From 54984407564ef6b35488f52654f828c17b9d6fa8 Mon Sep 17 00:00:00 2001 From: Tariq Toukan Date: Wed, 20 Apr 2016 22:02:19 +0300 Subject: [PATCH] net/mlx5e: Add ethtool counter for RX buffer allocation failures Counts the number of RX buffer allocation failures and shows it in ethtool statistics. Signed-off-by: Tariq Toukan Signed-off-by: Saeed Mahameed Signed-off-by: David S. Miller --- drivers/net/ethernet/mellanox/mlx5/core/en.h | 8 ++++++-- drivers/net/ethernet/mellanox/mlx5/core/en_main.c | 2 ++ drivers/net/ethernet/mellanox/mlx5/core/en_rx.c | 11 +++++++++-- 3 files changed, 17 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en.h b/drivers/net/ethernet/mellanox/mlx5/core/en.h index 303e6cdf9fcd..6e24e821a1d8 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en.h +++ b/drivers/net/ethernet/mellanox/mlx5/core/en.h @@ -189,6 +189,7 @@ static const char vport_strings[][ETH_GSTRING_LEN] = { "rx_wqe_err", "rx_mpwqe_filler", "rx_mpwqe_frag", + "rx_buff_alloc_err", }; struct mlx5e_vport_stats { @@ -232,8 +233,9 @@ struct mlx5e_vport_stats { u64 rx_wqe_err; u64 rx_mpwqe_filler; u64 rx_mpwqe_frag; + u64 rx_buff_alloc_err; -#define NUM_VPORT_COUNTERS 37 +#define NUM_VPORT_COUNTERS 38 }; static const char pport_strings[][ETH_GSTRING_LEN] = { @@ -329,6 +331,7 @@ static const char rq_stats_strings[][ETH_GSTRING_LEN] = { "wqe_err", "mpwqe_filler", "mpwqe_frag", + "buff_alloc_err", }; struct mlx5e_rq_stats { @@ -341,7 +344,8 @@ struct mlx5e_rq_stats { u64 wqe_err; u64 mpwqe_filler; u64 mpwqe_frag; -#define NUM_RQ_STATS 9 + u64 buff_alloc_err; +#define NUM_RQ_STATS 10 }; static const char sq_stats_strings[][ETH_GSTRING_LEN] = { diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c index 9b17bc064cc8..d485d1e4e100 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c @@ -180,6 +180,7 @@ void mlx5e_update_stats(struct mlx5e_priv *priv) s->rx_wqe_err = 0; s->rx_mpwqe_filler = 0; s->rx_mpwqe_frag = 0; + s->rx_buff_alloc_err = 0; for (i = 0; i < priv->params.num_channels; i++) { rq_stats = &priv->channel[i]->rq.stats; @@ -192,6 +193,7 @@ void mlx5e_update_stats(struct mlx5e_priv *priv) s->rx_wqe_err += rq_stats->wqe_err; s->rx_mpwqe_filler += rq_stats->mpwqe_filler; s->rx_mpwqe_frag += rq_stats->mpwqe_frag; + s->rx_buff_alloc_err += rq_stats->buff_alloc_err; for (j = 0; j < priv->params.num_tc; j++) { sq_stats = &priv->channel[i]->sq[j].stats; diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c index ee5fa16aafd1..918b7c7fd74f 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c @@ -447,9 +447,14 @@ bool mlx5e_post_rx_wqes(struct mlx5e_rq *rq) while (!mlx5_wq_ll_is_full(wq)) { struct mlx5e_rx_wqe *wqe = mlx5_wq_ll_get_wqe(wq, wq->head); + int err; - if (unlikely(rq->alloc_wqe(rq, wqe, wq->head))) + err = rq->alloc_wqe(rq, wqe, wq->head); + if (unlikely(err)) { + if (err != -EBUSY) + rq->stats.buff_alloc_err++; break; + } mlx5_wq_ll_push(wq, be16_to_cpu(wqe->next.next_wqe_index)); } @@ -701,8 +706,10 @@ void mlx5e_handle_rx_cqe_mpwrq(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe) skb = napi_alloc_skb(rq->cq.napi, ALIGN(MLX5_MPWRQ_SMALL_PACKET_THRESHOLD, sizeof(long))); - if (unlikely(!skb)) + if (unlikely(!skb)) { + rq->stats.buff_alloc_err++; goto mpwrq_cqe_out; + } prefetch(skb->data); cqe_bcnt = mpwrq_get_cqe_byte_cnt(cqe);