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net/mlx5e: Expose PCIe statistics to ethtool
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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>
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Gal Pressman authored and Saeed Mahameed committed Jan 19, 2017
1 parent 8ed1a63 commit 0f7f348
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Showing 3 changed files with 53 additions and 1 deletion.
9 changes: 9 additions & 0 deletions drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
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Original file line number Diff line number Diff line change
Expand Up @@ -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) +
Expand Down Expand Up @@ -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,
Expand Down Expand Up @@ -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],
Expand Down
23 changes: 23 additions & 0 deletions drivers/net/ethernet/mellanox/mlx5/core/en_main.c
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Original file line number Diff line number Diff line change
Expand Up @@ -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)
Expand Down
22 changes: 21 additions & 1 deletion drivers/net/ethernet/mellanox/mlx5/core/en_stats.h
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Original file line number Diff line number Diff line change
Expand Up @@ -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)
Expand Down Expand Up @@ -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;
Expand Down Expand Up @@ -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 \
Expand All @@ -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)

Expand All @@ -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[] = {
Expand Down

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