netdev - [PATCH RFC 20/26] net: mvneta: add flow control support via phylink

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Message-Id: <E1a5zkT-00076W-UC@rmk-PC.arm.linux.org.uk>
Date:	Mon, 07 Dec 2015 17:38:53 +0000
From:	Russell King <rmk+kernel@....linux.org.uk>
To:	Florian Fainelli <f.fainelli@...il.com>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
Cc:	netdev@...r.kernel.org
Subject: [PATCH RFC 20/26] net: mvneta: add flow control support via phylink

Add flow control support to mvneta, including the ethtool hooks.  This
uses the phylink code to calculate the result of autonegotiation where
a phy is attached, and to handle the ethtool settings.

Signed-off-by: Russell King <rmk+kernel@....linux.org.uk>
---
 drivers/net/ethernet/marvell/mvneta.c | 29 +++++++++++++++++++++++++++--
 1 file changed, 27 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c
index 82aa2b59a249..00cfb120e324 100644
--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -2701,9 +2701,13 @@ static void mvneta_mac_config(struct net_device *ndev, unsigned int mode,
 		if (state->advertising & ADVERTISED_Pause)
 			new_an |= MVNETA_GMAC_ADVERT_SYM_FLOW_CTRL;
 
+		if (state->pause & MLO_PAUSE_AN && state->an_enabled)
+			new_an |= MVNETA_GMAC_AN_FLOW_CTRL_EN;
+		else if (state->pause & MLO_PAUSE_TXRX_MASK)
+			new_an |= MVNETA_GMAC_CONFIG_FLOW_CTRL;
+
 		if (state->an_enabled)
-			new_an |= MVNETA_GMAC_AN_FLOW_CTRL_EN |
-				  MVNETA_GMAC_AN_DUPLEX_EN;
+			new_an |= MVNETA_GMAC_AN_DUPLEX_EN;
 		else if (state->duplex)
 			new_an |= MVNETA_GMAC_CONFIG_FULL_DUPLEX;
 		break;
@@ -2717,6 +2721,9 @@ static void mvneta_mac_config(struct net_device *ndev, unsigned int mode,
 			new_an |= MVNETA_GMAC_CONFIG_GMII_SPEED;
 		else if (state->speed == SPEED_100)
 			new_an |= MVNETA_GMAC_CONFIG_MII_SPEED;
+
+		if (state->pause & MLO_PAUSE_TXRX_MASK)
+			new_an |= MVNETA_GMAC_CONFIG_FLOW_CTRL;
 		break;
 	}
 
@@ -3116,6 +3123,22 @@ static int mvneta_ethtool_set_ringparam(struct net_device *dev,
 	return 0;
 }
 
+static void mvneta_ethtool_get_pauseparam(struct net_device *dev,
+					  struct ethtool_pauseparam *pause)
+{
+	struct mvneta_port *pp = netdev_priv(dev);
+
+	phylink_ethtool_get_pauseparam(pp->phylink, pause);
+}
+
+static int mvneta_ethtool_set_pauseparam(struct net_device *dev,
+					 struct ethtool_pauseparam *pause)
+{
+	struct mvneta_port *pp = netdev_priv(dev);
+
+	return phylink_ethtool_set_pauseparam(pp->phylink, pause);
+}
+
 static void mvneta_ethtool_get_strings(struct net_device *netdev, u32 sset,
 				       u8 *data)
 {
@@ -3197,6 +3220,8 @@ const struct ethtool_ops mvneta_eth_tool_ops = {
 	.get_drvinfo    = mvneta_ethtool_get_drvinfo,
 	.get_ringparam  = mvneta_ethtool_get_ringparam,
 	.set_ringparam	= mvneta_ethtool_set_ringparam,
+	.get_pauseparam	= mvneta_ethtool_get_pauseparam,
+	.set_pauseparam	= mvneta_ethtool_set_pauseparam,
 	.get_strings	= mvneta_ethtool_get_strings,
 	.get_ethtool_stats = mvneta_ethtool_get_stats,
 	.get_sset_count	= mvneta_ethtool_get_sset_count,
-- 
2.1.0

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