From a150241ccf31f8606f5ceb2208fd421066c17e07 Mon Sep 17 00:00:00 2001
From: Manish Chopra <manish.chopra@caviumnetworks.com>
Date: Fri, 14 Oct 2016 05:19:18 -0400
Subject: [PATCH] qede: GSO support for tunnels with outer csum
This patch adds GSO support for GRE and UDP tunnels
where outer checksums are enabled.
Signed-off-by: Manish Chopra <manish.chopra@caviumnetworks.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@caviumnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/ethernet/qlogic/qede/qede.h | 1 +
drivers/net/ethernet/qlogic/qede/qede_main.c | 26 +++++++++++++++++---
2 files changed, 24 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/qlogic/qede/qede.h b/drivers/net/ethernet/qlogic/qede/qede.h
index 28c0e9f42c9e7..f50e5270ad304 100644
--- a/drivers/net/ethernet/qlogic/qede/qede.h
+++ b/drivers/net/ethernet/qlogic/qede/qede.h
@@ -320,6 +320,7 @@ struct qede_fastpath {
#define XMIT_L4_CSUM BIT(0)
#define XMIT_LSO BIT(1)
#define XMIT_ENC BIT(2)
+#define XMIT_ENC_GSO_L4_CSUM BIT(3)
#define QEDE_CSUM_ERROR BIT(0)
#define QEDE_CSUM_UNNECESSARY BIT(1)
diff --git a/drivers/net/ethernet/qlogic/qede/qede_main.c b/drivers/net/ethernet/qlogic/qede/qede_main.c
index 9866d952e3e14..7d5dc1e15fc44 100644
--- a/drivers/net/ethernet/qlogic/qede/qede_main.c
+++ b/drivers/net/ethernet/qlogic/qede/qede_main.c
@@ -400,8 +400,19 @@ static u32 qede_xmit_type(struct qede_dev *edev,
(ipv6_hdr(skb)->nexthdr == NEXTHDR_IPV6))
*ipv6_ext = 1;
- if (skb->encapsulation)
+ if (skb->encapsulation) {
rc |= XMIT_ENC;
+ if (skb_is_gso(skb)) {
+ unsigned short gso_type = skb_shinfo(skb)->gso_type;
+
+ if ((gso_type & SKB_GSO_UDP_TUNNEL_CSUM) ||
+ (gso_type & SKB_GSO_GRE_CSUM))
+ rc |= XMIT_ENC_GSO_L4_CSUM;
+
+ rc |= XMIT_LSO;
+ return rc;
+ }
+ }
if (skb_is_gso(skb))
rc |= XMIT_LSO;
@@ -637,6 +648,12 @@ static netdev_tx_t qede_start_xmit(struct sk_buff *skb,
if (unlikely(xmit_type & XMIT_ENC)) {
first_bd->data.bd_flags.bitfields |=
1 << ETH_TX_1ST_BD_FLAGS_TUNN_IP_CSUM_SHIFT;
+
+ if (xmit_type & XMIT_ENC_GSO_L4_CSUM) {
+ u8 tmp = ETH_TX_1ST_BD_FLAGS_TUNN_L4_CSUM_SHIFT;
+
+ first_bd->data.bd_flags.bitfields |= 1 << tmp;
+ }
hlen = qede_get_skb_hlen(skb, true);
} else {
first_bd->data.bd_flags.bitfields |=
@@ -2320,11 +2337,14 @@ static void qede_init_ndev(struct qede_dev *edev)
/* Encap features*/
hw_features |= NETIF_F_GSO_GRE | NETIF_F_GSO_UDP_TUNNEL |
- NETIF_F_TSO_ECN;
+ NETIF_F_TSO_ECN | NETIF_F_GSO_UDP_TUNNEL_CSUM |
+ NETIF_F_GSO_GRE_CSUM;
ndev->hw_enc_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
NETIF_F_SG | NETIF_F_TSO | NETIF_F_TSO_ECN |
NETIF_F_TSO6 | NETIF_F_GSO_GRE |
- NETIF_F_GSO_UDP_TUNNEL | NETIF_F_RXCSUM;
+ NETIF_F_GSO_UDP_TUNNEL | NETIF_F_RXCSUM |
+ NETIF_F_GSO_UDP_TUNNEL_CSUM |
+ NETIF_F_GSO_GRE_CSUM;
ndev->vlan_features = hw_features | NETIF_F_RXHASH | NETIF_F_RXCSUM |
NETIF_F_HIGHDMA;
--
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