[dpdk-dev] [RFC PATCH 06/17] virtio: Use software vlan stripping

[Ouyang Changchun <changchun.ouyang@intel.com>]

Implement VLAN stripping in software. This allows application
to be device independent.

Signed-off-by: Changchun Ouyang <changchun.ouyang@intel.com>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 lib/librte_ether/rte_ethdev.h         |  3 +++
 lib/librte_pmd_virtio/virtio_ethdev.c |  2 ++
 lib/librte_pmd_virtio/virtio_pci.h    |  1 +
 lib/librte_pmd_virtio/virtio_rxtx.c   | 20 ++++++++++++++++++--
 4 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h
index f66805d..07d55b8 100644
--- a/lib/librte_ether/rte_ethdev.h
+++ b/lib/librte_ether/rte_ethdev.h
@@ -643,6 +643,9 @@ struct rte_eth_rxconf {
 #define ETH_TXQ_FLAGS_NOOFFLOADS \
 		(ETH_TXQ_FLAGS_NOVLANOFFL | ETH_TXQ_FLAGS_NOXSUMSCTP | \
 		 ETH_TXQ_FLAGS_NOXSUMUDP  | ETH_TXQ_FLAGS_NOXSUMTCP)
+#define ETH_TXQ_FLAGS_NOXSUMS \
+		(ETH_TXQ_FLAGS_NOXSUMSCTP | ETH_TXQ_FLAGS_NOXSUMUDP | \
+		 ETH_TXQ_FLAGS_NOXSUMTCP)
 /**
  * A structure used to configure a TX ring of an Ethernet port.
  */
diff --git a/lib/librte_pmd_virtio/virtio_ethdev.c b/lib/librte_pmd_virtio/virtio_ethdev.c
index d37f2e9..829838c 100644
--- a/lib/librte_pmd_virtio/virtio_ethdev.c
+++ b/lib/librte_pmd_virtio/virtio_ethdev.c
@@ -1064,6 +1064,8 @@ virtio_dev_configure(struct rte_eth_dev *dev)
 		return (-EINVAL);
 	}
 
+	hw->vlan_strip = rxmode->hw_vlan_strip;
+
 	ret = vtpci_irq_config(hw, 0);
 	if (ret != 0)
 		PMD_DRV_LOG(ERR, "failed to set config vector");
diff --git a/lib/librte_pmd_virtio/virtio_pci.h b/lib/librte_pmd_virtio/virtio_pci.h
index 6998737..6d93fac 100644
--- a/lib/librte_pmd_virtio/virtio_pci.h
+++ b/lib/librte_pmd_virtio/virtio_pci.h
@@ -168,6 +168,7 @@ struct virtio_hw {
 	uint32_t    max_tx_queues;
 	uint32_t    max_rx_queues;
 	uint16_t    vtnet_hdr_size;
+	uint8_t	    vlan_strip;
 	uint8_t	    use_msix;
 	uint8_t     mac_addr[ETHER_ADDR_LEN];
 };
diff --git a/lib/librte_pmd_virtio/virtio_rxtx.c b/lib/librte_pmd_virtio/virtio_rxtx.c
index f878c62..a5756e1 100644
--- a/lib/librte_pmd_virtio/virtio_rxtx.c
+++ b/lib/librte_pmd_virtio/virtio_rxtx.c
@@ -49,6 +49,7 @@
 #include <rte_prefetch.h>
 #include <rte_string_fns.h>
 #include <rte_errno.h>
+#include <rte_byteorder.h>
 
 #include "virtio_logs.h"
 #include "virtio_ethdev.h"
@@ -408,8 +409,8 @@ virtio_dev_tx_queue_setup(struct rte_eth_dev *dev,
 
 	PMD_INIT_FUNC_TRACE();
 
-	if ((tx_conf->txq_flags & ETH_TXQ_FLAGS_NOOFFLOADS)
-	    != ETH_TXQ_FLAGS_NOOFFLOADS) {
+	if ((tx_conf->txq_flags & ETH_TXQ_FLAGS_NOXSUMS)
+	    != ETH_TXQ_FLAGS_NOXSUMS) {
 		PMD_INIT_LOG(ERR, "TX checksum offload not supported\n");
 		return -EINVAL;
 	}
@@ -446,6 +447,7 @@ uint16_t
 virtio_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
 {
 	struct virtqueue *rxvq = rx_queue;
+	struct virtio_hw *hw = rxvq->hw;
 	struct rte_mbuf *rxm, *new_mbuf;
 	uint16_t nb_used, num, nb_rx = 0;
 	uint32_t len[VIRTIO_MBUF_BURST_SZ];
@@ -489,6 +491,9 @@ virtio_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
 		rxm->pkt_len = (uint32_t)(len[i] - hdr_size);
 		rxm->data_len = (uint16_t)(len[i] - hdr_size);
 
+		if (hw->vlan_strip)
+			rte_vlan_strip(rxm);
+
 		VIRTIO_DUMP_PACKET(rxm, rxm->data_len);
 
 		rx_pkts[nb_rx++] = rxm;
@@ -717,6 +722,17 @@ virtio_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
 		 */
 		if (likely(need <= 0)) {
 			txm = tx_pkts[nb_tx];
+
+			/* Do VLAN tag insertion */
+			if (txm->ol_flags & PKT_TX_VLAN_PKT) {
+				error = rte_vlan_insert(&txm);
+				if (unlikely(error)) {
+					rte_pktmbuf_free(txm);
+					++nb_tx;
+					continue;
+				}
+			}
+
 			/* Enqueue Packet buffers */
 			error = virtqueue_enqueue_xmit(txvq, txm);
 			if (unlikely(error)) {
-- 
1.8.4.2