net/mlx5e: Add RX buffer fullness counters

rx_buffer_passed_thres_phy - The number of events where the port RX
buffer has passed a fullness threshold.

rx_buffer_full_phy - The number of events where the port RX buffer has
reached 100% fullness.

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 07202f7..8c013a5 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
@@ -242,6 +242,10 @@ 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_PPORT_ETH_EXT_COUNTERS(priv); i++)
+               strcpy(data + (idx++) * ETH_GSTRING_LEN,
+                      pport_eth_ext_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);
@@ -377,6 +381,10 @@ void mlx5e_ethtool_get_ethtool_stats(struct mlx5e_priv *priv,
                data[idx++] = MLX5E_READ_CTR64_BE(&priv->stats.pport.phy_statistical_counters,
                                                  pport_phy_statistical_stats_desc, i);
 
+       for (i = 0; i < NUM_PPORT_ETH_EXT_COUNTERS(priv); i++)
+               data[idx++] = MLX5E_READ_CTR64_BE(&priv->stats.pport.eth_ext_counters,
+                                                 pport_eth_ext_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);

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index 7c512a4..fdc2b92 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -288,6 +288,12 @@ static void mlx5e_update_pport_counters(struct mlx5e_priv *priv, bool full)
                mlx5_core_access_reg(mdev, in, sz, out, sz, MLX5_REG_PPCNT, 0, 0);
        }
 
+       if (MLX5_CAP_PCAM_FEATURE(mdev, rx_buffer_fullness_counters)) {
+               out = pstats->eth_ext_counters;
+               MLX5_SET(ppcnt_reg, in, grp, MLX5_ETHERNET_EXTENDED_COUNTERS_GROUP);
+               mlx5_core_access_reg(mdev, in, sz, out, sz, MLX5_REG_PPCNT, 0, 0);
+       }
+
        MLX5_SET(ppcnt_reg, in, grp, MLX5_PER_PRIORITY_COUNTERS_GROUP);
        for (prio = 0; prio < NUM_PPORT_PRIO; prio++) {
                out = pstats->per_prio_counters[prio];

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_stats.h b/drivers/net/ethernet/mellanox/mlx5/core/en_stats.h
index bdddddc..be49df4 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_stats.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_stats.h
@@ -216,6 +216,12 @@ static const struct counter_desc vport_stats_desc[] = {
        MLX5_GET64(ppcnt_reg, pstats->per_prio_counters[prio], \
                   counter_set.eth_per_prio_grp_data_layout.c##_high)
 #define NUM_PPORT_PRIO                         8
+#define PPORT_ETH_EXT_OFF(c) \
+       MLX5_BYTE_OFF(ppcnt_reg, \
+                     counter_set.eth_extended_cntrs_grp_data_layout.c##_high)
+#define PPORT_ETH_EXT_GET(pstats, c) \
+       MLX5_GET64(ppcnt_reg, (pstats)->eth_ext_counters, \
+                  counter_set.eth_extended_cntrs_grp_data_layout.c##_high)
 
 struct mlx5e_pport_stats {
        __be64 IEEE_802_3_counters[MLX5_ST_SZ_QW(ppcnt_reg)];
@@ -224,6 +230,7 @@ struct mlx5e_pport_stats {
        __be64 per_prio_counters[NUM_PPORT_PRIO][MLX5_ST_SZ_QW(ppcnt_reg)];
        __be64 phy_counters[MLX5_ST_SZ_QW(ppcnt_reg)];
        __be64 phy_statistical_counters[MLX5_ST_SZ_QW(ppcnt_reg)];
+       __be64 eth_ext_counters[MLX5_ST_SZ_QW(ppcnt_reg)];
 };
 
 static const struct counter_desc pport_802_3_stats_desc[] = {
@@ -290,6 +297,10 @@ static const struct counter_desc pport_per_prio_pfc_stats_desc[] = {
        { "rx_%s_pause_transition", PPORT_PER_PRIO_OFF(rx_pause_transition) },
 };
 
+static const struct counter_desc pport_eth_ext_stats_desc[] = {
+       { "rx_buffer_passed_thres_phy", PPORT_ETH_EXT_OFF(rx_buffer_almost_full) },
+};
+
 #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) \
@@ -411,12 +422,16 @@ static const struct counter_desc sq_stats_desc[] = {
        ARRAY_SIZE(pport_per_prio_traffic_stats_desc)
 #define NUM_PPORT_PER_PRIO_PFC_COUNTERS \
        ARRAY_SIZE(pport_per_prio_pfc_stats_desc)
+#define NUM_PPORT_ETH_EXT_COUNTERS(priv) \
+       (ARRAY_SIZE(pport_eth_ext_stats_desc) * \
+        MLX5_CAP_PCAM_FEATURE((priv)->mdev, rx_buffer_fullness_counters))
 #define NUM_PPORT_COUNTERS(priv)       (NUM_PPORT_802_3_COUNTERS + \
                                         NUM_PPORT_2863_COUNTERS  + \
                                         NUM_PPORT_2819_COUNTERS  + \
                                         NUM_PPORT_PHY_STATISTICAL_COUNTERS(priv) + \
                                         NUM_PPORT_PER_PRIO_TRAFFIC_COUNTERS * \
-                                        NUM_PPORT_PRIO)
+                                        NUM_PPORT_PRIO + \
+                                        NUM_PPORT_ETH_EXT_COUNTERS(priv))
 #define NUM_PCIE_COUNTERS(priv)                (NUM_PCIE_PERF_COUNTERS(priv) + \
                                         NUM_PCIE_PERF_STALL_COUNTERS(priv))
 #define NUM_RQ_STATS                   ARRAY_SIZE(rq_stats_desc)