igb: Ethtool support to enable and disable EEE

This patch allows users to enable and disable EEE using Ethtool.
It also allows users to get EEE settings, as supported by the device.

Signed-off-by: Akeem G Abodunrin <akeem.g.abodunrin@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 100 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/igb/igb_ethtool.c b/drivers/net/ethernet/intel/igb/igb_ethtool.c
index 2b82a53f4ab3..0acf590d4a83 100644
--- a/drivers/net/ethernet/intel/igb/igb_ethtool.c
+++ b/drivers/net/ethernet/intel/igb/igb_ethtool.c
@@ -2529,6 +2529,104 @@ static int igb_set_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd)
 	return ret;
 }
 
+static int igb_get_eee(struct net_device *netdev, struct ethtool_eee *edata)
+{
+	struct igb_adapter *adapter = netdev_priv(netdev);
+	struct e1000_hw *hw = &adapter->hw;
+	u32 ipcnfg, eeer;
+
+	if ((hw->mac.type < e1000_i350) ||
+	    (hw->phy.media_type != e1000_media_type_copper))
+		return -EOPNOTSUPP;
+
+	edata->supported = (SUPPORTED_1000baseT_Full |
+			    SUPPORTED_100baseT_Full);
+
+	ipcnfg = rd32(E1000_IPCNFG);
+	eeer = rd32(E1000_EEER);
+
+	/* EEE status on negotiated link */
+	if (ipcnfg & E1000_IPCNFG_EEE_1G_AN)
+		edata->advertised = ADVERTISED_1000baseT_Full;
+
+	if (ipcnfg & E1000_IPCNFG_EEE_100M_AN)
+		edata->advertised |= ADVERTISED_100baseT_Full;
+
+	if (eeer & E1000_EEER_EEE_NEG)
+		edata->eee_active = true;
+
+	edata->eee_enabled = !hw->dev_spec._82575.eee_disable;
+
+	if (eeer & E1000_EEER_TX_LPI_EN)
+		edata->tx_lpi_enabled = true;
+
+	/* Report correct negotiated EEE status for devices that
+	 * wrongly report EEE at half-duplex
+	 */
+	if (adapter->link_duplex == HALF_DUPLEX) {
+		edata->eee_enabled = false;
+		edata->eee_active = false;
+		edata->tx_lpi_enabled = false;
+		edata->advertised &= ~edata->advertised;
+	}
+
+	return 0;
+}
+
+static int igb_set_eee(struct net_device *netdev,
+		       struct ethtool_eee *edata)
+{
+	struct igb_adapter *adapter = netdev_priv(netdev);
+	struct e1000_hw *hw = &adapter->hw;
+	struct ethtool_eee eee_curr;
+	s32 ret_val;
+
+	if ((hw->mac.type < e1000_i350) ||
+	    (hw->phy.media_type != e1000_media_type_copper))
+		return -EOPNOTSUPP;
+
+	ret_val = igb_get_eee(netdev, &eee_curr);
+	if (ret_val)
+		return ret_val;
+
+	if (eee_curr.eee_enabled) {
+		if (eee_curr.tx_lpi_enabled != edata->tx_lpi_enabled) {
+			dev_err(&adapter->pdev->dev,
+				"Setting EEE tx-lpi is not supported\n");
+			return -EINVAL;
+		}
+
+		/* Tx LPI timer is not implemented currently */
+		if (edata->tx_lpi_timer) {
+			dev_err(&adapter->pdev->dev,
+				"Setting EEE Tx LPI timer is not supported\n");
+			return -EINVAL;
+		}
+
+		if (eee_curr.advertised != edata->advertised) {
+			dev_err(&adapter->pdev->dev,
+				"Setting EEE Advertisement is not supported\n");
+			return -EINVAL;
+		}
+
+	} else if (!edata->eee_enabled) {
+		dev_err(&adapter->pdev->dev,
+			"Setting EEE options are not supported with EEE disabled\n");
+			return -EINVAL;
+		}
+
+	if (hw->dev_spec._82575.eee_disable != !edata->eee_enabled) {
+		hw->dev_spec._82575.eee_disable = !edata->eee_enabled;
+		igb_set_eee_i350(hw);
+
+		/* reset link */
+		if (!netif_running(netdev))
+			igb_reset(adapter);
+	}
+
+	return 0;
+}
+
 static int igb_ethtool_begin(struct net_device *netdev)
 {
 	struct igb_adapter *adapter = netdev_priv(netdev);
@@ -2571,6 +2669,8 @@ static const struct ethtool_ops igb_ethtool_ops = {
 	.get_ts_info            = igb_get_ts_info,
 	.get_rxnfc		= igb_get_rxnfc,
 	.set_rxnfc		= igb_set_rxnfc,
+	.get_eee		= igb_get_eee,
+	.set_eee		= igb_set_eee,
 	.begin			= igb_ethtool_begin,
 	.complete		= igb_ethtool_complete,
 };