From 916102c6664dcfc11f76ab1da27882aee1d01d8c Mon Sep 17 00:00:00 2001 From: "Lendacky, Thomas" Date: Fri, 16 Jan 2015 12:46:45 -0600 Subject: [PATCH] amd-xgbe: Clear all state during a device restart When performing a device restart, like during an MTU change, sometimes the device queues still have data and get hung up trying to flush resulting in the device becoming unresponsive until brought down and back up. To prevent this, always perform a device reset during a restart. Signed-off-by: Tom Lendacky Signed-off-by: David S. Miller --- drivers/net/ethernet/amd/xgbe/xgbe-dev.c | 18 ++++++++++++++++++ drivers/net/ethernet/amd/xgbe/xgbe-drv.c | 11 +++++------ drivers/net/ethernet/amd/xgbe/xgbe-main.c | 1 + 3 files changed, 24 insertions(+), 6 deletions(-) diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-dev.c b/drivers/net/ethernet/amd/xgbe/xgbe-dev.c index 53f5f66ec2ee..e424997afc55 100644 --- a/drivers/net/ethernet/amd/xgbe/xgbe-dev.c +++ b/drivers/net/ethernet/amd/xgbe/xgbe-dev.c @@ -2107,6 +2107,23 @@ static void xgbe_config_jumbo_enable(struct xgbe_prv_data *pdata) XGMAC_IOWRITE_BITS(pdata, MAC_RCR, JE, val); } +static void xgbe_config_mac_speed(struct xgbe_prv_data *pdata) +{ + switch (pdata->phy_speed) { + case SPEED_10000: + xgbe_set_xgmii_speed(pdata); + break; + + case SPEED_2500: + xgbe_set_gmii_2500_speed(pdata); + break; + + case SPEED_1000: + xgbe_set_gmii_speed(pdata); + break; + } +} + static void xgbe_config_checksum_offload(struct xgbe_prv_data *pdata) { if (pdata->netdev->features & NETIF_F_RXCSUM) @@ -2757,6 +2774,7 @@ static int xgbe_init(struct xgbe_prv_data *pdata) xgbe_config_mac_address(pdata); xgbe_config_jumbo_enable(pdata); xgbe_config_flow_control(pdata); + xgbe_config_mac_speed(pdata); xgbe_config_checksum_offload(pdata); xgbe_config_vlan_support(pdata); xgbe_config_mmc(pdata); diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c index e2e921768185..bdb373c87050 100644 --- a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c +++ b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c @@ -927,7 +927,7 @@ static void xgbe_stop(struct xgbe_prv_data *pdata) DBGPR("<--xgbe_stop\n"); } -static void xgbe_restart_dev(struct xgbe_prv_data *pdata, unsigned int reset) +static void xgbe_restart_dev(struct xgbe_prv_data *pdata) { struct xgbe_channel *channel; struct xgbe_hw_if *hw_if = &pdata->hw_if; @@ -950,9 +950,8 @@ static void xgbe_restart_dev(struct xgbe_prv_data *pdata, unsigned int reset) xgbe_free_tx_data(pdata); xgbe_free_rx_data(pdata); - /* Issue software reset to device if requested */ - if (reset) - hw_if->exit(pdata); + /* Issue software reset to device */ + hw_if->exit(pdata); xgbe_start(pdata); @@ -967,7 +966,7 @@ static void xgbe_restart(struct work_struct *work) rtnl_lock(); - xgbe_restart_dev(pdata, 1); + xgbe_restart_dev(pdata); rtnl_unlock(); } @@ -1587,7 +1586,7 @@ static int xgbe_change_mtu(struct net_device *netdev, int mtu) pdata->rx_buf_size = ret; netdev->mtu = mtu; - xgbe_restart_dev(pdata, 0); + xgbe_restart_dev(pdata); DBGPR("<--xgbe_change_mtu\n"); diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-main.c b/drivers/net/ethernet/amd/xgbe/xgbe-main.c index dbd3850b8b0a..a50dccd67de7 100644 --- a/drivers/net/ethernet/amd/xgbe/xgbe-main.c +++ b/drivers/net/ethernet/amd/xgbe/xgbe-main.c @@ -148,6 +148,7 @@ static void xgbe_default_config(struct xgbe_prv_data *pdata) pdata->pause_autoneg = 1; pdata->tx_pause = 1; pdata->rx_pause = 1; + pdata->phy_speed = SPEED_UNKNOWN; pdata->power_down = 0; pdata->default_autoneg = AUTONEG_ENABLE; pdata->default_speed = SPEED_10000; -- 2.11.0