e1000e: move settting of flow control refresh timer to link setup code

The flow control refresh timer value needs to be saved off so that it can
be programmed into the approrpiate register when applicable but without a
reset, e.g. when changing flow control parameters via ethtool.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/e1000e/hw.h

@@ -901,6 +901,7 @@ struct e1000_fc_info {
 	u32 high_water;          /* Flow control high-water mark */
 	u32 low_water;           /* Flow control low-water mark */
 	u16 pause_time;          /* Flow control pause timer */
+	u16 refresh_time;        /* Flow control refresh timer */
 	bool send_xon;           /* Flow control send XON */
 	bool strict_ieee;        /* Strict IEEE mode */
 	enum e1000_fc_mode current_mode; /* FC mode in effect */

drivers/net/e1000e/ich8lan.c

@@ -2823,6 +2823,8 @@ static s32 e1000_setup_link_ich8lan(struct e1000_hw *hw)
 	ew32(FCTTV, hw->fc.pause_time);
 	if ((hw->phy.type == e1000_phy_82578) ||
 	    (hw->phy.type == e1000_phy_82577)) {
+		ew32(FCRTV_PCH, hw->fc.refresh_time);
+
 		ret_val = hw->phy.ops.write_reg(hw,
 		                             PHY_REG(BM_PORT_CTRL_PAGE, 27),
 		                             hw->fc.pause_time);

drivers/net/e1000e/netdev.c

@@ -3134,6 +3134,7 @@ void e1000e_reset(struct e1000_adapter *adapter)
 			fc->high_water = 0x5000;
 			fc->low_water  = 0x3000;
 		}
+		fc->refresh_time = 0x1000;
 	} else {
 		if ((adapter->flags & FLAG_HAS_ERT) &&
 		    (adapter->netdev->mtu > ETH_DATA_LEN))
@@ -3171,10 +3172,6 @@ void e1000e_reset(struct e1000_adapter *adapter)
 	if (mac->ops.init_hw(hw))
 		e_err("Hardware Error\n");
 
-	/* additional part of the flow-control workaround above */
-	if (hw->mac.type == e1000_pchlan)
-		ew32(FCRTV_PCH, 0x1000);
-
 	e1000_update_mng_vlan(adapter);
 
 	/* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */