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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 | |
20 | * @irq_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 { | |
e144710b | 50 | struct irq_data irq_data; |
6c9ae009 | 51 | unsigned int __percpu *kstat_irqs; |
e144710b | 52 | irq_flow_handler_t handle_irq; |
78129576 TG |
53 | #ifdef CONFIG_IRQ_PREFLOW_FASTEOI |
54 | irq_preflow_handler_t preflow_handler; | |
55 | #endif | |
e144710b | 56 | struct irqaction *action; /* IRQ action list */ |
a6967caf | 57 | unsigned int status_use_accessors; |
dbec07ba | 58 | unsigned int core_internal_state__do_not_mess_with_it; |
e144710b TG |
59 | unsigned int depth; /* nested irq disables */ |
60 | unsigned int wake_depth; /* nested wake enables */ | |
61 | unsigned int irq_count; /* For detecting broken IRQs */ | |
62 | unsigned long last_unhandled; /* Aging timer for unhandled count */ | |
63 | unsigned int irqs_unhandled; | |
1e77d0a1 TG |
64 | atomic_t threads_handled; |
65 | int threads_handled_last; | |
e144710b | 66 | raw_spinlock_t lock; |
31d9d9b6 | 67 | struct cpumask *percpu_enabled; |
e144710b TG |
68 | #ifdef CONFIG_SMP |
69 | const struct cpumask *affinity_hint; | |
cd7eab44 | 70 | struct irq_affinity_notify *affinity_notify; |
e144710b TG |
71 | #ifdef CONFIG_GENERIC_PENDING_IRQ |
72 | cpumask_var_t pending_mask; | |
73 | #endif | |
74 | #endif | |
b5faba21 | 75 | unsigned long threads_oneshot; |
e144710b TG |
76 | atomic_t threads_active; |
77 | wait_queue_head_t wait_for_threads; | |
cab303be TG |
78 | #ifdef CONFIG_PM_SLEEP |
79 | unsigned int nr_actions; | |
80 | unsigned int no_suspend_depth; | |
17f48034 | 81 | unsigned int cond_suspend_depth; |
cab303be TG |
82 | unsigned int force_resume_depth; |
83 | #endif | |
e144710b TG |
84 | #ifdef CONFIG_PROC_FS |
85 | struct proc_dir_entry *dir; | |
86 | #endif | |
293a7a0a | 87 | int parent_irq; |
b6873807 | 88 | struct module *owner; |
e144710b TG |
89 | const char *name; |
90 | } ____cacheline_internodealigned_in_smp; | |
91 | ||
e144710b TG |
92 | #ifndef CONFIG_SPARSE_IRQ |
93 | extern struct irq_desc irq_desc[NR_IRQS]; | |
94 | #endif | |
95 | ||
d9936bb3 TG |
96 | static inline struct irq_data *irq_desc_get_irq_data(struct irq_desc *desc) |
97 | { | |
98 | return &desc->irq_data; | |
99 | } | |
100 | ||
a0cd9ca2 TG |
101 | static inline struct irq_chip *irq_desc_get_chip(struct irq_desc *desc) |
102 | { | |
103 | return desc->irq_data.chip; | |
104 | } | |
105 | ||
106 | static inline void *irq_desc_get_chip_data(struct irq_desc *desc) | |
107 | { | |
108 | return desc->irq_data.chip_data; | |
109 | } | |
110 | ||
111 | static inline void *irq_desc_get_handler_data(struct irq_desc *desc) | |
112 | { | |
113 | return desc->irq_data.handler_data; | |
114 | } | |
115 | ||
116 | static inline struct msi_desc *irq_desc_get_msi_desc(struct irq_desc *desc) | |
117 | { | |
118 | return desc->irq_data.msi_desc; | |
119 | } | |
120 | ||
e144710b TG |
121 | /* |
122 | * Architectures call this to let the generic IRQ layer | |
123 | * handle an interrupt. If the descriptor is attached to an | |
124 | * irqchip-style controller then we call the ->handle_irq() handler, | |
125 | * and it calls __do_IRQ() if it's attached to an irqtype-style controller. | |
126 | */ | |
