net/mlx5e: Add MACsec stats support for Rx/Tx flows

Add the following statistics:
RX successfully decrypted MACsec packets:
macsec_rx_pkts : Number of packets decrypted successfully
macsec_rx_bytes : Number of bytes decrypted successfully

Rx dropped MACsec packets:
macsec_rx_pkts_drop : Number of MACsec packets dropped
macsec_rx_bytes_drop : Number of MACsec bytes dropped

TX successfully encrypted MACsec packets:
macsec_tx_pkts : Number of packets encrypted/authenticated successfully
macsec_tx_bytes : Number of bytes encrypted/authenticated successfully

Tx dropped MACsec packets:
macsec_tx_pkts_drop : Number of MACsec packets dropped
macsec_tx_bytes_drop : Number of MACsec bytes dropped

The above can be seen using:
ethtool -S <ifc> |grep macsec

Signed-off-by: Lior Nahmanson <liorna@nvidia.com>
Reviewed-by: Raed Salem <raeds@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlx5/core/Makefile

@@ -92,7 +92,8 @@ mlx5_core-$(CONFIG_MLX5_CORE_IPOIB) += ipoib/ipoib.o ipoib/ethtool.o ipoib/ipoib
 #
 mlx5_core-$(CONFIG_MLX5_FPGA) += fpga/cmd.o fpga/core.o fpga/conn.o fpga/sdk.o
 
-mlx5_core-$(CONFIG_MLX5_EN_MACSEC) += en_accel/macsec.o en_accel/macsec_fs.o
+mlx5_core-$(CONFIG_MLX5_EN_MACSEC) += en_accel/macsec.o en_accel/macsec_fs.o \
+				      en_accel/macsec_stats.o
 
 mlx5_core-$(CONFIG_MLX5_EN_IPSEC) += en_accel/ipsec.o en_accel/ipsec_rxtx.o \
 				     en_accel/ipsec_stats.o en_accel/ipsec_fs.o \

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

@@ -68,6 +68,9 @@ struct mlx5e_macsec {
 
 	unsigned char *dev_addr;
 	struct mlx5_core_dev *mdev;
+
+	/* Stats manage */
+	struct mlx5e_macsec_stats stats;
 };
 
 struct mlx5_macsec_obj_attrs {
@@ -990,7 +993,7 @@ static int mlx5e_macsec_del_secy(struct macsec_context *ctx)
 	return 0;
 }
 
-static bool mlx5e_is_macsec_device(const struct mlx5_core_dev *mdev)
+bool mlx5e_is_macsec_device(const struct mlx5_core_dev *mdev)
 {
 	if (!(MLX5_CAP_GEN_64(mdev, general_obj_types) &
 	    MLX5_GENERAL_OBJ_TYPES_CAP_MACSEC_OFFLOAD))
@@ -1021,6 +1024,19 @@ static bool mlx5e_is_macsec_device(const struct mlx5_core_dev *mdev)
 	return true;
 }
 
+void mlx5e_macsec_get_stats_fill(struct mlx5e_macsec *macsec, void *macsec_stats)
+{
+	mlx5e_macsec_fs_get_stats_fill(macsec->macsec_fs, macsec_stats);
+}
+
+struct mlx5e_macsec_stats *mlx5e_macsec_get_stats(struct mlx5e_macsec *macsec)
+{
+	if (!macsec)
+		return NULL;
+
+	return &macsec->stats;
+}
+
 static const struct macsec_ops macsec_offload_ops = {
 	.mdo_add_txsa = mlx5e_macsec_add_txsa,
 	.mdo_upd_txsa = mlx5e_macsec_upd_txsa,

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

@@ -17,6 +17,17 @@
 struct mlx5e_priv;
 struct mlx5e_macsec;
 
