[PATCH v2 1/3] net/mlx5: fix the WQE size calculation for Tx queue

[Bing Zhao]

The txq_calc_wqebb_cnt() should be aligned with the calculation in
the function mlx5_txq_devx_obj_new(). Or when the input descriptor
number is 512, the WQE size will be wrongly considered to be 30 when
no max_inline_data is set. The total number of WQE will be considered
as 256 and that is incorrect.

Fixes: 38b4b397a57d ("net/mlx5: add Tx configuration and setup")
Cc: viacheslavo at mellanox.com

Signed-off-by: Bing Zhao <bingz at nvidia.com>
---
 drivers/net/mlx5/mlx5_txq.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/net/mlx5/mlx5_txq.c b/drivers/net/mlx5/mlx5_txq.c
index 5fee5bc4e8..2fdb472ab3 100644
--- a/drivers/net/mlx5/mlx5_txq.c
+++ b/drivers/net/mlx5/mlx5_txq.c
@@ -706,9 +706,15 @@ txq_calc_wqebb_cnt(struct mlx5_txq_ctrl *txq_ctrl)
 
 	wqe_size = MLX5_WQE_CSEG_SIZE +
 		   MLX5_WQE_ESEG_SIZE +
-		   MLX5_WSEG_SIZE -
-		   MLX5_ESEG_MIN_INLINE_SIZE +
-		   txq_ctrl->max_inline_data;
+		   MLX5_WSEG_SIZE;
+	wqe_size += txq_ctrl->txq.tso_en ?
+		    RTE_ALIGN(txq_ctrl->max_tso_header, MLX5_WSEG_SIZE) : 0;
+	if (txq_ctrl->txq.inlen_send)
+		wqe_size = RTE_MAX(wqe_size, MLX5_WQE_CSEG_SIZE +
+					     MLX5_WQE_ESEG_SIZE +
+					     RTE_ALIGN(txq_ctrl->txq.inlen_send +
+						       sizeof(uint32_t),
+						       MLX5_WSEG_SIZE));
 	return rte_align32pow2(wqe_size * desc) / MLX5_WQE_SIZE;
 }
 
-- 
2.34.1