1 /* SPDX-License-Identifier: GPL-2.0 */
2 #undef TRACE_SYSTEM
3 #define TRACE_SYSTEM irq
4
5 #if !defined(_TRACE_IRQ_H) || defined(TRACE_HEADER_MULTI_READ)
6 #define _TRACE_IRQ_H
7
8 #include <linux/tracepoint.h>
9
10 struct irqaction;
11 struct softirq_action;
12
13 #define SOFTIRQ_NAME_LIST \
14 softirq_name(HI) \
15 softirq_name(TIMER) \
16 softirq_name(NET_TX) \
17 softirq_name(NET_RX) \
18 softirq_name(BLOCK) \
19 softirq_name(IRQ_POLL) \
20 softirq_name(TASKLET) \
21 softirq_name(SCHED) \
22 softirq_name(HRTIMER) \
23 softirq_name_end(RCU)
24
25 #undef softirq_name
26 #undef softirq_name_end
27
28 #define softirq_name(sirq) TRACE_DEFINE_ENUM(sirq##_SOFTIRQ);
29 #define softirq_name_end(sirq) TRACE_DEFINE_ENUM(sirq##_SOFTIRQ);
30
31 SOFTIRQ_NAME_LIST
32
33 #undef softirq_name
34 #undef softirq_name_end
35
36 #define softirq_name(sirq) { sirq##_SOFTIRQ, #sirq },
37 #define softirq_name_end(sirq) { sirq##_SOFTIRQ, #sirq }
38
39 #define show_softirq_name(val) \
40 __print_symbolic(val, SOFTIRQ_NAME_LIST)
41
42 /**
43 * irq_handler_entry - called immediately before the irq action handler
44 * @irq: irq number
45 * @action: pointer to struct irqaction
46 *
47 * The struct irqaction pointed to by @action contains various
48 * information about the handler, including the device name,
49 * @action->name, and the device id, @action->dev_id. When used in
50 * conjunction with the irq_handler_exit tracepoint, we can figure
51 * out irq handler latencies.
52 */
53 TRACE_EVENT(irq_handler_entry,
54
55 TP_PROTO(int irq, struct irqaction *action),
56
57 TP_ARGS(irq, action),
58
59 TP_STRUCT__entry(
60 __field( int, irq )
61 __string( name, action->name )
62 ),
63
64 TP_fast_assign(
65 __entry->irq = irq;
66 __assign_str(name, action->name);
67 ),
68
69 TP_printk("irq=%d name=%s", __entry->irq, __get_str(name))
70 );
71
72 /**
73 * irq_handler_exit - called immediately after the irq action handler returns
74 * @irq: irq number
75 * @action: pointer to struct irqaction
76 * @ret: return value
77 *
78 * If the @ret value is set to IRQ_HANDLED, then we know that the corresponding
79 * @action->handler successfully handled this irq. Otherwise, the irq might be
80 * a shared irq line, or the irq was not handled successfully. Can be used in
81 * conjunction with the irq_handler_entry to understand irq handler latencies.
82 */
83 TRACE_EVENT(irq_handler_exit,
84
85 TP_PROTO(int irq, struct irqaction *action, int ret),
86
87 TP_ARGS(irq, action, ret),
88
89 TP_STRUCT__entry(
90 __field( int, irq )
91 __field( int, ret )
92 ),
93
94 TP_fast_assign(
95 __entry->irq = irq;
96 __entry->ret = ret;
97 ),
98
99 TP_printk("irq=%d ret=%s",
100 __entry->irq, __entry->ret ? "handled" : "unhandled")
101 );
102
103 DECLARE_EVENT_CLASS(softirq,
104
105 TP_PROTO(unsigned int vec_nr),
106
107 TP_ARGS(vec_nr),
108
109 TP_STRUCT__entry(
110 __field( unsigned int, vec )
111 ),
112
113 TP_fast_assign(
114 __entry->vec = vec_nr;
115 ),
116
117 TP_printk("vec=%u [action=%s]", __entry->vec,
118 show_softirq_name(__entry->vec))
119 );
120
121 /**
122 * softirq_entry - called immediately before the softirq handler
123 * @vec_nr: softirq vector number
124 *
125 * When used in combination with the softirq_exit tracepoint
126 * we can determine the softirq handler routine.
127 */
128 DEFINE_EVENT(softirq, softirq_entry,
129
130 TP_PROTO(unsigned int vec_nr),
131
132 TP_ARGS(vec_nr)
133 );
134
135 /**
136 * softirq_exit - called immediately after the softirq handler returns
137 * @vec_nr: softirq vector number
138 *
139 * When used in combination with the softirq_entry tracepoint
140 * we can determine the softirq handler routine.
141 */
142 DEFINE_EVENT(softirq, softirq_exit,
143
144 TP_PROTO(unsigned int vec_nr),
145
146 TP_ARGS(vec_nr)
147 );
148
149 /**
150 * softirq_raise - called immediately when a softirq is raised
151 * @vec_nr: softirq vector number
152 *
153 * When used in combination with the softirq_entry tracepoint
154 * we can determine the softirq raise to run latency.
155 */
156 DEFINE_EVENT(softirq, softirq_raise,
157
158 TP_PROTO(unsigned int vec_nr),
159
160 TP_ARGS(vec_nr)
161 );
162
163 #endif /* _TRACE_IRQ_H */
164
165 /* This part must be outside protection */
166 #include <trace/define_trace.h>