From: Kuo Zhao <kuozhao@google.com>
Date: Fri, 11 Sep 2020 10:38:44 -0700
Subject: gve: Get and set Rx copybreak via ethtool
Patch-mainline: v5.10-rc1
Git-commit: d5f7543c86e0a889403abd42e27e911cc33144c3
References: bsc#1176940
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>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/google/gve/gve_ethtool.c | 34 ++++++++++++++++++++++++++
1 file changed, 34 insertions(+)
--- a/drivers/net/ethernet/google/gve/gve_ethtool.c
+++ b/drivers/net/ethernet/google/gve/gve_ethtool.c
@@ -230,6 +230,38 @@ static int gve_user_reset(struct net_dev
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,
};