include/trace/events/i2c.h

   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>