[PATCH v2 2/5] net/bnxt: use buf address for external mbuf

[Mohammad Shuab Siddique]

From: Ajit Khaparde <ajit.khaparde at broadcom.com>

Use buf_addr for mbufs from external pool instead of using iova
addresses. Uses rte_pktmbuf_mtod_offset() to compute the buffer
address for both the first segment and subsequent segments when
the mbuf is marked as RTE_MBUF_F_EXTERNAL.

Fixes: 42b883535804 ("net/bnxt: use new API to get IOVA address")
Cc: stable at dpdk.org
Signed-off-by: Ajit Khaparde <ajit.khaparde at broadcom.com>
Signed-off-by: Mohammad Shuab Siddique <mohammad-shuab.siddique at broadcom.com>
---
 drivers/net/bnxt/bnxt_txr.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/net/bnxt/bnxt_txr.c b/drivers/net/bnxt/bnxt_txr.c
index fb5be224d9..51b886c1a6 100644
--- a/drivers/net/bnxt/bnxt_txr.c
+++ b/drivers/net/bnxt/bnxt_txr.c
@@ -325,7 +325,10 @@ static int bnxt_start_xmit(struct rte_mbuf *tx_pkt,
 		txbd->flags_type |= TX_BD_LONG_FLAGS_LHINT_GTE2K;
 	else
 		txbd->flags_type |= lhint_arr[tx_pkt->pkt_len >> 9];
-	txbd->address = rte_cpu_to_le_64(rte_mbuf_data_iova(tx_pkt));
+	if (tx_pkt->ol_flags & RTE_MBUF_F_EXTERNAL)
+		txbd->address = rte_cpu_to_le_64(rte_pktmbuf_mtod_offset(tx_pkt, uint64_t, 0));
+	else
+		txbd->address = rte_cpu_to_le_64(rte_mbuf_data_iova(tx_pkt));
 	*last_txbd = txbd;
 
 	if (long_bd) {
@@ -482,7 +485,11 @@ static int bnxt_start_xmit(struct rte_mbuf *tx_pkt,
 		*tx_buf = m_seg;
 
 		txbd = &txr->tx_desc_ring[prod];
-		txbd->address = rte_cpu_to_le_64(rte_mbuf_data_iova(m_seg));
+		if (m_seg->ol_flags & RTE_MBUF_F_EXTERNAL)
+			txbd->address = rte_cpu_to_le_64(
+				rte_pktmbuf_mtod_offset(m_seg, uint64_t, 0));
+		else
+			txbd->address = rte_cpu_to_le_64(rte_mbuf_data_iova(m_seg));
 		txbd->flags_type = TX_BD_SHORT_TYPE_TX_BD_SHORT;
 		txbd->len = m_seg->data_len;
 
-- 
2.47.3