| From dc99faccc4a0c8299cb70b250f7838622091f68d Mon Sep 17 00:00:00 2001 |
| From: Arthur Kiyanovski <akiyano@amazon.com> |
| Date: Tue, 11 Feb 2020 15:17:49 +0000 |
| Subject: [PATCH] net: ena: make ena rxfh support ETH_RSS_HASH_NO_CHANGE |
| |
| 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@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> |
| Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> |
| |
| diff --git a/drivers/net/ethernet/amazon/ena/ena_com.c b/drivers/net/ethernet/amazon/ena/ena_com.c |
| index 1729b8daaeb5..a732611ac466 100644 |
| --- a/drivers/net/ethernet/amazon/ena/ena_com.c |
| +++ b/drivers/net/ethernet/amazon/ena/ena_com.c |
| @@ -1026,6 +1026,11 @@ static int ena_com_get_feature(struct ena_com_dev *ena_dev, |
| 0); |
| } |
| |
| +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 = |
| diff --git a/drivers/net/ethernet/amazon/ena/ena_com.h b/drivers/net/ethernet/amazon/ena/ena_com.h |
| index 947540837df3..fb383400f271 100644 |
| --- a/drivers/net/ethernet/amazon/ena/ena_com.h |
| +++ b/drivers/net/ethernet/amazon/ena/ena_com.h |
| @@ -669,6 +669,14 @@ 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) |
| diff --git a/drivers/net/ethernet/amazon/ena/ena_ethtool.c b/drivers/net/ethernet/amazon/ena/ena_ethtool.c |
| index 8f8331971f26..a44e8e0299c9 100644 |
| --- a/drivers/net/ethernet/amazon/ena/ena_ethtool.c |
| +++ b/drivers/net/ethernet/amazon/ena/ena_ethtool.c |
| @@ -751,6 +751,9 @@ 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; |
| -- |
| 2.7.4 |
| |