1STRUCT IRQ_DESC(9)                Structures                STRUCT IRQ_DESC(9)
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NAME

6       struct_irq_desc - interrupt descriptor
7

SYNOPSIS

9       struct irq_desc {
10         unsigned int irq;
11         struct timer_rand_state * timer_rand_state;
12         unsigned int * kstat_irqs;
13       #ifdef CONFIG_INTR_REMAP
14         struct irq_2_iommu * irq_2_iommu;
15       #endif
16         irq_flow_handler_t handle_irq;
17         struct irq_chip * chip;
18         struct msi_desc * msi_desc;
19         void * handler_data;
20         void * chip_data;
21         struct irqaction * action;
22         unsigned int status;
23         unsigned int depth;
24         unsigned int wake_depth;
25         unsigned int irq_count;
26         unsigned long last_unhandled;
27         unsigned int irqs_unhandled;
28         raw_spinlock_t lock;
29       #ifdef CONFIG_SMP
30         cpumask_var_t affinity;
31         unsigned int node;
32       #ifdef CONFIG_GENERIC_PENDING_IRQ
33         cpumask_var_t pending_mask;
34       #endif
35       #endif
36         atomic_t threads_active;
37         wait_queue_head_t wait_for_threads;
38       #ifdef CONFIG_PROC_FS
39         struct proc_dir_entry * dir;
40       #endif
41         const char * name;
42       };
43

MEMBERS

45       irq
46           interrupt number for this descriptor
47
48       timer_rand_state
49           pointer to timer rand state struct
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51       kstat_irqs
52           irq stats per cpu
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54       irq_2_iommu
55           iommu with this irq
56
57       handle_irq
58           highlevel irq-events handler [if NULL, __do_IRQ]
59
60       chip
61           low level interrupt hardware access
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63       msi_desc
64           MSI descriptor
65
66       handler_data
67           per-IRQ data for the irq_chip methods
68
69       chip_data
70           platform-specific per-chip private data for the chip methods, to
71           allow shared chip implementations
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73       action
74           the irq action chain
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76       status
77           status information
78
79       depth
80           disable-depth, for nested irq_disable calls
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82       wake_depth
83           enable depth, for multiple set_irq_wake callers
84
85       irq_count
86           stats field to detect stalled irqs
87
88       last_unhandled
89           aging timer for unhandled count
90
91       irqs_unhandled
92           stats field for spurious unhandled interrupts
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94       lock
95           locking for SMP
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97       affinity
98           IRQ affinity on SMP
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100       node
101           node index useful for balancing
102
103       pending_mask
104           pending rebalanced interrupts
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106       threads_active
107           number of irqaction threads currently running
108
109       wait_for_threads
110           wait queue for sync_irq to wait for threaded handlers
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112       dir
113           /proc/irq/ procfs entry
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115       name
116           flow handler name for /proc/interrupts output
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AUTHORS

119       Thomas Gleixner <tglx@linutronix.de>
120           Author.
121
122       Ingo Molnar <mingo@elte.hu>
123           Author.
124

126Kernel Hackers Manual 2.6.       November 2011              STRUCT IRQ_DESC(9)
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