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The firmware no longer supports setting a port MTU of zero bytes.

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Set the port MTU and then query it and report if any problems instead.

MFC after:	1 week
Submitted by:	Shahar Klein <shahark@mellanox.com>
Sponsored by:	Mellanox Technologies
Differential Revision:	https://reviews.freebsd.org/D4408
This commit is contained in:
hselasky 2015-12-07 10:57:42 +00:00
parent 314a714ed0
commit bc220e2f51
1 changed files with 4 additions and 21 deletions
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25
sys/dev/mlx5/mlx5_en/mlx5_en_main.c
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@ -2005,32 +2005,15 @@ mlx5e_set_dev_port_mtu(struct ifnet *ifp, int sw_mtu)
struct mlx5e_priv *priv = ifp->if_softc;
struct mlx5_core_dev *mdev = priv->mdev;
int hw_mtu;
int min_mtu;
int err;
/*
* Trying to set MTU to zero, in order
* to find out the FW's minimal MTU
*/
err = mlx5_set_port_mtu(mdev, 0);
if (err)
return (err);
err = mlx5_query_port_oper_mtu(mdev, &min_mtu);
if (err) {
if_printf(ifp, "Query port minimal MTU failed\n");
return (err);
}
if (sw_mtu < MLX5E_HW2SW_MTU(min_mtu)) {
ifp->if_mtu = sw_mtu;
return (0);
}
err = mlx5_set_port_mtu(mdev, MLX5E_SW2HW_MTU(sw_mtu));
if (err)
if (err) {
if_printf(ifp, "%s: mlx5_set_port_mtu failed setting %d, err=%d\n",
__func__, sw_mtu, err);
return (err);
}
err = mlx5_query_port_oper_mtu(mdev, &hw_mtu);
if (!err) {
ifp->if_mtu = MLX5E_HW2SW_MTU(hw_mtu);