RE: [EXT] Re: [PATCH RFC net-next 14/19] net: mvpp2: add ethtool flow control configuration support
From: Stefan Chulski <hidden>
Date: 2021-01-10 17:56:26
Also in:
lkml
quoted
@@ -5373,6 +5402,30 @@ static intmvpp2_ethtool_set_pause_param(struct net_device *dev,quoted
struct ethtool_pauseparam *pause) { struct mvpp2_port *port = netdev_priv(dev); + int i; + + if (pause->tx_pause && port->priv->global_tx_fc) { + port->tx_fc = true; + mvpp2_rxq_enable_fc(port); + if (port->priv->percpu_pools) { + for (i = 0; i < port->nrxqs; i++) + mvpp2_bm_pool_update_fc(port, &port- priv->bm_pools[i], true); + } else { + mvpp2_bm_pool_update_fc(port, port->pool_long,true);quoted
+ mvpp2_bm_pool_update_fc(port, port->pool_short,true);quoted
+ } + + } else if (port->priv->global_tx_fc) { + port->tx_fc = false; + mvpp2_rxq_disable_fc(port); + if (port->priv->percpu_pools) { + for (i = 0; i < port->nrxqs; i++) + mvpp2_bm_pool_update_fc(port, &port- priv->bm_pools[i], false); + } else { + mvpp2_bm_pool_update_fc(port, port->pool_long,false);quoted
+ mvpp2_bm_pool_update_fc(port, port->pool_short,false);quoted
+ } + }This looks wrong. Flow control is normally the result of auto negotiation. Both ends need to agree to it. Which is why mvpp2_ethtool_set_pause_param() passes the users request onto phylink. phylink will handle the autoneg and then ask the MAC to setup flow control depending on the result in mvpp2_mac_link_up(). Andrew
Ok, I would move it to mvpp2_mac_link_up. Stefan, Thanks.