net/mlx5e: Expose port reset cycle recovery counter via ethtool

Display recovery event of PPCNT recovery counters group. Counts (per
link) the number of total successful recovery events of any recovery
types during port reset cycle.

Signed-off-by: Yael Chemla <ychemla@nvidia.com>
Reviewed-by: Cosmin Ratiu <cratiu@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://patch.msgid.link/1742112876-2890-5-git-send-email-tariqt@nvidia.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

2 files changed, 43 insertions, 5 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c b/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c
index a417962acfa9..acb00fd7efa4 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c
@@ -1250,12 +1250,22 @@ pport_phy_statistical_err_lanes_stats_desc[] = {
 	{ "rx_err_lane_3_phy", PPORT_PHY_STATISTICAL_OFF(phy_corrected_bits_lane3) },
 };
 
+#define PPORT_PHY_RECOVERY_OFF(c) \
+	MLX5_BYTE_OFF(ppcnt_reg, counter_set.phys_layer_recovery_cntrs.c)
+static const struct counter_desc
+pport_phy_recovery_cntrs_stats_desc[] = {
+	{ "total_success_recovery_phy",
+	  PPORT_PHY_RECOVERY_OFF(total_successful_recovery_events) }
+};
+
 #define NUM_PPORT_PHY_LAYER_COUNTERS \
 	ARRAY_SIZE(pport_phy_layer_cntrs_stats_desc)
 #define NUM_PPORT_PHY_STATISTICAL_COUNTERS \
 	ARRAY_SIZE(pport_phy_statistical_stats_desc)
 #define NUM_PPORT_PHY_STATISTICAL_PER_LANE_COUNTERS \
 	ARRAY_SIZE(pport_phy_statistical_err_lanes_stats_desc)
+#define NUM_PPORT_PHY_RECOVERY_COUNTERS \
+	ARRAY_SIZE(pport_phy_recovery_cntrs_stats_desc)
 
 #define NUM_PPORT_PHY_STATISTICAL_LOOPBACK_COUNTERS(dev) \
 	(MLX5_CAP_PCAM_FEATURE(dev, ppcnt_statistical_group) ? \
@@ -1263,6 +1273,9 @@ pport_phy_statistical_err_lanes_stats_desc[] = {
 #define NUM_PPORT_PHY_STATISTICAL_PER_LANE_LOOPBACK_COUNTERS(dev) \
 	(MLX5_CAP_PCAM_FEATURE(dev, per_lane_error_counters) ? \
 	NUM_PPORT_PHY_STATISTICAL_PER_LANE_COUNTERS : 0)
+#define NUM_PPORT_PHY_RECOVERY_LOOPBACK_COUNTERS(dev) \
+	(MLX5_CAP_PCAM_FEATURE(dev, ppcnt_recovery_counters) ? \
+	NUM_PPORT_PHY_RECOVERY_COUNTERS : 0)
 
 static MLX5E_DECLARE_STATS_GRP_OP_NUM_STATS(phy)
 {
@@ -1275,6 +1288,7 @@ static MLX5E_DECLARE_STATS_GRP_OP_NUM_STATS(phy)
 
 	num_stats += NUM_PPORT_PHY_STATISTICAL_PER_LANE_LOOPBACK_COUNTERS(mdev);
 
+	num_stats += NUM_PPORT_PHY_RECOVERY_LOOPBACK_COUNTERS(mdev);
 	return num_stats;
 }
 
@@ -1295,6 +1309,10 @@ static MLX5E_DECLARE_STATS_GRP_OP_FILL_STRS(phy)
 		ethtool_puts(data,
 			     pport_phy_statistical_err_lanes_stats_desc[i]
 			     .format);
+
+	for (i = 0; i < NUM_PPORT_PHY_RECOVERY_LOOPBACK_COUNTERS(mdev); i++)
+		ethtool_puts(data,
+			     pport_phy_recovery_cntrs_stats_desc[i].format);
 }
 
