[PATCH net-next v8 04/10] bng_en: implement ethtool pauseparam operations

[Vikas Gupta <vikas.gupta@broadcom.com>]

From: Bhargava Marreddy <bhargava.marreddy@broadcom.com>

Implement .get_pauseparam and .set_pauseparam to support flow control
configuration. This allows reporting and setting of autoneg, RX pause,
and TX pause states.

Signed-off-by: Bhargava Marreddy <bhargava.marreddy@broadcom.com>
Reviewed-by: Vikas Gupta <vikas.gupta@broadcom.com>
---
 .../net/ethernet/broadcom/bnge/bnge_ethtool.c | 58 +++++++++++++++++++
 1 file changed, 58 insertions(+)

diff --git a/drivers/net/ethernet/broadcom/bnge/bnge_ethtool.c b/drivers/net/ethernet/broadcom/bnge/bnge_ethtool.c
index e4d3041db0af..01382ad784e3 100644
--- a/drivers/net/ethernet/broadcom/bnge/bnge_ethtool.c
+++ b/drivers/net/ethernet/broadcom/bnge/bnge_ethtool.c
@@ -42,6 +42,62 @@ static void bnge_get_drvinfo(struct net_device *dev,
 	strscpy(info->bus_info, pci_name(bd->pdev), sizeof(info->bus_info));
 }
 
+static void bnge_get_pauseparam(struct net_device *dev,
+				struct ethtool_pauseparam *epause)
+{
+	struct bnge_net *bn = netdev_priv(dev);
+	struct bnge_dev *bd = bn->bd;
+
+	if (bd->phy_flags & BNGE_PHY_FL_NO_PAUSE) {
+		epause->autoneg = 0;
+		epause->rx_pause = 0;
+		epause->tx_pause = 0;
+		return;
+	}
+
+	epause->autoneg = !!(bn->eth_link_info.autoneg &
+			     BNGE_AUTONEG_FLOW_CTRL);
+	epause->rx_pause = !!(bn->eth_link_info.req_flow_ctrl &
+			      BNGE_LINK_PAUSE_RX);
+	epause->tx_pause = !!(bn->eth_link_info.req_flow_ctrl &
+			      BNGE_LINK_PAUSE_TX);
+}
+
+static int bnge_set_pauseparam(struct net_device *dev,
+			       struct ethtool_pauseparam *epause)
+{
+	struct bnge_ethtool_link_info *elink_info;
+	struct bnge_net *bn = netdev_priv(dev);
+	struct bnge_dev *bd = bn->bd;
+
+	if (!BNGE_PHY_CFG_ABLE(bd) || (bd->phy_flags & BNGE_PHY_FL_NO_PAUSE))
+		return -EOPNOTSUPP;
+
+	elink_info = &bn->eth_link_info;
+
+	if (epause->autoneg) {
+		if (!(elink_info->autoneg & BNGE_AUTONEG_SPEED))
+			return -EINVAL;
+
+		elink_info->autoneg |= BNGE_AUTONEG_FLOW_CTRL;
+	} else {
+		if (elink_info->autoneg & BNGE_AUTONEG_FLOW_CTRL)
+			elink_info->force_link_chng = true;
+		elink_info->autoneg &= ~BNGE_AUTONEG_FLOW_CTRL;
+	}
+
+	elink_info->req_flow_ctrl = 0;
+	if (epause->rx_pause)
+		elink_info->req_flow_ctrl |= BNGE_LINK_PAUSE_RX;
+	if (epause->tx_pause)
+		elink_info->req_flow_ctrl |= BNGE_LINK_PAUSE_TX;
+
+	if (netif_running(dev))
+		return bnge_hwrm_set_pause(bn);
+
+	return 0;
+}
+
 static const struct ethtool_ops bnge_ethtool_ops = {
 	.cap_link_lanes_supported	= 1,
 	.get_link_ksettings	= bnge_get_link_ksettings,
@@ -49,6 +105,8 @@ static const struct ethtool_ops bnge_ethtool_ops = {
 	.get_drvinfo		= bnge_get_drvinfo,
 	.get_link		= bnge_get_link,
 	.nway_reset		= bnge_nway_reset,
+	.get_pauseparam		= bnge_get_pauseparam,
+	.set_pauseparam		= bnge_set_pauseparam,
 };
 
 void bnge_set_ethtool_ops(struct net_device *dev)
-- 
2.47.1