From: Nithin Dabilpuram <ndabilpuram@marvell.com>
Date: Wed, 25 Sep 2019 04:54:07 +0000 (+0530)
Subject: net/octeontx2: support GRE TSO offload
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=e404f39ca9aff7df0373584d58068d5e39872e0c;p=dpdk.git

net/octeontx2: support GRE TSO offload

Extends existing TSO support to GRE tunnel on the
same SoC revisions.

Signed-off-by: Nithin Dabilpuram <ndabilpuram@marvell.com>
---

diff --git a/drivers/net/octeontx2/otx2_ethdev.c b/drivers/net/octeontx2/otx2_ethdev.c
index 1a6afedf59..4a60f9f742 100644
--- a/drivers/net/octeontx2/otx2_ethdev.c
+++ b/drivers/net/octeontx2/otx2_ethdev.c
@@ -33,7 +33,8 @@ nix_get_tx_offload_capa(struct otx2_eth_dev *dev)
 	if (otx2_dev_is_96xx_A0(dev) || otx2_dev_is_95xx_Ax(dev))
 		capa &= ~(DEV_TX_OFFLOAD_TCP_TSO |
 			  DEV_TX_OFFLOAD_VXLAN_TNL_TSO |
-			  DEV_TX_OFFLOAD_GENEVE_TNL_TSO);
+			  DEV_TX_OFFLOAD_GENEVE_TNL_TSO |
+			  DEV_TX_OFFLOAD_GRE_TNL_TSO);
 	return capa;
 }
 
@@ -655,7 +656,8 @@ nix_tx_offload_flags(struct rte_eth_dev *eth_dev)
 
 	/* Enable Inner and Outer checksum for Tunnel TSO */
 	if (conf & (DEV_TX_OFFLOAD_VXLAN_TNL_TSO |
-		    DEV_TX_OFFLOAD_GENEVE_TNL_TSO))
+		    DEV_TX_OFFLOAD_GENEVE_TNL_TSO |
+		    DEV_TX_OFFLOAD_GRE_TNL_TSO))
 		flags |= (NIX_TX_OFFLOAD_TSO_F |
 			  NIX_TX_OFFLOAD_OL3_OL4_CSUM_F |
 			  NIX_TX_OFFLOAD_L3_L4_CSUM_F);
@@ -1322,6 +1324,61 @@ nix_lso_udp_tun_tcp(struct nix_lso_format_cfg *req,
 	field++;
 }
 
+static void
+nix_lso_tun_tcp(struct nix_lso_format_cfg *req,
+		bool outer_v4, bool inner_v4)
+{
+	volatile struct nix_lso_format *field;
+
+	field = (volatile struct nix_lso_format *)&req->fields[0];
+	req->field_mask = NIX_LSO_FIELD_MASK;
+	/* Outer IPv4/IPv6 len */
+	field->layer = NIX_TXLAYER_OL3;
+	field->offset = outer_v4 ? 2 : 4;
+	field->sizem1 = 1; /* 2B */
+	field->alg = NIX_LSOALG_ADD_PAYLEN;
+	field++;
+	if (outer_v4) {
+		/* IPID */
+		field->layer = NIX_TXLAYER_OL3;
+		field->offset = 4;
+		field->sizem1 = 1;
+		/* Incremented linearly per segment */
+		field->alg = NIX_LSOALG_ADD_SEGNUM;
+		field++;
+	}
+
+	/* Inner IPv4/IPv6 */
+	field->layer = NIX_TXLAYER_IL3;
+	field->offset = inner_v4 ? 2 : 4;
+	field->sizem1 = 1; /* 2B */
+	field->alg = NIX_LSOALG_ADD_PAYLEN;
+	field++;
+	if (inner_v4) {
+		/* IPID field */
+		field->layer = NIX_TXLAYER_IL3;
+		field->offset = 4;
+		field->sizem1 = 1;
+		/* Incremented linearly per segment */
+		field->alg = NIX_LSOALG_ADD_SEGNUM;
+		field++;
+	}
+
+	/* TCP sequence number update */
+	field->layer = NIX_TXLAYER_IL4;
+	field->offset = 4;
+	field->sizem1 = 3; /* 4 bytes */
+	field->alg = NIX_LSOALG_ADD_OFFSET;
+	field++;
+
+	/* TCP flags field */
+	field->layer = NIX_TXLAYER_IL4;
+	field->offset = 12;
+	field->sizem1 = 1;
+	field->alg = NIX_LSOALG_TCP_FLAGS;
+	field++;
+}
+
 static int
 nix_setup_lso_formats(struct otx2_eth_dev *dev)
 {
@@ -1414,6 +1471,56 @@ nix_setup_lso_formats(struct otx2_eth_dev *dev)
 		return -EFAULT;
 	otx2_nix_dbg("udp tun v6v6 fmt=%u\n", base + 5);
 
