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net/mlx5e: Set FEC to auto when configured mode is not supported 

When configuring FEC mode, driver tries to set it for all available
link types. If a link type doesn't support a FEC mode, set this link
type to auto (FW best effort). Prior to this patch, when a link type
didn't support a FEC mode is was set to no FEC.

Signed-off-by: Aya Levin <ayal@mellanox.com>
Reviewed-by: Eran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Aya Levin 2020-02-11 14:32:48 -08:00 committed by Saeed Mahameed
parent b21aef7e71
commit 511aa2aa63
1 changed files with 6 additions and 16 deletions
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22
drivers/net/ethernet/mellanox/mlx5/core/en/port.c
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@ -501,8 +501,6 @@ int mlx5e_get_fec_mode(struct mlx5_core_dev *dev, u32 *fec_mode_active,
int mlx5e_set_fec_mode(struct mlx5_core_dev *dev, u8 fec_policy)
{
u8 fec_policy_nofec = BIT(MLX5E_FEC_NOFEC);
bool fec_mode_not_supp_in_speed = false;
u32 out[MLX5_ST_SZ_DW(pplm_reg)] = {};
u32 in[MLX5_ST_SZ_DW(pplm_reg)] = {};
int sz = MLX5_ST_SZ_BYTES(pplm_reg);
@ -526,23 +524,15 @@ int mlx5e_set_fec_mode(struct mlx5_core_dev *dev, u8 fec_policy)
for (i = 0; i < MLX5E_FEC_SUPPORTED_SPEEDS; i++) {
mlx5e_get_fec_cap_field(out, &fec_caps, fec_supported_speeds[i]);
/* policy supported for link speed, or policy is auto */
if (fec_caps & fec_policy || fec_policy == fec_policy_auto) {
/* policy supported for link speed */
if (fec_caps & fec_policy)
mlx5e_fec_admin_field(out, &fec_policy, 1,
fec_supported_speeds[i]);
} else {
/* turn off FEC if supported. Else, leave it the same */
if (fec_caps & fec_policy_nofec)
mlx5e_fec_admin_field(out, &fec_policy_nofec, 1,
fec_supported_speeds[i]);
fec_mode_not_supp_in_speed = true;
}
else
/* set FEC to auto*/
mlx5e_fec_admin_field(out, &fec_policy_auto, 1,
fec_supported_speeds[i]);
}
if (fec_mode_not_supp_in_speed)
mlx5_core_dbg(dev,
"FEC policy 0x%x is not supported for some speeds",
fec_policy);
return mlx5_core_access_reg(dev, out, sz, out, sz, MLX5_REG_PPLM, 0, 1);
}