diff options
| author | Steve Douthit <stephend@silicom-usa.com> | 2018-12-06 15:50:43 +0000 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2018-12-20 12:22:39 -0800 |
| commit | 643bae17fd4ccb503cdc6d99c1b4fbd2c4ca6a78 (patch) | |
| tree | 268d0dfb89986bb8dd6c8f4cb160c9cc32890b6d /drivers/net | |
| parent | 8fa10ef01260937eb540b4e9bbc3efa023595993 (diff) | |
ixgbe: use mii_bus to handle MII related ioctls
Use the mii_bus callbacks to address the entire clause 22/45 address
space. Enables userspace to poke switch registers instead of a single
PHY address.
The ixgbe firmware may be polling PHYs in a way that is not protected by
the mii_bus lock. This isn't new behavior, but as Andrew Lunn pointed
out there are more addresses available for conflicts.
Signed-off-by: Stephen Douthit <stephend@silicom-usa.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c index 7a3798ff2366..daff8183534b 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c @@ -8791,6 +8791,15 @@ ixgbe_mdio_read(struct net_device *netdev, int prtad, int devad, u16 addr) u16 value; int rc; + if (adapter->mii_bus) { + int regnum = addr; + + if (devad != MDIO_DEVAD_NONE) + regnum |= (devad << 16) | MII_ADDR_C45; + + return mdiobus_read(adapter->mii_bus, prtad, regnum); + } + if (prtad != hw->phy.mdio.prtad) return -EINVAL; rc = hw->phy.ops.read_reg(hw, addr, devad, &value); @@ -8805,6 +8814,15 @@ static int ixgbe_mdio_write(struct net_device *netdev, int prtad, int devad, struct ixgbe_adapter *adapter = netdev_priv(netdev); struct ixgbe_hw *hw = &adapter->hw; + if (adapter->mii_bus) { + int regnum = addr; + + if (devad != MDIO_DEVAD_NONE) + regnum |= (devad << 16) | MII_ADDR_C45; + + return mdiobus_write(adapter->mii_bus, prtad, regnum, value); + } + if (prtad != hw->phy.mdio.prtad) return -EINVAL; return hw->phy.ops.write_reg(hw, addr, devad, value); |