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e144710b TG |
1 | #ifndef _LINUX_IRQDESC_H |
2 | #define _LINUX_IRQDESC_H | |
3 | ||
4 | /* | |
5 | * Core internal functions to deal with irq descriptors | |
6 | * | |
7 | * This include will move to kernel/irq once we cleaned up the tree. | |
8 | * For now it's included from <linux/irq.h> | |
9 | */ | |
10 | ||
cd7eab44 | 11 | struct irq_affinity_notify; |
e144710b TG |
12 | struct proc_dir_entry; |
13 | struct timer_rand_state; | |
e144710b TG |
14 | /** |
15 | * struct irq_desc - interrupt descriptor | |
16 | * @irq_data: per irq and chip data passed down to chip functions | |
17 | * @timer_rand_state: pointer to timer rand state struct | |
18 | * @kstat_irqs: irq stats per cpu | |
19 | * @handle_irq: highlevel irq-events handler [if NULL, __do_IRQ()] | |
20 | * @action: the irq action chain | |
21 | * @status: status information | |
dbec07ba | 22 | * @core_internal_state__do_not_mess_with_it: core internal status information |
e144710b TG |
23 | * @depth: disable-depth, for nested irq_disable() calls |
24 | * @wake_depth: enable depth, for multiple set_irq_wake() callers | |
25 | * @irq_count: stats field to detect stalled irqs | |
26 | * @last_unhandled: aging timer for unhandled count | |
27 | * @irqs_unhandled: stats field for spurious unhandled interrupts | |
28 | * @lock: locking for SMP | |
cd7eab44 | 29 | * @affinity_notify: context for notification of affinity changes |
e144710b TG |
30 | * @pending_mask: pending rebalanced interrupts |
31 | * @threads_active: number of irqaction threads currently running | |
32 | * @wait_for_threads: wait queue for sync_irq to wait for threaded handlers | |
33 | * @dir: /proc/irq/ procfs entry | |
34 | * @name: flow handler name for /proc/interrupts output | |
35 | */ | |
36 | struct irq_desc { | |
37 | ||
38 | #ifdef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED | |
39 | struct irq_data irq_data; | |
40 | #else | |
41 | /* | |
42 | * This union will go away, once we fixed the direct access to | |
43 | * irq_desc all over the place. The direct fields are a 1:1 | |
44 | * overlay of irq_data. | |
45 | */ | |
46 | union { | |
47 | struct irq_data irq_data; | |
48 | struct { | |
49 | unsigned int irq; | |
50 | unsigned int node; | |
91c49917 | 51 | unsigned int pad_do_not_even_think_about_it; |
e144710b TG |
52 | struct irq_chip *chip; |
53 | void *handler_data; | |
54 | void *chip_data; | |
55 | struct msi_desc *msi_desc; | |
56 | #ifdef CONFIG_SMP | |
57 | cpumask_var_t affinity; | |
e144710b TG |
58 | #endif |
59 | }; | |
60 | }; | |
61 | #endif | |
62 | ||
63 | struct timer_rand_state *timer_rand_state; | |
6c9ae009 | 64 | unsigned int __percpu *kstat_irqs; |
e144710b TG |
65 | irq_flow_handler_t handle_irq; |
66 | struct irqaction *action; /* IRQ action list */ | |
67 | unsigned int status; /* IRQ status */ | |
dbec07ba | 68 | unsigned int core_internal_state__do_not_mess_with_it; |
e144710b TG |
69 | unsigned int depth; /* nested irq disables */ |
70 | unsigned int wake_depth; /* nested wake enables */ | |
71 | unsigned int irq_count; /* For detecting broken IRQs */ | |
72 | unsigned long last_unhandled; /* Aging timer for unhandled count */ | |
73 | unsigned int irqs_unhandled; | |
74 | raw_spinlock_t lock; | |
75 | #ifdef CONFIG_SMP | |
76 | const struct cpumask *affinity_hint; | |
cd7eab44 | 77 | struct irq_affinity_notify *affinity_notify; |
e144710b TG |
78 | #ifdef CONFIG_GENERIC_PENDING_IRQ |
79 | cpumask_var_t pending_mask; | |
80 | #endif | |
81 | #endif | |
82 | atomic_t threads_active; | |
