1 #undef TRACE_SYSTEM
2 #define TRACE_SYSTEM irq
3
4 #if !defined(_TRACE_IRQ_H) || defined(TRACE_HEADER_MULTI_READ)
5 #define _TRACE_IRQ_H
6
7 #include <linux/tracepoint.h>
8 #include <linux/interrupt.h>
9
10 #define softirq_name(sirq) { sirq##_SOFTIRQ, #sirq }
11 #define show_softirq_name(val) \
12 __print_symbolic(val, \
13 softirq_name(HI), \
14 softirq_name(TIMER), \
15 softirq_name(NET_TX), \
16 softirq_name(NET_RX), \
17 softirq_name(BLOCK), \
18 softirq_name(TASKLET), \
19 softirq_name(SCHED), \
20 softirq_name(HRTIMER), \
21 softirq_name(RCU))
22
23 /**
24 * irq_handler_entry - called immediately before the irq action handler
25 * @irq: irq number
26 * @action: pointer to struct irqaction
27 *
28 * The struct irqaction pointed to by @action contains various
29 * information about the handler, including the device name,
30 * @action->name, and the device id, @action->dev_id. When used in
31 * conjunction with the irq_handler_exit tracepoint, we can figure
32 * out irq handler latencies.
33 */
34 TRACE_EVENT(irq_handler_entry,
35
36 TP_PROTO(int irq, struct irqaction *action),
37
38 TP_ARGS(irq, action),
39
40 TP_STRUCT__entry(
41 __field( int, irq )
42 __string( name, action->name )
43 ),
44
45 TP_fast_assign(
46 __entry->irq = irq;
47 __assign_str(name, action->name);
48 ),
49
50 TP_printk("irq=%d handler=%s", __entry->irq, __get_str(name))
51 );
52
53 /**
54 * irq_handler_exit - called immediately after the irq action handler returns
55 * @irq: irq number
56 * @action: pointer to struct irqaction
57 * @ret: return value
58 *
59 * If the @ret value is set to IRQ_HANDLED, then we know that the corresponding
60 * @action->handler scuccessully handled this irq. Otherwise, the irq might be
61 * a shared irq line, or the irq was not handled successfully. Can be used in
62 * conjunction with the irq_handler_entry to understand irq handler latencies.
63 */
64 TRACE_EVENT(irq_handler_exit,
65
66 TP_PROTO(int irq, struct irqaction *action, int ret),
67
68 TP_ARGS(irq, action, ret),
69
70 TP_STRUCT__entry(
71 __field( int, irq )
72 __field( int, ret )
73 ),
74
75 TP_fast_assign(
76 __entry->irq = irq;
77 __entry->ret = ret;
78 ),
79
80 TP_printk("irq=%d return=%s",
81 __entry->irq, __entry->ret ? "handled" : "unhandled")
82 );
83
84 /**
85 * softirq_entry - called immediately before the softirq handler
86 * @h: pointer to struct softirq_action
87 * @vec: pointer to first struct softirq_action in softirq_vec array
88 *
89 * The @h parameter, contains a pointer to the struct softirq_action
90 * which has a pointer to the action handler that is called. By subtracting
91 * the @vec pointer from the @h pointer, we can determine the softirq
92 * number. Also, when used in combination with the softirq_exit tracepoint
93 * we can determine the softirq latency.
94 */
95 TRACE_EVENT(softirq_entry,
96
97 TP_PROTO(struct softirq_action *h, struct softirq_action *vec),
98
99 TP_ARGS(h, vec),
100
101 TP_STRUCT__entry(
102 __field( int, vec )
103 ),
104
105 TP_fast_assign(
106 __entry->vec = (int)(h - vec);
107 ),
108
109 TP_printk("softirq=%d action=%s", __entry->vec,
110 show_softirq_name(__entry->vec))
111 );
112
113 /**
114 * softirq_exit - called immediately after the softirq handler returns
115 * @h: pointer to struct softirq_action
116 * @vec: pointer to first struct softirq_action in softirq_vec array
117 *
118 * The @h parameter contains a pointer to the struct softirq_action
119 * that has handled the softirq. By subtracting the @vec pointer from
120 * the @h pointer, we can determine the softirq number. Also, when used in
121 * combination with the softirq_entry tracepoint we can determine the softirq
122 * latency.
123 */
124 TRACE_EVENT(softirq_exit,
125
126 TP_PROTO(struct softirq_action *h, struct softirq_action *vec),
127
128 TP_ARGS(h, vec),
129
130 TP_STRUCT__entry(
131 __field( int, vec )
132 ),
133
134 TP_fast_assign(
135 __entry->vec = (int)(h - vec);
136 ),
137
138 TP_printk("softirq=%d action=%s", __entry->vec,
139 show_softirq_name(__entry->vec))
140 );
141
142 #endif /* _TRACE_IRQ_H */
143
144 /* This part must be outside protection */
145 #include <trace/define_trace.h>
146
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