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From: Bharat Bhushan <bbhushan2@marvell.com>
To: <netdev@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <sgoutham@marvell.com>, <gakula@marvell.com>, <sbhatta@marvell.com>,
        <hkelam@marvell.com>, <davem@davemloft.net>, <edumazet@google.com>,
        <kuba@kernel.org>, <pabeni@redhat.com>, <jerinj@marvell.com>,
        <lcherian@marvell.com>, <richardcochran@gmail.com>
CC: Bharat Bhushan <bbhushan2@marvell.com>
Subject: [net-next,v2 7/8] cn10k-ipsec: Allow inline ipsec offload for skb with SA
Date: Mon, 13 May 2024 16:24:45 +0530
Message-ID: <20240513105446.297451-8-bbhushan2@marvell.com>
In-Reply-To: <20240513105446.297451-1-bbhushan2@marvell.com>
References: <20240513105446.297451-1-bbhushan2@marvell.com>
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Allow to use hardware offload for outbound inline ipsec
if security association (SA) is set for a given skb.

Signed-off-by: Bharat Bhushan <bbhushan2@marvell.com>
---
 .../ethernet/marvell/octeontx2/nic/cn10k_ipsec.c  | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/cn10k_ipsec.c b/drivers/net/ethernet/marvell/octeontx2/nic/cn10k_ipsec.c
index 91c83a2ba6b1..5375bffe8a90 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/cn10k_ipsec.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/cn10k_ipsec.c
@@ -768,9 +768,24 @@ static void cn10k_ipsec_del_state(struct xfrm_state *x)
 	mutex_unlock(&pf->ipsec.lock);
 }
 
+static bool cn10k_ipsec_offload_ok(struct sk_buff *skb, struct xfrm_state *x)
+{
+	if (x->props.family == AF_INET) {
+		/* Offload with IPv4 options is not supported yet */
+		if (ip_hdr(skb)->ihl > 5)
+			return false;
+	} else {
+		/* Offload with IPv6 extension headers is not support yet */
+		if (ipv6_ext_hdr(ipv6_hdr(skb)->nexthdr))
+			return false;
+	}
+	return true;
+}
+
 static const struct xfrmdev_ops cn10k_ipsec_xfrmdev_ops = {
 	.xdo_dev_state_add	= cn10k_ipsec_add_state,
 	.xdo_dev_state_delete	= cn10k_ipsec_del_state,
+	.xdo_dev_offload_ok	= cn10k_ipsec_offload_ok,
 };
 
 int cn10k_ipsec_ethtool_init(struct net_device *netdev, bool enable)
-- 
2.34.1