+	/*
+	 * IPv4/TUN HDR/IPv4/TCP LSO
+	 */
+	req = otx2_mbox_alloc_msg_nix_lso_format_cfg(mbox);
+	nix_lso_tun_tcp(req, true, true);
+	rc = otx2_mbox_process_msg(mbox, (void *)&rsp);
+	if (rc)
+		return rc;
+
+	if (rsp->lso_format_idx != base + 6)
+		return -EFAULT;
+	otx2_nix_dbg("tun v4v4 fmt=%u\n", base + 6);
+
+	/*
+	 * IPv4/TUN HDR/IPv6/TCP LSO
+	 */
+	req = otx2_mbox_alloc_msg_nix_lso_format_cfg(mbox);
+	nix_lso_tun_tcp(req, true, false);
+	rc = otx2_mbox_process_msg(mbox, (void *)&rsp);
+	if (rc)
+		return rc;
+
+	if (rsp->lso_format_idx != base + 7)
+		return -EFAULT;
+	otx2_nix_dbg("tun v4v6 fmt=%u\n", base + 7);
+
+	/*
+	 * IPv6/TUN HDR/IPv4/TCP LSO
+	 */
+	req = otx2_mbox_alloc_msg_nix_lso_format_cfg(mbox);
+	nix_lso_tun_tcp(req, false, true);
+	rc = otx2_mbox_process_msg(mbox, (void *)&rsp);
+	if (rc)
+		return rc;
+
+	if (rsp->lso_format_idx != base + 8)
+		return -EFAULT;
+	otx2_nix_dbg("tun v6v4 fmt=%u\n", base + 8);
+
+	/*
+	 * IPv6/TUN HDR/IPv6/TCP LSO
+	 */
+	req = otx2_mbox_alloc_msg_nix_lso_format_cfg(mbox);
+	nix_lso_tun_tcp(req, false, false);
+	rc = otx2_mbox_process_msg(mbox, (void *)&rsp);
+	if (rc)
+		return rc;
+	if (rsp->lso_format_idx != base + 9)
+		return -EFAULT;
+	otx2_nix_dbg("tun v6v6 fmt=%u\n", base + 9);
 	return 0;
 }
 
diff --git a/drivers/net/octeontx2/otx2_ethdev.h b/drivers/net/octeontx2/otx2_ethdev.h
index 332a66e795..33fa0c60b5 100644
--- a/drivers/net/octeontx2/otx2_ethdev.h
+++ b/drivers/net/octeontx2/otx2_ethdev.h
@@ -130,6 +130,7 @@
 	DEV_TX_OFFLOAD_TCP_TSO		| \
 	DEV_TX_OFFLOAD_VXLAN_TNL_TSO    | \
 	DEV_TX_OFFLOAD_GENEVE_TNL_TSO   | \
+	DEV_TX_OFFLOAD_GRE_TNL_TSO	| \
 	DEV_TX_OFFLOAD_MULTI_SEGS	| \
 	DEV_TX_OFFLOAD_IPV4_CKSUM)
 
diff --git a/drivers/net/octeontx2/otx2_tx.h b/drivers/net/octeontx2/otx2_tx.h
index e9191986a9..04e859bacd 100644
--- a/drivers/net/octeontx2/otx2_tx.h
+++ b/drivers/net/octeontx2/otx2_tx.h
@@ -342,7 +342,7 @@ otx2_nix_xmit_prepare(struct rte_mbuf *m, uint64_t *cmd, const uint16_t flags)
 			w1.il4type = NIX_SENDL4TYPE_TCP_CKSUM;
 			w1.ol4type = is_udp_tun ? NIX_SENDL4TYPE_UDP_CKSUM : 0;
 			/* Update format for UDP tunneled packet */
-			send_hdr_ext->w0.lso_format += (is_udp_tun << 1);
+			send_hdr_ext->w0.lso_format += is_udp_tun ? 2 : 6;
 
 			send_hdr_ext->w0.lso_format +=
 				!!(ol_flags & PKT_TX_OUTER_IPV6) << 1;