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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 | 30 | * @pending_mask: pending rebalanced interrupts |
b5faba21 | 31 | * @threads_oneshot: bitfield to handle shared oneshot threads |
e144710b TG |
32 | * @threads_active: number of irqaction threads currently running |
33 | * @wait_for_threads: wait queue for sync_irq to wait for threaded handlers | |
34 | * @dir: /proc/irq/ procfs entry | |
35 | * @name: flow handler name for /proc/interrupts output | |
36 | */ | |
37 | struct irq_desc { | |
38 | ||
39 | #ifdef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED | |
40 | struct irq_data irq_data; | |
41 | #else | |
42 | /* | |
43 | * This union will go away, once we fixed the direct access to | |
44 | * irq_desc all over the place. The direct fields are a 1:1 | |
45 | * overlay of irq_data. | |
46 | */ | |
47 | union { | |
48 | struct irq_data irq_data; | |
49 | struct { | |
50 | unsigned int irq; | |
51 | unsigned int node; | |
91c49917 | 52 | unsigned int pad_do_not_even_think_about_it; |
e144710b TG |
53 | struct irq_chip *chip; |
54 | void *handler_data; | |
55 | void *chip_data; | |
56 | struct msi_desc *msi_desc; | |
57 | #ifdef CONFIG_SMP | |
58 | cpumask_var_t affinity; | |
e144710b TG |
59 | #endif |
60 | }; | |
61 | }; | |
62 | #endif | |
63 | ||
64 | struct timer_rand_state *timer_rand_state; | |
6c9ae009 | 65 | unsigned int __percpu *kstat_irqs; |
e144710b | 66 | irq_flow_handler_t handle_irq; |
78129576 TG |
67 | #ifdef CONFIG_IRQ_PREFLOW_FASTEOI |
68 | irq_preflow_handler_t preflow_handler; | |
69 | #endif | |
e144710b | 70 | struct irqaction *action; /* IRQ action list */ |
a6967caf TG |
71 | #ifdef CONFIG_GENERIC_HARDIRQS_NO_COMPAT |
72 | unsigned int status_use_accessors; | |
73 | #else | |
e144710b | 74 | unsigned int status; /* IRQ status */ |
a6967caf | 75 | #endif |
dbec07ba | 76 | unsigned int core_internal_state__do_not_mess_with_it; |
e144710b TG |
77 | unsigned int depth; /* nested irq disables */ |
78 | unsigned int wake_depth; /* nested wake enables */ | |
79 | unsigned int irq_count; /* For detecting broken IRQs */ | |
80 | unsigned long last_unhandled; /* Aging timer for unhandled count */ | |
81 | unsigned int irqs_unhandled; | |
82 | raw_spinlock_t lock; | |
83 | #ifdef CONFIG_SMP | |
84 | const struct cpumask *affinity_hint; | |
cd7eab44 | 85 | struct irq_affinity_notify *affinity_notify; |
e144710b TG |
86 | #ifdef CONFIG_GENERIC_PENDING_IRQ |
87 | cpumask_var_t pending_mask; | |
88 | #endif | |
89 | #endif | |
b5faba21 | 90 | unsigned long threads_oneshot; |
e144710b TG |
91 | atomic_t threads_active; |
92 | wait_queue_head_t wait_for_threads; | |
93 | #ifdef CONFIG_PROC_FS | |
94 | struct proc_dir_entry *dir; | |
95 | #endif | |
96 | const char *name; | |
97 | } ____cacheline_internodealigned_in_smp; | |
98 | ||
e144710b TG |
99 | #ifndef CONFIG_SPARSE_IRQ |
100 | extern struct irq_desc irq_desc[NR_IRQS]; | |
101 | #endif | |
102 | ||
78f90d91 TG |
103 | /* Will be removed once the last users in power and sh are gone */ |
104 | extern struct irq_desc *irq_to_desc_alloc_node(unsigned int irq, int node); | |
e144710b TG |
105 | static inline struct irq_desc *move_irq_desc(struct irq_desc *desc, int node) |
106 | { | |
107 | return desc; | |
108 | } | |
e144710b TG |
109 | |
110 | #ifdef CONFIG_GENERIC_HARDIRQS | |
111 | ||
d9936bb3 TG |
