[PATCH net-next 3/3] enic: add ethtool support for set/get rx_copybreak
From: Govindarajulu Varadarajan <hidden>
Date: 2014-07-22 17:32:17
Subsystem:
cisco vic ethernet nic driver, networking drivers, the rest · Maintainers:
Satish Kharat, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
This patch provides set_ringparam & get_ringparam ethtool_ops to set/get rx_copybreak. As of now, enic does not support change of rx/tx ring size. Allow change of rx_copybreak alone. Signed-off-by: Govindarajulu Varadarajan <redacted> --- drivers/net/ethernet/cisco/enic/enic_ethtool.c | 31 ++++++++++++++++++++++++++ 1 file changed, 31 insertions(+)
diff --git a/drivers/net/ethernet/cisco/enic/enic_ethtool.c b/drivers/net/ethernet/cisco/enic/enic_ethtool.c
index 523c9ce..6780719 100644
--- a/drivers/net/ethernet/cisco/enic/enic_ethtool.c
+++ b/drivers/net/ethernet/cisco/enic/enic_ethtool.c@@ -18,6 +18,7 @@ #include <linux/netdevice.h> #include <linux/ethtool.h> +#include <linux/if_vlan.h> #include "enic_res.h" #include "enic.h"
@@ -379,6 +380,34 @@ static int enic_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd, return ret; } +static void enic_get_ringparam(struct net_device *netdev, + struct ethtool_ringparam *ring) +{ + struct enic *enic = netdev_priv(netdev); + + ring->rx_max_pending = enic->rq[0].ring.desc_count; + ring->rx_pending = enic->rq[0].ring.desc_count; + ring->tx_max_pending = enic->wq[0].ring.desc_count; + ring->tx_pending = enic->wq[0].ring.desc_count; + ring->rx_copybreak_pending = enic->rx_copybreak; + ring->rx_max_copybreak_pending = netdev->mtu + VLAN_ETH_HLEN; +} + +static int enic_set_ringparam(struct net_device *netdev, + struct ethtool_ringparam *ring) +{ + struct enic *enic = netdev_priv(netdev); + + if (ring->rx_copybreak_pending > (netdev->mtu + VLAN_ETH_HLEN) || + enic->rq[0].ring.desc_count != ring->rx_pending || + enic->wq[0].ring.desc_count != ring->tx_pending || + ring->rx_mini_pending || ring->rx_jumbo_pending) + return -EINVAL; + enic->rx_copybreak = ring->rx_copybreak_pending; + + return 0; +} + static const struct ethtool_ops enic_ethtool_ops = { .get_settings = enic_get_settings, .get_drvinfo = enic_get_drvinfo,
@@ -391,6 +420,8 @@ static const struct ethtool_ops enic_ethtool_ops = { .get_coalesce = enic_get_coalesce, .set_coalesce = enic_set_coalesce, .get_rxnfc = enic_get_rxnfc, + .get_ringparam = enic_get_ringparam, + .set_ringparam = enic_set_ringparam, }; void enic_set_ethtool_ops(struct net_device *netdev)
--
2.0.2