[SRU][N:linux-bluefield][PATCH v1 7/8] net/mlx5e: Support FEC settings for 200G per lane link modes
Stav Aviram
saviram at nvidia.com
Wed Oct 29 13:20:29 UTC 2025
From: Jianbo Liu <jianbol at nvidia.com>
BugLink: https://bugs.launchpad.net/bugs/2130222
Add support to show and config FEC by ethtool for 200G/lane link
modes. The RS encoding setting is mapped, and can be overridden to
FEC_RS_544_514_INTERLEAVED_QUAD for these modes.
Signed-off-by: Jianbo Liu <jianbol at nvidia.com>
Reviewed-by: Shahar Shitrit <shshitrit at nvidia.com>
Signed-off-by: Tariq Toukan <tariqt at nvidia.com>
Signed-off-by: Paolo Abeni <pabeni at redhat.com>
(cherry picked from commit 4e343c11efbbc9da8ac6e1a2f23704c9313e056d)
Signed-off-by: Stav Aviram <saviram at nvidia.com>
---
.../net/ethernet/mellanox/mlx5/core/en/port.c | 64 ++++++++++++++++---
.../net/ethernet/mellanox/mlx5/core/en/port.h | 1 +
.../ethernet/mellanox/mlx5/core/en_ethtool.c | 1 +
3 files changed, 56 insertions(+), 10 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/port.c b/drivers/net/ethernet/mellanox/mlx5/core/en/port.c
index b4efc780e297..c46f4bf41e30 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/port.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/port.c
@@ -296,11 +296,16 @@ enum mlx5e_fec_supported_link_mode {
MLX5E_FEC_SUPPORTED_LINK_MODE_200G_2X,
MLX5E_FEC_SUPPORTED_LINK_MODE_400G_4X,
MLX5E_FEC_SUPPORTED_LINK_MODE_800G_8X,
+ MLX5E_FEC_SUPPORTED_LINK_MODE_200G_1X,
+ MLX5E_FEC_SUPPORTED_LINK_MODE_400G_2X,
+ MLX5E_FEC_SUPPORTED_LINK_MODE_800G_4X,
+ MLX5E_FEC_SUPPORTED_LINK_MODE_1600G_8X,
MLX5E_MAX_FEC_SUPPORTED_LINK_MODE,
};
#define MLX5E_FEC_FIRST_50G_PER_LANE_MODE MLX5E_FEC_SUPPORTED_LINK_MODE_50G_1X
#define MLX5E_FEC_FIRST_100G_PER_LANE_MODE MLX5E_FEC_SUPPORTED_LINK_MODE_100G_1X
+#define MLX5E_FEC_FIRST_200G_PER_LANE_MODE MLX5E_FEC_SUPPORTED_LINK_MODE_200G_1X
#define MLX5E_FEC_OVERRIDE_ADMIN_POLICY(buf, policy, write, link) \
do { \
@@ -320,8 +325,10 @@ static bool mlx5e_is_fec_supported_link_mode(struct mlx5_core_dev *dev,
return link_mode < MLX5E_FEC_FIRST_50G_PER_LANE_MODE ||
(link_mode < MLX5E_FEC_FIRST_100G_PER_LANE_MODE &&
MLX5_CAP_PCAM_FEATURE(dev, fec_50G_per_lane_in_pplm)) ||
- (link_mode >= MLX5E_FEC_FIRST_100G_PER_LANE_MODE &&
- MLX5_CAP_PCAM_FEATURE(dev, fec_100G_per_lane_in_pplm));
+ (link_mode < MLX5E_FEC_FIRST_200G_PER_LANE_MODE &&
+ MLX5_CAP_PCAM_FEATURE(dev, fec_100G_per_lane_in_pplm)) ||
+ (link_mode >= MLX5E_FEC_FIRST_200G_PER_LANE_MODE &&
+ MLX5_CAP_PCAM_FEATURE(dev, fec_200G_per_lane_in_pplm));
}
/* get/set FEC admin field for a given speed */
@@ -368,6 +375,18 @@ static int mlx5e_fec_admin_field(u32 *pplm, u16 *fec_policy, bool write,
case MLX5E_FEC_SUPPORTED_LINK_MODE_800G_8X:
MLX5E_FEC_OVERRIDE_ADMIN_POLICY(pplm, *fec_policy, write, 800g_8x);
break;
+ case MLX5E_FEC_SUPPORTED_LINK_MODE_200G_1X:
+ MLX5E_FEC_OVERRIDE_ADMIN_POLICY(pplm, *fec_policy, write, 200g_1x);
+ break;
+ case MLX5E_FEC_SUPPORTED_LINK_MODE_400G_2X:
+ MLX5E_FEC_OVERRIDE_ADMIN_POLICY(pplm, *fec_policy, write, 400g_2x);
+ break;
+ case MLX5E_FEC_SUPPORTED_LINK_MODE_800G_4X:
+ MLX5E_FEC_OVERRIDE_ADMIN_POLICY(pplm, *fec_policy, write, 800g_4x);
+ break;
+ case MLX5E_FEC_SUPPORTED_LINK_MODE_1600G_8X:
