net/mlx5e: Expose PCIe statistics to ethtool

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

Signed-off-by: Gal Pressman <galp@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
index dcc3e4dc1484b77ccf94aa1d1026813c83ecb738..4021863e3840204d3668c4ef2b7771199743e3b2 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
@@ -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],

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index 3be87a65d7501fe55b6266eb20931b1c065113df..9aed892cd35056dab9a41b2a408bfce7db810138 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -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)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_stats.h b/drivers/net/ethernet/mellanox/mlx5/core/en_stats.h
index 21c43d4e4f2e7a053b1f9a8e753bc33ed4c9d06d..53e4992d6511f578c5bb31e993afb0986789a979 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_stats.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_stats.h
@@ -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[] = {