netdev - [net-next 06/16] net/mlx5e: Let mlx5e_get_sw_max_sq_mpw

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Date:   Tue, 27 Sep 2022 13:36:01 -0700
From:   Saeed Mahameed <saeed@...nel.org>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Eric Dumazet <edumazet@...gle.com>
Cc:     Saeed Mahameed <saeedm@...dia.com>, netdev@...r.kernel.org,
        Tariq Toukan <tariqt@...dia.com>,
        Maxim Mikityanskiy <maximmi@...dia.com>
Subject: [net-next 06/16] net/mlx5e: Let mlx5e_get_sw_max_sq_mpw_wqebbs accept mdev

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

To shorten and simplify code, let mlx5e_get_sw_max_sq_mpw_wqebbs accept
mdev and derive max SQ WQEBBs from it. Also rename the function to a
more generic name mlx5e_get_max_sq_aligned_wqebbs, because the following
patches will use it in non-MPWQE contexts.

Signed-off-by: Maxim Mikityanskiy <maximmi@...dia.com>
Reviewed-by: Tariq Toukan <tariqt@...dia.com>
Reviewed-by: Saeed Mahameed <saeedm@...dia.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en.h      | 8 ++++----
 drivers/net/ethernet/mellanox/mlx5/core/en_main.c | 6 ++----
 2 files changed, 6 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en.h b/drivers/net/ethernet/mellanox/mlx5/core/en.h
index 881e406d8757..fc595a8ef11f 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en.h
@@ -174,8 +174,7 @@ struct page_pool;
 	ALIGN_DOWN(MLX5E_KLM_MAX_ENTRIES_PER_WQE(wqe_size), MLX5_UMR_KLM_ALIGNMENT)
 
 #define MLX5E_MAX_KLM_PER_WQE(mdev) \
-	MLX5E_KLM_ENTRIES_PER_WQE(MLX5_SEND_WQE_BB * \
-		mlx5e_get_sw_max_sq_mpw_wqebbs(mlx5e_get_max_sq_wqebbs(mdev)))
+	MLX5E_KLM_ENTRIES_PER_WQE(MLX5_SEND_WQE_BB * mlx5e_get_max_sq_aligned_wqebbs(mdev))
 
 #define MLX5E_MSG_LEVEL			NETIF_MSG_LINK
 
@@ -235,7 +234,7 @@ static inline u8 mlx5e_get_max_sq_wqebbs(struct mlx5_core_dev *mdev)
 			 MLX5_CAP_GEN(mdev, max_wqe_sz_sq) / MLX5_SEND_WQE_BB);
 }
 
-static inline u8 mlx5e_get_sw_max_sq_mpw_wqebbs(u8 max_sq_wqebbs)
+static inline u8 mlx5e_get_max_sq_aligned_wqebbs(struct mlx5_core_dev *mdev)
 {
 /* The return value will be multiplied by MLX5_SEND_WQEBB_NUM_DS.
  * Since max_sq_wqebbs may be up to MLX5_SEND_WQE_MAX_WQEBBS == 16,
@@ -244,8 +243,9 @@ static inline u8 mlx5e_get_sw_max_sq_mpw_wqebbs(u8 max_sq_wqebbs)
  * than MLX5_SEND_WQE_MAX_WQEBBS to let a full-session WQE be
  * cache-aligned.
  */
-	u8 wqebbs = min_t(u8, max_sq_wqebbs, MLX5_SEND_WQE_MAX_WQEBBS - 1);
+	u8 wqebbs = mlx5e_get_max_sq_wqebbs(mdev);
 
+	wqebbs = min_t(u8, wqebbs, MLX5_SEND_WQE_MAX_WQEBBS - 1);
 #if L1_CACHE_BYTES >= 128
 	wqebbs = ALIGN_DOWN(wqebbs, 2);
 #endif
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index 73ebb7ff4b26..5391b7ca1d21 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -1156,8 +1156,7 @@ static int mlx5e_alloc_xdpsq(struct mlx5e_channel *c,
 			&c->priv->channel_stats[c->ix]->xdpsq :
 			&c->priv->channel_stats[c->ix]->rq_xdpsq;
 	sq->stop_room = MLX5E_STOP_ROOM(mlx5e_get_max_sq_wqebbs(mdev));
-	sq->max_sq_mpw_wqebbs =
-		mlx5e_get_sw_max_sq_mpw_wqebbs(mlx5e_get_max_sq_wqebbs(mdev));
+	sq->max_sq_mpw_wqebbs = mlx5e_get_max_sq_aligned_wqebbs(mdev);
 
 	param->wq.db_numa_node = cpu_to_node(c->cpu);
 	err = mlx5_wq_cyc_create(mdev, &param->wq, sqc_wq, wq, &sq->wq_ctrl);
@@ -1318,8 +1317,7 @@ static int mlx5e_alloc_txqsq(struct mlx5e_channel *c,
 	sq->uar_map   = mdev->mlx5e_res.hw_objs.bfreg.map;
 	sq->min_inline_mode = params->tx_min_inline_mode;
 	sq->hw_mtu    = MLX5E_SW2HW_MTU(params, params->sw_mtu);
-	sq->max_sq_mpw_wqebbs =
-		mlx5e_get_sw_max_sq_mpw_wqebbs(mlx5e_get_max_sq_wqebbs(mdev));
+	sq->max_sq_mpw_wqebbs = mlx5e_get_max_sq_aligned_wqebbs(mdev);
 	INIT_WORK(&sq->recover_work, mlx5e_tx_err_cqe_work);
 	if (!MLX5_CAP_ETH(mdev, wqe_vlan_insert))
 		set_bit(MLX5E_SQ_STATE_VLAN_NEED_L2_INLINE, &sq->state);
-- 
2.37.3