tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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>
authored by
Uwe Kleine-König
and committed by
David S. Miller
e22e996b
b9116823
+53
+11
drivers/net/phy/mdio_bus.c
+11
drivers/net/phy/mdio_bus.c
···
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#include <asm/irq.h>
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#define CREATE_TRACE_POINTS
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#include <trace/events/mdio.h>
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int mdiobus_register_device(struct mdio_device *mdiodev)
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{
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if (mdiodev->bus->mdio_map[mdiodev->addr])
···
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retval = bus->read(bus, addr, regnum);
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mutex_unlock(&bus->mdio_lock);
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trace_mdio_access(bus, 1, addr, regnum, retval, retval);
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return retval;
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}
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EXPORT_SYMBOL(mdiobus_read_nested);
···
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mutex_lock(&bus->mdio_lock);
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retval = bus->read(bus, addr, regnum);
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mutex_unlock(&bus->mdio_lock);
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trace_mdio_access(bus, 1, addr, regnum, retval, retval);
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return retval;
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}
···
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err = bus->write(bus, addr, regnum, val);
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mutex_unlock(&bus->mdio_lock);
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trace_mdio_access(bus, 0, addr, regnum, val, err);
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return err;
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}
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EXPORT_SYMBOL(mdiobus_write_nested);
···
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mutex_lock(&bus->mdio_lock);
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err = bus->write(bus, addr, regnum, val);
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mutex_unlock(&bus->mdio_lock);
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trace_mdio_access(bus, 0, addr, regnum, val, err);
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return err;
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}
+42
include/trace/events/mdio.h
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include/trace/events/mdio.h
···
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM mdio
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#if !defined(_TRACE_MDIO_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_MDIO_H
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#include <linux/tracepoint.h>
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TRACE_EVENT_CONDITION(mdio_access,
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TP_PROTO(struct mii_bus *bus, char read,
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u8 addr, unsigned regnum, u16 val, int err),
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TP_ARGS(bus, read, addr, regnum, val, err),
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TP_CONDITION(err >= 0),
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TP_STRUCT__entry(
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__array(char, busid, MII_BUS_ID_SIZE)
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__field(char, read)
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__field(u8, addr)
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__field(u16, val)
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__field(unsigned, regnum)
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),
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TP_fast_assign(
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strncpy(__entry->busid, bus->id, MII_BUS_ID_SIZE);
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__entry->read = read;
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__entry->addr = addr;
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__entry->regnum = regnum;
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__entry->val = val;
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),
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TP_printk("%s %-5s phy:0x%02hhx reg:0x%02x val:0x%04hx",
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__entry->busid, __entry->read ? "read" : "write",
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__entry->addr, __entry->regnum, __entry->val)
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);
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#endif /* if !defined(_TRACE_MDIO_H) || defined(TRACE_HEADER_MULTI_READ) */
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/* This part must be outside protection */
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#include <trace/define_trace.h>