From: saeed@kernel.org
To: "David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>
Cc: netdev@vger.kernel.org, Maxim Mikityanskiy <maximmi@mellanox.com>,
Tariq Toukan <tariqt@mellanox.com>,
Saeed Mahameed <saeedm@nvidia.com>
Subject: [net-next V3 01/12] net/mlx5e: Refactor inline header size calculation in the TX path
Date: Mon, 21 Sep 2020 19:46:53 -0700 [thread overview]
Message-ID: <20200922024704.544482-2-saeed@kernel.org> (raw)
In-Reply-To: <20200922024704.544482-1-saeed@kernel.org>
From: Maxim Mikityanskiy <maximmi@mellanox.com>
As preparation for the next patch, don't increase ihs to calculate
ds_cnt and then decrease it, but rather calculate the intermediate value
temporarily. This code has the same amount of arithmetic operations, but
now allows to split out ds_cnt calculation, which will be performed in
the next patch.
Signed-off-by: Maxim Mikityanskiy <maximmi@mellanox.com>
Reviewed-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
---
drivers/net/ethernet/mellanox/mlx5/core/en_tx.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c
index da596de3abba..e15aa53ff83e 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c
@@ -307,9 +307,9 @@ void mlx5e_sq_xmit(struct mlx5e_txqsq *sq, struct sk_buff *skb,
ds_cnt += skb_shinfo(skb)->nr_frags;
if (ihs) {
- ihs += !!skb_vlan_tag_present(skb) * VLAN_HLEN;
+ u16 inl = ihs + !!skb_vlan_tag_present(skb) * VLAN_HLEN - INL_HDR_START_SZ;
- ds_cnt_inl = DIV_ROUND_UP(ihs - INL_HDR_START_SZ, MLX5_SEND_WQE_DS);
+ ds_cnt_inl = DIV_ROUND_UP(inl, MLX5_SEND_WQE_DS);
ds_cnt += ds_cnt_inl;
}
@@ -348,12 +348,12 @@ void mlx5e_sq_xmit(struct mlx5e_txqsq *sq, struct sk_buff *skb,
eseg->mss = mss;
if (ihs) {
- eseg->inline_hdr.sz = cpu_to_be16(ihs);
if (skb_vlan_tag_present(skb)) {
- ihs -= VLAN_HLEN;
+ eseg->inline_hdr.sz = cpu_to_be16(ihs + VLAN_HLEN);
mlx5e_insert_vlan(eseg->inline_hdr.start, skb, ihs);
stats->added_vlan_packets++;
} else {
+ eseg->inline_hdr.sz = cpu_to_be16(ihs);
memcpy(eseg->inline_hdr.start, skb->data, ihs);
}
dseg += ds_cnt_inl;
--
2.26.2
next prev parent reply other threads:[~2020-09-22 2:47 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-22 2:46 [pull request][net-next V3 00/12] mlx5 Multi packet tx descriptors for SKBs saeed
2020-09-22 2:46 ` saeed [this message]
2020-09-22 2:46 ` [net-next V3 02/12] net/mlx5e: Use struct assignment to initialize mlx5e_tx_wqe_info saeed
2020-09-22 2:46 ` [net-next V3 03/12] net/mlx5e: Move mlx5e_tx_wqe_inline_mode to en_tx.c saeed
2020-09-22 2:46 ` [net-next V3 04/12] net/mlx5e: Refactor xmit functions saeed
2020-09-22 2:46 ` [net-next V3 05/12] net/mlx5e: Small improvements for XDP TX MPWQE logic saeed
2020-09-22 2:46 ` [net-next V3 06/12] net/mlx5e: Unify constants for WQE_EMPTY_DS_COUNT saeed
2020-09-22 2:46 ` [net-next V3 07/12] net/mlx5e: Move the TLS resync check out of the function saeed
2020-09-22 2:47 ` [net-next V3 08/12] net/mlx5e: Support multiple SKBs in a TX WQE saeed
2020-09-22 2:47 ` [net-next V3 09/12] net/mlx5e: Generalize TX MPWQE checks for full session saeed
2020-09-22 2:47 ` [net-next V3 10/12] net/mlx5e: Rename xmit-related structs to generalize them saeed
2020-09-22 2:47 ` [net-next V3 11/12] net/mlx5e: Move TX code into functions to be used by MPWQE saeed
2020-09-22 2:47 ` [net-next V3 12/12] net/mlx5e: Enhanced TX MPWQE for SKBs saeed
2020-09-23 0:45 ` [pull request][net-next V3 00/12] mlx5 Multi packet tx descriptors " David Miller
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