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Commit 0f7f3481 authored by Gal Pressman's avatar Gal Pressman Committed by Saeed Mahameed
Browse files

net/mlx5e: Expose PCIe statistics to ethtool 



This patch exposes PCIe performance counters, queried with
ethtool -S <devname>.

Signed-off-by: default avatarGal Pressman <galp@mellanox.com>
Signed-off-by: default avatarSaeed Mahameed <saeedm@mellanox.com>
parent 8ed1a630

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

+9 −0
Original line number Diff line number Diff line
@@ -171,6 +171,7 @@ static int mlx5e_get_sset_count(struct net_device *dev, int sset) 
		return NUM_SW_COUNTERS +

		       MLX5E_NUM_Q_CNTRS(priv) +

		       NUM_VPORT_COUNTERS + NUM_PPORT_COUNTERS(priv) +

		       NUM_PCIE_COUNTERS(priv) +

		       MLX5E_NUM_RQ_STATS(priv) +

		       MLX5E_NUM_SQ_STATS(priv) +

		       MLX5E_NUM_PFC_COUNTERS(priv) +
@@ -222,6 +223,10 @@ static void mlx5e_fill_stats_strings(struct mlx5e_priv *priv, uint8_t *data) 
		strcpy(data + (idx++) * ETH_GSTRING_LEN,

		       pport_phy_statistical_stats_desc[i].format);



	for (i = 0; i < NUM_PCIE_PERF_COUNTERS(priv); i++)

		strcpy(data + (idx++) * ETH_GSTRING_LEN,

		       pcie_perf_stats_desc[i].format);



	for (prio = 0; prio < NUM_PPORT_PRIO; prio++) {

		for (i = 0; i < NUM_PPORT_PER_PRIO_TRAFFIC_COUNTERS; i++)

			sprintf(data + (idx++) * ETH_GSTRING_LEN,
@@ -338,6 +343,10 @@ static void mlx5e_get_ethtool_stats(struct net_device *dev, 
		data[idx++] = MLX5E_READ_CTR64_BE(&priv->stats.pport.phy_statistical_counters,

						  pport_phy_statistical_stats_desc, i);



	for (i = 0; i < NUM_PCIE_PERF_COUNTERS(priv); i++)

		data[idx++] = MLX5E_READ_CTR32_BE(&priv->stats.pcie.pcie_perf_counters,

						  pcie_perf_stats_desc, i);



	for (prio = 0; prio < NUM_PPORT_PRIO; prio++) {

		for (i = 0; i < NUM_PPORT_PER_PRIO_TRAFFIC_COUNTERS; i++)

			data[idx++] = MLX5E_READ_CTR64_BE(&priv->stats.pport.per_prio_counters[prio],

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

+23 −0
Original line number Diff line number Diff line
@@ -297,12 +297,35 @@ static void mlx5e_update_q_counter(struct mlx5e_priv *priv) 
				      &qcnt->rx_out_of_buffer);

}



static void mlx5e_update_pcie_counters(struct mlx5e_priv *priv)

{

	struct mlx5e_pcie_stats *pcie_stats = &priv->stats.pcie;

	struct mlx5_core_dev *mdev = priv->mdev;

	int sz = MLX5_ST_SZ_BYTES(mpcnt_reg);

	void *out;

	u32 *in;



	if (!MLX5_CAP_MCAM_FEATURE(mdev, pcie_performance_group))

		return;



	in = mlx5_vzalloc(sz);

	if (!in)

		return;



	out = pcie_stats->pcie_perf_counters;

	MLX5_SET(mpcnt_reg, in, grp, MLX5_PCIE_PERFORMANCE_COUNTERS_GROUP);

	mlx5_core_access_reg(mdev, in, sz, out, sz, MLX5_REG_MPCNT, 0, 0);



	kvfree(in);

}



void mlx5e_update_stats(struct mlx5e_priv *priv)

