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e144710b TG |
1 | #ifndef _LINUX_IRQDESC_H |
2 | #define _LINUX_IRQDESC_H | |
3 | ||
425a5072 TG |
4 | #include <linux/rcupdate.h> |
5 | ||
e144710b TG |
6 | /* |
7 | * Core internal functions to deal with irq descriptors | |
e144710b TG |
8 | */ |
9 | ||
cd7eab44 | 10 | struct irq_affinity_notify; |
e144710b | 11 | struct proc_dir_entry; |
ec53cf23 | 12 | struct module; |
293a7a0a | 13 | struct irq_desc; |
76ba59f8 MZ |
14 | struct irq_domain; |
15 | struct pt_regs; | |
293a7a0a | 16 | |
e144710b TG |
17 | /** |
18 | * struct irq_desc - interrupt descriptor | |
0d0b4c86 | 19 | * @irq_common_data: per irq and chip data passed down to chip functions |
e144710b | 20 | * @kstat_irqs: irq stats per cpu |
77076778 GU |
21 | * @handle_irq: highlevel irq-events handler |
22 | * @preflow_handler: handler called before the flow handler (currently used by sparc) | |
e144710b TG |
23 | * @action: the irq action chain |
24 | * @status: status information | |
dbec07ba | 25 | * @core_internal_state__do_not_mess_with_it: core internal status information |
e144710b | 26 | * @depth: disable-depth, for nested irq_disable() calls |
0911f124 | 27 | * @wake_depth: enable depth, for multiple irq_set_irq_wake() callers |
e144710b TG |
28 | * @irq_count: stats field to detect stalled irqs |
29 | * @last_unhandled: aging timer for unhandled count | |
30 | * @irqs_unhandled: stats field for spurious unhandled interrupts | |
1e77d0a1 TG |
31 | * @threads_handled: stats field for deferred spurious detection of threaded handlers |
32 | * @threads_handled_last: comparator field for deferred spurious detection of theraded handlers | |
e144710b | 33 | * @lock: locking for SMP |
77076778 | 34 | * @affinity_hint: hint to user space for preferred irq affinity |
cd7eab44 | 35 | * @affinity_notify: context for notification of affinity changes |
e144710b | 36 | * @pending_mask: pending rebalanced interrupts |
b5faba21 | 37 | * @threads_oneshot: bitfield to handle shared oneshot threads |
e144710b TG |
38 | * @threads_active: number of irqaction threads currently running |
39 | * @wait_for_threads: wait queue for sync_irq to wait for threaded handlers | |
cab303be TG |
40 | * @nr_actions: number of installed actions on this descriptor |
41 | * @no_suspend_depth: number of irqactions on a irq descriptor with | |
42 | * IRQF_NO_SUSPEND set | |
43 | * @force_resume_depth: number of irqactions on a irq descriptor with | |
44 | * IRQF_FORCE_RESUME set | |
425a5072 | 45 | * @rcu: rcu head for delayed free |
e144710b TG |
46 | * @dir: /proc/irq/ procfs entry |
47 | * @name: flow handler name for /proc/interrupts output | |
48 | */ | |
49 | struct irq_desc { | |
0d0b4c86 | 50 | struct irq_common_data irq_common_data; |
e144710b | 51 | struct irq_data irq_data; |
6c9ae009 | 52 | unsigned int __percpu *kstat_irqs; |
e144710b | 53 | irq_flow_handler_t handle_irq; |
78129576 TG |
54 | #ifdef CONFIG_IRQ_PREFLOW_FASTEOI |
55 | irq_preflow_handler_t preflow_handler; | |
56 | #endif | |
e144710b | 57 | struct irqaction *action; /* IRQ action list */ |
a6967caf | 58 | unsigned int status_use_accessors; |
dbec07ba | 59 | unsigned int core_internal_state__do_not_mess_with_it; |
e144710b TG |
60 | unsigned int depth; /* nested irq disables */ |
61 | unsigned int wake_depth; /* nested wake enables */ | |
62 | unsigned int irq_count; /* For detecting broken IRQs */ | |
63 | unsigned long last_unhandled; /* Aging timer for unhandled count */ | |
64 | unsigned int irqs_unhandled; | |
1e77d0a1 TG |
65 | atomic_t threads_handled; |
