amd-xgbe: Add receive side scaling ethtool support
This patch adds support for ethtool receive side scaling (RSS) commands.
Support is added to get/set the RSS hash key and the RSS lookup table.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
index 47022fb..95d4453 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
@@ -481,6 +481,75 @@
return 0;
}
+static int xgbe_get_rxnfc(struct net_device *netdev,
+ struct ethtool_rxnfc *rxnfc, u32 *rule_locs)
+{
+ struct xgbe_prv_data *pdata = netdev_priv(netdev);
+
+ switch (rxnfc->cmd) {
+ case ETHTOOL_GRXRINGS:
+ rxnfc->data = pdata->rx_ring_count;
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ return 0;
+}
+
+static u32 xgbe_get_rxfh_key_size(struct net_device *netdev)
+{
+ struct xgbe_prv_data *pdata = netdev_priv(netdev);
+
+ return sizeof(pdata->rss_key);
+}
+
+static u32 xgbe_get_rxfh_indir_size(struct net_device *netdev)
+{
+ struct xgbe_prv_data *pdata = netdev_priv(netdev);
+
+ return ARRAY_SIZE(pdata->rss_table);
+}
+
+static int xgbe_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key)
+{
+ struct xgbe_prv_data *pdata = netdev_priv(netdev);
+ unsigned int i;
+
+ if (indir) {
+ for (i = 0; i < ARRAY_SIZE(pdata->rss_table); i++)
+ indir[i] = XGMAC_GET_BITS(pdata->rss_table[i],
+ MAC_RSSDR, DMCH);
+ }
+
+ if (key)
+ memcpy(key, pdata->rss_key, sizeof(pdata->rss_key));
+
+ return 0;
+}
+
+static int xgbe_set_rxfh(struct net_device *netdev, const u32 *indir,
+ const u8 *key)
+{
+ struct xgbe_prv_data *pdata = netdev_priv(netdev);
+ struct xgbe_hw_if *hw_if = &pdata->hw_if;
+ unsigned int ret;
+
+ if (indir) {
+ ret = hw_if->set_rss_lookup_table(pdata, indir);
+ if (ret)
+ return ret;
+ }
+
+ if (key) {
+ ret = hw_if->set_rss_hash_key(pdata, key);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
static int xgbe_get_ts_info(struct net_device *netdev,
struct ethtool_ts_info *ts_info)
{
@@ -526,6 +595,11 @@
.get_strings = xgbe_get_strings,
.get_ethtool_stats = xgbe_get_ethtool_stats,
.get_sset_count = xgbe_get_sset_count,
+ .get_rxnfc = xgbe_get_rxnfc,
+ .get_rxfh_key_size = xgbe_get_rxfh_key_size,
+ .get_rxfh_indir_size = xgbe_get_rxfh_indir_size,
+ .get_rxfh = xgbe_get_rxfh,
+ .set_rxfh = xgbe_set_rxfh,
.get_ts_info = xgbe_get_ts_info,
};