| 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); |
| 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> |