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Commit e22e996b authored by Uwe Kleine-König's avatar Uwe Kleine-König Committed by David S. Miller
Browse files

net/phy: add trace events for mdio accesses 



Make it possible to generate trace events for mdio read and write accesses.

Signed-off-by: default avatarUwe Kleine-König <uwe@kleine-koenig.org>
Acked-by: default avatarSteven Rostedt <rostedt@goodmis.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent b9116823

drivers/net/phy/mdio_bus.c

+11 −0
Original line number Diff line number Diff line
@@ -38,6 +38,9 @@ 


#include <asm/irq.h>



#define CREATE_TRACE_POINTS

#include <trace/events/mdio.h>



int mdiobus_register_device(struct mdio_device *mdiodev)

{

	if (mdiodev->bus->mdio_map[mdiodev->addr])
@@ -461,6 +464,8 @@ int mdiobus_read_nested(struct mii_bus *bus, int addr, u32 regnum) 
	retval = bus->read(bus, addr, regnum);

	mutex_unlock(&bus->mdio_lock);



	trace_mdio_access(bus, 1, addr, regnum, retval, retval);



	return retval;

}

EXPORT_SYMBOL(mdiobus_read_nested);
@@ -485,6 +490,8 @@ int mdiobus_read(struct mii_bus *bus, int addr, u32 regnum) 
	retval = bus->read(bus, addr, regnum);

	mutex_unlock(&bus->mdio_lock);



	trace_mdio_access(bus, 1, addr, regnum, retval, retval);



	return retval;

}

EXPORT_SYMBOL(mdiobus_read);
@@ -513,6 +520,8 @@ int mdiobus_write_nested(struct mii_bus *bus, int addr, u32 regnum, u16 val) 
	err = bus->write(bus, addr, regnum, val);

	mutex_unlock(&bus->mdio_lock);



	trace_mdio_access(bus, 0, addr, regnum, val, err);



	return err;

}

EXPORT_SYMBOL(mdiobus_write_nested);
@@ -538,6 +547,8 @@ int mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val) 
	err = bus->write(bus, addr, regnum, val);

	mutex_unlock(&bus->mdio_lock);



	trace_mdio_access(bus, 0, addr, regnum, val, err);



	return err;

}

EXPORT_SYMBOL(mdiobus_write);

include/trace/events/mdio.h

0 → 100644
+42 −0
Original line number Diff line number Diff line 
#undef TRACE_SYSTEM

#define TRACE_SYSTEM mdio



#if !defined(_TRACE_MDIO_H) || defined(TRACE_HEADER_MULTI_READ)

#define _TRACE_MDIO_H



#include <linux/tracepoint.h>



TRACE_EVENT_CONDITION(mdio_access,



	TP_PROTO(struct mii_bus *bus, char read,

		 u8 addr, unsigned regnum, u16 val, int err),



	TP_ARGS(bus, read, addr, regnum, val, err),



	TP_CONDITION(err >= 0),



	TP_STRUCT__entry(

		__array(char, busid, MII_BUS_ID_SIZE)

		__field(char, read)

		__field(u8, addr)

		__field(u16, val)

		__field(unsigned, regnum)

	),



	TP_fast_assign(

		strncpy(__entry->busid, bus->id, MII_BUS_ID_SIZE);

		__entry->read = read;

		__entry->addr = addr;

		__entry->regnum = regnum;

		__entry->val = val;

	),



	TP_printk("%s %-5s phy:0x%02hhx reg:0x%02x val:0x%04hx",

		  __entry->busid, __entry->read ? "read" : "write",

		  __entry->addr, __entry->regnum, __entry->val)

);



#endif /* if !defined(_TRACE_MDIO_H) || defined(TRACE_HEADER_MULTI_READ) */



/* This part must be outside protection */

#include <trace/define_trace.h>