66 | int threads_handled_last; | |
e144710b | 67 | raw_spinlock_t lock; |
31d9d9b6 | 68 | struct cpumask *percpu_enabled; |
e144710b TG |
69 | #ifdef CONFIG_SMP |
70 | const struct cpumask *affinity_hint; | |
cd7eab44 | 71 | struct irq_affinity_notify *affinity_notify; |
e144710b TG |
72 | #ifdef CONFIG_GENERIC_PENDING_IRQ |
73 | cpumask_var_t pending_mask; | |
74 | #endif | |
75 | #endif | |
b5faba21 | 76 | unsigned long threads_oneshot; |
e144710b TG |
77 | atomic_t threads_active; |
78 | wait_queue_head_t wait_for_threads; | |
cab303be TG |
79 | #ifdef CONFIG_PM_SLEEP |
80 | unsigned int nr_actions; | |
81 | unsigned int no_suspend_depth; | |
17f48034 | 82 | unsigned int cond_suspend_depth; |
cab303be TG |
83 | unsigned int force_resume_depth; |
84 | #endif | |
e144710b TG |
85 | #ifdef CONFIG_PROC_FS |
86 | struct proc_dir_entry *dir; | |
425a5072 TG |
87 | #endif |
88 | #ifdef CONFIG_SPARSE_IRQ | |
89 | struct rcu_head rcu; | |
e144710b | 90 | #endif |
293a7a0a | 91 | int parent_irq; |
b6873807 | 92 | struct module *owner; |
e144710b TG |
93 | const char *name; |
94 | } ____cacheline_internodealigned_in_smp; | |
95 | ||
a8994181 TG |
96 | #ifdef CONFIG_SPARSE_IRQ |
97 | extern void irq_lock_sparse(void); | |
98 | extern void irq_unlock_sparse(void); | |
99 | #else | |
100 | static inline void irq_lock_sparse(void) { } | |
101 | static inline void irq_unlock_sparse(void) { } | |
e144710b TG |
102 | extern struct irq_desc irq_desc[NR_IRQS]; |
103 | #endif | |
104 | ||
7bbf1dd2 JL |
105 | static inline struct irq_desc *irq_data_to_desc(struct irq_data *data) |
106 | { | |
755d119a | 107 | return container_of(data->common, struct irq_desc, irq_common_data); |
7bbf1dd2 JL |
108 | } |
109 | ||
304adf8a JL |
110 | static inline unsigned int irq_desc_get_irq(struct irq_desc *desc) |
111 | { | |
112 | return desc->irq_data.irq; | |
113 | } | |
114 | ||
d9936bb3 TG |
115 | static inline struct irq_data *irq_desc_get_irq_data(struct irq_desc *desc) |
116 | { | |
117 | return &desc->irq_data; | |
118 | } | |
119 | ||
a0cd9ca2 TG |
120 | static inline struct irq_chip *irq_desc_get_chip(struct irq_desc *desc) |
121 | { | |
122 | return desc->irq_data.chip; | |
123 | } | |
124 | ||
125 | static inline void *irq_desc_get_chip_data(struct irq_desc *desc) | |
126 | { | |
127 | return desc->irq_data.chip_data; | |
128 | } | |
129 | ||
130 | static inline void *irq_desc_get_handler_data(struct irq_desc *desc) | |
131 | { | |
af7080e0 | 132 | return desc->irq_common_data.handler_data; |
a0cd9ca2 TG |
133 | } |
134 | ||
135 | static inline struct msi_desc *irq_desc_get_msi_desc(struct irq_desc *desc) | |
136 | { | |
b237721c | 137 | return desc->irq_common_data.msi_desc; |
a0cd9ca2 TG |
138 | } |
139 | ||
e144710b TG |
140 | /* |
141 | * Architectures call this to let the generic IRQ layer | |
6584d84c | 142 | * handle an interrupt. |
e144710b | 143 | */ |
bd0b9ac4 | 144 | static inline void generic_handle_irq_desc(struct irq_desc *desc) |
e144710b | 145 | { |
bd0b9ac4 | 146 | desc->handle_irq(desc); |
e144710b TG |
147 | } |
148 | ||
fe12bc2c | 149 | int generic_handle_irq(unsigned int irq); |
e144710b | 150 | |
76ba59f8 MZ |
151 | #ifdef CONFIG_HANDLE_DOMAIN_IRQ |
152 | /* | |
153 | * Convert a HW interrupt number to a logical one using a IRQ domain, | |
154 | * and handle the result interrupt number. Return -EINVAL if | |
155 | * conversion failed. Providing a NULL domain indicates that the | |
156 | * conversion has already been done. | |
157 | */ | |
158 | int __handle_domain_irq(struct irq_domain *domain, unsigned int hwirq, | |
