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net/mlx5e: Refactor data-path lro header function

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Refactor function mlx5e_lro_update_hdr() to reduce number of
branches.

Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Tariq Toukan 2017-06-05 11:17:20 +03:00 committed by Saeed Mahameed
parent 4b7dfc9925
commit 604acb193b
2 changed files with 21 additions and 26 deletions
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45
drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
View File

@ -496,56 +496,51 @@ static void mlx5e_lro_update_hdr(struct sk_buff *skb, struct mlx5_cqe64 *cqe,
u32 cqe_bcnt)
{
struct ethhdr *eth = (struct ethhdr *)(skb->data);
struct iphdr *ipv4;
struct ipv6hdr *ipv6;
struct tcphdr *tcp;
int network_depth = 0;
__be16 proto;
u16 tot_len;
void *ip_p;
u8 l4_hdr_type = get_cqe_l4_hdr_type(cqe);
int tcp_ack = ((l4_hdr_type == CQE_L4_HDR_TYPE_TCP_ACK_NO_DATA) ||
(l4_hdr_type == CQE_L4_HDR_TYPE_TCP_ACK_AND_DATA));
u8 tcp_ack = (l4_hdr_type == CQE_L4_HDR_TYPE_TCP_ACK_NO_DATA) ||
(l4_hdr_type == CQE_L4_HDR_TYPE_TCP_ACK_AND_DATA);
skb->mac_len = ETH_HLEN;
proto = __vlan_get_protocol(skb, eth->h_proto, &network_depth);
ipv4 = (struct iphdr *)(skb->data + network_depth);
ipv6 = (struct ipv6hdr *)(skb->data + network_depth);
tot_len = cqe_bcnt - network_depth;
ip_p = skb->data + network_depth;
if (proto == htons(ETH_P_IP)) {
tcp = (struct tcphdr *)(skb->data + network_depth +
sizeof(struct iphdr));
ipv6 = NULL;
struct iphdr *ipv4 = ip_p;
tcp = ip_p + sizeof(struct iphdr);
skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
} else {
tcp = (struct tcphdr *)(skb->data + network_depth +
sizeof(struct ipv6hdr));
ipv4 = NULL;
skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
}
if (get_cqe_lro_tcppsh(cqe))
tcp->psh = 1;
if (tcp_ack) {
tcp->ack = 1;
tcp->ack_seq = cqe->lro_ack_seq_num;
tcp->window = cqe->lro_tcp_win;
}
if (ipv4) {
ipv4->ttl = cqe->lro_min_ttl;
ipv4->tot_len = cpu_to_be16(tot_len);
ipv4->check = 0;
ipv4->check = ip_fast_csum((unsigned char *)ipv4,
ipv4->ihl);
} else {
struct ipv6hdr *ipv6 = ip_p;
tcp = ip_p + sizeof(struct ipv6hdr);
skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
ipv6->hop_limit = cqe->lro_min_ttl;
ipv6->payload_len = cpu_to_be16(tot_len -
sizeof(struct ipv6hdr));
}
tcp->psh = get_cqe_lro_tcppsh(cqe);
if (tcp_ack) {
tcp->ack = 1;
tcp->ack_seq = cqe->lro_ack_seq_num;
tcp->window = cqe->lro_tcp_win;
}
}
static inline void mlx5e_skb_set_hash(struct mlx5_cqe64 *cqe,

2
include/linux/mlx5/device.h
View File

@ -709,7 +709,7 @@ static inline int mlx5_get_cqe_format(struct mlx5_cqe64 *cqe)
return (cqe->op_own >> 2) & 0x3;
}
static inline int get_cqe_lro_tcppsh(struct mlx5_cqe64 *cqe)
static inline u8 get_cqe_lro_tcppsh(struct mlx5_cqe64 *cqe)
{
return (cqe->lro_tcppsh_abort_dupack >> 6) & 1;
}