaults(struct irq_chip *chip); | |
78 | ||
0c5d1eb7 DB |
79 | extern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq, |
80 | unsigned long flags); | |
0a0c5168 RW |
81 | extern void __disable_irq(struct irq_desc *desc, unsigned int irq, bool susp); |
82 | extern void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume); | |
0c5d1eb7 | 83 | |
46999238 TG |
84 | extern int irq_startup(struct irq_desc *desc); |
85 | extern void irq_shutdown(struct irq_desc *desc); | |
87923470 TG |
86 | extern void irq_enable(struct irq_desc *desc); |
87 | extern void irq_disable(struct irq_desc *desc); | |
d4d5e089 TG |
88 | extern void mask_irq(struct irq_desc *desc); |
89 | extern void unmask_irq(struct irq_desc *desc); | |
46999238 | 90 | |
85ac16d0 | 91 | extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr); |
0fa0ebbf | 92 | |
4912609f TG |
93 | irqreturn_t handle_irq_event_percpu(struct irq_desc *desc, struct irqaction *action); |
94 | irqreturn_t handle_irq_event(struct irq_desc *desc); | |
95 | ||
e144710b TG |
96 | /* Resending of interrupts :*/ |
97 | void check_irq_resend(struct irq_desc *desc, unsigned int irq); | |
fe200ae4 | 98 | bool irq_wait_for_poll(struct irq_desc *desc); |
e144710b | 99 | |
1da177e4 | 100 | #ifdef CONFIG_PROC_FS |
2c6927a3 | 101 | extern void register_irq_proc(unsigned int irq, struct irq_desc *desc); |
13bfe99e | 102 | extern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc); |
1da177e4 LT |
103 | extern void register_handler_proc(unsigned int irq, struct irqaction *action); |
104 | extern void unregister_handler_proc(unsigned int irq, struct irqaction *action); | |
105 | #else | |
2c6927a3 | 106 | static inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { } |
13bfe99e | 107 | static inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { } |
1da177e4 LT |
108 | static inline void register_handler_proc(unsigned int irq, |
109 | struct irqaction *action) { } | |
110 | static inline void unregister_handler_proc(unsigned int irq, | |
111 | struct irqaction *action) { } | |
112 | #endif | |
113 | ||
3b8249e7 | 114 | extern int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask); |
f6d87f4b | 115 | |
591d2fb0 | 116 | extern void irq_set_thread_affinity(struct irq_desc *desc); |
57b150cc | 117 | |
70aedd24 | 118 | /* Inline functions for support of irq chips on slow busses */ |
3876ec9e | 119 | static inline void chip_bus_lock(struct irq_desc *desc) |
70aedd24 | 120 | { |
3876ec9e TG |
121 | if (unlikely(desc->irq_data.chip->irq_bus_lock)) |
122 | desc->irq_data.chip->irq_bus_lock(&desc->irq_data); | |
70aedd24 TG |
123 | } |
124 | ||
3876ec9e | 125 | static inline void chip_bus_sync_unlock(struct irq_desc *desc) |
70aedd24 | 126 | { |
3876ec9e TG |
127 | if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock)) |
128 | desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data); | |
70aedd24 TG |
129 | } |
130 | ||
d5eb4ad2 TG |
131 | struct irq_desc * |
132 | __irq_get_desc_lock(unsigned int irq, unsigned long *flags, bool bus); | |
133 | void __irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags, bool bus); | |
134 | ||
135 | static inline struct irq_desc * | |
136 | irq_get_desc_buslock(unsigned int irq, unsigned long *flags) | |
137 | { | |
138 | return __irq_get_desc_lock(irq, flags, true); | |
139 | } | |
140 | ||
141 | static inline void | |
142 | irq_put_desc_busunlock(struct irq_desc *desc, unsigned long flags) | |
143 | { | |
144 | __irq_put_desc_unlock(desc, flags, true); | |
145 | } | |
146 | ||
147 | static inline struct irq_desc * | |
148 | irq_get_desc_lock(unsigned int irq, unsigned long *flags) | |
149 | { | |
150 | return __irq_get_desc_lock(irq, flags, false); | |
151 | } | |
152 | ||
153 | static inline void | |
154 | irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags) | |
155 | { | |
156 | __irq_put_desc_unlock(desc, flags, false); | |
157 | } | |
158 | ||
f230b6d5 TG |
159 | /* |
160 | * Manipulation functions for irq_data.state | |
161 | */ | |
162 | static inline void irqd_set_move_pending(struct irq_data *d) | |
163 | { | |
164 | d->state_use_accessors |= IRQD_SETAFFINITY_PENDING; | |
165 | irq_compat_set_move_pending(irq_data_to_desc(d)); | |
166 | } | |
167 | ||
168 | static inline void irqd_clr_move_pending(struct irq_data *d) | |
169 | { | |
170 | d->state_use_accessors &= ~IRQD_SETAFFINITY_PENDING; | |
171 | irq_compat_clr_move_pending(irq_data_to_desc(d)); | |
172 | } | |
a005677b TG |
173 | |
174 | static inline void irqd_clear(struct irq_data *d, unsigned int mask) | |
175 | { | |
176 | d->state_use_accessors &= ~mask; | |
177 | } | |
178 | ||
179 | static inline void irqd_set(struct irq_data *d, unsigned int mask) | |
180 | { | |
181 | d->state_use_accessors |= mask; | |
182 | } | |
183 | ||
2bdd1055 TG |
184 | static inline bool irqd_has_set(struct irq_data *d, unsigned int mask) |
185 | { | |
186 | return d->state_use_accessors & mask; | |
187 | } |