netdev - [net-next 13/15] net/mlx5e: Remove MLX5E_XDP_TX_DS

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Message-Id: <20220318205248.33367-14-saeed@kernel.org>
Date:   Fri, 18 Mar 2022 13:52:46 -0700
From:   Saeed Mahameed <saeed@...nel.org>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev@...r.kernel.org, Maxim Mikityanskiy <maximmi@...dia.com>,
        Saeed Mahameed <saeedm@...dia.com>
Subject: [net-next 13/15] net/mlx5e: Remove MLX5E_XDP_TX_DS_COUNT

From: Maxim Mikityanskiy <maximmi@...dia.com>

After introducing multi-buffer XDP_TX, the MLX5E_XDP_TX_DS_COUNT define
became misleading. It's no longer the DS count of an XDP_TX WQE, this
WQE can be longer because of fragments.

As this define is only used at one place in mlx5e_open_xdpsq(), it's
also not very useful anymore. This commit removes the define and puts
the calculation of ds_count for prefilled single-fragment WQEs inline.

Signed-off-by: Maxim Mikityanskiy <maximmi@...dia.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en/xdp.h  | 1 -
 drivers/net/ethernet/mellanox/mlx5/core/en_main.c | 2 +-
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.h b/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.h
index 4868fa1b82d1..287e17911251 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.h
@@ -38,7 +38,6 @@
 #include "en/txrx.h"
 
 #define MLX5E_XDP_MIN_INLINE (ETH_HLEN + VLAN_HLEN)
-#define MLX5E_XDP_TX_DS_COUNT (MLX5E_TX_WQE_EMPTY_DS_COUNT + 1 /* SG DS */)
 
 #define MLX5E_XDP_INLINE_WQE_MAX_DS_CNT 16
 #define MLX5E_XDP_INLINE_WQE_SZ_THRSD \
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index 3256d2c375c3..2f1dedc721d1 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -1681,7 +1681,7 @@ int mlx5e_open_xdpsq(struct mlx5e_channel *c, struct mlx5e_params *params,
 	mlx5e_set_xmit_fp(sq, param->is_mpw);
 
 	if (!param->is_mpw && !test_bit(MLX5E_SQ_STATE_XDP_MULTIBUF, &sq->state)) {
-		unsigned int ds_cnt = MLX5E_XDP_TX_DS_COUNT;
+		unsigned int ds_cnt = MLX5E_TX_WQE_EMPTY_DS_COUNT + 1;
 		unsigned int inline_hdr_sz = 0;
 		int i;
 
-- 
2.35.1