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e144710b TG |
1 | #ifndef _LINUX_IRQDESC_H |
2 | #define _LINUX_IRQDESC_H | |
3 | ||
425a5072 | 4 | #include <linux/rcupdate.h> |
ecb3f394 | 5 | #include <linux/kobject.h> |
425a5072 | 6 | |
e144710b TG |
7 | /* |
8 | * Core internal functions to deal with irq descriptors | |
e144710b TG |
9 | */ |
10 | ||
cd7eab44 | 11 | struct irq_affinity_notify; |
e144710b | 12 | struct proc_dir_entry; |
ec53cf23 | 13 | struct module; |
293a7a0a | 14 | struct irq_desc; |
76ba59f8 MZ |
15 | struct irq_domain; |
16 | struct pt_regs; | |
293a7a0a | 17 | |
e144710b TG |
18 | /** |
19 | * struct irq_desc - interrupt descriptor | |
0d0b4c86 | 20 | * @irq_common_data: per irq and chip data passed down to chip functions |
e144710b | 21 | * @kstat_irqs: irq stats per cpu |
77076778 GU |
22 | * @handle_irq: highlevel irq-events handler |
23 | * @preflow_handler: handler called before the flow handler (currently used by sparc) | |
e144710b TG |
24 | * @action: the irq action chain |
25 | * @status: status information | |
dbec07ba | 26 | * @core_internal_state__do_not_mess_with_it: core internal status information |
e144710b | 27 | * @depth: disable-depth, for nested irq_disable() calls |
0911f124 | 28 | * @wake_depth: enable depth, for multiple irq_set_irq_wake() callers |
e144710b TG |
29 | * @irq_count: stats field to detect stalled irqs |
30 | * @last_unhandled: aging timer for unhandled count | |
31 | * @irqs_unhandled: stats field for spurious unhandled interrupts | |
1e77d0a1 TG |
32 | * @threads_handled: stats field for deferred spurious detection of threaded handlers |
33 | * @threads_handled_last: comparator field for deferred spurious detection of theraded handlers | |
e144710b | 34 | * @lock: locking for SMP |
77076778 | 35 | * @affinity_hint: hint to user space for preferred irq affinity |
cd7eab44 | 36 | * @affinity_notify: context for notification of affinity changes |
e144710b | 37 | * @pending_mask: pending rebalanced interrupts |
b5faba21 | 38 | * @threads_oneshot: bitfield to handle shared oneshot threads |
e144710b TG |
39 | * @threads_active: number of irqaction threads currently running |
40 | * @wait_for_threads: wait queue for sync_irq to wait for threaded handlers | |
cab303be TG |
41 | * @nr_actions: number of installed actions on this descriptor |
42 | * @no_suspend_depth: number of irqactions on a irq descriptor with | |
43 | * IRQF_NO_SUSPEND set | |
44 | * @force_resume_depth: number of irqactions on a irq descriptor with | |
45 | * IRQF_FORCE_RESUME set | |
425a5072 | 46 | * @rcu: rcu head for delayed free |
ecb3f394 | 47 | * @kobj: kobject used to represent this struct in sysfs |
e144710b | 48 | * @dir: /proc/irq/ procfs entry |
087cdfb6 | 49 | * @debugfs_file: dentry for the debugfs file |
e144710b TG |
50 | * @name: flow handler name for /proc/interrupts output |
51 | */ | |
52 | struct irq_desc { | |
0d0b4c86 | 53 | struct irq_common_data irq_common_data; |
e144710b | 54 | struct irq_data irq_data; |
6c9ae009 | 55 | unsigned int __percpu *kstat_irqs; |
e144710b | 56 | irq_flow_handler_t handle_irq; |
78129576 TG |
57 | #ifdef CONFIG_IRQ_PREFLOW_FASTEOI |
58 | irq_preflow_handler_t preflow_handler; | |
59 | #endif | |
e144710b | 60 | struct irqaction *action; /* IRQ action list */ |
a6967caf | 61 | unsigned int status_use_accessors; |
dbec07ba | 62 | unsigned int core_internal_state__do_not_mess_with_it; |
e144710b TG |
63 | unsigned int depth; /* nested irq disables */ |
64 | unsigned int wake_depth; /* nested wake enables */ | |
65 | unsigned int irq_count; /* For detecting broken IRQs */ | |
66 | unsigned long last_unhandled; /* Aging timer for unhandled count */ | |
67 | unsigned int irqs_unhandled; | |
