regulator: Add support for RICOH PMIC RC5T583 regulator
[linux-2.6.git] / include / linux / irqdesc.h
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
11 struct irq_affinity_notify;
12 struct proc_dir_entry;
13 struct timer_rand_state;
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
20  * @preflow_handler:    handler called before the flow handler (currently used by sparc)
21  * @action:             the irq action chain
22  * @status:             status information
23  * @core_internal_state__do_not_mess_with_it: core internal status information
24  * @depth:              disable-depth, for nested irq_disable() calls
25  * @wake_depth:         enable depth, for multiple irq_set_irq_wake() callers
26  * @irq_count:          stats field to detect stalled irqs
27  * @last_unhandled:     aging timer for unhandled count
28  * @irqs_unhandled:     stats field for spurious unhandled interrupts
29  * @lock:               locking for SMP
30  * @affinity_hint:      hint to user space for preferred irq affinity
31  * @affinity_notify:    context for notification of affinity changes
32  * @pending_mask:       pending rebalanced interrupts
33  * @threads_oneshot:    bitfield to handle shared oneshot threads
34  * @threads_active:     number of irqaction threads currently running
35  * @wait_for_threads:   wait queue for sync_irq to wait for threaded handlers
36  * @dir:                /proc/irq/ procfs entry
37  * @name:               flow handler name for /proc/interrupts output
38  */
39 struct irq_desc {
40         struct irq_data         irq_data;
41         struct timer_rand_state *timer_rand_state;
42         unsigned int __percpu   *kstat_irqs;
43         irq_flow_handler_t      handle_irq;
44 #ifdef CONFIG_IRQ_PREFLOW_FASTEOI
45         irq_preflow_handler_t   preflow_handler;
46 #endif
47         struct irqaction        *action;        /* IRQ action list */
48         unsigned int            status_use_accessors;
49         unsigned int            core_internal_state__do_not_mess_with_it;
50         unsigned int            depth;          /* nested irq disables */
51         unsigned int            wake_depth;     /* nested wake enables */
52         unsigned int            irq_count;      /* For detecting broken IRQs */
53         unsigned long           last_unhandled; /* Aging timer for unhandled count */
54         unsigned int            irqs_unhandled;
55         raw_spinlock_t          lock;
56 #ifdef CONFIG_SMP
57         const struct cpumask    *affinity_hint;
58         struct irq_affinity_notify *affinity_notify;
59 #ifdef CONFIG_GENERIC_PENDING_IRQ
60         cpumask_var_t           pending_mask;
61 #endif
62 #endif
63         unsigned long           threads_oneshot;
64         atomic_t                threads_active;
65         wait_queue_head_t       wait_for_threads;
66 #ifdef CONFIG_PROC_FS
67         struct proc_dir_entry   *dir;
68 #endif
69         struct module           *owner;
70         const char              *name;
71 } ____cacheline_internodealigned_in_smp;
72
73 #ifndef CONFIG_SPARSE_IRQ
74 extern struct irq_desc irq_desc[NR_IRQS];
75 #endif
76
77 #ifdef CONFIG_GENERIC_HARDIRQS
78
79 static inline struct irq_data *irq_desc_get_irq_data(struct irq_desc *desc)
80 {
81         return &desc->irq_data;
82 }
83
84 static inline struct irq_chip *irq_desc_get_chip(struct irq_desc *desc)
85 {
86         return desc->irq_data.chip;
87 }
88
89 static inline void *irq_desc_get_chip_data(struct irq_desc *desc)
90 {
91         return desc->irq_data.chip_data;
92 }
93
94 static inline void *irq_desc_get_handler_data(struct irq_desc *desc)
95 {
96         return desc->irq_data.handler_data;
97 }
98
99 static inline struct msi_desc *irq_desc_get_msi_desc(struct irq_desc *desc)
100 {
101         return desc->irq_data.msi_desc;
102 }
103
104 /*
105  * Architectures call this to let the generic IRQ layer
106  * handle an interrupt. If the descriptor is attached to an
107  * irqchip-style controller then we call the ->handle_irq() handler,
108  * and it calls __do_IRQ() if it's attached to an irqtype-style controller.
109  */
110 static inline void generic_handle_irq_desc(unsigned int irq, struct irq_desc *desc)
111 {
112         desc->handle_irq(irq, desc);
113 }
114
115 int generic_handle_irq(unsigned int irq);
116
117 /* Test to see if a driver has successfully requested an irq */
118 static inline int irq_has_action(unsigned int irq)
119 {
120         struct irq_desc *desc = irq_to_desc(irq);
121         return desc->action != NULL;
122 }
123
124 /* caller has locked the irq_desc and both params are valid */
125 static inline void __irq_set_handler_locked(unsigned int irq,
126                                             irq_flow_handler_t handler)
127 {
128         struct irq_desc *desc;
129
130         desc = irq_to_desc(irq);
131         desc->handle_irq = handler;
132 }
133
134 /* caller has locked the irq_desc and both params are valid */
135 static inline void
136 __irq_set_chip_handler_name_locked(unsigned int irq, struct irq_chip *chip,
137                                    irq_flow_handler_t handler, const char *name)
138 {
139         struct irq_desc *desc;
140
141         desc = irq_to_desc(irq);
142         irq_desc_get_irq_data(desc)->chip = chip;
143         desc->handle_irq = handler;
144         desc->name = name;
145 }
146
147 static inline int irq_balancing_disabled(unsigned int irq)
148 {
149         struct irq_desc *desc;
150
151         desc = irq_to_desc(irq);
152         return desc->status_use_accessors & IRQ_NO_BALANCING_MASK;
153 }
154
155 static inline void
156 irq_set_lockdep_class(unsigned int irq, struct lock_class_key *class)
157 {
158         struct irq_desc *desc = irq_to_desc(irq);
159
160         if (desc)
161                 lockdep_set_class(&desc->lock, class);
162 }
163
164 #ifdef CONFIG_IRQ_PREFLOW_FASTEOI
165 static inline void
166 __irq_set_preflow_handler(unsigned int irq, irq_preflow_handler_t handler)
167 {
168         struct irq_desc *desc;
169
170         desc = irq_to_desc(irq);
171         desc->preflow_handler = handler;
172 }
173 #endif
174 #endif
175
176 #endif