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gve: Get and set Rx copybreak via ethtool 

This adds support for getting and setting the RX copybreak
value via ethtool.

Reviewed-by: Yangchun Fu <yangchun@google.com>
Signed-off-by: Kuo Zhao <kuozhao@google.com>
Signed-off-by: David Awogbemila <awogbemila@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Kuo Zhao 2020-09-11 10:38:44 -07:00 committed by David S. Miller
parent e7a08121e0
commit d5f7543c86
1 changed files with 34 additions and 0 deletions
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34
drivers/net/ethernet/google/gve/gve_ethtool.c
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@ -230,6 +230,38 @@ static int gve_user_reset(struct net_device *netdev, u32 *flags)
return -EOPNOTSUPP;
}
static int gve_get_tunable(struct net_device *netdev,
const struct ethtool_tunable *etuna, void *value)
{
struct gve_priv *priv = netdev_priv(netdev);
switch (etuna->id) {
case ETHTOOL_RX_COPYBREAK:
*(u32 *)value = priv->rx_copybreak;
return 0;
default:
return -EOPNOTSUPP;
}
}
static int gve_set_tunable(struct net_device *netdev,
const struct ethtool_tunable *etuna, const void *value)
{
struct gve_priv *priv = netdev_priv(netdev);
u32 len;
switch (etuna->id) {
case ETHTOOL_RX_COPYBREAK:
len = *(u32 *)value;
if (len > PAGE_SIZE / 2)
return -EINVAL;
priv->rx_copybreak = len;
return 0;
default:
return -EOPNOTSUPP;
}
}
const struct ethtool_ops gve_ethtool_ops = {
.get_drvinfo = gve_get_drvinfo,
.get_strings = gve_get_strings,
@ -242,4 +274,6 @@ const struct ethtool_ops gve_ethtool_ops = {
.get_link = ethtool_op_get_link,
.get_ringparam = gve_get_ringparam,
.reset = gve_user_reset,
.get_tunable = gve_get_tunable,
.set_tunable = gve_set_tunable,
};