1 /* SPDX-License-Identifier: GPL-2.0 */ 1 /* SPDX-License-Identifier: GPL-2.0 */
2 #undef TRACE_SYSTEM 2 #undef TRACE_SYSTEM
3 #define TRACE_SYSTEM irq 3 #define TRACE_SYSTEM irq
4 4
5 #if !defined(_TRACE_IRQ_H) || defined(TRACE_HE 5 #if !defined(_TRACE_IRQ_H) || defined(TRACE_HEADER_MULTI_READ)
6 #define _TRACE_IRQ_H 6 #define _TRACE_IRQ_H
7 7
8 #include <linux/tracepoint.h> 8 #include <linux/tracepoint.h>
9 9
10 struct irqaction; 10 struct irqaction;
11 struct softirq_action; 11 struct softirq_action;
12 12
13 #define SOFTIRQ_NAME_LIST 13 #define SOFTIRQ_NAME_LIST \
14 softirq_name(HI) 14 softirq_name(HI) \
15 softirq_name(TIMER) 15 softirq_name(TIMER) \
16 softirq_name(NET_TX) 16 softirq_name(NET_TX) \
17 softirq_name(NET_RX) 17 softirq_name(NET_RX) \
18 softirq_name(BLOCK) 18 softirq_name(BLOCK) \
19 softirq_name(IRQ_POLL 19 softirq_name(IRQ_POLL) \
20 softirq_name(TASKLET) 20 softirq_name(TASKLET) \
21 softirq_name(SCHED) 21 softirq_name(SCHED) \
22 softirq_name(HRTIMER) 22 softirq_name(HRTIMER) \
23 softirq_name_end(RCU) 23 softirq_name_end(RCU)
24 24
25 #undef softirq_name 25 #undef softirq_name
26 #undef softirq_name_end 26 #undef softirq_name_end
27 27
28 #define softirq_name(sirq) TRACE_DEFINE_ENUM(s 28 #define softirq_name(sirq) TRACE_DEFINE_ENUM(sirq##_SOFTIRQ);
29 #define softirq_name_end(sirq) TRACE_DEFINE_E 29 #define softirq_name_end(sirq) TRACE_DEFINE_ENUM(sirq##_SOFTIRQ);
30 30
31 SOFTIRQ_NAME_LIST 31 SOFTIRQ_NAME_LIST
32 32
33 #undef softirq_name 33 #undef softirq_name
34 #undef softirq_name_end 34 #undef softirq_name_end
35 35
36 #define softirq_name(sirq) { sirq##_SOFTIRQ, # 36 #define softirq_name(sirq) { sirq##_SOFTIRQ, #sirq },
37 #define softirq_name_end(sirq) { sirq##_SOFTIR 37 #define softirq_name_end(sirq) { sirq##_SOFTIRQ, #sirq }
38 38
39 #define show_softirq_name(val) 39 #define show_softirq_name(val) \
40 __print_symbolic(val, SOFTIRQ_NAME_LIS 40 __print_symbolic(val, SOFTIRQ_NAME_LIST)
41 41
42 /** 42 /**
43 * irq_handler_entry - called immediately befo 43 * irq_handler_entry - called immediately before the irq action handler
44 * @irq: irq number 44 * @irq: irq number
45 * @action: pointer to struct irqaction 45 * @action: pointer to struct irqaction
46 * 46 *
47 * The struct irqaction pointed to by @action 47 * The struct irqaction pointed to by @action contains various
48 * information about the handler, including th 48 * information about the handler, including the device name,
49 * @action->name, and the device id, @action-> 49 * @action->name, and the device id, @action->dev_id. When used in
50 * conjunction with the irq_handler_exit trace 50 * conjunction with the irq_handler_exit tracepoint, we can figure
51 * out irq handler latencies. 51 * out irq handler latencies.
