Commit | Line | Data |
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ea20d929 | 1 | #if !defined(_TRACE_IRQ_H) || defined(TRACE_HEADER_MULTI_READ) |
af39241b JB |
2 | #define _TRACE_IRQ_H |
3 | ||
af39241b | 4 | #include <linux/tracepoint.h> |
ea20d929 SR |
5 | #include <linux/interrupt.h> |
6 | ||
7 | #undef TRACE_SYSTEM | |
8 | #define TRACE_SYSTEM irq | |
9 | ||
9ee1983c JB |
10 | /** |
11 | * irq_handler_entry - called immediately before the irq action handler | |
12 | * @irq: irq number | |
13 | * @action: pointer to struct irqaction | |
14 | * | |
15 | * The struct irqaction pointed to by @action contains various | |
16 | * information about the handler, including the device name, | |
17 | * @action->name, and the device id, @action->dev_id. When used in | |
18 | * conjunction with the irq_handler_exit tracepoint, we can figure | |
19 | * out irq handler latencies. | |
ea20d929 | 20 | */ |
160031b5 SR |
21 | TRACE_EVENT(irq_handler_entry, |
22 | ||
ea20d929 | 23 | TP_PROTO(int irq, struct irqaction *action), |
160031b5 | 24 | |
ea20d929 | 25 | TP_ARGS(irq, action), |
160031b5 SR |
26 | |
27 | TP_STRUCT__entry( | |
28 | __field( int, irq ) | |
29 | __string( name, action->name ) | |
30 | ), | |
31 | ||
32 | TP_fast_assign( | |
33 | __entry->irq = irq; | |
34 | __assign_str(name, action->name); | |
35 | ), | |
36 | ||
37 | TP_printk("irq=%d handler=%s", __entry->irq, __get_str(name)) | |
38 | ); | |
ea20d929 | 39 | |
9ee1983c JB |
40 | /** |
41 | * irq_handler_exit - called immediately after the irq action handler returns | |
42 | * @irq: irq number | |
43 | * @action: pointer to struct irqaction | |
44 | * @ret: return value | |
45 | * | |
46 | * If the @ret value is set to IRQ_HANDLED, then we know that the corresponding | |
47 | * @action->handler scuccessully handled this irq. Otherwise, the irq might be | |
48 | * a shared irq line, or the irq was not handled successfully. Can be used in | |
49 | * conjunction with the irq_handler_entry to understand irq handler latencies. | |
ea20d929 SR |
50 | */ |
51 | TRACE_EVENT(irq_handler_exit, | |
52 | ||
53 | TP_PROTO(int irq, struct irqaction *action, int ret), | |
54 | ||
55 | TP_ARGS(irq, action, ret), | |
56 | ||
57 | TP_STRUCT__entry( | |
58 | __field( int, irq ) | |
59 | __field( int, ret ) | |
60 | ), | |
61 | ||
62 | TP_fast_assign( | |
63 | __entry->irq = irq; | |
64 | __entry->ret = ret; | |
65 | ), | |
66 | ||
67 | TP_printk("irq=%d return=%s", | |
68 | __entry->irq, __entry->ret ? "handled" : "unhandled") | |
69 | ); | |
70 | ||
9ee1983c JB |
71 | /** |
72 | * softirq_entry - called immediately before the softirq handler | |
73 | * @h: pointer to struct softirq_action | |
74 | * @vec: pointer to first struct softirq_action in softirq_vec array | |
75 | * | |
76 | * The @h parameter, contains a pointer to the struct softirq_action | |
77 | * which has a pointer to the action handler that is called. By subtracting | |
78 | * the @vec pointer from the @h pointer, we can determine the softirq | |
79 | * number. Also, when used in combination with the softirq_exit tracepoint | |
80 | * we can determine the softirq latency. | |
81 | */ | |
160031b5 SR |
82 | TRACE_EVENT(softirq_entry, |
83 | ||
ea20d929 | 84 | TP_PROTO(struct softirq_action *h, struct softirq_action *vec), |
160031b5 | 85 | |
ea20d929 | 86 | TP_ARGS(h, vec), |
af39241b | 87 | |
160031b5 SR |
88 | TP_STRUCT__entry( |
89 | __field( int, vec ) | |
90 | __string( name, softirq_to_name[h-vec] ) | |
91 | ), | |
92 | ||
93 | TP_fast_assign( | |
94 | __entry->vec = (int)(h - vec); | |
95 | __assign_str(name, softirq_to_name[h-vec]); | |
96 | ), | |
97 | ||
98 | TP_printk("softirq=%d action=%s", __entry->vec, __get_str(name)) | |
99 | ); | |
100 | ||
9ee1983c JB |
101 | /** |
102 | * softirq_exit - called immediately after the softirq handler returns | |
103 | * @h: pointer to struct softirq_action | |
104 | * @vec: pointer to first struct softirq_action in softirq_vec array | |
105 | * | |
106 | * The @h parameter contains a pointer to the struct softirq_action | |
107 | * that has handled the softirq. By subtracting the @vec pointer from | |
108 | * the @h pointer, we can determine the softirq number. Also, when used in | |
109 | * combination with the softirq_entry tracepoint we can determine the softirq | |
110 | * latency. | |
111 | */ | |
160031b5 SR |
112 | TRACE_EVENT(softirq_exit, |
113 | ||
ea20d929 | 114 | TP_PROTO(struct softirq_action *h, struct softirq_action *vec), |
160031b5 | 115 | |
ea20d929 | 116 | TP_ARGS(h, vec), |
160031b5 SR |
117 | |
118 | TP_STRUCT__entry( | |
119 | __field( int, vec ) | |
120 | __string( name, softirq_to_name[h-vec] ) | |
121 | ), | |
122 | ||
123 | TP_fast_assign( | |
124 | __entry->vec = (int)(h - vec); | |
125 | __assign_str(name, softirq_to_name[h-vec]); | |
126 | ), | |
127 | ||
128 | TP_printk("softirq=%d action=%s", __entry->vec, __get_str(name)) | |
129 | ); | |
af39241b | 130 | |
a8d154b0 SR |
131 | #endif /* _TRACE_IRQ_H */ |
132 | ||
133 | /* This part must be outside protection */ | |
134 | #include <trace/define_trace.h> |