+struct mlx5e_macsec_stats {
+	u64 macsec_rx_pkts;
+	u64 macsec_rx_bytes;
+	u64 macsec_rx_pkts_drop;
+	u64 macsec_rx_bytes_drop;
+	u64 macsec_tx_pkts;
+	u64 macsec_tx_bytes;
+	u64 macsec_tx_pkts_drop;
+	u64 macsec_tx_bytes_drop;
+};
+
 void mlx5e_macsec_build_netdev(struct mlx5e_priv *priv);
 int mlx5e_macsec_init(struct mlx5e_priv *priv);
 void mlx5e_macsec_cleanup(struct mlx5e_priv *priv);
@@ -39,6 +50,9 @@ static inline bool mlx5e_macsec_is_rx_flow(struct mlx5_cqe64 *cqe)
 
 void mlx5e_macsec_offload_handle_rx_skb(struct net_device *netdev, struct sk_buff *skb,
 					struct mlx5_cqe64 *cqe);
+bool mlx5e_is_macsec_device(const struct mlx5_core_dev *mdev);
+void mlx5e_macsec_get_stats_fill(struct mlx5e_macsec *macsec, void *macsec_stats);
+struct mlx5e_macsec_stats *mlx5e_macsec_get_stats(struct mlx5e_macsec *macsec);
 
 #else
 
@@ -51,6 +65,7 @@ static inline void mlx5e_macsec_offload_handle_rx_skb(struct net_device *netdev,
 						      struct sk_buff *skb,
 						      struct mlx5_cqe64 *cqe)
 {}
+static inline bool mlx5e_is_macsec_device(const struct mlx5_core_dev *mdev) { return false; }
 
 #endif  /* CONFIG_MLX5_EN_MACSEC */
 

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

@@ -1297,6 +1297,30 @@ static void macsec_fs_rx_cleanup(struct mlx5e_macsec_fs *macsec_fs)
 	macsec_fs->rx_fs = NULL;
 }
 
+void mlx5e_macsec_fs_get_stats_fill(struct mlx5e_macsec_fs *macsec_fs, void *macsec_stats)
+{
+	struct mlx5e_macsec_stats *stats = (struct mlx5e_macsec_stats *)macsec_stats;
+	struct mlx5e_macsec_tables *tx_tables = &macsec_fs->tx_fs->tables;
+	struct mlx5e_macsec_tables *rx_tables = &macsec_fs->rx_fs->tables;
+	struct mlx5_core_dev *mdev = macsec_fs->mdev;
+
+	if (tx_tables->check_rule_counter)
+		mlx5_fc_query(mdev, tx_tables->check_rule_counter,
+			      &stats->macsec_tx_pkts, &stats->macsec_tx_bytes);
+
+	if (tx_tables->check_miss_rule_counter)
+		mlx5_fc_query(mdev, tx_tables->check_miss_rule_counter,
+			      &stats->macsec_tx_pkts_drop, &stats->macsec_tx_bytes_drop);
+
+	if (rx_tables->check_rule_counter)
+		mlx5_fc_query(mdev, rx_tables->check_rule_counter,
+			      &stats->macsec_rx_pkts, &stats->macsec_rx_bytes);
+
+	if (rx_tables->check_miss_rule_counter)
+		mlx5_fc_query(mdev, rx_tables->check_miss_rule_counter,
+			      &stats->macsec_rx_pkts_drop, &stats->macsec_rx_bytes_drop);
+}
+
 union mlx5e_macsec_rule *
 mlx5e_macsec_fs_add_rule(struct mlx5e_macsec_fs *macsec_fs,
 			 const struct macsec_context *macsec_ctx,

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

@@ -40,6 +40,8 @@ void mlx5e_macsec_fs_del_rule(struct mlx5e_macsec_fs *macsec_fs,
 			      union mlx5e_macsec_rule *macsec_rule,
 			      int action);
 
+void mlx5e_macsec_fs_get_stats_fill(struct mlx5e_macsec_fs *macsec_fs, void *macsec_stats);
+
 #endif
 