83 | wait_queue_head_t wait_for_threads; | |
84 | #ifdef CONFIG_PROC_FS | |
85 | struct proc_dir_entry *dir; | |
86 | #endif | |
87 | const char *name; | |
88 | } ____cacheline_internodealigned_in_smp; | |
89 | ||
e144710b TG |
90 | #ifndef CONFIG_SPARSE_IRQ |
91 | extern struct irq_desc irq_desc[NR_IRQS]; | |
92 | #endif | |
93 | ||
78f90d91 TG |
94 | /* Will be removed once the last users in power and sh are gone */ |
95 | extern struct irq_desc *irq_to_desc_alloc_node(unsigned int irq, int node); | |
e144710b TG |
96 | static inline struct irq_desc *move_irq_desc(struct irq_desc *desc, int node) |
97 | { | |
98 | return desc; | |
99 | } | |
e144710b TG |
100 | |
101 | #ifdef CONFIG_GENERIC_HARDIRQS | |
102 | ||
a0cd9ca2 TG |
103 | static inline struct irq_chip *irq_desc_get_chip(struct irq_desc *desc) |
104 | { | |
105 | return desc->irq_data.chip; | |
106 | } | |
107 | ||
108 | static inline void *irq_desc_get_chip_data(struct irq_desc *desc) | |
109 | { | |
110 | return desc->irq_data.chip_data; | |
111 | } | |
112 | ||
113 | static inline void *irq_desc_get_handler_data(struct irq_desc *desc) | |
114 | { | |
115 | return desc->irq_data.handler_data; | |
116 | } | |
117 | ||
118 | static inline struct msi_desc *irq_desc_get_msi_desc(struct irq_desc *desc) | |
119 | { | |
120 | return desc->irq_data.msi_desc; | |
121 | } | |
122 | ||
123 | #ifndef CONFIG_GENERIC_HARDIRQS_NO_COMPAT | |
124 | static inline struct irq_chip *get_irq_desc_chip(struct irq_desc *desc) | |
125 | { | |
126 | return irq_desc_get_chip(desc); | |
127 | } | |
128 | static inline void *get_irq_desc_data(struct irq_desc *desc) | |
129 | { | |
130 | return irq_desc_get_handler_data(desc); | |
131 | } | |
132 | ||
133 | static inline void *get_irq_desc_chip_data(struct irq_desc *desc) | |
134 | { | |
135 | return irq_desc_get_chip_data(desc); | |
136 | } | |
137 | ||
138 | static inline struct msi_desc *get_irq_desc_msi(struct irq_desc *desc) | |
139 | { | |
140 | return irq_desc_get_msi_desc(desc); | |
141 | } | |
142 | #endif | |
e144710b | 143 | |
e144710b TG |
144 | /* |
145 | * Architectures call this to let the generic IRQ layer | |
146 | * handle an interrupt. If the descriptor is attached to an | |
147 | * irqchip-style controller then we call the ->handle_irq() handler, | |
148 | * and it calls __do_IRQ() if it's attached to an irqtype-style controller. | |
149 | */ | |
150 | static inline void generic_handle_irq_desc(unsigned int irq, struct irq_desc *desc) | |
151 | { | |
e144710b | 152 | desc->handle_irq(irq, desc); |
e144710b TG |
153 | } |
154 | ||
155 | static inline void generic_handle_irq(unsigned int irq) | |
156 | { | |
157 | generic_handle_irq_desc(irq, irq_to_desc(irq)); | |
158 | } | |
159 | ||
160 | /* Test to see if a driver has successfully requested an irq */ | |
161 | static inline int irq_has_action(unsigned int irq) | |
162 | { | |
163 | struct irq_desc *desc = irq_to_desc(irq); | |
164 | return desc->action != NULL; | |
165 | } | |
166 | ||
167 | static inline int irq_balancing_disabled(unsigned int irq) | |
168 | { | |
169 | struct irq_desc *desc; | |
170 | ||
171 | desc = irq_to_desc(irq); | |
172 | return desc->status & IRQ_NO_BALANCING_MASK; | |
173 | } | |
174 | ||
175 | /* caller has locked the irq_desc and both params are valid */ | |
176 | static inline void __set_irq_handler_unlocked(int irq, | |
177 | irq_flow_handler_t handler) | |
178 | { | |
179 | struct irq_desc *desc; | |
180 | ||
181 | desc = irq_to_desc(irq); | |
182 | desc->handle_irq = handler; | |
183 | } | |
184 | #endif | |
185 | ||
186 | #endif |