159 | bool lookup, struct pt_regs *regs); | |
160 | ||
161 | static inline int handle_domain_irq(struct irq_domain *domain, | |
162 | unsigned int hwirq, struct pt_regs *regs) | |
163 | { | |
164 | return __handle_domain_irq(domain, hwirq, true, regs); | |
165 | } | |
166 | #endif | |
167 | ||
e144710b | 168 | /* Test to see if a driver has successfully requested an irq */ |
f61ae4fb | 169 | static inline int irq_desc_has_action(struct irq_desc *desc) |
e144710b | 170 | { |
e144710b TG |
171 | return desc->action != NULL; |
172 | } | |
173 | ||
f61ae4fb TG |
174 | static inline int irq_has_action(unsigned int irq) |
175 | { | |
176 | return irq_desc_has_action(irq_to_desc(irq)); | |
177 | } | |
178 | ||
bbc9d21f TG |
179 | /** |
180 | * irq_set_handler_locked - Set irq handler from a locked region | |
181 | * @data: Pointer to the irq_data structure which identifies the irq | |
182 | * @handler: Flow control handler function for this interrupt | |
183 | * | |
184 | * Sets the handler in the irq descriptor associated to @data. | |
185 | * | |
186 | * Must be called with irq_desc locked and valid parameters. Typical | |
187 | * call site is the irq_set_type() callback. | |
188 | */ | |
189 | static inline void irq_set_handler_locked(struct irq_data *data, | |
190 | irq_flow_handler_t handler) | |
191 | { | |
192 | struct irq_desc *desc = irq_data_to_desc(data); | |
193 | ||
194 | desc->handle_irq = handler; | |
195 | } | |
196 | ||
197 | /** | |
198 | * irq_set_chip_handler_name_locked - Set chip, handler and name from a locked region | |
199 | * @data: Pointer to the irq_data structure for which the chip is set | |
200 | * @chip: Pointer to the new irq chip | |
201 | * @handler: Flow control handler function for this interrupt | |
202 | * @name: Name of the interrupt | |
203 | * | |
204 | * Replace the irq chip at the proper hierarchy level in @data and | |
205 | * sets the handler and name in the associated irq descriptor. | |
206 | * | |
207 | * Must be called with irq_desc locked and valid parameters. | |
208 | */ | |
209 | static inline void | |
210 | irq_set_chip_handler_name_locked(struct irq_data *data, struct irq_chip *chip, | |
211 | irq_flow_handler_t handler, const char *name) | |
212 | { | |
213 | struct irq_desc *desc = irq_data_to_desc(data); | |
214 | ||
215 | desc->handle_irq = handler; | |
216 | desc->name = name; | |
217 | data->chip = chip; | |
218 | } | |
219 | ||
a2e8461a | 220 | static inline int irq_balancing_disabled(unsigned int irq) |
e144710b TG |
221 | { |
222 | struct irq_desc *desc; | |
223 | ||
224 | desc = irq_to_desc(irq); | |
0c6f8a8b | 225 | return desc->status_use_accessors & IRQ_NO_BALANCING_MASK; |
e144710b | 226 | } |
78129576 | 227 | |
7f4a8e7b VK |
228 | static inline int irq_is_percpu(unsigned int irq) |
229 | { | |
230 | struct irq_desc *desc; | |
231 | ||
232 | desc = irq_to_desc(irq); | |
233 | return desc->status_use_accessors & IRQ_PER_CPU; | |
234 | } | |
235 | ||
d3e17deb TG |
236 | static inline void |
237 | irq_set_lockdep_class(unsigned int irq, struct lock_class_key *class) | |
238 | { | |
239 | struct irq_desc *desc = irq_to_desc(irq); | |
240 | ||
241 | if (desc) | |
242 | lockdep_set_class(&desc->lock, class); | |
243 | } | |
244 | ||
78129576 TG |
245 | #ifdef CONFIG_IRQ_PREFLOW_FASTEOI |
246 | static inline void | |
247 | __irq_set_preflow_handler(unsigned int irq, irq_preflow_handler_t handler) | |
248 | { | |
249 | struct irq_desc *desc; | |
250 | ||
251 | desc = irq_to_desc(irq); | |
252 | desc->preflow_handler = handler; | |
253 | } | |
254 | #endif | |
e144710b TG |
255 | |
256 | #endif |