 #endif /* __MLX5_MACSEC_STEERING_H__ */

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

@@ -0,0 +1,72 @@
+// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
+/* Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved. */
+
+#include <linux/ethtool.h>
+#include <net/sock.h>
+
+#include "en.h"
+#include "en_accel/macsec.h"
+
+static const struct counter_desc mlx5e_macsec_hw_stats_desc[] = {
+	{ MLX5E_DECLARE_STAT(struct mlx5e_macsec_stats, macsec_rx_pkts) },
+	{ MLX5E_DECLARE_STAT(struct mlx5e_macsec_stats, macsec_rx_bytes) },
+	{ MLX5E_DECLARE_STAT(struct mlx5e_macsec_stats, macsec_rx_pkts_drop) },
+	{ MLX5E_DECLARE_STAT(struct mlx5e_macsec_stats, macsec_rx_bytes_drop) },
+	{ MLX5E_DECLARE_STAT(struct mlx5e_macsec_stats, macsec_tx_pkts) },
+	{ MLX5E_DECLARE_STAT(struct mlx5e_macsec_stats, macsec_tx_bytes) },
+	{ MLX5E_DECLARE_STAT(struct mlx5e_macsec_stats, macsec_tx_pkts_drop) },
+	{ MLX5E_DECLARE_STAT(struct mlx5e_macsec_stats, macsec_tx_bytes_drop) },
+};
+
+#define NUM_MACSEC_HW_COUNTERS ARRAY_SIZE(mlx5e_macsec_hw_stats_desc)
+
+static MLX5E_DECLARE_STATS_GRP_OP_NUM_STATS(macsec_hw)
+{
+	if (!priv->macsec)
+		return 0;
+
+	if (mlx5e_is_macsec_device(priv->mdev))
+		return NUM_MACSEC_HW_COUNTERS;
+
+	return 0;
+}
+
+static MLX5E_DECLARE_STATS_GRP_OP_UPDATE_STATS(macsec_hw) {}
+
+static MLX5E_DECLARE_STATS_GRP_OP_FILL_STRS(macsec_hw)
+{
+	unsigned int i;
+
+	if (!priv->macsec)
+		return idx;
+
+	if (!mlx5e_is_macsec_device(priv->mdev))
+		return idx;
+
+	for (i = 0; i < NUM_MACSEC_HW_COUNTERS; i++)
+		strcpy(data + (idx++) * ETH_GSTRING_LEN,
+		       mlx5e_macsec_hw_stats_desc[i].format);
+
+	return idx;
+}
+
+static MLX5E_DECLARE_STATS_GRP_OP_FILL_STATS(macsec_hw)
+{
+	int i;
+
+	if (!priv->macsec)
+		return idx;
+
+	if (!mlx5e_is_macsec_device(priv->mdev))
+		return idx;
+
+	mlx5e_macsec_get_stats_fill(priv->macsec, mlx5e_macsec_get_stats(priv->macsec));
+	for (i = 0; i < NUM_MACSEC_HW_COUNTERS; i++)
+		data[idx++] = MLX5E_READ_CTR64_CPU(mlx5e_macsec_get_stats(priv->macsec),
+						   mlx5e_macsec_hw_stats_desc,
+						   i);
+
+	return idx;
+}
+
+MLX5E_DEFINE_STATS_GRP(macsec_hw, 0);

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

@@ -2451,6 +2451,9 @@ mlx5e_stats_grp_t mlx5e_nic_stats_grps[] = {
 	&MLX5E_STATS_GRP(per_port_buff_congest),
 	&MLX5E_STATS_GRP(ptp),
 	&MLX5E_STATS_GRP(qos),
+#ifdef CONFIG_MLX5_EN_MACSEC
+	&MLX5E_STATS_GRP(macsec_hw),
+#endif
 };
 
 unsigned int mlx5e_nic_stats_grps_num(struct mlx5e_priv *priv)

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

@@ -486,5 +486,6 @@ extern MLX5E_DECLARE_STATS_GRP(channels);
 extern MLX5E_DECLARE_STATS_GRP(per_port_buff_congest);
 extern MLX5E_DECLARE_STATS_GRP(ipsec_sw);
 extern MLX5E_DECLARE_STATS_GRP(ptp);
+extern MLX5E_DECLARE_STATS_GRP(macsec_hw);
 
 #endif /* __MLX5_EN_STATS_H__ */