52 */ 52 */
53 TRACE_EVENT(irq_handler_entry, 53 TRACE_EVENT(irq_handler_entry,
54 54
55 TP_PROTO(int irq, struct irqaction *ac 55 TP_PROTO(int irq, struct irqaction *action),
56 56
57 TP_ARGS(irq, action), 57 TP_ARGS(irq, action),
58 58
59 TP_STRUCT__entry( 59 TP_STRUCT__entry(
60 __field( int, irq 60 __field( int, irq )
61 __string( name, action 61 __string( name, action->name )
62 ), 62 ),
63 63
64 TP_fast_assign( 64 TP_fast_assign(
65 __entry->irq = irq; 65 __entry->irq = irq;
66 __assign_str(name); !! 66 __assign_str(name, action->name);
67 ), 67 ),
68 68
69 TP_printk("irq=%d name=%s", __entry->i 69 TP_printk("irq=%d name=%s", __entry->irq, __get_str(name))
70 ); 70 );
71 71
72 /** 72 /**
73 * irq_handler_exit - called immediately after 73 * irq_handler_exit - called immediately after the irq action handler returns
74 * @irq: irq number 74 * @irq: irq number
75 * @action: pointer to struct irqaction 75 * @action: pointer to struct irqaction
76 * @ret: return value 76 * @ret: return value
77 * 77 *
78 * If the @ret value is set to IRQ_HANDLED, th 78 * If the @ret value is set to IRQ_HANDLED, then we know that the corresponding
79 * @action->handler successfully handled this 79 * @action->handler successfully handled this irq. Otherwise, the irq might be
80 * a shared irq line, or the irq was not handl 80 * a shared irq line, or the irq was not handled successfully. Can be used in
81 * conjunction with the irq_handler_entry to u 81 * conjunction with the irq_handler_entry to understand irq handler latencies.
82 */ 82 */
83 TRACE_EVENT(irq_handler_exit, 83 TRACE_EVENT(irq_handler_exit,
84 84
85 TP_PROTO(int irq, struct irqaction *ac 85 TP_PROTO(int irq, struct irqaction *action, int ret),
86 86
87 TP_ARGS(irq, action, ret), 87 TP_ARGS(irq, action, ret),
88 88
89 TP_STRUCT__entry( 89 TP_STRUCT__entry(
90 __field( int, irq 90 __field( int, irq )
91 __field( int, ret 91 __field( int, ret )
92 ), 92 ),
93 93
94 TP_fast_assign( 94 TP_fast_assign(
95 __entry->irq = irq; 95 __entry->irq = irq;
96 __entry->ret = ret; 96 __entry->ret = ret;
97 ), 97 ),
98 98
99 TP_printk("irq=%d ret=%s", 99 TP_printk("irq=%d ret=%s",
100 __entry->irq, __entry->ret ? 100 __entry->irq, __entry->ret ? "handled" : "unhandled")
101 ); 101 );
102 102
103 DECLARE_EVENT_CLASS(softirq, 103 DECLARE_EVENT_CLASS(softirq,
104 104
105 TP_PROTO(unsigned int vec_nr), 105 TP_PROTO(unsigned int vec_nr),
106 106
107 TP_ARGS(vec_nr), 107 TP_ARGS(vec_nr),
108 108
109 TP_STRUCT__entry( 109 TP_STRUCT__entry(
110 __field( unsigned int, 110 __field( unsigned int, vec )
111 ), 111 ),
112 112
113 TP_fast_assign( 113 TP_fast_assign(
114 __entry->vec = vec_nr; 114 __entry->vec = vec_nr;
115 ), 115 ),
116 116
117 TP_printk("vec=%u [action=%s]", __entr 117 TP_printk("vec=%u [action=%s]", __entry->vec,
118 show_softirq_name(__entry->v 118 show_softirq_name(__entry->vec))
119 ); 119 );
120 120
121 /** 121 /**
122 * softirq_entry - called immediately before t 122 * softirq_entry - called immediately before the softirq handler
123 * @vec_nr: softirq vector number 123 * @vec_nr: softirq vector number
124 * 124 *
125 * When used in combination with the softirq_e 125 * When used in combination with the softirq_exit tracepoint
126 * we can determine the softirq handler routin 126 * we can determine the softirq handler routine.
