Commit 470793a7 authored Feb 11, 2020 by Arthur Kiyanovski Committed by David S. Miller Feb 11, 2020

net: ena: make ena rxfh support ETH_RSS_HASH_NO_CHANGE



As the name suggests ETH_RSS_HASH_NO_CHANGE is received upon changing
the key or indirection table using ethtool while keeping the same hash
function.

Also add a function for retrieving the current hash function from
the ena-com layer.

Fixes: 1738cd3e ("net: ena: Add a driver for Amazon Elastic Network Adapters (ENA)")
Signed-off-by: Sameeh Jubran <sameehj@amazon.com>
Signed-off-by: Saeed Bshara <saeedb@amazon.com>
Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent e3f89f91

drivers/net/ethernet/amazon/ena/ena_com.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -1041,6 +1041,11 @@ static int ena_com_get_feature(struct ena_com_dev *ena_dev,
		feature_ver);
		}

		int ena_com_get_current_hash_function(struct ena_com_dev *ena_dev)
		{
		return ena_dev->rss.hash_func;
		}

		static void ena_com_hash_key_fill_default_key(struct ena_com_dev *ena_dev)
		{
		struct ena_admin_feature_rss_flow_hash_control *hash_key =

drivers/net/ethernet/amazon/ena/ena_com.h

+8 −0

Original line number	Diff line number	Diff line
		@@ -656,6 +656,14 @@ int ena_com_rss_init(struct ena_com_dev *ena_dev, u16 log_size);
		*/
		void ena_com_rss_destroy(struct ena_com_dev *ena_dev);

		/* ena_com_get_current_hash_function - Get RSS hash function
		* @ena_dev: ENA communication layer struct
		*
		* Return the current hash function.
		* @return: 0 or one of the ena_admin_hash_functions values.
		*/
		int ena_com_get_current_hash_function(struct ena_com_dev *ena_dev);

		/* ena_com_fill_hash_function - Fill RSS hash function
		* @ena_dev: ENA communication layer struct
		* @func: The hash function (Toeplitz or crc)

drivers/net/ethernet/amazon/ena/ena_ethtool.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -736,6 +736,9 @@ static int ena_set_rxfh(struct net_device netdev, const u32 indir,
		}

		switch (hfunc) {
		case ETH_RSS_HASH_NO_CHANGE:
		func = ena_com_get_current_hash_function(ena_dev);
		break;
		case ETH_RSS_HASH_TOP:
		func = ENA_ADMIN_TOEPLITZ;
		break;