netdev - [net-next PATCH 4/4] octeontx2-af: Set proper errorcode for IPv4 checksum errors

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Date:   Mon, 30 Aug 2021 23:30:46 +0530
From:   Subbaraya Sundeep <sbhatta@...vell.com>
To:     <davem@...emloft.net>, <kuba@...nel.org>, <netdev@...r.kernel.org>
CC:     <sgoutham@...vell.com>, <hkelam@...vell.com>, <gakula@...vell.com>,
        Subbaraya Sundeep <sbhatta@...vell.com>
Subject: [net-next PATCH 4/4] octeontx2-af: Set proper errorcode for IPv4 checksum errors

From: Sunil Goutham <sgoutham@...vell.com>

With current config, for packets with IPv4 checksum errors,
errorcode is being set to UNKNOWN. Hence added a separate
errorcodes for outer and inner IPv4 checksum and changed
NPC configuration accordingly.

Also turn on L2 multicast address check in NPC protocol check block.

Fixes: 6b3321bacc5a ("octeontx2-af: Enable packet length and csum validation")
Signed-off-by: Sunil Goutham <sgoutham@...vell.com>
Signed-off-by: Subbaraya Sundeep <sbhatta@...vell.com>
---
 drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
index 4d94bd0..5efb417 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
@@ -2020,14 +2020,15 @@ int rvu_npc_init(struct rvu *rvu)
 
 	/* Enable below for Rx pkts.
 	 * - Outer IPv4 header checksum validation.
-	 * - Detect outer L2 broadcast address and set NPC_RESULT_S[L2M].
+	 * - Detect outer L2 broadcast address and set NPC_RESULT_S[L2B].
+	 * - Detect outer L2 multicast address and set NPC_RESULT_S[L2M].
 	 * - Inner IPv4 header checksum validation.
 	 * - Set non zero checksum error code value
 	 */
 	rvu_write64(rvu, blkaddr, NPC_AF_PCK_CFG,
 		    rvu_read64(rvu, blkaddr, NPC_AF_PCK_CFG) |
-		    BIT_ULL(32) | BIT_ULL(24) | BIT_ULL(6) |
-		    BIT_ULL(2) | BIT_ULL(1));
+		    ((u64)NPC_EC_OIP4_CSUM << 32) | (NPC_EC_IIP4_CSUM << 24) |
+		    BIT_ULL(7) | BIT_ULL(6) | BIT_ULL(2) | BIT_ULL(1));
 
 	rvu_npc_setup_interfaces(rvu, blkaddr);
 
-- 
2.7.4