From: Jie Liu <[email protected]>

The V4 branch dropped sxe2_rxq_buf_split_fill() and the buffer split
handling in sxe2_rxq_ctxt_cfg_fill(), so the Rx buffer split offload
(RTE_ETH_RX_OFFLOAD_BUFFER_SPLIT) is advertised in device info but
the per-queue context never configures split_en/split_type_mask/
hdr_len, and buffer split packets are not handled correctly.

Restore the sxe2_rxq_buf_split_fill() helper and the buffer split
branch in sxe2_rxq_ctxt_cfg_fill(), matching the V3 implementation.

Fixes: d8e4e075acb4 ("net/sxe2: add probing skeleton")
Cc: [email protected]
Cc: [email protected]
Signed-off-by: Jie Liu <[email protected]>
---
 drivers/net/sxe2/sxe2_cmd_chnl.c | 88 ++++++++++++++++++++++++++++++++
 1 file changed, 88 insertions(+)

diff --git a/drivers/net/sxe2/sxe2_cmd_chnl.c b/drivers/net/sxe2/sxe2_cmd_chnl.c
index b17d80d917..ce74af87cc 100644
--- a/drivers/net/sxe2/sxe2_cmd_chnl.c
+++ b/drivers/net/sxe2/sxe2_cmd_chnl.c
@@ -194,6 +194,84 @@ 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;
+
+       proto_hdr = rxq->rx_seg[0].proto_hdr;
+       if (proto_hdr == RTE_PTYPE_UNKNOWN) {
+               PMD_LOG_ERR(RX, "Buffer split protocol must be configured");
+               return -EINVAL;
+       }
+
+       switch (proto_hdr & RTE_PTYPE_L4_MASK) {
+       case RTE_PTYPE_L4_TCP:
+               ctxt->split_type_mask = SXE2_PTYPE_L4_TCP;
+               goto l_end;
+       case RTE_PTYPE_L4_UDP:
+               ctxt->split_type_mask = SXE2_PTYPE_L4_UDP;
+               goto l_end;
+       case RTE_PTYPE_L4_SCTP:
+               ctxt->split_type_mask = SXE2_PTYPE_L4_SCTP;
+               goto l_end;
+       }
+
+       switch (proto_hdr & RTE_PTYPE_L3_MASK) {
+       case RTE_PTYPE_L3_IPV4_EXT_UNKNOWN:
+               ctxt->split_type_mask = SXE2_PTYPE_L3_IPV4;
+               goto l_end;
+       case RTE_PTYPE_L3_IPV6_EXT_UNKNOWN:
+               ctxt->split_type_mask = SXE2_PTYPE_L3_IPV6;
+               goto l_end;
+       }
+
+       switch (proto_hdr & RTE_PTYPE_L2_MASK) {
+       case RTE_PTYPE_L2_ETHER:
+               ctxt->split_type_mask = SXE2_PTYPE_L2_ETHER;
+               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;
+               goto l_end;
+       case RTE_PTYPE_INNER_L4_UDP:
+               ctxt->split_type_mask = SXE2_PTYPE_INNER_L4_UDP;
+               goto l_end;
+       case RTE_PTYPE_INNER_L4_SCTP:
+               ctxt->split_type_mask = SXE2_PTYPE_INNER_L4_SCTP;
+               goto l_end;
+       }
+
+       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;
+               goto l_end;
+       case RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN:
+               ctxt->split_type_mask = SXE2_PTYPE_INNER_L3_IPV6;
+               goto l_end;
+       }
+
+       switch (proto_hdr & RTE_PTYPE_INNER_L2_MASK) {
+       case RTE_PTYPE_INNER_L2_ETHER:
+               ctxt->split_type_mask = SXE2_PTYPE_INNER_L2_ETHER;
+               goto l_end;
+       }
+
+       switch (proto_hdr & RTE_PTYPE_TUNNEL_MASK) {
+       case RTE_PTYPE_TUNNEL_GRENAT:
+               ctxt->split_type_mask = SXE2_PTYPE_TUNNEL_GRENAT;
+               goto l_end;
+       }
+
+       PMD_LOG_ERR(RX, "Buffer split protocol is not supported");
+       return -ENOTSUP;
+l_end:
+       ctxt->hdr_len = SXE2_RX_HDR_SIZE;
+       return 0;
+}
+
 static int32_t sxe2_rxq_ctxt_cfg_fill(struct sxe2_rx_queue *rxq,
                struct sxe2_drv_rxq_cfg_req *req, uint16_t rxq_cnt)
 {
@@ -227,7 +305,17 @@ 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;
 }
 
-- 
2.52.0

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