{

	mlx5e_update_q_counter(priv);

	mlx5e_update_vport_counters(priv);

	mlx5e_update_pport_counters(priv);

	mlx5e_update_sw_counters(priv);

	mlx5e_update_pcie_counters(priv);

}



void mlx5e_update_stats_work(struct work_struct *work)

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

+21 −1
Original line number Diff line number Diff line
@@ -39,7 +39,7 @@ 
#define MLX5E_READ_CTR32_CPU(ptr, dsc, i) \

	(*(u32 *)((char *)ptr + dsc[i].offset))

#define MLX5E_READ_CTR32_BE(ptr, dsc, i) \

	be64_to_cpu(*(__be32 *)((char *)ptr + dsc[i].offset))

	be32_to_cpu(*(__be32 *)((char *)ptr + dsc[i].offset))



#define MLX5E_DECLARE_STAT(type, fld) #fld, offsetof(type, fld)

#define MLX5E_DECLARE_RX_STAT(type, fld) "rx%d_"#fld, offsetof(type, fld)
@@ -288,6 +288,21 @@ static const struct counter_desc pport_per_prio_pfc_stats_desc[] = { 
	{ "rx_%s_pause_transition", PPORT_PER_PRIO_OFF(rx_pause_transition) },

};



#define PCIE_PERF_OFF(c) \

	MLX5_BYTE_OFF(mpcnt_reg, counter_set.pcie_perf_cntrs_grp_data_layout.c)

#define PCIE_PERF_GET(pcie_stats, c) \

	MLX5_GET(mpcnt_reg, (pcie_stats)->pcie_perf_counters, \

		 counter_set.pcie_perf_cntrs_grp_data_layout.c)



struct mlx5e_pcie_stats {

	__be64 pcie_perf_counters[MLX5_ST_SZ_QW(mpcnt_reg)];

};



static const struct counter_desc pcie_perf_stats_desc[] = {

	{ "rx_pci_signal_integrity", PCIE_PERF_OFF(rx_errors) },

	{ "tx_pci_signal_integrity", PCIE_PERF_OFF(tx_errors) },

};



struct mlx5e_rq_stats {

	u64 packets;

	u64 bytes;
@@ -375,6 +390,9 @@ static const struct counter_desc sq_stats_desc[] = { 
#define NUM_PPORT_PHY_STATISTICAL_COUNTERS(priv) \

	(ARRAY_SIZE(pport_phy_statistical_stats_desc) * \

	 MLX5_CAP_PCAM_FEATURE((priv)->mdev, ppcnt_statistical_group))

#define NUM_PCIE_PERF_COUNTERS(priv) \

	(ARRAY_SIZE(pcie_perf_stats_desc) * \

	 MLX5_CAP_MCAM_FEATURE((priv)->mdev, pcie_performance_group))

#define NUM_PPORT_PER_PRIO_TRAFFIC_COUNTERS \

	ARRAY_SIZE(pport_per_prio_traffic_stats_desc)

#define NUM_PPORT_PER_PRIO_PFC_COUNTERS \
@@ -385,6 +403,7 @@ static const struct counter_desc sq_stats_desc[] = { 
					 NUM_PPORT_PHY_STATISTICAL_COUNTERS(priv) + \

					 NUM_PPORT_PER_PRIO_TRAFFIC_COUNTERS * \

					 NUM_PPORT_PRIO)

#define NUM_PCIE_COUNTERS(priv)		NUM_PCIE_PERF_COUNTERS(priv)

#define NUM_RQ_STATS			ARRAY_SIZE(rq_stats_desc)

#define NUM_SQ_STATS			ARRAY_SIZE(sq_stats_desc)
@@ -394,6 +413,7 @@ struct mlx5e_stats { 
	struct mlx5e_vport_stats vport;

	struct mlx5e_pport_stats pport;

	struct rtnl_link_stats64 vf_vport;

	struct mlx5e_pcie_stats pcie;

};



static const struct counter_desc mlx5e_pme_status_desc[] = {