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
9struct irqaction;
10struct softirq_action;
11
12#define SOFTIRQ_NAME_LIST				\
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(BLOCK_IOPOLL)	\
19			 softirq_name(TASKLET)		\
20			 softirq_name(SCHED)		\
21			 softirq_name(HRTIMER)		\
22			 softirq_name_end(RCU)
23
24#undef softirq_name
25#undef softirq_name_end
26
27#define softirq_name(sirq) TRACE_DEFINE_ENUM(sirq##_SOFTIRQ);
28#define softirq_name_end(sirq)  TRACE_DEFINE_ENUM(sirq##_SOFTIRQ);
29
30SOFTIRQ_NAME_LIST
31
32#undef softirq_name
33#undef softirq_name_end
34
35#define softirq_name(sirq) { sirq##_SOFTIRQ, #sirq },
36#define softirq_name_end(sirq) { sirq##_SOFTIRQ, #sirq }
37
38#define show_softirq_name(val)				\
39	__print_symbolic(val, SOFTIRQ_NAME_LIST)
40
41/**
42 * irq_handler_entry - called immediately before the irq action handler
43 * @irq: irq number
44 * @action: pointer to struct irqaction
45 *
46 * The struct irqaction pointed to by @action contains various
47 * information about the handler, including the device name,
48 * @action->name, and the device id, @action->dev_id. When used in
49 * conjunction with the irq_handler_exit tracepoint, we can figure
50 * out irq handler latencies.
51 */
52TRACE_EVENT(irq_handler_entry,
53
54	TP_PROTO(int irq, struct irqaction *action),
55
56	TP_ARGS(irq, action),
57
58	TP_STRUCT__entry(
59		__field(	int,	irq		)
60		__string(	name,	action->name	)
61	),
62
63	TP_fast_assign(
64		__entry->irq = irq;
65		__assign_str(name, action->name);
66	),
67
68	TP_printk("irq=%d name=%s", __entry->irq, __get_str(name))
69);
70
71/**
72 * irq_handler_exit - called immediately after the irq action handler returns
73 * @irq: irq number
74 * @action: pointer to struct irqaction
75 * @ret: return value
76 *
77 * If the @ret value is set to IRQ_HANDLED, then we know that the corresponding
78 * @action->handler scuccessully handled this irq. Otherwise, the irq might be
79 * a shared irq line, or the irq was not handled successfully. Can be used in
80 * conjunction with the irq_handler_entry to understand irq handler latencies.
81 */
82TRACE_EVENT(irq_handler_exit,
83
84	TP_PROTO(int irq, struct irqaction *action, int ret),
85
86	TP_ARGS(irq, action, ret),
87
88	TP_STRUCT__entry(
89		__field(	int,	irq	)
90		__field(	int,	ret	)
91	),
92
93	TP_fast_assign(
94		__entry->irq	= irq;
95		__entry->ret	= ret;
96	),
97
98	TP_printk("irq=%d ret=%s",
99		  __entry->irq, __entry->ret ? "handled" : "unhandled")
100);
101
102DECLARE_EVENT_CLASS(softirq,
103
104	TP_PROTO(unsigned int vec_nr),
105
106	TP_ARGS(vec_nr),
107
108	TP_STRUCT__entry(
109		__field(	unsigned int,	vec	)
110	),
111
112	TP_fast_assign(
113		__entry->vec = vec_nr;
114	),
115
116	TP_printk("vec=%u [action=%s]", __entry->vec,
117		  show_softirq_name(__entry->vec))
118);
119
120/**
121 * softirq_entry - called immediately before the softirq handler
122 * @vec_nr:  softirq vector number
123 *
124 * When used in combination with the softirq_exit tracepoint
125 * we can determine the softirq handler routine.
126 */
127DEFINE_EVENT(softirq, softirq_entry,
128
129	TP_PROTO(unsigned int vec_nr),
130
131	TP_ARGS(vec_nr)
132);
133
134/**
135 * softirq_exit - called immediately after the softirq handler returns
136 * @vec_nr:  softirq vector number
137 *
138 * When used in combination with the softirq_entry tracepoint
139 * we can determine the softirq handler routine.
140 */
141DEFINE_EVENT(softirq, softirq_exit,
142
143	TP_PROTO(unsigned int vec_nr),
144
145	TP_ARGS(vec_nr)
146);
147
148/**
149 * softirq_raise - called immediately when a softirq is raised
150 * @vec_nr:  softirq vector number
151 *
152 * When used in combination with the softirq_entry tracepoint
153 * we can determine the softirq raise to run latency.
154 */
155DEFINE_EVENT(softirq, softirq_raise,
156
157	TP_PROTO(unsigned int vec_nr),
158
159	TP_ARGS(vec_nr)
160);
161
162#endif /*  _TRACE_IRQ_H */
163
164/* This part must be outside protection */
165#include <trace/define_trace.h>
166