[PATCH v3 5/9] net/pcap: support Tx offloads

[Stephen Hemminger]

The driver already handles multi-segment mbufs but did not report
that in offload flags. Driver can easily insert vlan tag making
testing easier.

Signed-off-by: Stephen Hemminger <stephen at networkplumber.org>
---
 doc/guides/nics/features/pcap.ini | 1 +
 drivers/net/pcap/pcap_ethdev.c    | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/doc/guides/nics/features/pcap.ini b/doc/guides/nics/features/pcap.ini
index e75bf03051..c4772031be 100644
--- a/doc/guides/nics/features/pcap.ini
+++ b/doc/guides/nics/features/pcap.ini
@@ -10,6 +10,7 @@ Scattered Rx         = Y
 Rx Timestamp         = Y
 Basic stats          = Y
 Stats per queue      = Y
+VLAN offload         = P
 Multiprocess aware   = Y
 FreeBSD              = Y
 Linux                = Y
diff --git a/drivers/net/pcap/pcap_ethdev.c b/drivers/net/pcap/pcap_ethdev.c
index 7002f8034a..fde04bd1b2 100644
--- a/drivers/net/pcap/pcap_ethdev.c
+++ b/drivers/net/pcap/pcap_ethdev.c
@@ -403,6 +403,9 @@ eth_pcap_tx_dumper(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 		if (unlikely(len > mtu))
 			continue;
 
+		if ((mbuf->ol_flags & RTE_MBUF_F_TX_VLAN) && rte_vlan_insert(&mbuf))
+			continue;
+
 		calculate_timestamp(&header.ts);
 		header.len = len;
 		header.caplen = len;
@@ -485,6 +488,9 @@ eth_pcap_tx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 		if (unlikely(len > mtu))
 			continue;
 
+		if ((mbuf->ol_flags & RTE_MBUF_F_TX_VLAN) && rte_vlan_insert(&mbuf))
+			continue;
+
 		/* rte_pktmbuf_read() returns a pointer to the data directly
 		 * in the mbuf (when the mbuf is contiguous) or, otherwise,
 		 * a pointer to temp_data after copying into it.
@@ -741,6 +747,8 @@ eth_dev_info(struct rte_eth_dev *dev,
 	dev_info->min_rx_bufsize = 0;
 	dev_info->min_mtu = RTE_ETHER_MIN_LEN - RTE_ETHER_HDR_LEN - RTE_ETHER_CRC_LEN;
 	dev_info->max_mtu = RTE_ETH_PCAP_SNAPLEN;
+	dev_info->tx_offload_capa = RTE_ETH_TX_OFFLOAD_MULTI_SEGS |
+		RTE_ETH_TX_OFFLOAD_VLAN_INSERT;
 
 	return 0;
 }
-- 
2.51.0