dpaa2-eth: Add helper functions

Add convenient helper functions that determines whether Rx/Tx pause
frames are enabled based on link state flags received from firmware.
Signed-off-by: NIoana Radulescu <ruxandra.radulescu@nxp.com>
Signed-off-by: NIoana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c

@@ -1333,8 +1333,7 @@ static int link_state_update(struct dpaa2_eth_priv *priv)
 	 * Rx FQ taildrop configuration as well. We configure taildrop
 	 * only when pause frame generation is disabled.
 	 */
-	tx_pause = !!(state.options & DPNI_LINK_OPT_PAUSE) ^
-		   !!(state.options & DPNI_LINK_OPT_ASYM_PAUSE);
+	tx_pause = dpaa2_eth_tx_pause_enabled(state.options);
 	dpaa2_eth_set_rx_taildrop(priv, !tx_pause);
 
 	/* When we manage the MAC/PHY using phylink there is no need

drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h

@@ -510,6 +510,17 @@ enum dpaa2_eth_rx_dist {
 	(dpaa2_eth_cmp_dpni_ver((priv), DPNI_PAUSE_VER_MAJOR,	\
 				DPNI_PAUSE_VER_MINOR) >= 0)
 
+static inline bool dpaa2_eth_tx_pause_enabled(u64 link_options)
+{
+	return !!(link_options & DPNI_LINK_OPT_PAUSE) ^
+	       !!(link_options & DPNI_LINK_OPT_ASYM_PAUSE);
+}
+
+static inline bool dpaa2_eth_rx_pause_enabled(u64 link_options)
+{
+	return !!(link_options & DPNI_LINK_OPT_PAUSE);
+}
+
 static inline
 unsigned int dpaa2_eth_needed_headroom(struct dpaa2_eth_priv *priv,
 				       struct sk_buff *skb)

drivers/net/ethernet/freescale/dpaa2/dpaa2-ethtool.c

@@ -130,9 +130,8 @@ static void dpaa2_eth_get_pauseparam(struct net_device *net_dev,
 		return;
 	}
 
-	pause->rx_pause = !!(link_options & DPNI_LINK_OPT_PAUSE);
-	pause->tx_pause = pause->rx_pause ^
-			  !!(link_options & DPNI_LINK_OPT_ASYM_PAUSE);
+	pause->rx_pause = dpaa2_eth_rx_pause_enabled(link_options);
+	pause->tx_pause = dpaa2_eth_tx_pause_enabled(link_options);
 	pause->autoneg = AUTONEG_DISABLE;
 }