linux-kernel - [PATCH net,5/6] octeontx2-af: fix issue with IPv4 match for RSS

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Date: Mon, 1 Jul 2024 14:37:45 +0530
From: Srujana Challa <schalla@...vell.com>
To: <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC: <kuba@...nel.org>, <davem@...emloft.net>, <pabeni@...hat.com>,
        <sgoutham@...vell.com>, <lcherian@...vell.com>, <gakula@...vell.com>,
        <jerinj@...vell.com>, <hkelam@...vell.com>, <sbhatta@...vell.com>,
        <schalla@...vell.com>, Satheesh Paul <psatheesh@...vell.com>
Subject: [PATCH net,5/6] octeontx2-af: fix issue with IPv4 match for RSS

From: Satheesh Paul <psatheesh@...vell.com>

While performing RSS based on IPv4, packets with
IPv4 options are not being considered. Adding changes
to match both plain IPv4 and IPv4 with option header.

Fixes: 41a7aa7b800d ("octeontx2-af: NIX Rx flowkey configuration for RSS")
Signed-off-by: Satheesh Paul <psatheesh@...vell.com>
---
 drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
index bf5c9cc3df87..da090d8b9046 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
@@ -3933,7 +3933,7 @@ static int set_flowkey_fields(struct nix_rx_flowkey_alg *alg, u32 flow_cfg)
 			field->hdr_offset = 9; /* offset */
 			field->bytesm1 = 0; /* 1 byte */
 			field->ltype_match = NPC_LT_LC_IP;
-			field->ltype_mask = 0xF;
+			field->ltype_mask = 0xE;
 			break;
 		case NIX_FLOW_KEY_TYPE_IPV4:
 		case NIX_FLOW_KEY_TYPE_INNR_IPV4:
@@ -3961,7 +3961,10 @@ static int set_flowkey_fields(struct nix_rx_flowkey_alg *alg, u32 flow_cfg)
 				}
 			}
 
-			field->ltype_mask = 0xF; /* Match only IPv4 */
+			/* Match only IPv4; both NPC_LT_LC_IP and
+			 * NPC_LT_LC_IP_OPT
+			 */
+			field->ltype_mask = 0xE;
 			keyoff_marker = false;
 			break;
 		case NIX_FLOW_KEY_TYPE_IPV6:
-- 
2.25.1