diff options
| author |   Tariq Toukan <tariqt@mellanox.com> | 2018-01-04 13:09:15 +0200 |
|---|---|---|
| committer |   Saeed Mahameed <saeedm@mellanox.com> | 2018-03-30 16:55:07 -0700 |
| commit | ab966d7e4ff988a48b3ad72e7abf903aa840afd1 (patch) | |
| tree | 0dc36aa0c86c03b0588db5df2e0a4e789c9ad529 /drivers/net/ethernet | |
| parent | net/mlx5e: Keep single pre-initialized UMR WQE per RQ (diff) | |
| download | linux-dev-ab966d7e4ff988a48b3ad72e7abf903aa840afd1.tar.xz linux-dev-ab966d7e4ff988a48b3ad72e7abf903aa840afd1.zip | |
net/mlx5e: RX, Recycle buffer of UMR WQEs
Upon a new UMR post, check if the WQE buffer contains
a previous UMR WQE. If so, modify the dynamic fields
instead of a whole WQE overwrite. This saves a memcpy.
In current setting, after 2 WQ cycles (12 UMR posts),
this will always be the case.
No degradation sensed.
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Diffstat (limited to 'drivers/net/ethernet')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/en_rx.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c index 682f9ff9da34..176645762e49 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c @@ -365,6 +365,11 @@ static void mlx5e_post_rx_mpwqe(struct mlx5e_rq *rq) mlx5_wq_ll_update_db_record(wq); } +static inline u16 mlx5e_icosq_wrap_cnt(struct mlx5e_icosq *sq) +{ + return sq->pc >> MLX5E_PARAMS_MINIMUM_LOG_SQ_SIZE; +} + static int mlx5e_alloc_rx_mpwqe(struct mlx5e_rq *rq, u16 ix) { struct mlx5e_mpw_info *wi = &rq->mpwqe.info[ix]; @@ -372,7 +377,6 @@ static int mlx5e_alloc_rx_mpwqe(struct mlx5e_rq *rq, u16 ix) struct mlx5e_icosq *sq = &rq->channel->icosq; struct mlx5_wq_cyc *wq = &sq->wq; struct mlx5e_umr_wqe *umr_wqe; - int cpy = offsetof(struct mlx5e_umr_wqe, inline_mtts); u16 xlt_offset = ix << (MLX5E_LOG_ALIGNED_MPWQE_PPW - 1); int err; u16 pi; @@ -385,7 +389,10 @@ static int mlx5e_alloc_rx_mpwqe(struct mlx5e_rq *rq, u16 ix) } umr_wqe = mlx5_wq_cyc_get_wqe(wq, pi); - memcpy(umr_wqe, &rq->mpwqe.umr_wqe, cpy); + if (unlikely(mlx5e_icosq_wrap_cnt(sq) < 2)) + memcpy(umr_wqe, &rq->mpwqe.umr_wqe, + offsetof(struct mlx5e_umr_wqe, inline_mtts)); + for (i = 0; i < MLX5_MPWRQ_PAGES_PER_WQE; i++, dma_info++) { err = mlx5e_page_alloc_mapped(rq, dma_info); if (unlikely(err)) |