 static MLX5E_DECLARE_STATS_GRP_OP_FILL_STATS(phy)
@@ -1324,6 +1342,13 @@ static MLX5E_DECLARE_STATS_GRP_OP_FILL_STATS(phy)
 			MLX5E_READ_CTR64_BE(
 				&priv->stats.pport.phy_statistical_counters,
 				pport_phy_statistical_err_lanes_stats_desc, i));
+
+	for (i = 0; i < NUM_PPORT_PHY_RECOVERY_LOOPBACK_COUNTERS(mdev); i++)
+		mlx5e_ethtool_put_stat(
+			data,
+			MLX5E_READ_CTR32_BE(
+				&priv->stats.pport.phy_recovery_counters,
+				pport_phy_recovery_cntrs_stats_desc, i));
 }
 
 static MLX5E_DECLARE_STATS_GRP_OP_UPDATE_STATS(phy)
@@ -1339,12 +1364,21 @@ static MLX5E_DECLARE_STATS_GRP_OP_UPDATE_STATS(phy)
 	MLX5_SET(ppcnt_reg, in, grp, MLX5_PHYSICAL_LAYER_COUNTERS_GROUP);
 	mlx5_core_access_reg(mdev, in, sz, out, sz, MLX5_REG_PPCNT, 0, 0);
 
-	if (!MLX5_CAP_PCAM_FEATURE(mdev, ppcnt_statistical_group))
-		return;
+	if (MLX5_CAP_PCAM_FEATURE(mdev, ppcnt_statistical_group)) {
+		out = pstats->phy_statistical_counters;
+		MLX5_SET(ppcnt_reg, in, grp,
+			 MLX5_PHYSICAL_LAYER_STATISTICAL_GROUP);
+		mlx5_core_access_reg(mdev, in, sz, out, sz, MLX5_REG_PPCNT, 0,
+				     0);
+	}
 
-	out = pstats->phy_statistical_counters;
-	MLX5_SET(ppcnt_reg, in, grp, MLX5_PHYSICAL_LAYER_STATISTICAL_GROUP);
-	mlx5_core_access_reg(mdev, in, sz, out, sz, MLX5_REG_PPCNT, 0, 0);
+	if (MLX5_CAP_PCAM_FEATURE(mdev, ppcnt_recovery_counters)) {
+		out = pstats->phy_recovery_counters;
+		MLX5_SET(ppcnt_reg, in, grp,
+			 MLX5_PHYSICAL_LAYER_RECOVERY_GROUP);
+		mlx5_core_access_reg(mdev, in, sz, out, sz, MLX5_REG_PPCNT, 0,
+				     0);
+	}
 }
 
 void mlx5e_get_link_ext_stats(struct net_device *dev,
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_stats.h b/drivers/net/ethernet/mellanox/mlx5/core/en_stats.h
index 5961c569cfe0..0d87947e348d 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_stats.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_stats.h
@@ -309,6 +309,9 @@ struct mlx5e_vport_stats {
 #define PPORT_PHY_STATISTICAL_GET(pstats, c) \
 	MLX5_GET64(ppcnt_reg, (pstats)->phy_statistical_counters, \
 		   counter_set.phys_layer_statistical_cntrs.c##_high)
+#define PPORT_PHY_RECOVERY_GET(pstats, c) \
+	MLX5_GET64(ppcnt_reg, (pstats)->phy_recovery_counters, \
+		   counter_set.phys_layer_recovery_cntrs.c)
 #define PPORT_PER_PRIO_GET(pstats, prio, c) \
 	MLX5_GET64(ppcnt_reg, pstats->per_prio_counters[prio], \
 		   counter_set.eth_per_prio_grp_data_layout.c##_high)
@@ -324,6 +327,7 @@ struct mlx5e_pport_stats {
 	__be64 per_prio_counters[NUM_PPORT_PRIO][MLX5_ST_SZ_QW(ppcnt_reg)];
 	__be64 phy_counters[MLX5_ST_SZ_QW(ppcnt_reg)];
 	__be64 phy_statistical_counters[MLX5_ST_SZ_QW(ppcnt_reg)];
+	__be64 phy_recovery_counters[MLX5_ST_SZ_QW(ppcnt_reg)];
 	__be64 eth_ext_counters[MLX5_ST_SZ_QW(ppcnt_reg)];
 	__be64 per_tc_prio_counters[NUM_PPORT_PRIO][MLX5_ST_SZ_QW(ppcnt_reg)];
 	__be64 per_tc_congest_prio_counters[NUM_PPORT_PRIO][MLX5_ST_SZ_QW(ppcnt_reg)];