ixgbe: fix fc autoneg ethtool reporting.

Originally ixgbe_device_supports_autoneg_fc() was only expected to
be called by copper devices.  This would lead to false information
to be displayed via ethtool.

v2: changed ixgbe_device_supports_autoneg_fc() to a bool function,
    it returns bool.  Based on feedback from David Miller

Signed-off-by: Don Skidmore <donald.c.skidmore@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_common.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_common.c
index 9bcdeb8..ddbc3ee 100644 (file)
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_common.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_common.c
@@ -65,17 +65,41 @@ static s32 ixgbe_disable_pcie_master(struct ixgbe_hw *hw);
  *  function check the device id to see if the associated phy supports
  *  autoneg flow control.
  **/
-s32 ixgbe_device_supports_autoneg_fc(struct ixgbe_hw *hw)
+bool ixgbe_device_supports_autoneg_fc(struct ixgbe_hw *hw)
 {
+       bool supported = false;
+       ixgbe_link_speed speed;
+       bool link_up;
 
-       switch (hw->device_id) {
-       case IXGBE_DEV_ID_X540T:
-       case IXGBE_DEV_ID_X540T1:
-       case IXGBE_DEV_ID_82599_T3_LOM:
-               return 0;
+       switch (hw->phy.media_type) {
+       case ixgbe_media_type_fiber:
+               hw->mac.ops.check_link(hw, &speed, &link_up, false);
+               /* if link is down, assume supported */
+               if (link_up)
+                       supported = speed == IXGBE_LINK_SPEED_1GB_FULL ?
+                               true : false;
+               else
+                       supported = true;
+               break;
+       case ixgbe_media_type_backplane:
+               supported = true;
+               break;
+       case ixgbe_media_type_copper:
+               /* only some copper devices support flow control autoneg */
+               switch (hw->device_id) {
+               case IXGBE_DEV_ID_82599_T3_LOM:
+               case IXGBE_DEV_ID_X540T:
+               case IXGBE_DEV_ID_X540T1:
+                       supported = true;
+                       break;
+               default:
+                       break;
+               }
        default:
-               return IXGBE_ERR_FC_NOT_SUPPORTED;
+               break;
        }
+
+       return supported;
 }
 
 /**
@@ -234,7 +258,7 @@ static s32 ixgbe_setup_fc(struct ixgbe_hw *hw)
                                                      IXGBE_GSSR_MAC_CSR_SM);
 
        } else if ((hw->phy.media_type == ixgbe_media_type_copper) &&
-                   (ixgbe_device_supports_autoneg_fc(hw) == 0)) {
+                   ixgbe_device_supports_autoneg_fc(hw)) {
                hw->phy.ops.write_reg(hw, MDIO_AN_ADVERTISE,
                                      MDIO_MMD_AN, reg_cu);
        }
@@ -2392,7 +2416,7 @@ void ixgbe_fc_autoneg(struct ixgbe_hw *hw)
 
        /* Autoneg flow control on copper adapters */
        case ixgbe_media_type_copper:
-               if (ixgbe_device_supports_autoneg_fc(hw) == 0)
+               if (ixgbe_device_supports_autoneg_fc(hw))
                        ret_val = ixgbe_fc_autoneg_copper(hw);
                break;
 

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_common.h b/drivers/net/ethernet/intel/ixgbe/ixgbe_common.h
index 22eee38..1315b8a 100644 (file)
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_common.h
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_common.h
@@ -80,7 +80,7 @@ s32 ixgbe_disable_rx_buff_generic(struct ixgbe_hw *hw);
 s32 ixgbe_enable_rx_buff_generic(struct ixgbe_hw *hw);
 s32 ixgbe_enable_rx_dma_generic(struct ixgbe_hw *hw, u32 regval);
 s32 ixgbe_fc_enable_generic(struct ixgbe_hw *hw);
-s32 ixgbe_device_supports_autoneg_fc(struct ixgbe_hw *hw);
+bool ixgbe_device_supports_autoneg_fc(struct ixgbe_hw *hw);
 void ixgbe_fc_autoneg(struct ixgbe_hw *hw);
 
 s32 ixgbe_acquire_swfw_sync(struct ixgbe_hw *hw, u16 mask);

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
index 24e2e7a..ae58a92 100644 (file)
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
@@ -355,10 +355,11 @@ static void ixgbe_get_pauseparam(struct net_device *netdev,
        struct ixgbe_adapter *adapter = netdev_priv(netdev);
        struct ixgbe_hw *hw = &adapter->hw;
 
-       if (hw->fc.disable_fc_autoneg)
-               pause->autoneg = 0;
-       else
+       if (ixgbe_device_supports_autoneg_fc(hw) &&
+           !hw->fc.disable_fc_autoneg)
                pause->autoneg = 1;
+       else
+               pause->autoneg = 0;
 
        if (hw->fc.current_mode == ixgbe_fc_rx_pause) {
                pause->rx_pause = 1;
@@ -384,7 +385,7 @@ static int ixgbe_set_pauseparam(struct net_device *netdev,
 
        /* some devices do not support autoneg of link flow control */
        if ((pause->autoneg == AUTONEG_ENABLE) &&
-           (ixgbe_device_supports_autoneg_fc(hw) != 0))
+           !ixgbe_device_supports_autoneg_fc(hw))
                return -EINVAL;
 
        fc.disable_fc_autoneg = (pause->autoneg != AUTONEG_ENABLE);

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index d837f81..531ee44 100644 (file)
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -4721,8 +4721,7 @@ static int ixgbe_sw_init(struct ixgbe_adapter *adapter)
        ixgbe_pbthresh_setup(adapter);
        hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
        hw->fc.send_xon = true;
-       hw->fc.disable_fc_autoneg =
-               (ixgbe_device_supports_autoneg_fc(hw) == 0) ? false : true;
+       hw->fc.disable_fc_autoneg = ixgbe_device_supports_autoneg_fc(hw);
 
 #ifdef CONFIG_PCI_IOV
        /* assign number of SR-IOV VFs */