[PATCH 06/24] net/axgbe: reset link when the link never comes back

[Venkat Kumar Ande]

Normally, auto negotiation and reconnect should be automatically done by
the hardware. But there seems to be an issue where auto negotiation has
to be restarted manually. This happens because of link training and so
even though still connected to the partner the link never "comes back".
This needs an auto-negotiation restart.

Signed-off-by: Venkat Kumar Ande <VenkatKumar.Ande at amd.com>
---
 drivers/net/axgbe/axgbe_mdio.c     | 2 +-
 drivers/net/axgbe/axgbe_phy_impl.c | 7 +++++++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/net/axgbe/axgbe_mdio.c b/drivers/net/axgbe/axgbe_mdio.c
index 0beeb1d0f5..151b30e2ab 100644
--- a/drivers/net/axgbe/axgbe_mdio.c
+++ b/drivers/net/axgbe/axgbe_mdio.c
@@ -1058,7 +1058,7 @@ static void axgbe_phy_status(struct axgbe_port *pdata)
 							     &an_restart);
 	if (an_restart) {
 		axgbe_phy_config_aneg(pdata);
-		return;
+		goto adjust_link;
 	}
 
 	if (pdata->phy.link) {
diff --git a/drivers/net/axgbe/axgbe_phy_impl.c b/drivers/net/axgbe/axgbe_phy_impl.c
index b5796b13e0..968ff1f867 100644
--- a/drivers/net/axgbe/axgbe_phy_impl.c
+++ b/drivers/net/axgbe/axgbe_phy_impl.c
@@ -1676,6 +1676,13 @@ static int axgbe_phy_link_status(struct axgbe_port *pdata, int *an_restart)
 	if (reg & MDIO_STAT1_LSTATUS)
 		return 1;
 
+	if (pdata->phy.autoneg == AUTONEG_ENABLE &&
+			phy_data->port_mode == AXGBE_PORT_MODE_BACKPLANE) {
+		if (rte_bit_relaxed_get32(AXGBE_LINK_INIT, &pdata->dev_state)) {
+			*an_restart = 1;
+		}
+	}
+
 	/* No link, attempt a receiver reset cycle */
 	if (phy_data->rrc_count++) {
 		phy_data->rrc_count = 0;
-- 
2.34.1