include/trace/events/i2c.h

Source file repositories/reference/linux-study-clean/include/trace/events/i2c.h

File Facts

System
Linux kernel
Corpus path
include/trace/events/i2c.h
Extension
.h
Size
4047 bytes
Lines
147
Domain
Repository Root And Misc
Bucket
include
Inferred role
Repository Root And Misc: implementation source
Status
source implementation candidate

Why This File Exists

Top-level or miscellaneous repository surface. Use this as map coverage unless a later manual pass promotes the file into a deeper subsystem dossier.

Dependency Surface

Detected Declarations

Annotated Snippet

#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			)

Annotation

Implementation Notes