net/phy: add trace events for mdio accesses
Make it possible to generate trace events for mdio read and write accesses.
Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index 09deef4..653d076 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -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);