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net/mlx5e: Add device out of buffer counter
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Added the following packets drop counter:
Device out of buffer - counts packets which were dropped due to full
device internal receive queue.
This counter will be shown on ethtool as a new counter called
dev_out_of_buffer.
The counter is read from FW by command QUERY_VNIC_ENV.

Signed-off-by: Moshe Shemesh <moshe@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
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Moshe Shemesh authored and Saeed Mahameed committed Aug 28, 2019
1 parent 45f171b commit 0cfafd4
Showing 1 changed file with 25 additions and 13 deletions.
38 changes: 25 additions & 13 deletions drivers/net/ethernet/mellanox/mlx5/core/en_stats.c
Original file line number Diff line number Diff line change
Expand Up @@ -369,30 +369,41 @@ static void mlx5e_grp_q_update_stats(struct mlx5e_priv *priv)
}

#define VNIC_ENV_OFF(c) MLX5_BYTE_OFF(query_vnic_env_out, c)
static const struct counter_desc vnic_env_stats_desc[] = {
static const struct counter_desc vnic_env_stats_steer_desc[] = {
{ "rx_steer_missed_packets",
VNIC_ENV_OFF(vport_env.nic_receive_steering_discard) },
};

#define NUM_VNIC_ENV_COUNTERS ARRAY_SIZE(vnic_env_stats_desc)
static const struct counter_desc vnic_env_stats_dev_oob_desc[] = {
{ "dev_internal_queue_oob",
VNIC_ENV_OFF(vport_env.internal_rq_out_of_buffer) },
};

#define NUM_VNIC_ENV_STEER_COUNTERS(dev) \
(MLX5_CAP_GEN(dev, nic_receive_steering_discard) ? \
ARRAY_SIZE(vnic_env_stats_steer_desc) : 0)
#define NUM_VNIC_ENV_DEV_OOB_COUNTERS(dev) \
(MLX5_CAP_GEN(dev, vnic_env_int_rq_oob) ? \
ARRAY_SIZE(vnic_env_stats_dev_oob_desc) : 0)

static int mlx5e_grp_vnic_env_get_num_stats(struct mlx5e_priv *priv)
{
return MLX5_CAP_GEN(priv->mdev, nic_receive_steering_discard) ?
NUM_VNIC_ENV_COUNTERS : 0;
return NUM_VNIC_ENV_STEER_COUNTERS(priv->mdev) +
NUM_VNIC_ENV_DEV_OOB_COUNTERS(priv->mdev);
}

static int mlx5e_grp_vnic_env_fill_strings(struct mlx5e_priv *priv, u8 *data,
int idx)
{
int i;

if (!MLX5_CAP_GEN(priv->mdev, nic_receive_steering_discard))
return idx;
for (i = 0; i < NUM_VNIC_ENV_STEER_COUNTERS(priv->mdev); i++)
strcpy(data + (idx++) * ETH_GSTRING_LEN,
vnic_env_stats_steer_desc[i].format);

for (i = 0; i < NUM_VNIC_ENV_COUNTERS; i++)
for (i = 0; i < NUM_VNIC_ENV_DEV_OOB_COUNTERS(priv->mdev); i++)
strcpy(data + (idx++) * ETH_GSTRING_LEN,
vnic_env_stats_desc[i].format);
vnic_env_stats_dev_oob_desc[i].format);
return idx;
}

Expand All @@ -401,12 +412,13 @@ static int mlx5e_grp_vnic_env_fill_stats(struct mlx5e_priv *priv, u64 *data,
{
int i;

if (!MLX5_CAP_GEN(priv->mdev, nic_receive_steering_discard))
return idx;

for (i = 0; i < NUM_VNIC_ENV_COUNTERS; i++)
for (i = 0; i < NUM_VNIC_ENV_STEER_COUNTERS(priv->mdev); i++)
data[idx++] = MLX5E_READ_CTR64_BE(priv->stats.vnic.query_vnic_env_out,
vnic_env_stats_desc, i);
vnic_env_stats_steer_desc, i);

for (i = 0; i < NUM_VNIC_ENV_DEV_OOB_COUNTERS(priv->mdev); i++)
data[idx++] = MLX5E_READ_CTR32_BE(priv->stats.vnic.query_vnic_env_out,
vnic_env_stats_dev_oob_desc, i);
return idx;
}

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