diff options
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c | 45 |
1 files changed, 43 insertions, 2 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c index cc51ce16df14a..8f101181648c6 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c @@ -451,6 +451,34 @@ int mlx5e_ethtool_set_channels(struct mlx5e_priv *priv, mutex_lock(&priv->state_lock); + if (mlx5e_rx_res_get_current_hash(priv->rx_res).hfunc == ETH_RSS_HASH_XOR) { + unsigned int xor8_max_channels = mlx5e_rqt_max_num_channels_allowed_for_xor8(); + + if (count > xor8_max_channels) { + err = -EINVAL; + netdev_err(priv->netdev, "%s: Requested number of channels (%d) exceeds the maximum allowed by the XOR8 RSS hfunc (%d)\n", + __func__, count, xor8_max_channels); + goto out; + } + } + + /* If RXFH is configured, changing the channels number is allowed only if + * it does not require resizing the RSS table. This is because the previous + * configuration may no longer be compatible with the new RSS table. + */ + if (netif_is_rxfh_configured(priv->netdev)) { + int cur_rqt_size = mlx5e_rqt_size(priv->mdev, cur_params->num_channels); + int new_rqt_size = mlx5e_rqt_size(priv->mdev, count); + + if (new_rqt_size != cur_rqt_size) { + err = -EINVAL; + netdev_err(priv->netdev, + "%s: RXFH is configured, block changing channels number that affects RSS table size (new: %d, current: %d)\n", + __func__, new_rqt_size, cur_rqt_size); + goto out; + } + } + /* Don't allow changing the number of channels if HTB offload is active, * because the numeration of the QoS SQs will change, while per-queue * qdiscs are attached. @@ -1281,17 +1309,30 @@ int mlx5e_set_rxfh(struct net_device *dev, struct ethtool_rxfh_param *rxfh, struct mlx5e_priv *priv = netdev_priv(dev); u32 *rss_context = &rxfh->rss_context; u8 hfunc = rxfh->hfunc; + unsigned int count; int err; mutex_lock(&priv->state_lock); + + count = priv->channels.params.num_channels; + + if (hfunc == ETH_RSS_HASH_XOR) { + unsigned int xor8_max_channels = mlx5e_rqt_max_num_channels_allowed_for_xor8(); + + if (count > xor8_max_channels) { + err = -EINVAL; + netdev_err(priv->netdev, "%s: Cannot set RSS hash function to XOR, current number of channels (%d) exceeds the maximum allowed for XOR8 RSS hfunc (%d)\n", + __func__, count, xor8_max_channels); + goto unlock; + } + } + if (*rss_context && rxfh->rss_delete) { err = mlx5e_rx_res_rss_destroy(priv->rx_res, *rss_context); goto unlock; } if (*rss_context == ETH_RXFH_CONTEXT_ALLOC) { - unsigned int count = priv->channels.params.num_channels; - err = mlx5e_rx_res_rss_init(priv->rx_res, rss_context, count); if (err) goto unlock; |