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Date: Fri, 1 Jun 2018 17:05:35 -0700
From: Saeed Mahameed <saeedm@...lanox.com>
To: "David S. Miller" <davem@...emloft.net>
Cc: netdev@...r.kernel.org, Tariq Toukan <tariqt@...lanox.com>,
Saeed Mahameed <saeedm@...lanox.com>
Subject: [net-next 08/17] net/mlx5e: TX, Obsolete maintaining local copies of skb->len/data
From: Tariq Toukan <tariqt@...lanox.com>
Instead of maintaining a local copy of skb->len/data and updating
it upon every copy to the WQE inline part, just calculate it once
when needed, using the ihs.
This obsoletes the function mlx5e_tx_skb_pull_inline.
Signed-off-by: Tariq Toukan <tariqt@...lanox.com>
Signed-off-by: Saeed Mahameed <saeedm@...lanox.com>
---
.../net/ethernet/mellanox/mlx5/core/en_tx.c | 42 ++++++-------------
1 file changed, 12 insertions(+), 30 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c
index 725c06221e95..f29deb44bf3b 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c
@@ -188,28 +188,16 @@ static inline u16 mlx5e_calc_min_inline(enum mlx5_inline_modes mode,
return min_t(u16, hlen, skb_headlen(skb));
}
-static inline void mlx5e_tx_skb_pull_inline(unsigned char **skb_data,
- unsigned int *skb_len,
- unsigned int len)
-{
- *skb_len -= len;
- *skb_data += len;
-}
-
-static inline void mlx5e_insert_vlan(void *start, struct sk_buff *skb, u16 ihs,
- unsigned char **skb_data,
- unsigned int *skb_len)
+static inline void mlx5e_insert_vlan(void *start, struct sk_buff *skb, u16 ihs)
{
struct vlan_ethhdr *vhdr = (struct vlan_ethhdr *)start;
int cpy1_sz = 2 * ETH_ALEN;
int cpy2_sz = ihs - cpy1_sz;
- memcpy(vhdr, *skb_data, cpy1_sz);
- mlx5e_tx_skb_pull_inline(skb_data, skb_len, cpy1_sz);
+ memcpy(vhdr, skb->data, cpy1_sz);
vhdr->h_vlan_proto = skb->vlan_proto;
vhdr->h_vlan_TCI = cpu_to_be16(skb_vlan_tag_get(skb));
- memcpy(&vhdr->h_vlan_encapsulated_proto, *skb_data, cpy2_sz);
- mlx5e_tx_skb_pull_inline(skb_data, skb_len, cpy2_sz);
+ memcpy(&vhdr->h_vlan_encapsulated_proto, skb->data + cpy1_sz, cpy2_sz);
}
static inline void
@@ -357,8 +345,6 @@ netdev_tx_t mlx5e_sq_xmit(struct mlx5e_txqsq *sq, struct sk_buff *skb,
struct mlx5e_tx_wqe_info *wi;
struct mlx5e_sq_stats *stats = sq->stats;
- unsigned char *skb_data = skb->data;
- unsigned int skb_len = skb->len;
u16 ds_cnt, ds_cnt_inl = 0;
u16 headlen, ihs, frag_pi;
u8 num_wqebbs, opcode;
@@ -385,7 +371,7 @@ netdev_tx_t mlx5e_sq_xmit(struct mlx5e_txqsq *sq, struct sk_buff *skb,
stats->bytes += num_bytes;
stats->xmit_more += skb->xmit_more;
- headlen = skb_len - ihs - skb->data_len;
+ headlen = skb->len - ihs - skb->data_len;
ds_cnt += !!headlen;
ds_cnt += skb_shinfo(skb)->nr_frags;
@@ -414,15 +400,14 @@ netdev_tx_t 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)) {
- mlx5e_insert_vlan(eseg->inline_hdr.start, skb,
- ihs - VLAN_HLEN, &skb_data, &skb_len);
+ ihs -= VLAN_HLEN;
+ mlx5e_insert_vlan(eseg->inline_hdr.start, skb, ihs);
stats->added_vlan_packets++;
} else {
- memcpy(eseg->inline_hdr.start, skb_data, ihs);
- mlx5e_tx_skb_pull_inline(&skb_data, &skb_len, ihs);
+ memcpy(eseg->inline_hdr.start, skb->data, ihs);
}
- eseg->inline_hdr.sz = cpu_to_be16(ihs);
dseg += ds_cnt_inl;
} else if (skb_vlan_tag_present(skb)) {
eseg->insert.type = cpu_to_be16(MLX5_ETH_WQE_INSERT_VLAN);
@@ -432,7 +417,7 @@ netdev_tx_t mlx5e_sq_xmit(struct mlx5e_txqsq *sq, struct sk_buff *skb,
stats->added_vlan_packets++;
}
- num_dma = mlx5e_txwqe_build_dsegs(sq, skb, skb_data, headlen, dseg);
+ num_dma = mlx5e_txwqe_build_dsegs(sq, skb, skb->data + ihs, headlen, dseg);
if (unlikely(num_dma < 0))
goto err_drop;
@@ -644,8 +629,6 @@ netdev_tx_t mlx5i_sq_xmit(struct mlx5e_txqsq *sq, struct sk_buff *skb,
struct mlx5e_tx_wqe_info *wi;
struct mlx5e_sq_stats *stats = sq->stats;
- unsigned char *skb_data = skb->data;
- unsigned int skb_len = skb->len;
u16 headlen, ihs, pi, frag_pi;
u16 ds_cnt, ds_cnt_inl = 0;
u8 num_wqebbs, opcode;
@@ -672,7 +655,7 @@ netdev_tx_t mlx5i_sq_xmit(struct mlx5e_txqsq *sq, struct sk_buff *skb,
stats->bytes += num_bytes;
stats->xmit_more += skb->xmit_more;
- headlen = skb_len - ihs - skb->data_len;
+ headlen = skb->len - ihs - skb->data_len;
ds_cnt += !!headlen;
ds_cnt += skb_shinfo(skb)->nr_frags;
@@ -704,13 +687,12 @@ netdev_tx_t mlx5i_sq_xmit(struct mlx5e_txqsq *sq, struct sk_buff *skb,
eseg->mss = mss;
if (ihs) {
- memcpy(eseg->inline_hdr.start, skb_data, ihs);
- mlx5e_tx_skb_pull_inline(&skb_data, &skb_len, ihs);
+ memcpy(eseg->inline_hdr.start, skb->data, ihs);
eseg->inline_hdr.sz = cpu_to_be16(ihs);
dseg += ds_cnt_inl;
}
- num_dma = mlx5e_txwqe_build_dsegs(sq, skb, skb_data, headlen, dseg);
+ num_dma = mlx5e_txwqe_build_dsegs(sq, skb, skb->data + ihs, headlen, dseg);
if (unlikely(num_dma < 0))
goto err_drop;
--
2.17.0
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