1 #ifndef _LINUX_IRQDESC_H
2 #define _LINUX_IRQDESC_H
5 * Core internal functions to deal with irq descriptors
7 * This include will move to kernel/irq once we cleaned up the tree.
8 * For now it's included from <linux/irq.h>
11 struct irq_affinity_notify
;
12 struct proc_dir_entry
;
13 struct timer_rand_state
;
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 [if NULL, __do_IRQ()]
20 * @action: the irq action chain
21 * @status: status information
22 * @core_internal_state__do_not_mess_with_it: core internal status information
23 * @depth: disable-depth, for nested irq_disable() calls
24 * @wake_depth: enable depth, for multiple set_irq_wake() callers
25 * @irq_count: stats field to detect stalled irqs
26 * @last_unhandled: aging timer for unhandled count
27 * @irqs_unhandled: stats field for spurious unhandled interrupts
28 * @lock: locking for SMP
29 * @affinity_notify: context for notification of affinity changes
30 * @pending_mask: pending rebalanced interrupts
31 * @threads_oneshot: bitfield to handle shared oneshot threads
32 * @threads_active: number of irqaction threads currently running
33 * @wait_for_threads: wait queue for sync_irq to wait for threaded handlers
34 * @dir: /proc/irq/ procfs entry
35 * @name: flow handler name for /proc/interrupts output
39 #ifdef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED
40 struct irq_data irq_data
;
43 * This union will go away, once we fixed the direct access to
44 * irq_desc all over the place. The direct fields are a 1:1
45 * overlay of irq_data.
48 struct irq_data irq_data
;
52 unsigned int pad_do_not_even_think_about_it
;
53 struct irq_chip
*chip
;
56 struct msi_desc
*msi_desc
;
58 cpumask_var_t affinity
;
64 struct timer_rand_state
*timer_rand_state
;
65 unsigned int __percpu
*kstat_irqs
;
66 irq_flow_handler_t handle_irq
;
67 #ifdef CONFIG_IRQ_PREFLOW_FASTEOI
68 irq_preflow_handler_t preflow_handler
;
70 struct irqaction
*action
; /* IRQ action list */
71 #ifdef CONFIG_GENERIC_HARDIRQS_NO_COMPAT
72 unsigned int status_use_accessors
;
74 unsigned int status
; /* IRQ status */
76 unsigned int core_internal_state__do_not_mess_with_it
;
77 unsigned int depth
; /* nested irq disables */
78 unsigned int wake_depth
; /* nested wake enables */
79 unsigned int irq_count
; /* For detecting broken IRQs */
80 unsigned long last_unhandled
; /* Aging timer for unhandled count */
81 unsigned int irqs_unhandled
;
84 const struct cpumask
*affinity_hint
;
85 struct irq_affinity_notify
*affinity_notify
;
86 #ifdef CONFIG_GENERIC_PENDING_IRQ
87 cpumask_var_t pending_mask
;
90 unsigned long threads_oneshot
;
91 atomic_t threads_active
;
92 wait_queue_head_t wait_for_threads
;
94 struct proc_dir_entry
*dir
;
97 } ____cacheline_internodealigned_in_smp
;
99 #ifndef CONFIG_SPARSE_IRQ
100 extern struct irq_desc irq_desc
[NR_IRQS
];
103 /* Will be removed once the last users in power and sh are gone */
104 extern struct irq_desc
*irq_to_desc_alloc_node(unsigned int irq
, int node
);
105 static inline struct irq_desc
*move_irq_desc(struct irq_desc
*desc
, int node
)
110 #ifdef CONFIG_GENERIC_HARDIRQS
112 static inline struct irq_data
*irq_desc_get_irq_data(struct irq_desc
*desc
)
114 return &desc
->irq_data
;
117 static inline struct irq_chip
*irq_desc_get_chip(struct irq_desc
*desc
)
119 return desc
->irq_data
.chip
;
122 static inline void *irq_desc_get_chip_data(struct irq_desc
*desc
)
124 return desc
->irq_data
.chip_data
;
127 static inline void *irq_desc_get_handler_data(struct irq_desc
*desc
)
129 return desc
->irq_data
.handler_data
;
132 static inline struct msi_desc
*irq_desc_get_msi_desc(struct irq_desc
*desc
)
134 return desc
->irq_data
.msi_desc
;
137 #ifndef CONFIG_GENERIC_HARDIRQS_NO_COMPAT
138 static inline struct irq_chip
*get_irq_desc_chip(struct irq_desc
*desc
)
140 return irq_desc_get_chip(desc
);
142 static inline void *get_irq_desc_data(struct irq_desc
*desc
)
144 return irq_desc_get_handler_data(desc
);
147 static inline void *get_irq_desc_chip_data(struct irq_desc
*desc
)
149 return irq_desc_get_chip_data(desc
);
152 static inline struct msi_desc
*get_irq_desc_msi(struct irq_desc
*desc
)
154 return irq_desc_get_msi_desc(desc
);
159 * Architectures call this to let the generic IRQ layer
160 * handle an interrupt. If the descriptor is attached to an
161 * irqchip-style controller then we call the ->handle_irq() handler,
162 * and it calls __do_IRQ() if it's attached to an irqtype-style controller.
164 static inline void generic_handle_irq_desc(unsigned int irq
, struct irq_desc
*desc
)
166 desc
->handle_irq(irq
, desc
);
169 static inline void generic_handle_irq(unsigned int irq
)
171 generic_handle_irq_desc(irq
, irq_to_desc(irq
));
174 /* Test to see if a driver has successfully requested an irq */
175 static inline int irq_has_action(unsigned int irq
)
177 struct irq_desc
*desc
= irq_to_desc(irq
);
178 return desc
->action
!= NULL
;
181 #ifndef CONFIG_GENERIC_HARDIRQS_NO_COMPAT
182 static inline int irq_balancing_disabled(unsigned int irq
)
184 struct irq_desc
*desc
;
186 desc
= irq_to_desc(irq
);
187 return desc
->status
& IRQ_NO_BALANCING_MASK
;
191 /* caller has locked the irq_desc and both params are valid */
192 static inline void __set_irq_handler_unlocked(int irq
,
193 irq_flow_handler_t handler
)
195 struct irq_desc
*desc
;
197 desc
= irq_to_desc(irq
);
198 desc
->handle_irq
= handler
;
201 #ifdef CONFIG_IRQ_PREFLOW_FASTEOI
203 __irq_set_preflow_handler(unsigned int irq
, irq_preflow_handler_t handler
)
205 struct irq_desc
*desc
;
207 desc
= irq_to_desc(irq
);
208 desc
->preflow_handler
= handler
;