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 | DECLARE_EVENT_CLASS(tasklet, |
164 | |
165 | TP_PROTO(struct tasklet_struct *t, void *func), |
166 | |
167 | TP_ARGS(t, func), |
168 | |
169 | TP_STRUCT__entry( |
170 | __field( void *, tasklet) |
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" , __entry->tasklet, __entry->func) |
180 | ); |
181 | |
182 | /** |
183 | * tasklet_entry - called immediately before the tasklet is run |
184 | * @t: tasklet pointer |
185 | * @func: tasklet callback or function being run |
186 | * |
187 | * Used to find individual tasklet execution time |
188 | */ |
189 | DEFINE_EVENT(tasklet, tasklet_entry, |
190 | |
191 | TP_PROTO(struct tasklet_struct *t, void *func), |
192 | |
193 | TP_ARGS(t, func) |
194 | ); |
195 | |
196 | /** |
197 | * tasklet_exit - called immediately after the tasklet is run |
198 | * @t: tasklet pointer |
199 | * @func: tasklet callback or function being run |
200 | * |
201 | * Used to find individual tasklet execution time |
202 | */ |
203 | DEFINE_EVENT(tasklet, tasklet_exit, |
204 | |
205 | TP_PROTO(struct tasklet_struct *t, void *func), |
206 | |
207 | TP_ARGS(t, func) |
208 | ); |
209 | |
210 | #endif /* _TRACE_IRQ_H */ |
211 | |
212 | /* This part must be outside protection */ |
213 | #include <trace/define_trace.h> |
214 | |