1e77d0a1 TG |
68 | atomic_t threads_handled; |
69 | int threads_handled_last; | |
e144710b | 70 | raw_spinlock_t lock; |
31d9d9b6 | 71 | struct cpumask *percpu_enabled; |
222df54f | 72 | const struct cpumask *percpu_affinity; |
e144710b TG |
73 | #ifdef CONFIG_SMP |
74 | const struct cpumask *affinity_hint; | |
cd7eab44 | 75 | struct irq_affinity_notify *affinity_notify; |
e144710b TG |
76 | #ifdef CONFIG_GENERIC_PENDING_IRQ |
77 | cpumask_var_t pending_mask; | |
78 | #endif | |
79 | #endif | |
b5faba21 | 80 | unsigned long threads_oneshot; |
e144710b TG |
81 | atomic_t threads_active; |
82 | wait_queue_head_t wait_for_threads; | |
cab303be TG |
83 | #ifdef CONFIG_PM_SLEEP |
84 | unsigned int nr_actions; | |
85 | unsigned int no_suspend_depth; | |
17f48034 | 86 | unsigned int cond_suspend_depth; |
cab303be TG |
87 | unsigned int force_resume_depth; |
88 | #endif | |
e144710b TG |
89 | #ifdef CONFIG_PROC_FS |
90 | struct proc_dir_entry *dir; | |
425a5072 | 91 | #endif |
087cdfb6 TG |
92 | #ifdef CONFIG_GENERIC_IRQ_DEBUGFS |
93 | struct dentry *debugfs_file; | |
94 | #endif | |
425a5072 TG |
95 | #ifdef CONFIG_SPARSE_IRQ |
96 | struct rcu_head rcu; | |
ecb3f394 | 97 | struct kobject kobj; |
e144710b | 98 | #endif |
293a7a0a | 99 | int parent_irq; |
b6873807 | 100 | struct module *owner; |
e144710b TG |
101 | const char *name; |
102 | } ____cacheline_internodealigned_in_smp; | |
103 | ||
a8994181 TG |
104 | #ifdef CONFIG_SPARSE_IRQ |
105 | extern void irq_lock_sparse(void); | |
106 | extern void irq_unlock_sparse(void); | |
107 | #else | |
108 | static inline void irq_lock_sparse(void) { } | |
109 | static inline void irq_unlock_sparse(void) { } | |
e144710b TG |
110 | extern struct irq_desc irq_desc[NR_IRQS]; |
111 | #endif | |
112 | ||
7bbf1dd2 JL |
113 | static inline struct irq_desc *irq_data_to_desc(struct irq_data *data) |
114 | { | |
755d119a | 115 | return container_of(data->common, struct irq_desc, irq_common_data); |
7bbf1dd2 JL |
116 | } |
117 | ||
304adf8a JL |
118 | static inline unsigned int irq_desc_get_irq(struct irq_desc *desc) |
119 | { | |
120 | return desc->irq_data.irq; | |
121 | } | |
122 | ||
d9936bb3 TG |
123 | static inline struct irq_data *irq_desc_get_irq_data(struct irq_desc *desc) |
124 | { | |
125 | return &desc->irq_data; | |
126 | } | |
127 | ||
a0cd9ca2 TG |
128 | static inline struct irq_chip *irq_desc_get_chip(struct irq_desc *desc) |
129 | { | |
130 | return desc->irq_data.chip; | |
131 | } | |
132 | ||
133 | static inline void *irq_desc_get_chip_data(struct irq_desc *desc) | |
134 | { | |
135 | return desc->irq_data.chip_data; | |
136 | } | |
137 | ||
138 | static inline void *irq_desc_get_handler_data(struct irq_desc *desc) | |
139 | { | |
af7080e0 | 140 | return desc->irq_common_data.handler_data; |
a0cd9ca2 TG |
141 | } |
142 | ||
143 | static inline struct msi_desc *irq_desc_get_msi_desc(struct irq_desc *desc) | |
144 | { | |
b237721c | 145 | return desc->irq_common_data.msi_desc; |
a0cd9ca2 TG |
146 | } |
147 | ||
e144710b TG |
148 | /* |
149 | * Architectures call this to let the generic IRQ layer | |
6584d84c | 150 | * handle an interrupt. |
e144710b | 151 | */ |
bd0b9ac4 | 152 | static inline void generic_handle_irq_desc(struct irq_desc *desc) |
e144710b | 153 | { |
bd0b9ac4 | 154 | desc->handle_irq(desc); |
e144710b TG |
155 | } |
156 | ||
fe12bc2c | 157 | int generic_handle_irq(unsigned int irq); |
e144710b | 158 | |
76ba59f8 MZ |
159 | #ifdef CONFIG_HANDLE_DOMAIN_IRQ |
160 | /* | |
161 | * Convert a HW interrupt number to a logical one using a IRQ domain, | |
162 | * and handle the result interrupt number. Return -EINVAL if | |
163 | * conversion failed. Providing a NULL domain indicates that the | |
