From: Saeed Mahameed <saeedm@mellanox.com>
To: "David S. Miller" <davem@davemloft.net>
Cc: netdev@vger.kernel.org, Moshe Shemesh <moshe@mellanox.com>,
Saeed Mahameed <saeedm@mellanox.com>
Subject: [net 4/8] net/mlx5e: Verify coalescing parameters in range
Date: Fri, 23 Mar 2018 15:05:30 -0700 [thread overview]
Message-ID: <20180323220534.19353-5-saeedm@mellanox.com> (raw)
In-Reply-To: <20180323220534.19353-1-saeedm@mellanox.com>
From: Moshe Shemesh <moshe@mellanox.com>
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 <moshe@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
---
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
next prev parent reply other threads:[~2018-03-23 22:24 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-23 22:05 [pull request][net 0/8] Mellanox, mlx5 fixes 2018-03-23 Saeed Mahameed
2018-03-23 22:05 ` [net 1/8] net/mlx5e: Don't override vport admin link state in switchdev mode Saeed Mahameed
2018-03-23 22:05 ` [net 2/8] net/mlx5e: Use 32 bits to store VF representor SQ number Saeed Mahameed
2018-03-23 22:05 ` [net 3/8] net/mlx5: Make eswitch support to depend on switchdev Saeed Mahameed
2018-03-23 22:05 ` Saeed Mahameed [this message]
2018-03-23 22:05 ` [net 5/8] net/mlx5e: Fix traffic being dropped on VF representor Saeed Mahameed
2018-03-23 22:05 ` [net 6/8] net/mlx5e: Fix memory usage issues in offloading TC flows Saeed Mahameed
2018-03-23 22:05 ` [net 7/8] net/mlx5e: Avoid using the ipv6 stub in the TC offload neigh update path Saeed Mahameed
2018-03-24 9:52 ` Sergei Shtylyov
2018-03-23 22:05 ` [net 8/8] net/mlx5e: Sync netdev vxlan ports at open Saeed Mahameed
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