[dpdk-dev] [PATCH] net/mlx5: add supported hash function check

[Xueming Li <xuemingl@mellanox.com>]

Add supported RSS hash function check in device configuration to
have better error verbosity for application developers.

Signed-off-by: Xueming Li <xuemingl@mellanox.com>
---
 drivers/net/mlx5/mlx5_ethdev.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/net/mlx5/mlx5_ethdev.c b/drivers/net/mlx5/mlx5_ethdev.c
index b73cb53..175a1ff 100644
--- a/drivers/net/mlx5/mlx5_ethdev.c
+++ b/drivers/net/mlx5/mlx5_ethdev.c
@@ -346,6 +346,14 @@ struct ethtool_link_settings {
 		      rx_offloads, supp_rx_offloads);
 		return ENOTSUP;
 	}
+	if (dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf &
+	    MLX5_RSS_HF_MASK) {
+		ERROR("Some RSS hash function not supported "
+		      "requested 0x%" PRIx64 " supported 0x%" PRIx64,
+		      dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf,
+		      (uint64_t)(~MLX5_RSS_HF_MASK));
+		return ENOTSUP;
+	}
 	if (use_app_rss_key &&
 	    (dev->data->dev_conf.rx_adv_conf.rss_conf.rss_key_len !=
 	     rss_hash_default_key_len)) {
-- 
1.8.3.1