From b0390009502b0c635f9ddc26a16025268f6c6211 Mon Sep 17 00:00:00 2001 From: Gatis Peisenieks Date: Thu, 13 May 2021 14:43:25 +0300 Subject: [PATCH] atl1c: enable rx csum offload on Mikrotik 10/25G NIC Mikrotik 10/25G NIC supports hw checksum verification on rx for IP/IPv6 + TCP/UDP packets. HW checksum offload helps reduce host cpu load. This enables the csum offload specifically for Mikrotik 10/25G NIC as other HW supported by the driver is known to have problems with it. TCP iperf3 to Threadripper 3960X with NIC improved 16.5 -> 20.0 Gbps with mtu=1500. Signed-off-by: Gatis Peisenieks Signed-off-by: David S. Miller --- drivers/net/ethernet/atheros/atl1c/atl1c.h | 2 ++ drivers/net/ethernet/atheros/atl1c/atl1c_main.c | 5 +++++ 2 files changed, 7 insertions(+) diff --git a/drivers/net/ethernet/atheros/atl1c/atl1c.h b/drivers/net/ethernet/atheros/atl1c/atl1c.h index 3fda7eb3bd69..9d70cb7544f1 100644 --- a/drivers/net/ethernet/atheros/atl1c/atl1c.h +++ b/drivers/net/ethernet/atheros/atl1c/atl1c.h @@ -241,6 +241,8 @@ struct atl1c_tpd_ext_desc { #define RRS_PACKET_PROT_IS_IPV6_ONLY(word) \ ((((word) >> RRS_PROT_ID_SHIFT) & RRS_PROT_ID_MASK) == 6) +#define RRS_MT_PROT_ID_TCPUDP BIT(19) + struct atl1c_recv_ret_status { __le32 word0; __le32 rss_hash; diff --git a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c index dbafd8118a86..9693da5028cf 100644 --- a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c +++ b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c @@ -1671,6 +1671,11 @@ static irqreturn_t atl1c_intr(int irq, void *data) static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter, struct sk_buff *skb, struct atl1c_recv_ret_status *prrs) { + if (adapter->hw.nic_type == athr_mt) { + if (prrs->word3 & RRS_MT_PROT_ID_TCPUDP) + skb->ip_summed = CHECKSUM_UNNECESSARY; + return; + } /* * The pid field in RRS in not correct sometimes, so we * cannot figure out if the packet is fragmented or not, -- 2.11.0