| Message ID | 20170517221746.15538.89916.stgit@localhost6.localdomain6 |
|---|---|
| State | Accepted |
| Delegated to: | Jeff Kirsher |
| Headers | show |
> -----Original Message----- > From: Intel-wired-lan [mailto:intel-wired-lan-bounces@osuosl.org] On > Behalf Of Emil Tantilov > Sent: Wednesday, May 17, 2017 3:18 PM > To: intel-wired-lan@lists.osuosl.org > Subject: [Intel-wired-lan] [PATCH 2/5] ixgbe: add write flush when > configuring CS4223/7 > > Make sure the writes are processed immediately. Without the flush it is > possible for operations on one port to spill over the other as the resource is > shared. > > Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com> > --- > drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c | 20 > ++++++++++++++++++-- > 1 file changed, 18 insertions(+), 2 deletions(-) Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c index 870f9e1..cb5d363 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c @@ -1824,12 +1824,28 @@ static s32 ixgbe_setup_sfi_x550a(struct ixgbe_hw *hw, ixgbe_link_speed *speed) /* Configure CS4227/CS4223 LINE side to proper mode. */ reg_slice = IXGBE_CS4227_LINE_SPARE24_LSB + slice_offset; + + ret_val = hw->phy.ops.read_reg(hw, reg_slice, + IXGBE_MDIO_ZERO_DEV_TYPE, ®_phy_ext); + if (ret_val) + return ret_val; + + reg_phy_ext &= ~((IXGBE_CS4227_EDC_MODE_CX1 << 1) | + (IXGBE_CS4227_EDC_MODE_SR << 1)); + if (setup_linear) reg_phy_ext = (IXGBE_CS4227_EDC_MODE_CX1 << 1) | 1; else reg_phy_ext = (IXGBE_CS4227_EDC_MODE_SR << 1) | 1; - return hw->phy.ops.write_reg(hw, reg_slice, IXGBE_MDIO_ZERO_DEV_TYPE, - reg_phy_ext); + + ret_val = hw->phy.ops.write_reg(hw, reg_slice, + IXGBE_MDIO_ZERO_DEV_TYPE, reg_phy_ext); + if (ret_val) + return ret_val; + + /* Flush previous write with a read */ + return hw->phy.ops.read_reg(hw, reg_slice, + IXGBE_MDIO_ZERO_DEV_TYPE, ®_phy_ext); } /**
Make sure the writes are processed immediately. Without the flush it is possible for operations on one port to spill over the other as the resource is shared. Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com> --- drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c | 20 ++++++++++++++++++-- 1 file changed, 18 insertions(+), 2 deletions(-)