netdev - [net-next 09/13] net/mlx5e: kTLS, Do not fill edge for the DUMP WQEs in TX flow

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Message-Id: <20200509082856.97337-10-saeedm@mellanox.com>
Date:   Sat,  9 May 2020 01:28:52 -0700
From:   Saeed Mahameed <saeedm@...lanox.com>
To:     "David S. Miller" <davem@...emloft.net>, kuba@...nel.org
Cc:     netdev@...r.kernel.org, Tariq Toukan <tariqt@...lanox.com>,
        Maxim Mikityanskiy <maximmi@...lanox.com>,
        Saeed Mahameed <saeedm@...lanox.com>
Subject: [net-next 09/13] net/mlx5e: kTLS, Do not fill edge for the DUMP WQEs in TX flow

From: Tariq Toukan <tariqt@...lanox.com>

Every single DUMP WQE resides in a single WQEBB.
As the pi is calculated per each one separately, there is
no real need for a contiguous room for them, allow them to populate
different WQ fragments.
This reduces WQ waste and improves its utilization.

Signed-off-by: Tariq Toukan <tariqt@...lanox.com>
Reviewed-by: Maxim Mikityanskiy <maximmi@...lanox.com>
Signed-off-by: Saeed Mahameed <saeedm@...lanox.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c
index efc271e24b03..1c9d0174676d 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c
@@ -272,6 +272,7 @@ tx_post_resync_dump(struct mlx5e_txqsq *sq, skb_frag_t *frag, u32 tisn, bool fir
 	int fsz;
 	u16 pi;
 
+	BUILD_BUG_ON(MLX5E_KTLS_DUMP_WQEBBS != 1);
 	pi = mlx5_wq_cyc_ctr2ix(&sq->wq, sq->pc);
 	wqe = MLX5E_TLS_FETCH_DUMP_WQE(sq, pi);
 
@@ -340,7 +341,6 @@ mlx5e_ktls_tx_handle_ooo(struct mlx5e_ktls_offload_context_tx *priv_tx,
 	struct mlx5e_sq_stats *stats = sq->stats;
 	enum mlx5e_ktls_sync_retval ret;
 	struct tx_sync_info info = {};
-	u8 num_wqebbs;
 	int i = 0;
 
 	ret = tx_sync_info_get(priv_tx, seq, datalen, &info);
@@ -369,9 +369,6 @@ mlx5e_ktls_tx_handle_ooo(struct mlx5e_ktls_offload_context_tx *priv_tx,
 		return MLX5E_KTLS_SYNC_DONE;
 	}
 
-	num_wqebbs = mlx5e_ktls_dumps_num_wqebbs(sq, info.nr_frags, info.sync_len);
-	mlx5e_txqsq_get_next_pi(sq, num_wqebbs);
-
 	for (; i < info.nr_frags; i++) {
 		unsigned int orig_fsz, frag_offset = 0, n = 0;
 		skb_frag_t *f = &info.frags[i];
-- 
2.25.4