From 820a3f4acbcd266b9f46fe127fa3846cecb4d93d Mon Sep 17 00:00:00 2001
From: liujie-answer <liujie5@linkdatatechnology.com>
Date: Sat, 29 Aug 2026 06:35:00 +0000
Subject: [PATCH 148/153] net/sxe2: add Rx buffer split support

Program split type and header length for supported packet types.

Signed-off-by: liujie-answer <liujie5@linkdatatechnology.com>
---
 drivers/net/sxe2/sxe2_cmd_chnl.c | 115 +++++++++++++++++++++++++++++++
 1 file changed, 115 insertions(+)

diff --git a/drivers/net/sxe2/sxe2_cmd_chnl.c b/drivers/net/sxe2/sxe2_cmd_chnl.c
index f73d50b..6133fea 100644
--- a/drivers/net/sxe2/sxe2_cmd_chnl.c
+++ b/drivers/net/sxe2/sxe2_cmd_chnl.c
@@ -193,6 +193,110 @@ int32_t sxe2_drv_vsi_del(struct sxe2_adapter *adapter, struct sxe2_vsi *vsi)
 #define SXE2_RXQ_CTXT_CFG_BUF_LEN_ALIGN  (1 << 7)
 #define SXE2_RX_HDR_SIZE 256
 
+static int32_t sxe2_rxq_buf_split_fill(struct sxe2_rx_queue *rxq,
+		struct sxe2_drv_rxq_ctxt *ctxt)
+{
+	uint32_t proto_hdr;
+	int32_t ret = 0;
+
+	if (!(rxq->offloads & RTE_ETH_RX_OFFLOAD_BUFFER_SPLIT)) {
+		ctxt->hdr_len = 0;
+		ctxt->split_type_mask = 0;
+		goto l_end;
+	}
+
+	proto_hdr = rxq->rx_seg[0].proto_hdr;
+	if (proto_hdr == RTE_PTYPE_UNKNOWN) {
+		PMD_LOG_ERR(RX, "Buffer split protocol must be configured");
+		ret = -EINVAL;
+		goto l_end;
+	}
+
+	switch (proto_hdr & RTE_PTYPE_L4_MASK) {
+	case RTE_PTYPE_L4_TCP:
+		ctxt->split_type_mask = SXE2_PTYPE_L4_TCP;
+		ctxt->hdr_len = SXE2_RX_HDR_SIZE;
+		goto l_end;
+	case RTE_PTYPE_L4_UDP:
+		ctxt->split_type_mask = SXE2_PTYPE_L4_UDP;
+		ctxt->hdr_len = SXE2_RX_HDR_SIZE;
+		goto l_end;
+	case RTE_PTYPE_L4_SCTP:
+		ctxt->split_type_mask = SXE2_PTYPE_L4_SCTP;
+		ctxt->hdr_len = SXE2_RX_HDR_SIZE;
+		goto l_end;
+	default:
+		break;
+	}
+
+	switch (proto_hdr & RTE_PTYPE_L3_MASK) {
+	case RTE_PTYPE_L3_IPV4_EXT_UNKNOWN:
+		ctxt->split_type_mask = SXE2_PTYPE_L3_IPV4;
+		ctxt->hdr_len = SXE2_RX_HDR_SIZE;
+		goto l_end;
+	case RTE_PTYPE_L3_IPV6_EXT_UNKNOWN:
+		ctxt->split_type_mask = SXE2_PTYPE_L3_IPV6;
+		ctxt->hdr_len = SXE2_RX_HDR_SIZE;
+		goto l_end;
+	default:
+		break;
+	}
+
+	if ((proto_hdr & RTE_PTYPE_L2_MASK) == RTE_PTYPE_L2_ETHER) {
+		ctxt->split_type_mask = SXE2_PTYPE_L2_ETHER;
+		ctxt->hdr_len = SXE2_RX_HDR_SIZE;
+		goto l_end;
+	}
+
+	switch (proto_hdr & RTE_PTYPE_INNER_L4_MASK) {
+	case RTE_PTYPE_INNER_L4_TCP:
+		ctxt->split_type_mask = SXE2_PTYPE_INNER_L4_TCP;
+		ctxt->hdr_len = SXE2_RX_HDR_SIZE;
+		goto l_end;
+	case RTE_PTYPE_INNER_L4_UDP:
+		ctxt->split_type_mask = SXE2_PTYPE_INNER_L4_UDP;
+		ctxt->hdr_len = SXE2_RX_HDR_SIZE;
+		goto l_end;
+	case RTE_PTYPE_INNER_L4_SCTP:
+		ctxt->split_type_mask = SXE2_PTYPE_INNER_L4_SCTP;
+		ctxt->hdr_len = SXE2_RX_HDR_SIZE;
+		goto l_end;
+	default:
+		break;
+	}
+
+	switch (proto_hdr & RTE_PTYPE_INNER_L3_MASK) {
+	case RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN:
+		ctxt->split_type_mask = SXE2_PTYPE_INNER_L3_IPV4;
+		ctxt->hdr_len = SXE2_RX_HDR_SIZE;
+		goto l_end;
+	case RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN:
+		ctxt->split_type_mask = SXE2_PTYPE_INNER_L3_IPV6;
+		ctxt->hdr_len = SXE2_RX_HDR_SIZE;
+		goto l_end;
+	default:
+		break;
+	}
+
+	if ((proto_hdr & RTE_PTYPE_INNER_L2_MASK) == RTE_PTYPE_INNER_L2_ETHER) {
+		ctxt->split_type_mask = SXE2_PTYPE_INNER_L2_ETHER;
+		ctxt->hdr_len = SXE2_RX_HDR_SIZE;
+		goto l_end;
+	}
+
+	if ((proto_hdr & RTE_PTYPE_TUNNEL_MASK) == RTE_PTYPE_TUNNEL_GRENAT) {
+		ctxt->split_type_mask = SXE2_PTYPE_TUNNEL_GRENAT;
+		ctxt->hdr_len = SXE2_RX_HDR_SIZE;
+		goto l_end;
+	}
+
+	PMD_LOG_ERR(RX, "Buffer split protocol is not supported");
+	ret = -EINVAL;
+
+l_end:
+	return ret;
+}
+
 static int32_t sxe2_rxq_ctxt_cfg_fill(struct sxe2_rx_queue *rxq,
 		struct sxe2_drv_rxq_cfg_req *req, uint16_t rxq_cnt)
 {
@@ -226,7 +330,18 @@ static int32_t sxe2_rxq_ctxt_cfg_fill(struct sxe2_rx_queue *rxq,
 	else
 		ctxt->keep_crc_en = 0;
 
+	if (rxq->offloads & RTE_ETH_RX_OFFLOAD_BUFFER_SPLIT) {
+		ret = sxe2_rxq_buf_split_fill(rxq, ctxt);
+		if (ret)
+			goto l_end;
+		ctxt->split_en = 1;
+	} else {
+		ctxt->split_en = 0;
+	}
+
 	ctxt->desc_size = sizeof(union sxe2_rx_desc);
+
+l_end:
 	return ret;
 }
 
-- 
2.43.0