linux-kernel - [net-next,v6 7/8] cn10k-ipsec: Allow ipsec crypto offload for skb with SA

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Message-ID: <20240819122348.490445-8-bbhushan2@marvell.com>
Date: Mon, 19 Aug 2024 17:53:47 +0530
From: Bharat Bhushan <bbhushan2@...vell.com>
To: <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <sgoutham@...vell.com>, <gakula@...vell.com>, <sbhatta@...vell.com>,
        <hkelam@...vell.com>, <davem@...emloft.net>, <edumazet@...gle.com>,
        <kuba@...nel.org>, <pabeni@...hat.com>, <jerinj@...vell.com>,
        <lcherian@...vell.com>, <richardcochran@...il.com>,
        <bbhushan2@...vell.com>, b@...a-0016f401.pphosted.com
Subject: [net-next,v6 7/8] cn10k-ipsec: Allow ipsec crypto offload for skb with SA

Allow to use hardware offload for outbound ipsec crypto
mode if security association (SA) is set for a given skb.

Signed-off-by: Bharat Bhushan <bbhushan2@...vell.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 41c200ee940b..6506b9893a33 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/cn10k_ipsec.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/cn10k_ipsec.c
@@ -777,9 +777,24 @@ 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,
 };
 
 static void cn10k_ipsec_sa_wq_handler(struct work_struct *work)
-- 
2.34.1