net/mlx5e: Add statistics for Rx/Tx IPsec offloaded flows

Add the following statistics:
RX successfully IPsec flows:
ipsec_rx_pkts  : Number of packets passed Rx IPsec flow
ipsec_rx_bytes : Number of bytes passed Rx IPsec flow

Rx dropped IPsec policy packets:
ipsec_rx_drop_pkts: Number of packets dropped in Rx datapath due to IPsec drop policy
ipsec_rx_drop_bytes: Number of bytes dropped in Rx datapath due to IPsec drop policy

TX successfully encrypted and encapsulated IPsec packets:
ipsec_tx_pkts  : Number of packets encrypted and encapsulated successfully
ipsec_tx_bytes : Number of bytes encrypted and encapsulated successfully

Tx dropped IPsec policy packets:
ipsec_tx_drop_pkts: Number of packets dropped in Tx datapath due to IPsec drop policy
ipsec_tx_drop_bytes: Number of bytes dropped in Tx datapath due to IPsec drop policy

The above can be seen using:
ethtool -S <ifc> |grep ipsec
Signed-off-by: Raed Salem <raeds@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>

drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.h

@@ -87,6 +87,17 @@ enum mlx5_ipsec_cap {
 
 struct mlx5e_priv;
 
+struct mlx5e_ipsec_hw_stats {
+	u64 ipsec_rx_pkts;
+	u64 ipsec_rx_bytes;
+	u64 ipsec_rx_drop_pkts;
+	u64 ipsec_rx_drop_bytes;
+	u64 ipsec_tx_pkts;
+	u64 ipsec_tx_bytes;
+	u64 ipsec_tx_drop_pkts;
+	u64 ipsec_tx_drop_bytes;
+};
+
 struct mlx5e_ipsec_sw_stats {
 	atomic64_t ipsec_rx_drop_sp_alloc;
 	atomic64_t ipsec_rx_drop_sadb_miss;
@@ -111,6 +122,7 @@ struct mlx5e_ipsec {
 	DECLARE_HASHTABLE(sadb_rx, MLX5E_IPSEC_SADB_RX_BITS);
 	spinlock_t sadb_rx_lock; /* Protects sadb_rx */
 	struct mlx5e_ipsec_sw_stats sw_stats;
+	struct mlx5e_ipsec_hw_stats hw_stats;
 	struct workqueue_struct *wq;
 	struct mlx5e_flow_steering *fs;
 	struct mlx5e_ipsec_rx *rx_ipv4;
@@ -200,6 +212,9 @@ void mlx5_accel_esp_modify_xfrm(struct mlx5e_ipsec_sa_entry *sa_entry,
 int mlx5e_ipsec_aso_init(struct mlx5e_ipsec *ipsec);
 void mlx5e_ipsec_aso_cleanup(struct mlx5e_ipsec *ipsec);
 
+void mlx5e_accel_ipsec_fs_read_stats(struct mlx5e_priv *priv,
+				     void *ipsec_stats);
+
 static inline struct mlx5_core_dev *
 mlx5e_ipsec_sa2dev(struct mlx5e_ipsec_sa_entry *sa_entry)
 {

drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_stats.c

@@ -37,6 +37,17 @@
 #include "en.h"
 #include "ipsec.h"
 
+static const struct counter_desc mlx5e_ipsec_hw_stats_desc[] = {
+	{ MLX5E_DECLARE_STAT(struct mlx5e_ipsec_hw_stats, ipsec_rx_pkts) },
+	{ MLX5E_DECLARE_STAT(struct mlx5e_ipsec_hw_stats, ipsec_rx_bytes) },
+	{ MLX5E_DECLARE_STAT(struct mlx5e_ipsec_hw_stats, ipsec_rx_drop_pkts) },
+	{ MLX5E_DECLARE_STAT(struct mlx5e_ipsec_hw_stats, ipsec_rx_drop_bytes) },
+	{ MLX5E_DECLARE_STAT(struct mlx5e_ipsec_hw_stats, ipsec_tx_pkts) },
+	{ MLX5E_DECLARE_STAT(struct mlx5e_ipsec_hw_stats, ipsec_tx_bytes) },
+	{ MLX5E_DECLARE_STAT(struct mlx5e_ipsec_hw_stats, ipsec_tx_drop_pkts) },
+	{ MLX5E_DECLARE_STAT(struct mlx5e_ipsec_hw_stats, ipsec_tx_drop_bytes) },
+};
+
 static const struct counter_desc mlx5e_ipsec_sw_stats_desc[] = {
 	{ MLX5E_DECLARE_STAT(struct mlx5e_ipsec_sw_stats, ipsec_rx_drop_sp_alloc) },
 	{ MLX5E_DECLARE_STAT(struct mlx5e_ipsec_sw_stats, ipsec_rx_drop_sadb_miss) },
@@ -50,8 +61,48 @@ static const struct counter_desc mlx5e_ipsec_sw_stats_desc[] = {
 #define MLX5E_READ_CTR_ATOMIC64(ptr, dsc, i) \
 	atomic64_read((atomic64_t *)((char *)(ptr) + (dsc)[i].offset))
 
