diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
index 8c013a5213195ff99fb33a05b4506f67b7000bd0..d453a11f41fe9abb005ff2e658bd2d6273fb2ec8 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
@@ -250,9 +250,13 @@ static void mlx5e_fill_stats_strings(struct mlx5e_priv *priv, uint8_t *data)
 		strcpy(data + (idx++) * ETH_GSTRING_LEN,
 		       pcie_perf_stats_desc[i].format);
 
-	for (i = 0; i < NUM_PCIE_PERF_STALL_COUNTERS(priv); i++)
+	for (i = 0; i < NUM_PCIE_PERF_COUNTERS64(priv); i++)
 		strcpy(data + (idx++) * ETH_GSTRING_LEN,
-		       pcie_perf_stall_stats_desc[i].format);
+		       pcie_perf_stats_desc64[i].format);
+
+	for (i = 0; i < NUM_PCIE_PERF_STALL_COUNTERS(priv); i++)
+	 strcpy(data + (idx++) * ETH_GSTRING_LEN,
+		pcie_perf_stall_stats_desc[i].format);
 
 	for (prio = 0; prio < NUM_PPORT_PRIO; prio++) {
 		for (i = 0; i < NUM_PPORT_PER_PRIO_TRAFFIC_COUNTERS; i++)
@@ -389,6 +393,10 @@ void mlx5e_ethtool_get_ethtool_stats(struct mlx5e_priv *priv,
 		data[idx++] = MLX5E_READ_CTR32_BE(&priv->stats.pcie.pcie_perf_counters,
 						  pcie_perf_stats_desc, i);
 
+	for (i = 0; i < NUM_PCIE_PERF_COUNTERS64(priv); i++)
+		data[idx++] = MLX5E_READ_CTR64_BE(&priv->stats.pcie.pcie_perf_counters,
+						  pcie_perf_stats_desc64, i);
+
 	for (i = 0; i < NUM_PCIE_PERF_STALL_COUNTERS(priv); i++)
 		data[idx++] = MLX5E_READ_CTR32_BE(&priv->stats.pcie.pcie_perf_counters,
 						  pcie_perf_stall_stats_desc, i);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_stats.h b/drivers/net/ethernet/mellanox/mlx5/core/en_stats.h
index be49df4bedd9d6e70a909aa239828e9d55f352fd..40b5c73e5e269b4f37ea00a5e143e812882071f2 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_stats.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_stats.h
@@ -307,6 +307,12 @@ static const struct counter_desc pport_eth_ext_stats_desc[] = {
 	MLX5_GET(mpcnt_reg, (pcie_stats)->pcie_perf_counters, \
 		 counter_set.pcie_perf_cntrs_grp_data_layout.c)
 
+#define PCIE_PERF_OFF64(c) \
+	MLX5_BYTE_OFF(mpcnt_reg, counter_set.pcie_perf_cntrs_grp_data_layout.c##_high)
+#define PCIE_PERF_GET64(pcie_stats, c) \
+	MLX5_GET64(mpcnt_reg, (pcie_stats)->pcie_perf_counters, \
+		   counter_set.pcie_perf_cntrs_grp_data_layout.c##_high)
+
 struct mlx5e_pcie_stats {
 	__be64 pcie_perf_counters[MLX5_ST_SZ_QW(mpcnt_reg)];
 };
@@ -316,6 +322,10 @@ static const struct counter_desc pcie_perf_stats_desc[] = {
 	{ "tx_pci_signal_integrity", PCIE_PERF_OFF(tx_errors) },
 };
 
+static const struct counter_desc pcie_perf_stats_desc64[] = {
+	{ "outbound_pci_buffer_overflow", PCIE_PERF_OFF64(tx_overflow_buffer_pkt) },
+};
+
 static const struct counter_desc pcie_perf_stall_stats_desc[] = {
 	{ "outbound_pci_stalled_rd", PCIE_PERF_OFF(outbound_stalled_reads) },
 	{ "outbound_pci_stalled_wr", PCIE_PERF_OFF(outbound_stalled_writes) },
@@ -415,6 +425,9 @@ static const struct counter_desc sq_stats_desc[] = {
 #define NUM_PCIE_PERF_COUNTERS(priv) \
 	(ARRAY_SIZE(pcie_perf_stats_desc) * \
 	 MLX5_CAP_MCAM_FEATURE((priv)->mdev, pcie_performance_group))
+#define NUM_PCIE_PERF_COUNTERS64(priv) \
+	(ARRAY_SIZE(pcie_perf_stats_desc64) * \
+	 MLX5_CAP_MCAM_FEATURE((priv)->mdev, tx_overflow_buffer_pkt))
 #define NUM_PCIE_PERF_STALL_COUNTERS(priv) \
 	(ARRAY_SIZE(pcie_perf_stall_stats_desc) * \
 	 MLX5_CAP_MCAM_FEATURE((priv)->mdev, pcie_outbound_stalled))
@@ -433,6 +446,7 @@ static const struct counter_desc sq_stats_desc[] = {
 					 NUM_PPORT_PRIO + \
 					 NUM_PPORT_ETH_EXT_COUNTERS(priv))
 #define NUM_PCIE_COUNTERS(priv)		(NUM_PCIE_PERF_COUNTERS(priv) + \
+					 NUM_PCIE_PERF_COUNTERS64(priv) +\
 					 NUM_PCIE_PERF_STALL_COUNTERS(priv))
 #define NUM_RQ_STATS			ARRAY_SIZE(rq_stats_desc)
 #define NUM_SQ_STATS			ARRAY_SIZE(sq_stats_desc)
diff --git a/include/linux/mlx5/mlx5_ifc.h b/include/linux/mlx5/mlx5_ifc.h
index cf7ff52c594e9c263d9310827042678b7a122e9a..ae7d09b9c52f5d5aa52ea2f1b738262c037bb30f 100644
--- a/include/linux/mlx5/mlx5_ifc.h
+++ b/include/linux/mlx5/mlx5_ifc.h
@@ -1864,7 +1864,9 @@ struct mlx5_ifc_pcie_perf_cntrs_grp_data_layout_bits {
 
 	u8         crc_error_tlp[0x20];
 
-	u8         reserved_at_140[0x40];
+	u8         tx_overflow_buffer_pkt_high[0x20];
+
+	u8         tx_overflow_buffer_pkt_low[0x20];
 
 	u8         outbound_stalled_reads[0x20];
 
@@ -7767,7 +7769,7 @@ struct mlx5_ifc_pcam_reg_bits {
 struct mlx5_ifc_mcam_enhanced_features_bits {
 	u8         reserved_at_0[0x7b];
 	u8         pcie_outbound_stalled[0x1];
-	u8         reserved_at_7c[0x1];
+	u8         tx_overflow_buffer_pkt[0x1];
 	u8         mtpps_enh_out_per_adj[0x1];
 	u8         mtpps_fs[0x1];
 	u8         pcie_performance_group[0x1];