+ MLX5E_FEC_OVERRIDE_ADMIN_POLICY(pplm, *fec_policy, write, 1600g_8x);
+ break;
default:
return -EINVAL;
}
@@ -421,6 +440,18 @@ static int mlx5e_get_fec_cap_field(u32 *pplm, u16 *fec_cap,
case MLX5E_FEC_SUPPORTED_LINK_MODE_800G_8X:
*fec_cap = MLX5E_GET_FEC_OVERRIDE_CAP(pplm, 800g_8x);
break;
+ case MLX5E_FEC_SUPPORTED_LINK_MODE_200G_1X:
+ *fec_cap = MLX5E_GET_FEC_OVERRIDE_CAP(pplm, 200g_1x);
+ break;
+ case MLX5E_FEC_SUPPORTED_LINK_MODE_400G_2X:
+ *fec_cap = MLX5E_GET_FEC_OVERRIDE_CAP(pplm, 400g_2x);
+ break;
+ case MLX5E_FEC_SUPPORTED_LINK_MODE_800G_4X:
+ *fec_cap = MLX5E_GET_FEC_OVERRIDE_CAP(pplm, 800g_4x);
+ break;
+ case MLX5E_FEC_SUPPORTED_LINK_MODE_1600G_8X:
+ *fec_cap = MLX5E_GET_FEC_OVERRIDE_CAP(pplm, 1600g_8x);
+ break;
default:
return -EINVAL;
}
@@ -494,6 +525,26 @@ int mlx5e_get_fec_mode(struct mlx5_core_dev *dev, u32 *fec_mode_active,
return 0;
}
+static u16 mlx5e_remap_fec_conf_mode(enum mlx5e_fec_supported_link_mode link_mode,
+ u16 conf_fec)
+{
+ /* RS fec in ethtool is originally mapped to MLX5E_FEC_RS_528_514.
+ * For link modes up to 25G per lane, the value is kept.
+ * For 50G or 100G per lane, it's remapped to MLX5E_FEC_RS_544_514.
+ * For 200G per lane, remapped to MLX5E_FEC_RS_544_514_INTERLEAVED_QUAD.
+ */
+ if (conf_fec != BIT(MLX5E_FEC_RS_528_514))
+ return conf_fec;
+
+ if (link_mode >= MLX5E_FEC_FIRST_200G_PER_LANE_MODE)
+ return BIT(MLX5E_FEC_RS_544_514_INTERLEAVED_QUAD);
+
+ if (link_mode >= MLX5E_FEC_FIRST_50G_PER_LANE_MODE)
+ return BIT(MLX5E_FEC_RS_544_514);
+
+ return conf_fec;
+}
+
int mlx5e_set_fec_mode(struct mlx5_core_dev *dev, u16 fec_policy)
{
bool fec_50g_per_lane = MLX5_CAP_PCAM_FEATURE(dev, fec_50G_per_lane_in_pplm);
@@ -530,14 +581,7 @@ int mlx5e_set_fec_mode(struct mlx5_core_dev *dev, u16 fec_policy)
if (!mlx5e_is_fec_supported_link_mode(dev, i))
break;
- /* RS fec in ethtool is mapped to MLX5E_FEC_RS_528_514
- * to link modes up to 25G per lane and to
- * MLX5E_FEC_RS_544_514 in the new link modes based on
- * 50G or 100G per lane
- */
- if (conf_fec == (1 << MLX5E_FEC_RS_528_514) &&
- i >= MLX5E_FEC_FIRST_50G_PER_LANE_MODE)
- conf_fec = (1 << MLX5E_FEC_RS_544_514);
+ conf_fec = mlx5e_remap_fec_conf_mode(i, conf_fec);
mlx5e_get_fec_cap_field(out, &fec_caps, i);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/port.h b/drivers/net/ethernet/mellanox/mlx5/core/en/port.h
index d1da225f35da..fa2283dd383b 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/port.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/port.h
@@ -61,6 +61,7 @@ enum {
MLX5E_FEC_NOFEC,
MLX5E_FEC_FIRECODE,
MLX5E_FEC_RS_528_514,
+ MLX5E_FEC_RS_544_514_INTERLEAVED_QUAD = 4,
MLX5E_FEC_RS_544_514 = 7,
MLX5E_FEC_LLRS_272_257_1 = 9,
};
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
index 0021a80bd6b3..ca4e828f8cb4 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
@@ -800,6 +800,7 @@ static const u32 pplm_fec_2_ethtool[] = {
[MLX5E_FEC_RS_528_514] = ETHTOOL_FEC_RS,
[MLX5E_FEC_RS_544_514] = ETHTOOL_FEC_RS,
[MLX5E_FEC_LLRS_272_257_1] = ETHTOOL_FEC_LLRS,
+ [MLX5E_FEC_RS_544_514_INTERLEAVED_QUAD] = ETHTOOL_FEC_RS,
};
static u32 pplm2ethtool_fec(u_long fec_mode, unsigned long size)
--
2.34.1
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