From: Moshe Shemesh <[email protected]>
Add check of coalescing parameters received through ethtool are within
range of values supported by the HW.
Driver gets the coalescing rx/tx-usecs and rx/tx-frames as set by the
users through ethtool. The ethtool support up to 32 bit value for each.
However, mlx5 modify cq limits the coalescing time parameter to 12 bit
and coalescing frames parameters to 16 bits.
Return out of range error if user tries to set these parameters to
higher values.
Fixes: f62b8bb8f2d3 ('net/mlx5: Extend mlx5_core to support ConnectX-4 Ethernet
functionality')
Signed-off-by: Moshe Shemesh <[email protected]>
Signed-off-by: Saeed Mahameed <[email protected]>
---
drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
index cc8048f68f11..59ebfdae6695 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
@@ -477,6 +477,9 @@ static int mlx5e_get_coalesce(struct net_device *netdev,
return mlx5e_ethtool_get_coalesce(priv, coal);
}
+#define MLX5E_MAX_COAL_TIME MLX5_MAX_CQ_PERIOD
+#define MLX5E_MAX_COAL_FRAMES MLX5_MAX_CQ_COUNT
+
static void
mlx5e_set_priv_channels_coalesce(struct mlx5e_priv *priv, struct
ethtool_coalesce *coal)
{
@@ -511,6 +514,20 @@ int mlx5e_ethtool_set_coalesce(struct mlx5e_priv *priv,
if (!MLX5_CAP_GEN(mdev, cq_moderation))
return -EOPNOTSUPP;
+ if (coal->tx_coalesce_usecs > MLX5E_MAX_COAL_TIME ||
+ coal->rx_coalesce_usecs > MLX5E_MAX_COAL_TIME) {
+ netdev_info(priv->netdev, "%s: maximum coalesce time supported
is %lu usecs\n",
+ __func__, MLX5E_MAX_COAL_TIME);
+ return -ERANGE;
+ }
+
+ if (coal->tx_max_coalesced_frames > MLX5E_MAX_COAL_FRAMES ||
+ coal->rx_max_coalesced_frames > MLX5E_MAX_COAL_FRAMES) {
+ netdev_info(priv->netdev, "%s: maximum coalesced frames
supported is %lu\n",
+ __func__, MLX5E_MAX_COAL_FRAMES);
+ return -ERANGE;
+ }
+
mutex_lock(&priv->state_lock);
new_channels.params = priv->channels.params;
--
2.14.3
