1 /* I2C message transfer tracepoints 2 * 3 * Copyright (C) 2013 Red Hat, Inc. All Rights Reserved. 4 * Written by David Howells (dhowells@redhat.com) 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public Licence 8 * as published by the Free Software Foundation; either version 9 * 2 of the Licence, or (at your option) any later version. 10 */ 11 #undef TRACE_SYSTEM 12 #define TRACE_SYSTEM i2c 13 14 #if !defined(_TRACE_I2C_H) || defined(TRACE_HEADER_MULTI_READ) 15 #define _TRACE_I2C_H 16 17 #include <linux/i2c.h> 18 #include <linux/tracepoint.h> 19 20 /* 21 * drivers/i2c/i2c-core-base.c 22 */ 23 extern int i2c_transfer_trace_reg(void); 24 extern void i2c_transfer_trace_unreg(void); 25 26 /* 27 * __i2c_transfer() write request 28 */ 29 TRACE_EVENT_FN(i2c_write, 30 TP_PROTO(const struct i2c_adapter *adap, const struct i2c_msg *msg, 31 int num), 32 TP_ARGS(adap, msg, num), 33 TP_STRUCT__entry( 34 __field(int, adapter_nr ) 35 __field(__u16, msg_nr ) 36 __field(__u16, addr ) 37 __field(__u16, flags ) 38 __field(__u16, len ) 39 __dynamic_array(__u8, buf, msg->len) ), 40 TP_fast_assign( 41 __entry->adapter_nr = adap->nr; 42 __entry->msg_nr = num; 43 __entry->addr = msg->addr; 44 __entry->flags = msg->flags; 45 __entry->len = msg->len; 46 memcpy(__get_dynamic_array(buf), msg->buf, msg->len); 47 ), 48 TP_printk("i2c-%d #%u a=%03x f=%04x l=%u [%*phD]", 49 __entry->adapter_nr, 50 __entry->msg_nr, 51 __entry->addr, 52 __entry->flags, 53 __entry->len, 54 __entry->len, __get_dynamic_array(buf) 55 ), 56 i2c_transfer_trace_reg, 57 i2c_transfer_trace_unreg); 58 59 /* 60 * __i2c_transfer() read request 61 */ 62 TRACE_EVENT_FN(i2c_read, 63 TP_PROTO(const struct i2c_adapter *adap, const struct i2c_msg *msg, 64 int num), 65 TP_ARGS(adap, msg, num), 66 TP_STRUCT__entry( 67 __field(int, adapter_nr ) 68 __field(__u16, msg_nr ) 69 __field(__u16, addr ) 70 __field(__u16, flags ) 71 __field(__u16, len ) 72 ), 73 TP_fast_assign( 74 __entry->adapter_nr = adap->nr; 75 __entry->msg_nr = num; 76 __entry->addr = msg->addr; 77 __entry->flags = msg->flags; 78 __entry->len = msg->len; 79 ), 80 TP_printk("i2c-%d #%u a=%03x f=%04x l=%u", 81 __entry->adapter_nr, 82 __entry->msg_nr, 83 __entry->addr, 84 __entry->flags, 85 __entry->len 86 ), 87 i2c_transfer_trace_reg, 88 i2c_transfer_trace_unreg); 89 90 /* 91 * __i2c_transfer() read reply 92 */ 93 TRACE_EVENT_FN(i2c_reply, 94 TP_PROTO(const struct i2c_adapter *adap, const struct i2c_msg *msg, 95 int num), 96 TP_ARGS(adap, msg, num), 97 TP_STRUCT__entry( 98 __field(int, adapter_nr ) 99 __field(__u16, msg_nr ) 100 __field(__u16, addr ) 101 __field(__u16, flags ) 102 __field(__u16, len ) 103 __dynamic_array(__u8, buf, msg->len) ), 104 TP_fast_assign( 105 __entry->adapter_nr = adap->nr; 106 __entry->msg_nr = num; 107 __entry->addr = msg->addr; 108 __entry->flags = msg->flags; 109 __entry->len = msg->len; 110 memcpy(__get_dynamic_array(buf), msg->buf, msg->len); 111 ), 112 TP_printk("i2c-%d #%u a=%03x f=%04x l=%u [%*phD]", 113 __entry->adapter_nr, 114 __entry->msg_nr, 115 __entry->addr, 116 __entry->flags, 117 __entry->len, 118 __entry->len, __get_dynamic_array(buf) 119 ), 120 i2c_transfer_trace_reg, 121 i2c_transfer_trace_unreg); 122 123 /* 124 * __i2c_transfer() result 125 */ 126 TRACE_EVENT_FN(i2c_result, 127 TP_PROTO(const struct i2c_adapter *adap, int num, int ret), 128 TP_ARGS(adap, num, ret), 129 TP_STRUCT__entry( 130 __field(int, adapter_nr ) 131 __field(__u16, nr_msgs ) 132 __field(__s16, ret ) 133 ), 134 TP_fast_assign( 135 __entry->adapter_nr = adap->nr; 136 __entry->nr_msgs = num; 137 __entry->ret = ret; 138 ), 139 TP_printk("i2c-%d n=%u ret=%d", 140 __entry->adapter_nr, 141 __entry->nr_msgs, 142 __entry->ret 143 ), 144 i2c_transfer_trace_reg, 145 i2c_transfer_trace_unreg); 146 147 #endif /* _TRACE_I2C_H */ 148 149 /* This part must be outside protection */ 150 #include <trace/define_trace.h> 151