+#define NUM_IPSEC_HW_COUNTERS ARRAY_SIZE(mlx5e_ipsec_hw_stats_desc)
 #define NUM_IPSEC_SW_COUNTERS ARRAY_SIZE(mlx5e_ipsec_sw_stats_desc)
 
+static MLX5E_DECLARE_STATS_GRP_OP_NUM_STATS(ipsec_hw)
+{
+	if (!priv->ipsec)
+		return 0;
+
+	return NUM_IPSEC_HW_COUNTERS;
+}
+
+static inline MLX5E_DECLARE_STATS_GRP_OP_UPDATE_STATS(ipsec_hw) {}
+
+static MLX5E_DECLARE_STATS_GRP_OP_FILL_STRS(ipsec_hw)
+{
+	unsigned int i;
+
+	if (!priv->ipsec)
+		return idx;
+
+	for (i = 0; i < NUM_IPSEC_HW_COUNTERS; i++)
+		strcpy(data + (idx++) * ETH_GSTRING_LEN,
+		       mlx5e_ipsec_hw_stats_desc[i].format);
+
+	return idx;
+}
+
+static MLX5E_DECLARE_STATS_GRP_OP_FILL_STATS(ipsec_hw)
+{
+	int i;
+
+	if (!priv->ipsec)
+		return idx;
+
+	mlx5e_accel_ipsec_fs_read_stats(priv, &priv->ipsec->hw_stats);
+	for (i = 0; i < NUM_IPSEC_HW_COUNTERS; i++)
+		data[idx++] = MLX5E_READ_CTR_ATOMIC64(&priv->ipsec->hw_stats,
+						      mlx5e_ipsec_hw_stats_desc, i);
+
+	return idx;
+}
+
 static MLX5E_DECLARE_STATS_GRP_OP_NUM_STATS(ipsec_sw)
 {
 	return priv->ipsec ? NUM_IPSEC_SW_COUNTERS : 0;
@@ -81,4 +132,5 @@ static MLX5E_DECLARE_STATS_GRP_OP_FILL_STATS(ipsec_sw)
 	return idx;
 }
 
+MLX5E_DEFINE_STATS_GRP(ipsec_hw, 0);
 MLX5E_DEFINE_STATS_GRP(ipsec_sw, 0);

drivers/net/ethernet/mellanox/mlx5/core/en_stats.c

@@ -2480,6 +2480,7 @@ mlx5e_stats_grp_t mlx5e_nic_stats_grps[] = {
 	&MLX5E_STATS_GRP(per_prio),
 	&MLX5E_STATS_GRP(pme),
 #ifdef CONFIG_MLX5_EN_IPSEC
+	&MLX5E_STATS_GRP(ipsec_hw),
 	&MLX5E_STATS_GRP(ipsec_sw),
 #endif
 	&MLX5E_STATS_GRP(tls),

drivers/net/ethernet/mellanox/mlx5/core/en_stats.h

@@ -490,6 +490,7 @@ extern MLX5E_DECLARE_STATS_GRP(per_prio);
 extern MLX5E_DECLARE_STATS_GRP(pme);
 extern MLX5E_DECLARE_STATS_GRP(channels);
 extern MLX5E_DECLARE_STATS_GRP(per_port_buff_congest);
+extern MLX5E_DECLARE_STATS_GRP(ipsec_hw);
 extern MLX5E_DECLARE_STATS_GRP(ipsec_sw);
 extern MLX5E_DECLARE_STATS_GRP(ptp);
 extern MLX5E_DECLARE_STATS_GRP(macsec_hw);