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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 | 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 | |
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; | |
87 | #endif | |
293a7a0a | 88 | int parent_irq; |
b6873807 | 89 | struct module *owner; |
e144710b TG |
90 | const char *name; |
91 | } ____cacheline_internodealigned_in_smp; | |
92 | ||
e144710b TG |
93 | #ifndef CONFIG_SPARSE_IRQ |
94 | extern struct irq_desc irq_desc[NR_IRQS]; | |
95 | #endif | |
96 | ||
7bbf1dd2 JL |
97 | static inline struct irq_desc *irq_data_to_desc(struct irq_data *data) |
98 | { | |
99 | #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY | |
100 | return irq_to_desc(data->irq); | |
101 | #else | |
102 | return container_of(data, struct irq_desc, irq_data); | |
103 | #endif | |
104 | } | |
105 | ||
d9936bb3 TG |
106 | static inline struct irq_data *irq_desc_get_irq_data(struct irq_desc *desc) |
107 | { | |
108 | return &desc->irq_data; | |
109 | } | |
110 | ||
a0cd9ca2 TG |
111 | static inline struct irq_chip *irq_desc_get_chip(struct irq_desc *desc) |
112 | { | |
113 | return desc->irq_data.chip; | |
114 | } | |
115 | ||
116 | static inline void *irq_desc_get_chip_data(struct irq_desc *desc) | |
117 | { | |
118 | return desc->irq_data.chip_data; | |
119 | } | |
120 | ||
121 | static inline void *irq_desc_get_handler_data(struct irq_desc *desc) | |
122 | { | |
123 | return desc->irq_data.handler_data; | |
124 | } | |
125 | ||
126 | static inline struct msi_desc *irq_desc_get_msi_desc(struct irq_desc *desc) | |
127 | { | |
128 | return desc->irq_data.msi_desc; | |
129 | } | |
130 | ||
e144710b TG |
131 | /* |
132 | * Architectures call this to let the generic IRQ layer | |
133 | * handle an interrupt. If the descriptor is attached to an | |
134 | * irqchip-style controller then we call the ->handle_irq() handler, | |
135 | * and it calls __do_IRQ() if it's attached to an irqtype-style controller. | |
136 | */ | |
137 | static inline void generic_handle_irq_desc(unsigned int irq, struct irq_desc *desc) | |
138 | { | |
e144710b | 139 | desc->handle_irq(irq, desc); |
e144710b TG |
140 | } |
141 | ||
fe12bc2c | 142 | int generic_handle_irq(unsigned int irq); |
e144710b | 143 | |
76ba59f8 MZ |
144 | #ifdef CONFIG_HANDLE_DOMAIN_IRQ |
145 | /* | |
146 | * Convert a HW interrupt number to a logical one using a IRQ domain, | |
147 | * and handle the result interrupt number. Return -EINVAL if | |
148 | * conversion failed. Providing a NULL domain indicates that the | |
149 | * conversion has already been done. | |
150 | */ | |
151 | int __handle_domain_irq(struct irq_domain *domain, unsigned int hwirq, | |
152 | bool lookup, struct pt_regs *regs); | |
153 | ||
154 | static inline int handle_domain_irq(struct irq_domain *domain, | |
155 | unsigned int hwirq, struct pt_regs *regs) | |
156 | { | |
157 | return __handle_domain_irq(domain, hwirq, true, regs); | |
158 | } | |
159 | #endif | |
160 | ||
e144710b TG |
161 | /* Test to see if a driver has successfully requested an irq */ |
162 | static inline int irq_has_action(unsigned int irq) | |
163 | { | |
164 | struct irq_desc *desc = irq_to_desc(irq); | |
165 | return desc->action != NULL; | |
166 | } | |
167 | ||
a2e8461a TG |
168 | /* caller has locked the irq_desc and both params are valid */ |
169 | static inline void __irq_set_handler_locked(unsigned int irq, | |
170 | irq_flow_handler_t handler) | |
e144710b TG |
171 | { |
172 | struct irq_desc *desc; | |
173 | ||
174 | desc = irq_to_desc(irq); | |
a2e8461a | 175 | desc->handle_irq = handler; |
e144710b TG |
176 | } |
177 | ||
178 | /* caller has locked the irq_desc and both params are valid */ | |
a2e8461a TG |
179 | static inline void |
180 | __irq_set_chip_handler_name_locked(unsigned int irq, struct irq_chip *chip, | |
181 | irq_flow_handler_t handler, const char *name) | |
182 | { | |
183 | struct irq_desc *desc; | |
184 | ||
185 | desc = irq_to_desc(irq); | |
186 | irq_desc_get_irq_data(desc)->chip = chip; | |
187 | desc->handle_irq = handler; | |
188 | desc->name = name; | |
189 | } | |
190 | ||
a2e8461a | 191 | static inline int irq_balancing_disabled(unsigned int irq) |
e144710b TG |
192 | { |
193 | struct irq_desc *desc; | |
194 | ||
195 | desc = irq_to_desc(irq); | |
0c6f8a8b | 196 | return desc->status_use_accessors & IRQ_NO_BALANCING_MASK; |
e144710b | 197 | } |
78129576 | 198 | |
7f4a8e7b VK |
199 | static inline int irq_is_percpu(unsigned int irq) |
200 | { | |
201 | struct irq_desc *desc; | |
202 | ||
203 | desc = irq_to_desc(irq); | |
204 | return desc->status_use_accessors & IRQ_PER_CPU; | |
205 | } | |
206 | ||
d3e17deb TG |
207 | static inline void |
208 | irq_set_lockdep_class(unsigned int irq, struct lock_class_key *class) | |
209 | { | |
210 | struct irq_desc *desc = irq_to_desc(irq); | |
211 | ||
212 | if (desc) | |
213 | lockdep_set_class(&desc->lock, class); | |
214 | } | |
215 | ||
78129576 TG |
216 | #ifdef CONFIG_IRQ_PREFLOW_FASTEOI |
217 | static inline void | |
218 | __irq_set_preflow_handler(unsigned int irq, irq_preflow_handler_t handler) | |
219 | { | |
220 | struct irq_desc *desc; | |
221 | ||
222 | desc = irq_to_desc(irq); | |
223 | desc->preflow_handler = handler; | |
224 | } | |
225 | #endif | |
e144710b TG |
226 | |
227 | #endif |