[PATCH v3 2/4] net/idpf: add splitq jumbo packet handling

[Shetty, Praveen]

From: Praveen Shetty <praveen.shetty at intel.com>

This patch will add the jumbo packets handling in the
idpf_dp_splitq_recv_pkts function.

Signed-off-by: Praveen Shetty <praveen.shetty at intel.com>
Signed-off-by: Dhananjay Shukla <dhananjay.shukla at intel.com>
Signed-off-by: atulpatel261194 <Atul.Patel at intel.com>
---
 drivers/net/intel/idpf/idpf_common_rxtx.c | 50 ++++++++++++++++++-----
 1 file changed, 40 insertions(+), 10 deletions(-)

diff --git a/drivers/net/intel/idpf/idpf_common_rxtx.c b/drivers/net/intel/idpf/idpf_common_rxtx.c
index eb25b091d8..412aff8f5f 100644
--- a/drivers/net/intel/idpf/idpf_common_rxtx.c
+++ b/drivers/net/intel/idpf/idpf_common_rxtx.c
@@ -623,10 +623,12 @@ idpf_dp_splitq_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
 	volatile struct virtchnl2_rx_flex_desc_adv_nic_3 *rx_desc_ring;
 	volatile struct virtchnl2_rx_flex_desc_adv_nic_3 *rx_desc;
 	uint16_t pktlen_gen_bufq_id;
-	struct idpf_rx_queue *rxq;
+	struct idpf_rx_queue *rxq = rx_queue;
 	const uint32_t *ptype_tbl;
 	uint8_t status_err0_qw1;
 	struct idpf_adapter *ad;
+	struct rte_mbuf *first_seg = rxq->pkt_first_seg;
+	struct rte_mbuf *last_seg = rxq->pkt_last_seg;
 	struct rte_mbuf *rxm;
 	uint16_t rx_id_bufq1;
 	uint16_t rx_id_bufq2;
@@ -659,6 +661,7 @@ idpf_dp_splitq_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
 
 		pktlen_gen_bufq_id =
 			rte_le_to_cpu_16(rx_desc->pktlen_gen_bufq_id);
+		status_err0_qw1 = rte_le_to_cpu_16(rx_desc->status_err0_qw1);
 		gen_id = (pktlen_gen_bufq_id &
 			  VIRTCHNL2_RX_FLEX_DESC_ADV_GEN_M) >>
 			VIRTCHNL2_RX_FLEX_DESC_ADV_GEN_S;
@@ -697,16 +700,39 @@ idpf_dp_splitq_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
 		rxm->pkt_len = pkt_len;
 		rxm->data_len = pkt_len;
 		rxm->data_off = RTE_PKTMBUF_HEADROOM;
+
+		/*
+		 * If this is the first buffer of the received packet, set the
+		 * pointer to the first mbuf of the packet and initialize its
+		 * context. Otherwise, update the total length and the number
+		 * of segments of the current scattered packet, and update the
+		 * pointer to the last mbuf of the current packet.
+		 */
+		if (!first_seg) {
+			first_seg = rxm;
+			first_seg->nb_segs = 1;
+			first_seg->pkt_len = pkt_len;
+		} else {
+			first_seg->pkt_len =
+					(uint16_t)(first_seg->pkt_len +
+							pkt_len);
+			first_seg->nb_segs++;
+			last_seg->next = rxm;
+		}
+
+		if (!(status_err0_qw1 & (1 << VIRTCHNL2_RX_FLEX_DESC_ADV_STATUS0_EOF_S))) {
+			last_seg = rxm;
+			continue;
+		}
+
 		rxm->next = NULL;
-		rxm->nb_segs = 1;
-		rxm->port = rxq->port_id;
-		rxm->ol_flags = 0;
-		rxm->packet_type =
+		first_seg->port = rxq->port_id;
+		first_seg->ol_flags = 0;
+		first_seg->packet_type =
 			ptype_tbl[(rte_le_to_cpu_16(rx_desc->ptype_err_fflags0) &
 				   VIRTCHNL2_RX_FLEX_DESC_ADV_PTYPE_M) >>
 				  VIRTCHNL2_RX_FLEX_DESC_ADV_PTYPE_S];
-
-		status_err0_qw1 = rx_desc->status_err0_qw1;
+		status_err0_qw1 = rte_le_to_cpu_16(rx_desc->status_err0_qw1);
 		pkt_flags = idpf_splitq_rx_csum_offload(status_err0_qw1);
 		pkt_flags |= idpf_splitq_rx_rss_offload(rxm, rx_desc);
 		if (idpf_timestamp_dynflag > 0 &&
@@ -719,16 +745,20 @@ idpf_dp_splitq_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
 			*RTE_MBUF_DYNFIELD(rxm,
 					   idpf_timestamp_dynfield_offset,
 					   rte_mbuf_timestamp_t *) = ts_ns;
-			rxm->ol_flags |= idpf_timestamp_dynflag;
+			first_seg->ol_flags |= idpf_timestamp_dynflag;
 		}
 
-		rxm->ol_flags |= pkt_flags;
+		first_seg->ol_flags |= pkt_flags;
 
-		rx_pkts[nb_rx++] = rxm;
+		rx_pkts[nb_rx++] = first_seg;
+
+		first_seg = NULL;
 	}
 
 	if (nb_rx > 0) {
 		rxq->rx_tail = rx_id;
+		rxq->pkt_first_seg = first_seg;
+		rxq->pkt_last_seg = last_seg;
 		if (rx_id_bufq1 != rxq->bufq1->rx_next_avail)
 			rxq->bufq1->rx_next_avail = rx_id_bufq1;
 		if (rx_id_bufq2 != rxq->bufq2->rx_next_avail)
-- 
2.37.3