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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Richard Cochran , linux-rdma@vger.kernel.org (open list:MELLANOX MLX5 core VPI driver) Subject: [RFC net-next v3 2/2] net/mlx5e: Add per queue netdev-genl stats Date: Wed, 29 May 2024 03:16:27 +0000 Message-Id: <20240529031628.324117-3-jdamato@fastly.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240529031628.324117-1-jdamato@fastly.com> References: <20240529031628.324117-1-jdamato@fastly.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org X-Patchwork-State: RFC Add functions to support the netdev-genl per queue stats API. ./cli.py --spec netlink/specs/netdev.yaml \ --dump qstats-get --json '{"scope": "queue"}' ...snip {'ifindex': 7, 'queue-id': 62, 'queue-type': 'rx', 'rx-alloc-fail': 0, 'rx-bytes': 105965251, 'rx-packets': 179790}, {'ifindex': 7, 'queue-id': 0, 'queue-type': 'tx', 'tx-bytes': 9402665, 'tx-packets': 17551}, ...snip Also tested with the script tools/testing/selftests/drivers/net/stats.py in several scenarios to ensure stats tallying was correct: - on boot (default queue counts) - adjusting queue count up or down (ethtool -L eth0 combined ...) - adding mqprio TCs Signed-off-by: Joe Damato Reviewed-by: Jacob Keller --- .../net/ethernet/mellanox/mlx5/core/en_main.c | 132 ++++++++++++++++++ 1 file changed, 132 insertions(+) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c index ce15805ad55a..515c16a88a6c 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c @@ -39,6 +39,7 @@ #include #include #include +#include #include #include #include @@ -5293,6 +5294,136 @@ static bool mlx5e_tunnel_any_tx_proto_supported(struct mlx5_core_dev *mdev) return (mlx5_vxlan_allowed(mdev->vxlan) || mlx5_geneve_tx_allowed(mdev)); } +static void mlx5e_get_queue_stats_rx(struct net_device *dev, int i, + struct netdev_queue_stats_rx *stats) +{ + struct mlx5e_priv *priv = netdev_priv(dev); + struct mlx5e_channel_stats *channel_stats; + struct mlx5e_rq_stats *xskrq_stats; + struct mlx5e_rq_stats *rq_stats; + + if (mlx5e_is_uplink_rep(priv)) + return; + + channel_stats = priv->channel_stats[i]; + xskrq_stats = &channel_stats->xskrq; + rq_stats = &channel_stats->rq; + + stats->packets = rq_stats->packets + xskrq_stats->packets; + stats->bytes = rq_stats->bytes + xskrq_stats->bytes; + stats->alloc_fail = rq_stats->buff_alloc_err + + xskrq_stats->buff_alloc_err; +} + +static void mlx5e_get_queue_stats_tx(struct net_device *dev, int i, + struct netdev_queue_stats_tx *stats) +{ + struct mlx5e_priv *priv = netdev_priv(dev); + struct mlx5e_channel_stats *channel_stats; + struct mlx5e_sq_stats *sq_stats; + int ch_ix, tc_ix; + + mutex_lock(&priv->state_lock); + txq_ix_to_chtc_ix(&priv->channels.params, i, &ch_ix, &tc_ix); + mutex_unlock(&priv->state_lock); + + channel_stats = priv->channel_stats[ch_ix]; + sq_stats = &channel_stats->sq[tc_ix]; + + stats->packets = sq_stats->packets; + stats->bytes = sq_stats->bytes; +} + +static void mlx5e_get_base_stats(struct net_device *dev, + struct netdev_queue_stats_rx *rx, + struct netdev_queue_stats_tx *tx) +{ + struct mlx5e_priv *priv = netdev_priv(dev); + int i, j; + + if (!mlx5e_is_uplink_rep(priv)) { + rx->packets = 0; + rx->bytes = 0; + rx->alloc_fail = 0; + + /* compute stats for deactivated RX queues + * + * if priv->channels.num == 0 the device is down, so compute + * stats for every queue. + * + * otherwise, compute only the queues which have been deactivated. + */ + mutex_lock(&priv->state_lock); + if (priv->channels.num == 0) + i = 0; + else + i = priv->channels.params.num_channels; + mutex_unlock(&priv->state_lock); + + for (; i < priv->stats_nch; i++) { + struct netdev_queue_stats_rx rx_i = {0}; + + mlx5e_get_queue_stats_rx(dev, i, &rx_i); + + rx->packets += rx_i.packets; + rx->bytes += rx_i.bytes; + rx->alloc_fail += rx_i.alloc_fail; + } + + if (priv->rx_ptp_opened) { + struct mlx5e_rq_stats *rq_stats = &priv->ptp_stats.rq; + + rx->packets += rq_stats->packets; + rx->bytes += rq_stats->bytes; + } + } + + tx->packets = 0; + tx->bytes = 0; + + mutex_lock(&priv->state_lock); + for (i = 0; i < priv->stats_nch; i++) { + struct mlx5e_channel_stats *channel_stats = priv->channel_stats[i]; + + /* while iterating through all channels [0, stats_nch], there + * are two cases to handle: + * + * 1. the channel is available, so sum only the unavailable TCs + * [mlx5e_get_dcb_num_tc, max_opened_tc). + * + * 2. the channel is unavailable, so sum all TCs [0, max_opened_tc). + */ + if (i < priv->channels.params.num_channels) { + j = mlx5e_get_dcb_num_tc(&priv->channels.params); + } else { + j = 0; + } + + for (; j < priv->max_opened_tc; j++) { + struct mlx5e_sq_stats *sq_stats = &channel_stats->sq[j]; + + tx->packets += sq_stats->packets; + tx->bytes += sq_stats->bytes; + } + } + mutex_unlock(&priv->state_lock); + + if (priv->tx_ptp_opened) { + for (j = 0; j < priv->max_opened_tc; j++) { + struct mlx5e_sq_stats *sq_stats = &priv->ptp_stats.sq[j]; + + tx->packets += sq_stats->packets; + tx->bytes += sq_stats->bytes; + } + } +} + +static const struct netdev_stat_ops mlx5e_stat_ops = { + .get_queue_stats_rx = mlx5e_get_queue_stats_rx, + .get_queue_stats_tx = mlx5e_get_queue_stats_tx, + .get_base_stats = mlx5e_get_base_stats, +}; + static void mlx5e_build_nic_netdev(struct net_device *netdev) { struct mlx5e_priv *priv = netdev_priv(netdev); @@ -5310,6 +5441,7 @@ static void mlx5e_build_nic_netdev(struct net_device *netdev) netdev->watchdog_timeo = 15 * HZ; + netdev->stat_ops = &mlx5e_stat_ops; netdev->ethtool_ops = &mlx5e_ethtool_ops; netdev->vlan_features |= NETIF_F_SG;