[dpdk-dev] [PATCH 2/3] net/mlx5: use correct RETA table size

[Yongseok Koh]

When querying and updating RSS RETA table, it always uses the max size of
the device instead of configured value. This patch fixes it and removed the
related comments in the code.

Signed-off-by: Yongseok Koh <yskoh at mellanox.com>
---
 drivers/net/mlx5/mlx5_ethdev.c |  8 ++------
 drivers/net/mlx5/mlx5_rss.c    | 13 +++++--------
 2 files changed, 7 insertions(+), 14 deletions(-)

diff --git a/drivers/net/mlx5/mlx5_ethdev.c b/drivers/net/mlx5/mlx5_ethdev.c
index dd5fe5c1f..0578b11e4 100644
--- a/drivers/net/mlx5/mlx5_ethdev.c
+++ b/drivers/net/mlx5/mlx5_ethdev.c
@@ -701,12 +701,8 @@ mlx5_dev_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *info)
 					  DEV_TX_OFFLOAD_GRE_TNL_TSO);
 	if (priv_get_ifname(priv, &ifname) == 0)
 		info->if_index = if_nametoindex(ifname);
-	/* FIXME: RETA update/query API expects the callee to know the size of
-	 * the indirection table, for this PMD the size varies depending on
-	 * the number of RX queues, it becomes impossible to find the correct
-	 * size if it is not fixed.
-	 * The API should be updated to solve this problem. */
-	info->reta_size = priv->ind_table_max_size;
+	info->reta_size = priv->reta_idx_n ?
+		priv->reta_idx_n : priv->ind_table_max_size;
 	info->hash_key_size = ((*priv->rss_conf) ?
 			       (*priv->rss_conf)[0]->rss_key_len :
 			       0);
diff --git a/drivers/net/mlx5/mlx5_rss.c b/drivers/net/mlx5/mlx5_rss.c
index 0bed74eeb..0702f1a63 100644
--- a/drivers/net/mlx5/mlx5_rss.c
+++ b/drivers/net/mlx5/mlx5_rss.c
@@ -257,13 +257,9 @@ priv_dev_rss_reta_query(struct priv *priv,
 {
 	unsigned int idx;
 	unsigned int i;
-	int ret;
-
-	/* See RETA comment in mlx5_dev_infos_get(). */
-	ret = priv_rss_reta_index_resize(priv, priv->ind_table_max_size);
-	if (ret)
-		return ret;
 
+	if (!reta_size || reta_size > priv->reta_idx_n)
+		return EINVAL;
 	/* Fill each entry of the table even if its bit is not set. */
 	for (idx = 0, i = 0; (i != reta_size); ++i) {
 		idx = i / RTE_RETA_GROUP_SIZE;
@@ -296,8 +292,9 @@ priv_dev_rss_reta_update(struct priv *priv,
 	unsigned int pos;
 	int ret;
 
-	/* See RETA comment in mlx5_dev_infos_get(). */
-	ret = priv_rss_reta_index_resize(priv, priv->ind_table_max_size);
+	if (!reta_size)
+		return EINVAL;
+	ret = priv_rss_reta_index_resize(priv, reta_size);
 	if (ret)
 		return ret;
 
-- 
2.11.0