Branch data Line data Source code
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 : :
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 : :
16 : : #define istate core_internal_state__do_not_mess_with_it
17 : :
18 : : extern bool noirqdebug;
19 : :
20 : : /*
21 : : * Bits used by threaded handlers:
22 : : * IRQTF_RUNTHREAD - signals that the interrupt handler thread should run
23 : : * IRQTF_WARNED - warning "IRQ_WAKE_THREAD w/o thread_fn" has been printed
24 : : * IRQTF_AFFINITY - irq thread is requested to adjust affinity
25 : : * IRQTF_FORCED_THREAD - irq action is force threaded
26 : : */
27 : : enum {
28 : : IRQTF_RUNTHREAD,
29 : : IRQTF_WARNED,
30 : : IRQTF_AFFINITY,
31 : : IRQTF_FORCED_THREAD,
32 : : };
33 : :
34 : : /*
35 : : * Bit masks for desc->state
36 : : *
37 : : * IRQS_AUTODETECT - autodetection in progress
38 : : * IRQS_SPURIOUS_DISABLED - was disabled due to spurious interrupt
39 : : * detection
40 : : * IRQS_POLL_INPROGRESS - polling in progress
41 : : * IRQS_ONESHOT - irq is not unmasked in primary handler
42 : : * IRQS_REPLAY - irq is replayed
43 : : * IRQS_WAITING - irq is waiting
44 : : * IRQS_PENDING - irq is pending and replayed later
45 : : * IRQS_SUSPENDED - irq is suspended
46 : : */
47 : : enum {
48 : : IRQS_AUTODETECT = 0x00000001,
49 : : IRQS_SPURIOUS_DISABLED = 0x00000002,
50 : : IRQS_POLL_INPROGRESS = 0x00000008,
51 : : IRQS_ONESHOT = 0x00000020,
52 : : IRQS_REPLAY = 0x00000040,
53 : : IRQS_WAITING = 0x00000080,
54 : : IRQS_PENDING = 0x00000200,
55 : : IRQS_SUSPENDED = 0x00000800,
56 : : };
57 : :
58 : : #include "debug.h"
59 : : #include "settings.h"
60 : :
61 : : #define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data)
62 : :
63 : : extern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,
64 : : unsigned long flags);
65 : : extern void __disable_irq(struct irq_desc *desc, unsigned int irq, bool susp);
66 : : extern void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume);
67 : :
68 : : extern int irq_startup(struct irq_desc *desc, bool resend);
69 : : extern void irq_shutdown(struct irq_desc *desc);
70 : : extern void irq_enable(struct irq_desc *desc);
71 : : extern void irq_disable(struct irq_desc *desc);
72 : : extern void irq_percpu_enable(struct irq_desc *desc, unsigned int cpu);
73 : : extern void irq_percpu_disable(struct irq_desc *desc, unsigned int cpu);
74 : : extern void mask_irq(struct irq_desc *desc);
75 : : extern void unmask_irq(struct irq_desc *desc);
76 : :
77 : : extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr);
78 : :
79 : : irqreturn_t handle_irq_event_percpu(struct irq_desc *desc, struct irqaction *action);
80 : : irqreturn_t handle_irq_event(struct irq_desc *desc);
81 : :
82 : : /* Resending of interrupts :*/
83 : : void check_irq_resend(struct irq_desc *desc, unsigned int irq);
84 : : bool irq_wait_for_poll(struct irq_desc *desc);
85 : :
86 : : #ifdef CONFIG_PROC_FS
87 : : extern void register_irq_proc(unsigned int irq, struct irq_desc *desc);
88 : : extern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc);
89 : : extern void register_handler_proc(unsigned int irq, struct irqaction *action);
90 : : extern void unregister_handler_proc(unsigned int irq, struct irqaction *action);
91 : : #else
92 : : static inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { }
93 : : static inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { }
94 : : static inline void register_handler_proc(unsigned int irq,
95 : : struct irqaction *action) { }
96 : : static inline void unregister_handler_proc(unsigned int irq,
97 : : struct irqaction *action) { }
98 : : #endif
99 : :
100 : : extern int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask);
101 : :
102 : : extern void irq_set_thread_affinity(struct irq_desc *desc);
103 : :
104 : : extern int irq_do_set_affinity(struct irq_data *data,
105 : : const struct cpumask *dest, bool force);
106 : :
107 : : /* Inline functions for support of irq chips on slow busses */
108 : : static inline void chip_bus_lock(struct irq_desc *desc)
109 : : {
110 [ # # ][ # # ]: 0 : if (unlikely(desc->irq_data.chip->irq_bus_lock))
[ # # ][ # # ]
[ # # ][ # # ]
[ # # ]
111 : 0 : desc->irq_data.chip->irq_bus_lock(&desc->irq_data);
112 : : }
113 : :
114 : : static inline void chip_bus_sync_unlock(struct irq_desc *desc)
115 : : {
116 [ # # # # : 0 : if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock))
# # # # #
# # # # #
# # ][ # # ]
117 : 0 : desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data);
118 : : }
119 : :
120 : : #define _IRQ_DESC_CHECK (1 << 0)
121 : : #define _IRQ_DESC_PERCPU (1 << 1)
122 : :
123 : : #define IRQ_GET_DESC_CHECK_GLOBAL (_IRQ_DESC_CHECK)
124 : : #define IRQ_GET_DESC_CHECK_PERCPU (_IRQ_DESC_CHECK | _IRQ_DESC_PERCPU)
125 : :
126 : : struct irq_desc *
127 : : __irq_get_desc_lock(unsigned int irq, unsigned long *flags, bool bus,
128 : : unsigned int check);
129 : : void __irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags, bool bus);
130 : :
131 : : static inline struct irq_desc *
132 : : irq_get_desc_buslock(unsigned int irq, unsigned long *flags, unsigned int check)
133 : : {
134 : 0 : return __irq_get_desc_lock(irq, flags, true, check);
135 : : }
136 : :
137 : : static inline void
138 : : irq_put_desc_busunlock(struct irq_desc *desc, unsigned long flags)
139 : : {
140 : 0 : __irq_put_desc_unlock(desc, flags, true);
141 : : }
142 : :
143 : : static inline struct irq_desc *
144 : : irq_get_desc_lock(unsigned int irq, unsigned long *flags, unsigned int check)
145 : : {
146 : 0 : return __irq_get_desc_lock(irq, flags, false, check);
147 : : }
148 : :
149 : : static inline void
150 : : irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags)
151 : : {
152 : 0 : __irq_put_desc_unlock(desc, flags, false);
153 : : }
154 : :
155 : : /*
156 : : * Manipulation functions for irq_data.state
157 : : */
158 : : static inline void irqd_set_move_pending(struct irq_data *d)
159 : : {
160 : : d->state_use_accessors |= IRQD_SETAFFINITY_PENDING;
161 : : }
162 : :
163 : : static inline void irqd_clr_move_pending(struct irq_data *d)
164 : : {
165 : : d->state_use_accessors &= ~IRQD_SETAFFINITY_PENDING;
166 : : }
167 : :
168 : : static inline void irqd_clear(struct irq_data *d, unsigned int mask)
169 : : {
170 : 3091276 : d->state_use_accessors &= ~mask;
171 : : }
172 : :
173 : : static inline void irqd_set(struct irq_data *d, unsigned int mask)
174 : : {
175 : 3091268 : d->state_use_accessors |= mask;
176 : : }
177 : :
178 : : static inline bool irqd_has_set(struct irq_data *d, unsigned int mask)
179 : : {
180 : 0 : return d->state_use_accessors & mask;
181 : : }
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