net: netcp: Fixes SGMII reset on network interface shutdown
This patch asserts SGMII RTRESET, i.e. resetting the SGMII Tx/Rx
logic, during network interface shutdown to avoid having the
hardware wedge when shutting down with high incoming traffic rates.
This is cleared (brought out of RTRESET) when the interface is
brought back up.
Signed-off-by: WingMan Kwok <w-kwok2@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/ti/netcp_ethss.c b/drivers/net/ethernet/ti/netcp_ethss.c
index 9b7e0a3..a218812 100644
--- a/drivers/net/ethernet/ti/netcp_ethss.c
+++ b/drivers/net/ethernet/ti/netcp_ethss.c
@@ -1901,11 +1901,28 @@
writel(slave->mac_control, GBE_REG_ADDR(slave, emac_regs, mac_control));
}
+static void gbe_sgmii_rtreset(struct gbe_priv *priv,
+ struct gbe_slave *slave, bool set)
+{
+ void __iomem *sgmii_port_regs;
+
+ if (SLAVE_LINK_IS_XGMII(slave))
+ return;
+
+ if ((priv->ss_version == GBE_SS_VERSION_14) && (slave->slave_num >= 2))
+ sgmii_port_regs = priv->sgmii_port34_regs;
+ else
+ sgmii_port_regs = priv->sgmii_port_regs;
+
+ netcp_sgmii_rtreset(sgmii_port_regs, slave->slave_num, set);
+}
+
static void gbe_slave_stop(struct gbe_intf *intf)
{
struct gbe_priv *gbe_dev = intf->gbe_dev;
struct gbe_slave *slave = intf->slave;
+ gbe_sgmii_rtreset(gbe_dev, slave, true);
gbe_port_reset(slave);
/* Disable forwarding */
cpsw_ale_control_set(gbe_dev->ale, slave->port_num,
@@ -1947,6 +1964,7 @@
gbe_sgmii_config(priv, slave);
gbe_port_reset(slave);
+ gbe_sgmii_rtreset(priv, slave, false);
gbe_port_config(priv, slave, priv->rx_packet_max);
gbe_set_slave_mac(slave, gbe_intf);
/* enable forwarding */