127 | static inline void generic_handle_irq_desc(unsigned int irq, struct irq_desc *desc) | |
128 | { | |
e144710b | 129 | desc->handle_irq(irq, desc); |
e144710b TG |
130 | } |
131 | ||
fe12bc2c | 132 | int generic_handle_irq(unsigned int irq); |
e144710b | 133 | |
76ba59f8 MZ |
134 | #ifdef CONFIG_HANDLE_DOMAIN_IRQ |
135 | /* | |
136 | * Convert a HW interrupt number to a logical one using a IRQ domain, | |
137 | * and handle the result interrupt number. Return -EINVAL if | |
138 | * conversion failed. Providing a NULL domain indicates that the | |
139 | * conversion has already been done. | |
140 | */ | |
141 | int __handle_domain_irq(struct irq_domain *domain, unsigned int hwirq, | |
142 | bool lookup, struct pt_regs *regs); | |
143 | ||
144 | static inline int handle_domain_irq(struct irq_domain *domain, | |
145 | unsigned int hwirq, struct pt_regs *regs) | |
146 | { | |
147 | return __handle_domain_irq(domain, hwirq, true, regs); | |
148 | } | |
149 | #endif | |
150 | ||
e144710b TG |
151 | /* Test to see if a driver has successfully requested an irq */ |
152 | static inline int irq_has_action(unsigned int irq) | |
153 | { | |
154 | struct irq_desc *desc = irq_to_desc(irq); | |
155 | return desc->action != NULL; | |
156 | } | |
157 | ||
a2e8461a TG |
158 | /* caller has locked the irq_desc and both params are valid */ |
159 | static inline void __irq_set_handler_locked(unsigned int irq, | |
160 | irq_flow_handler_t handler) | |
e144710b TG |
161 | { |
162 | struct irq_desc *desc; | |
163 | ||
164 | desc = irq_to_desc(irq); | |
a2e8461a | 165 | desc->handle_irq = handler; |
e144710b TG |
166 | } |
167 | ||
168 | /* caller has locked the irq_desc and both params are valid */ | |
a2e8461a TG |
169 | static inline void |
170 | __irq_set_chip_handler_name_locked(unsigned int irq, struct irq_chip *chip, | |
171 | irq_flow_handler_t handler, const char *name) | |
172 | { | |
173 | struct irq_desc *desc; | |
174 | ||
175 | desc = irq_to_desc(irq); | |
176 | irq_desc_get_irq_data(desc)->chip = chip; | |
177 | desc->handle_irq = handler; | |
178 | desc->name = name; | |
179 | } | |
180 | ||
a2e8461a | 181 | static inline int irq_balancing_disabled(unsigned int irq) |
e144710b TG |
182 | { |
183 | struct irq_desc *desc; | |
184 | ||
185 | desc = irq_to_desc(irq); | |
0c6f8a8b | 186 | return desc->status_use_accessors & IRQ_NO_BALANCING_MASK; |
e144710b | 187 | } |
78129576 | 188 | |
7f4a8e7b VK |
189 | static inline int irq_is_percpu(unsigned int irq) |
190 | { | |
191 | struct irq_desc *desc; | |
192 | ||
193 | desc = irq_to_desc(irq); | |
194 | return desc->status_use_accessors & IRQ_PER_CPU; | |
195 | } | |
196 | ||
d3e17deb TG |
197 | static inline void |
198 | irq_set_lockdep_class(unsigned int irq, struct lock_class_key *class) | |
199 | { | |
200 | struct irq_desc *desc = irq_to_desc(irq); | |
201 | ||
202 | if (desc) | |
203 | lockdep_set_class(&desc->lock, class); | |
204 | } | |
205 | ||
78129576 TG |
206 | #ifdef CONFIG_IRQ_PREFLOW_FASTEOI |
207 | static inline void | |
208 | __irq_set_preflow_handler(unsigned int irq, irq_preflow_handler_t handler) | |
209 | { | |
210 | struct irq_desc *desc; | |
211 | ||
212 | desc = irq_to_desc(irq); | |
213 | desc->preflow_handler = handler; | |
214 | } | |
215 | #endif | |
e144710b TG |
216 | |
217 | #endif |