net/txgbe/base: fix Tx with fiber hotplug

[ upstream commit 196e412b80afe165ca78457d5f9bb1a5bace28ea ]

Under heavy traffic, unplugging and plugging fiber optic cables may cause
Tx failure. The reason is that there is still traffic passing through at
PCS VR reset, during txgbe_set_link_to_*. So totally disable Rx and Tx
before PCS VR reset to fix it.

Fixes: 01c3cf5 ("net/txgbe: add autoneg control read and write")

Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>

drivers/net/txgbe/base/txgbe_phy.c

@@ -1519,8 +1519,9 @@ txgbe_set_link_to_kx4(struct txgbe_hw *hw, bool autoneg)
 		goto out;
 	}
 
-	wr32m(hw, TXGBE_MACTXCFG, TXGBE_MACTXCFG_TXE,
-			~TXGBE_MACTXCFG_TXE);
+	wr32m(hw, TXGBE_MACTXCFG, TXGBE_MACTXCFG_TXE, ~TXGBE_MACTXCFG_TXE);
+	wr32m(hw, TXGBE_MACRXCFG, TXGBE_MACRXCFG_ENA, ~TXGBE_MACRXCFG_ENA);
+	hw->mac.disable_sec_tx_path(hw);
 
 	/* 2. Disable xpcs AN-73 */
 	if (!autoneg)
@@ -1734,8 +1735,9 @@ txgbe_set_link_to_kx(struct txgbe_hw *hw,
 		goto out;
 	}
 
-	wr32m(hw, TXGBE_MACTXCFG, TXGBE_MACTXCFG_TXE,
-				~TXGBE_MACTXCFG_TXE);
+	wr32m(hw, TXGBE_MACTXCFG, TXGBE_MACTXCFG_TXE, ~TXGBE_MACTXCFG_TXE);
+	wr32m(hw, TXGBE_MACRXCFG, TXGBE_MACRXCFG_ENA, ~TXGBE_MACRXCFG_ENA);
+	hw->mac.disable_sec_tx_path(hw);
 
 	/* 2. Disable xpcs AN-73 */
 	if (!autoneg)
@@ -1941,8 +1943,9 @@ txgbe_set_link_to_sfi(struct txgbe_hw *hw,
 		goto out;
 	}
 
-	wr32m(hw, TXGBE_MACTXCFG, TXGBE_MACTXCFG_TXE,
-			~TXGBE_MACTXCFG_TXE);
+	wr32m(hw, TXGBE_MACTXCFG, TXGBE_MACTXCFG_TXE, ~TXGBE_MACTXCFG_TXE);
+	wr32m(hw, TXGBE_MACRXCFG, TXGBE_MACRXCFG_ENA, ~TXGBE_MACRXCFG_ENA);
+	hw->mac.disable_sec_tx_path(hw);
 
 	/* 2. Disable xpcs AN-73 */
 	wr32_epcs(hw, SR_AN_CTRL, 0x0);
@@ -2293,6 +2296,8 @@ void txgbe_autoc_write(struct txgbe_hw *hw, u64 autoc)
 			txgbe_set_sgmii_an37_ability(hw);
 	}
 
+	hw->mac.enable_sec_tx_path(hw);
+
 	if (speed == TXGBE_LINK_SPEED_10GB_FULL)
 		mactxcfg = TXGBE_MACTXCFG_SPEED_10G;
 	else if (speed == TXGBE_LINK_SPEED_1GB_FULL)
@@ -2302,6 +2307,7 @@ void txgbe_autoc_write(struct txgbe_hw *hw, u64 autoc)
 	wr32m(hw, TXGBE_MACTXCFG,
 		TXGBE_MACTXCFG_SPEED_MASK | TXGBE_MACTXCFG_TXE,
 		mactxcfg | TXGBE_MACTXCFG_TXE);
+	wr32m(hw, TXGBE_MACRXCFG, TXGBE_MACRXCFG_ENA, TXGBE_MACRXCFG_ENA);
 }
 
 void txgbe_bp_down_event(struct txgbe_hw *hw)