netdev - [PATCH v2 10/17] octeontx2-af: Enable packet length and csum validation

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Date:   Mon, 22 Oct 2018 23:25:57 +0530
From:   sunil.kovvuri@...il.com
To:     netdev@...r.kernel.org, davem@...emloft.net
Cc:     arnd@...db.de, linux-soc@...r.kernel.org,
        Sunil Goutham <sgoutham@...vell.com>
Subject: [PATCH v2 10/17] octeontx2-af: Enable packet length and csum validation

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

Config NPC layer info from KPU profile into protocol
checker to identify outer L2/IPv4/TCP/UDP headers in a
packet. And enable IPv4 checksum validation.

L3/L4 and L4 CSUM validation will be enabled by PF/VF
drivers by configuring NIX_AF_LF(0..127)_RX_CFG via mbox
i.e 'nix_lf_alloc_req->rx_cfg'

Also enable setting of NPC_RESULT_S[L2B] when an outer
L2 broadcast address is detected. This will help in
installing NPC MCAM rules for broadcast packets.

Signed-off-by: Sunil Goutham <sgoutham@...vell.com>
---
 drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c | 14 ++++++++++++++
 drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c | 14 ++++++++++++++
 2 files changed, 28 insertions(+)

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
index 7de5417..02e1d16 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
@@ -14,6 +14,7 @@
 #include "rvu_struct.h"
 #include "rvu_reg.h"
 #include "rvu.h"
+#include "npc.h"
 #include "cgx.h"
 
 static int nix_update_bcast_mce_list(struct rvu *rvu, u16 pcifunc, bool add);
@@ -1630,6 +1631,19 @@ int rvu_nix_init(struct rvu *rvu)
 		err = nix_setup_mcast(rvu, hw->nix0, blkaddr);
 		if (err)
 			return err;
+
+		/* Config Outer L2, IP, TCP and UDP's NPC layer info.
+		 * This helps HW protocol checker to identify headers
+		 * and validate length and checksums.
+		 */
+		rvu_write64(rvu, blkaddr, NIX_AF_RX_DEF_OL2,
+			    (NPC_LID_LA << 8) | (NPC_LT_LA_ETHER << 4) | 0x0F);
+		rvu_write64(rvu, blkaddr, NIX_AF_RX_DEF_OUDP,
+			    (NPC_LID_LD << 8) | (NPC_LT_LD_UDP << 4) | 0x0F);
+		rvu_write64(rvu, blkaddr, NIX_AF_RX_DEF_OTCP,
+			    (NPC_LID_LD << 8) | (NPC_LT_LD_TCP << 4) | 0x0F);
+		rvu_write64(rvu, blkaddr, NIX_AF_RX_DEF_OIP4,
+			    (NPC_LID_LC << 8) | (NPC_LT_LC_IP << 4) | 0x0F);
 	}
 	return 0;
 }
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
index a973895..cc1d8c9 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
@@ -220,6 +220,20 @@ int rvu_npc_init(struct rvu *rvu)
 	/* Configure KPU profile */
 	npc_parser_profile_init(rvu, blkaddr);
 
+	/* Config Outer L2, IPv4's NPC layer info */
+	rvu_write64(rvu, blkaddr, NPC_AF_PCK_DEF_OL2,
+		    (NPC_LID_LA << 8) | (NPC_LT_LA_ETHER << 4) | 0x0F);
+	rvu_write64(rvu, blkaddr, NPC_AF_PCK_DEF_OIP4,
+		    (NPC_LID_LC << 8) | (NPC_LT_LC_IP << 4) | 0x0F);
+
+	/* Enable below for Rx pkts.
+	 * - Outer IPv4 header checksum validation.
+	 * - Detect outer L2 broadcast address and set NPC_RESULT_S[L2M].
+	 */
+	rvu_write64(rvu, blkaddr, NPC_AF_PCK_CFG,
+		    rvu_read64(rvu, blkaddr, NPC_AF_PCK_CFG) |
+		    BIT_ULL(6) | BIT_ULL(2));
+
 	return 0;
 }
 
-- 
2.7.4