From: Arthur Kiyanovski <akiyano@xxxxxxxxxx>
commit 470793a78ce344bd53d31e0c2d537f71ba957547 upstream.
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: 1738cd3ed342 ("net: ena: Add a driver for Amazon Elastic Network Adapters (ENA)")
Signed-off-by: Sameeh Jubran <sameehj@xxxxxxxxxx>
Signed-off-by: Saeed Bshara <saeedb@xxxxxxxxxx>
Signed-off-by: Arthur Kiyanovski <akiyano@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/amazon/ena/ena_com.c | 5 +++++
drivers/net/ethernet/amazon/ena/ena_com.h | 8 ++++++++
drivers/net/ethernet/amazon/ena/ena_ethtool.c | 3 +++
3 files changed, 16 insertions(+)
--- a/drivers/net/ethernet/amazon/ena/ena_com.c
+++ b/drivers/net/ethernet/amazon/ena/ena_com.c
@@ -860,6 +860,11 @@ static void ena_com_hash_key_fill_defaul
hash_key->keys_num = sizeof(hash_key->key) / sizeof(u32);
}
+int ena_com_get_current_hash_function(struct ena_com_dev *ena_dev)
+{
+ return ena_dev->rss.hash_func;
+}
+
static int ena_com_hash_key_allocate(struct ena_com_dev *ena_dev)
{
struct ena_rss *rss = &ena_dev->rss;
--- a/drivers/net/ethernet/amazon/ena/ena_com.h
+++ b/drivers/net/ethernet/amazon/ena/ena_com.h
@@ -632,6 +632,14 @@ int ena_com_rss_init(struct ena_com_dev
*/
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)
--- a/drivers/net/ethernet/amazon/ena/ena_ethtool.c
+++ b/drivers/net/ethernet/amazon/ena/ena_ethtool.c
@@ -749,6 +749,9 @@ static int ena_set_rxfh(struct net_devic
}
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;