164 | * conversion has already been done. | |
165 | */ | |
166 | int __handle_domain_irq(struct irq_domain *domain, unsigned int hwirq, | |
167 | bool lookup, struct pt_regs *regs); | |
168 | ||
169 | static inline int handle_domain_irq(struct irq_domain *domain, | |
170 | unsigned int hwirq, struct pt_regs *regs) | |
171 | { | |
172 | return __handle_domain_irq(domain, hwirq, true, regs); | |
173 | } | |
174 | #endif | |
175 | ||
e144710b | 176 | /* Test to see if a driver has successfully requested an irq */ |
f61ae4fb | 177 | static inline int irq_desc_has_action(struct irq_desc *desc) |
e144710b | 178 | { |
e144710b TG |
179 | return desc->action != NULL; |
180 | } | |
181 | ||
f61ae4fb TG |
182 | static inline int irq_has_action(unsigned int irq) |
183 | { | |
184 | return irq_desc_has_action(irq_to_desc(irq)); | |
185 | } | |
186 | ||
bbc9d21f TG |
187 | /** |
188 | * irq_set_handler_locked - Set irq handler from a locked region | |
189 | * @data: Pointer to the irq_data structure which identifies the irq | |
190 | * @handler: Flow control handler function for this interrupt | |
191 | * | |
192 | * Sets the handler in the irq descriptor associated to @data. | |
193 | * | |
194 | * Must be called with irq_desc locked and valid parameters. Typical | |
195 | * call site is the irq_set_type() callback. | |
196 | */ | |
197 | static inline void irq_set_handler_locked(struct irq_data *data, | |
198 | irq_flow_handler_t handler) | |
199 | { | |
200 | struct irq_desc *desc = irq_data_to_desc(data); | |
201 | ||
202 | desc->handle_irq = handler; | |
203 | } | |
204 | ||
205 | /** | |
206 | * irq_set_chip_handler_name_locked - Set chip, handler and name from a locked region | |
207 | * @data: Pointer to the irq_data structure for which the chip is set | |
208 | * @chip: Pointer to the new irq chip | |
209 | * @handler: Flow control handler function for this interrupt | |
210 | * @name: Name of the interrupt | |
211 | * | |
212 | * Replace the irq chip at the proper hierarchy level in @data and | |
213 | * sets the handler and name in the associated irq descriptor. | |
214 | * | |
215 | * Must be called with irq_desc locked and valid parameters. | |
216 | */ | |
217 | static inline void | |
218 | irq_set_chip_handler_name_locked(struct irq_data *data, struct irq_chip *chip, | |
219 | irq_flow_handler_t handler, const char *name) | |
220 | { | |
221 | struct irq_desc *desc = irq_data_to_desc(data); | |
222 | ||
223 | desc->handle_irq = handler; | |
224 | desc->name = name; | |
225 | data->chip = chip; | |
226 | } | |
227 | ||
a2e8461a | 228 | static inline int irq_balancing_disabled(unsigned int irq) |
e144710b TG |
229 | { |
230 | struct irq_desc *desc; | |
231 | ||
232 | desc = irq_to_desc(irq); | |
0c6f8a8b | 233 | return desc->status_use_accessors & IRQ_NO_BALANCING_MASK; |
e144710b | 234 | } |
78129576 | 235 | |
7f4a8e7b VK |
236 | static inline int irq_is_percpu(unsigned int irq) |
237 | { | |
238 | struct irq_desc *desc; | |
239 | ||
240 | desc = irq_to_desc(irq); | |
241 | return desc->status_use_accessors & IRQ_PER_CPU; | |
242 | } | |
243 | ||
d3e17deb TG |
244 | static inline void |
245 | irq_set_lockdep_class(unsigned int irq, struct lock_class_key *class) | |
246 | { | |
247 | struct irq_desc *desc = irq_to_desc(irq); | |
248 | ||
249 | if (desc) | |
250 | lockdep_set_class(&desc->lock, class); | |
251 | } | |
252 | ||
78129576 TG |
253 | #ifdef CONFIG_IRQ_PREFLOW_FASTEOI |
254 | static inline void | |
255 | __irq_set_preflow_handler(unsigned int irq, irq_preflow_handler_t handler) | |
256 | { | |
257 | struct irq_desc *desc; | |
258 | ||
259 | desc = irq_to_desc(irq); | |
260 | desc->preflow_handler = handler; | |
261 | } | |
262 | #endif | |
e144710b TG |
263 | |
264 | #endif |