net/mlx5e: Add PCIe outbound stalls counters

outbound_pci_stalled_rd - The percentage of time within the last second
that the NIC had outbound non-posted read requests but could not perform
the operation due to insufficient non-posted credits.

outbound_pci_stalled_wr - The percentage of time within the
last second that the NIC had outbound posted writes requests but could
not perform the operation due to insufficient posted credits.

outbound_pci_stalled_rd_events - The number of events where
outbound_pci_stalled_rd was above the threshold.

outbound_pci_stalled_wr_events - The number of events where
outbound_pci_stalled_wr was above the threshold.

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 917fade..07202f7 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
@@ -246,6 +246,10 @@ static void mlx5e_fill_stats_strings(struct mlx5e_priv *priv, uint8_t *data)
                strcpy(data + (idx++) * ETH_GSTRING_LEN,
                       pcie_perf_stats_desc[i].format);
 
+       for (i = 0; i < NUM_PCIE_PERF_STALL_COUNTERS(priv); i++)
+               strcpy(data + (idx++) * ETH_GSTRING_LEN,
+                      pcie_perf_stall_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,
@@ -377,6 +381,10 @@ void mlx5e_ethtool_get_ethtool_stats(struct mlx5e_priv *priv,
                data[idx++] = MLX5E_READ_CTR32_BE(&priv->stats.pcie.pcie_perf_counters,
                                                  pcie_perf_stats_desc, i);
 
+       for (i = 0; i < NUM_PCIE_PERF_STALL_COUNTERS(priv); i++)
+               data[idx++] = MLX5E_READ_CTR32_BE(&priv->stats.pcie.pcie_perf_counters,
+                                                 pcie_perf_stall_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_stats.h b/drivers/net/ethernet/mellanox/mlx5/core/en_stats.h
index e65517e..bdddddc 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_stats.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_stats.h
@@ -305,6 +305,13 @@ static const struct counter_desc pcie_perf_stats_desc[] = {
        { "tx_pci_signal_integrity", PCIE_PERF_OFF(tx_errors) },
 };
 
+static const struct counter_desc pcie_perf_stall_stats_desc[] = {
+       { "outbound_pci_stalled_rd", PCIE_PERF_OFF(outbound_stalled_reads) },
+       { "outbound_pci_stalled_wr", PCIE_PERF_OFF(outbound_stalled_writes) },
+       { "outbound_pci_stalled_rd_events", PCIE_PERF_OFF(outbound_stalled_reads_events) },
+       { "outbound_pci_stalled_wr_events", PCIE_PERF_OFF(outbound_stalled_writes_events) },
+};
+
 struct mlx5e_rq_stats {
        u64 packets;
        u64 bytes;
@@ -397,6 +404,9 @@ static const struct counter_desc sq_stats_desc[] = {
 #define NUM_PCIE_PERF_COUNTERS(priv) \
        (ARRAY_SIZE(pcie_perf_stats_desc) * \
         MLX5_CAP_MCAM_FEATURE((priv)->mdev, pcie_performance_group))
+#define NUM_PCIE_PERF_STALL_COUNTERS(priv) \
+       (ARRAY_SIZE(pcie_perf_stall_stats_desc) * \
+        MLX5_CAP_MCAM_FEATURE((priv)->mdev, pcie_outbound_stalled))
 #define NUM_PPORT_PER_PRIO_TRAFFIC_COUNTERS \
        ARRAY_SIZE(pport_per_prio_traffic_stats_desc)
 #define NUM_PPORT_PER_PRIO_PFC_COUNTERS \
@@ -407,7 +417,8 @@ 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_PCIE_COUNTERS(priv)                (NUM_PCIE_PERF_COUNTERS(priv) + \
+                                        NUM_PCIE_PERF_STALL_COUNTERS(priv))
 #define NUM_RQ_STATS                   ARRAY_SIZE(rq_stats_desc)
 #define NUM_SQ_STATS                   ARRAY_SIZE(sq_stats_desc)