netvsc: add ethtool ops to get/set RSS key
For some cases it is useful to be able to change RSS key value.
For example, replacing RSS key with a symmetric hash.
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index 6ab8b52..40a8838 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -1059,6 +1059,48 @@
}
#endif
+static u32 netvsc_get_rxfh_key_size(struct net_device *dev)
+{
+ return NETVSC_HASH_KEYLEN;
+}
+
+static u32 netvsc_rss_indir_size(struct net_device *dev)
+{
+ return 0;
+}
+
+static int netvsc_get_rxfh(struct net_device *dev, u32 *indir, u8 *key,
+ u8 *hfunc)
+{
+ struct net_device_context *ndc = netdev_priv(dev);
+ struct netvsc_device *ndev = ndc->nvdev;
+ struct rndis_device *rndis_dev = ndev->extension;
+
+ if (hfunc)
+ *hfunc = ETH_RSS_HASH_TOP; /* Toeplitz */
+
+ if (key)
+ memcpy(key, rndis_dev->rss_key, NETVSC_HASH_KEYLEN);
+
+ return 0;
+}
+
+static int netvsc_set_rxfh(struct net_device *dev, const u32 *indir,
+ const u8 *key, const u8 hfunc)
+{
+ struct net_device_context *ndc = netdev_priv(dev);
+ struct netvsc_device *ndev = ndc->nvdev;
+ struct rndis_device *rndis_dev = ndev->extension;
+
+ if (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP)
+ return -EOPNOTSUPP;
+
+ if (!key || memcmp(key, rndis_dev->rss_key, NETVSC_HASH_KEYLEN) == 0)
+ return 0; /* no change */
+
+ return rndis_filter_set_rss_param(rndis_dev, key, ndev->num_chn);
+}
+
static const struct ethtool_ops ethtool_ops = {
.get_drvinfo = netvsc_get_drvinfo,
.get_link = ethtool_op_get_link,
@@ -1071,6 +1113,10 @@
.get_settings = netvsc_get_settings,
.set_settings = netvsc_set_settings,
.get_rxnfc = netvsc_get_rxnfc,
+ .get_rxfh_key_size = netvsc_get_rxfh_key_size,
+ .get_rxfh_indir_size = netvsc_rss_indir_size,
+ .get_rxfh = netvsc_get_rxfh,
+ .set_rxfh = netvsc_set_rxfh,
};
static const struct net_device_ops device_ops = {