From: Uwe Kleine-König Date: Tue, 22 Nov 2016 15:47:11 +0000 (+0100) Subject: net/phy: add trace events for mdio accesses X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=e22e996b72d47c7bf5bb6b17071b2e9d3db462d4;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git 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 Acked-by: Steven Rostedt Signed-off-by: David S. Miller --- diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c index 09deef4bed09..653d076eafe5 100644 --- a/drivers/net/phy/mdio_bus.c +++ b/drivers/net/phy/mdio_bus.c @@ -38,6 +38,9 @@ #include +#define CREATE_TRACE_POINTS +#include + 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); diff --git a/include/trace/events/mdio.h b/include/trace/events/mdio.h new file mode 100644 index 000000000000..00d85f5f54e4 --- /dev/null +++ b/include/trace/events/mdio.h @@ -0,0 +1,42 @@ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM mdio + +#if !defined(_TRACE_MDIO_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_MDIO_H + +#include + +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