netdev - [net-next 09/10] net/mlx5e: Move TX code into functions to be used by MPWQE

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Date:   Thu, 3 Sep 2020 14:00:21 -0700
From:   Saeed Mahameed <saeedm@...dia.com>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
CC:     <netdev@...r.kernel.org>,
        Maxim Mikityanskiy <maximmi@...lanox.com>,
        "Saeed Mahameed" <saeedm@...dia.com>
Subject: [net-next 09/10] net/mlx5e: Move TX code into functions to be used by MPWQE

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

mlx5e_txwqe_complete performs some actions that can be taken to separate
functions:

1. Update the flags needed for hardware timestamping.

2. Stop the TX queue if it's full.

Take these actions into separate functions to be reused by the MPWQE
code in the following commit and to maintain clear responsibilities of
functions.

Signed-off-by: Maxim Mikityanskiy <maximmi@...lanox.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
 .../net/ethernet/mellanox/mlx5/core/en_tx.c   | 23 ++++++++++++++-----
 1 file changed, 17 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c
index 9ced350150b3..3b68c8333875 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c
@@ -311,6 +311,20 @@ static inline void mlx5e_sq_calc_wqe_attr(struct sk_buff *skb,
 	};
 }
 
+static inline void mlx5e_tx_skb_update_hwts_flags(struct sk_buff *skb)
+{
+	if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP))
+		skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
+}
+
+static inline void mlx5e_tx_check_stop(struct mlx5e_txqsq *sq)
+{
+	if (unlikely(!mlx5e_wqc_has_room_for(&sq->wq, sq->cc, sq->pc, sq->stop_room))) {
+		netif_tx_stop_queue(sq->txq);
+		sq->stats->stopped++;
+	}
+}
+
 static inline void
 mlx5e_txwqe_complete(struct mlx5e_txqsq *sq, struct sk_buff *skb,
 		     const struct mlx5e_tx_attr *attr,
@@ -332,14 +346,11 @@ mlx5e_txwqe_complete(struct mlx5e_txqsq *sq, struct sk_buff *skb,
 	cseg->opmod_idx_opcode = cpu_to_be32((sq->pc << 8) | attr->opcode);
 	cseg->qpn_ds           = cpu_to_be32((sq->sqn << 8) | wqe_attr->ds_cnt);
 
-	if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP))
-		skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
+	mlx5e_tx_skb_update_hwts_flags(skb);
 
 	sq->pc += wi->num_wqebbs;
-	if (unlikely(!mlx5e_wqc_has_room_for(wq, sq->cc, sq->pc, sq->stop_room))) {
-		netif_tx_stop_queue(sq->txq);
-		sq->stats->stopped++;
-	}
+
+	mlx5e_tx_check_stop(sq);
 
 	send_doorbell = __netdev_tx_sent_queue(sq->txq, attr->num_bytes, xmit_more);
 	if (send_doorbell)
-- 
2.26.2