127 */ 127 */
128 DEFINE_EVENT(softirq, softirq_entry, 128 DEFINE_EVENT(softirq, softirq_entry,
129 129
130 TP_PROTO(unsigned int vec_nr), 130 TP_PROTO(unsigned int vec_nr),
131 131
132 TP_ARGS(vec_nr) 132 TP_ARGS(vec_nr)
133 ); 133 );
134 134
135 /** 135 /**
136 * softirq_exit - called immediately after the 136 * softirq_exit - called immediately after the softirq handler returns
137 * @vec_nr: softirq vector number 137 * @vec_nr: softirq vector number
138 * 138 *
139 * When used in combination with the softirq_e 139 * When used in combination with the softirq_entry tracepoint
140 * we can determine the softirq handler routin 140 * we can determine the softirq handler routine.
141 */ 141 */
142 DEFINE_EVENT(softirq, softirq_exit, 142 DEFINE_EVENT(softirq, softirq_exit,
143 143
144 TP_PROTO(unsigned int vec_nr), 144 TP_PROTO(unsigned int vec_nr),
145 145
146 TP_ARGS(vec_nr) 146 TP_ARGS(vec_nr)
147 ); 147 );
148 148
149 /** 149 /**
150 * softirq_raise - called immediately when a s 150 * softirq_raise - called immediately when a softirq is raised
151 * @vec_nr: softirq vector number 151 * @vec_nr: softirq vector number
152 * 152 *
153 * When used in combination with the softirq_e 153 * When used in combination with the softirq_entry tracepoint
154 * we can determine the softirq raise to run l 154 * we can determine the softirq raise to run latency.
155 */ 155 */
156 DEFINE_EVENT(softirq, softirq_raise, 156 DEFINE_EVENT(softirq, softirq_raise,
157 157
158 TP_PROTO(unsigned int vec_nr), 158 TP_PROTO(unsigned int vec_nr),
159 159
160 TP_ARGS(vec_nr) 160 TP_ARGS(vec_nr)
161 ); <<
162 <<
163 DECLARE_EVENT_CLASS(tasklet, <<
164 <<
165 TP_PROTO(struct tasklet_struct *t, voi <<
166 <<
167 TP_ARGS(t, func), <<
168 <<
169 TP_STRUCT__entry( <<
170 __field( void *, taskle <<
171 __field( void *, func) <<
172 ), <<
173 <<
174 TP_fast_assign( <<
175 __entry->tasklet = t; <<
176 __entry->func = func; <<
177 ), <<
178 <<
179 TP_printk("tasklet=%ps function=%ps", <<
180 ); <<
181 <<
182 /** <<
183 * tasklet_entry - called immediately before t <<
184 * @t: tasklet pointer <<
185 * @func: tasklet callback or function being r <<
186 * <<
187 * Used to find individual tasklet execution t <<
188 */ <<
189 DEFINE_EVENT(tasklet, tasklet_entry, <<
190 <<
191 TP_PROTO(struct tasklet_struct *t, voi <<
192 <<
193 TP_ARGS(t, func) <<
194 ); <<
195 <<
196 /** <<
197 * tasklet_exit - called immediately after the <<
198 * @t: tasklet pointer <<
199 * @func: tasklet callback or function being r <<
200 * <<
201 * Used to find individual tasklet execution t <<
202 */ <<
203 DEFINE_EVENT(tasklet, tasklet_exit, <<
204 <<
205 TP_PROTO(struct tasklet_struct *t, voi <<
206 <<
207 TP_ARGS(t, func) <<
208 ); 161 );
209 162
210 #endif /* _TRACE_IRQ_H */ 163 #endif /* _TRACE_IRQ_H */
211 164
212 /* This part must be outside protection */ 165 /* This part must be outside protection */
213 #include <trace/define_trace.h> 166 #include <trace/define_trace.h>
214 167
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