112 | static inline struct irq_data *irq_desc_get_irq_data(struct irq_desc *desc) |
113 | { | |
114 | return &desc->irq_data; | |
115 | } | |
116 | ||
a0cd9ca2 TG |
117 | static inline struct irq_chip *irq_desc_get_chip(struct irq_desc *desc) |
118 | { | |
119 | return desc->irq_data.chip; | |
120 | } | |
121 | ||
122 | static inline void *irq_desc_get_chip_data(struct irq_desc *desc) | |
123 | { | |
124 | return desc->irq_data.chip_data; | |
125 | } | |
126 | ||
127 | static inline void *irq_desc_get_handler_data(struct irq_desc *desc) | |
128 | { | |
129 | return desc->irq_data.handler_data; | |
130 | } | |
131 | ||
132 | static inline struct msi_desc *irq_desc_get_msi_desc(struct irq_desc *desc) | |
133 | { | |
134 | return desc->irq_data.msi_desc; | |
135 | } | |
136 | ||
137 | #ifndef CONFIG_GENERIC_HARDIRQS_NO_COMPAT | |
138 | static inline struct irq_chip *get_irq_desc_chip(struct irq_desc *desc) | |
139 | { | |
140 | return irq_desc_get_chip(desc); | |
141 | } | |
142 | static inline void *get_irq_desc_data(struct irq_desc *desc) | |
143 | { | |
144 | return irq_desc_get_handler_data(desc); | |
145 | } | |
146 | ||
147 | static inline void *get_irq_desc_chip_data(struct irq_desc *desc) | |
148 | { | |
149 | return irq_desc_get_chip_data(desc); | |
150 | } | |
151 | ||
152 | static inline struct msi_desc *get_irq_desc_msi(struct irq_desc *desc) | |
153 | { | |
154 | return irq_desc_get_msi_desc(desc); | |
155 | } | |
156 | #endif | |
e144710b | 157 | |
e144710b TG |
158 | /* |
159 | * Architectures call this to let the generic IRQ layer | |
160 | * handle an interrupt. If the descriptor is attached to an | |
161 | * irqchip-style controller then we call the ->handle_irq() handler, | |
162 | * and it calls __do_IRQ() if it's attached to an irqtype-style controller. | |
163 | */ | |
164 | static inline void generic_handle_irq_desc(unsigned int irq, struct irq_desc *desc) | |
165 | { | |
e144710b | 166 | desc->handle_irq(irq, desc); |
e144710b TG |
167 | } |
168 | ||
169 | static inline void generic_handle_irq(unsigned int irq) | |
170 | { | |
171 | generic_handle_irq_desc(irq, irq_to_desc(irq)); | |
172 | } | |
173 | ||
174 | /* Test to see if a driver has successfully requested an irq */ | |
175 | static inline int irq_has_action(unsigned int irq) | |
176 | { | |
177 | struct irq_desc *desc = irq_to_desc(irq); | |
178 | return desc->action != NULL; | |
179 | } | |
180 | ||
a6967caf | 181 | #ifndef CONFIG_GENERIC_HARDIRQS_NO_COMPAT |
e144710b TG |
182 | static inline int irq_balancing_disabled(unsigned int irq) |
183 | { | |
184 | struct irq_desc *desc; | |
185 | ||
186 | desc = irq_to_desc(irq); | |
187 | return desc->status & IRQ_NO_BALANCING_MASK; | |
188 | } | |
a6967caf | 189 | #endif |
e144710b TG |
190 | |
191 | /* caller has locked the irq_desc and both params are valid */ | |
192 | static inline void __set_irq_handler_unlocked(int irq, | |
193 | irq_flow_handler_t handler) | |
194 | { | |
195 | struct irq_desc *desc; | |
196 | ||
197 | desc = irq_to_desc(irq); | |
198 | desc->handle_irq = handler; | |
199 | } | |
78129576 TG |
200 | |
201 | #ifdef CONFIG_IRQ_PREFLOW_FASTEOI | |
202 | static inline void | |
203 | __irq_set_preflow_handler(unsigned int irq, irq_preflow_handler_t handler) | |
204 | { | |
205 | struct irq_desc *desc; | |
206 | ||
207 | desc = irq_to_desc(irq); | |
208 | desc->preflow_handler = handler; | |
209 | } | |
210 | #endif | |
e144710b TG |
211 | #endif |
212 | ||
213 | #endif |