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/* I2C message transfer tracepoints
*
* Copyright (C) 2013 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public Licence
* as published by the Free Software Foundation; either version
* 2 of the Licence, or (at your option) any later version.
*/
#undef TRACE_SYSTEM
#define TRACE_SYSTEM i2c
#if !defined(_TRACE_I2C_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_I2C_H
#include <linux/i2c.h>
#include <linux/tracepoint.h>
/*
* drivers/i2c/i2c-core-base.c
*/
extern int i2c_transfer_trace_reg(void);
extern void i2c_transfer_trace_unreg(void);
/*
* __i2c_transfer() write request
*/
TRACE_EVENT_FN(i2c_write,
TP_PROTO(const struct i2c_adapter *adap, const struct i2c_msg *msg,
int num),
TP_ARGS(adap, msg, num),
TP_STRUCT__entry(
__field(int, adapter_nr )
__field(__u16, msg_nr )
__field(__u16, addr )
__field(__u16, flags )
__field(__u16, len )
__dynamic_array(__u8, buf, msg->len) ),
TP_fast_assign(
__entry->adapter_nr = adap->nr;
__entry->msg_nr = num;
__entry->addr = msg->addr;
__entry->flags = msg->flags;
__entry->len = msg->len;
memcpy(__get_dynamic_array(buf), msg->buf, msg->len);
),
TP_printk("i2c-%d #%u a=%03x f=%04x l=%u [%*phD]",
__entry->adapter_nr,
__entry->msg_nr,
__entry->addr,
__entry->flags,
__entry->len,
__entry->len, __get_dynamic_array(buf)
),
i2c_transfer_trace_reg,
i2c_transfer_trace_unreg);
/*
* __i2c_transfer() read request
*/
TRACE_EVENT_FN(i2c_read,
TP_PROTO(const struct i2c_adapter *adap, const struct i2c_msg *msg,
int num),
TP_ARGS(adap, msg, num),
TP_STRUCT__entry(
__field(int, adapter_nr )
__field(__u16, msg_nr )
__field(__u16, addr )
__field(__u16, flags )
__field(__u16, len )
),
TP_fast_assign(
__entry->adapter_nr = adap->nr;
__entry->msg_nr = num;
__entry->addr = msg->addr;
__entry->flags = msg->flags;
__entry->len = msg->len;
),
TP_printk("i2c-%d #%u a=%03x f=%04x l=%u",
__entry->adapter_nr,
__entry->msg_nr,
__entry->addr,
__entry->flags,
__entry->len
),
i2c_transfer_trace_reg,
i2c_transfer_trace_unreg);
/*
* __i2c_transfer() read reply
*/
TRACE_EVENT_FN(i2c_reply,
TP_PROTO(const struct i2c_adapter *adap, const struct i2c_msg *msg,
int num),
TP_ARGS(adap, msg, num),
TP_STRUCT__entry(
__field(int, adapter_nr )
__field(__u16, msg_nr )
__field(__u16, addr )
__field(__u16, flags )
__field(__u16, len )
__dynamic_array(__u8, buf, msg->len) ),
TP_fast_assign(
__entry->adapter_nr = adap->nr;
__entry->msg_nr = num;
__entry->addr = msg->addr;
__entry->flags = msg->flags;
__entry->len = msg->len;
memcpy(__get_dynamic_array(buf), msg->buf, msg->len);
),
TP_printk("i2c-%d #%u a=%03x f=%04x l=%u [%*phD]",
__entry->adapter_nr,
__entry->msg_nr,
__entry->addr,
__entry->flags,
__entry->len,
__entry->len, __get_dynamic_array(buf)
),
i2c_transfer_trace_reg,
i2c_transfer_trace_unreg);
/*
* __i2c_transfer() result
*/
TRACE_EVENT_FN(i2c_result,
TP_PROTO(const struct i2c_adapter *adap, int num, int ret),
TP_ARGS(adap, num, ret),
TP_STRUCT__entry(
__field(int, adapter_nr )
__field(__u16, nr_msgs )
__field(__s16, ret )
),
TP_fast_assign(
__entry->adapter_nr = adap->nr;
__entry->nr_msgs = num;
__entry->ret = ret;
),
TP_printk("i2c-%d n=%u ret=%d",
__entry->adapter_nr,
__entry->nr_msgs,
__entry->ret
),
i2c_transfer_trace_reg,
i2c_transfer_trace_unreg);
#endif /* _TRACE_I2C_H */
/* This part must be outside protection */
#include <trace/define_trace.h>
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