[dpdk-stable] [18.02 1/2] net/vmxnet3: gather offload data on first and last segment

[Didier Pallard]

[ backported from upstream commit 5e5ac26f958f10ef3f1b443ed74c13898cc82e87 ]

Offloads are split between first and last segment of a packet.
Call a single vmxnet3_rx_offload function that will contain all
offload operations. This patch does not introduce any code modification.

Pass a vmxnet3_hw as parameter to the function, it is not presently
used in this patch, but will be later used for TSO offloads.

Signed-off-by: Didier Pallard <didier.pallard at 6wind.com>
Acked-by: Yong Wang <yongwang at vmware.com>

Conflicts:
	drivers/net/vmxnet3/vmxnet3_rxtx.c : do not change packet type
	behaviour on stable branch; continue to parse packet
	to return precise RTE_PTYPE_L3_IPV4, rather than returning
	RTE_PTYPE_L3_IPV4_UNKNOWN like in master branch.
---
 drivers/net/vmxnet3/vmxnet3_rxtx.c | 66 +++++++++++++++++++++-----------------
 1 file changed, 36 insertions(+), 30 deletions(-)

diff --git a/drivers/net/vmxnet3/vmxnet3_rxtx.c b/drivers/net/vmxnet3/vmxnet3_rxtx.c
index 3a8c62fc16fc..23b69cce1029 100644
--- a/drivers/net/vmxnet3/vmxnet3_rxtx.c
+++ b/drivers/net/vmxnet3/vmxnet3_rxtx.c
@@ -648,34 +648,46 @@ vmxnet3_post_rx_bufs(vmxnet3_rx_queue_t *rxq, uint8_t ring_id)
 
 
 /* Receive side checksum and other offloads */
-static void
-vmxnet3_rx_offload(const Vmxnet3_RxCompDesc *rcd, struct rte_mbuf *rxm)
+static inline void
+vmxnet3_rx_offload(struct vmxnet3_hw *hw, const Vmxnet3_RxCompDesc *rcd,
+		struct rte_mbuf *rxm, const uint8_t sop)
 {
-	/* Check for RSS */
-	if (rcd->rssType != VMXNET3_RCD_RSS_TYPE_NONE) {
-		rxm->ol_flags |= PKT_RX_RSS_HASH;
-		rxm->hash.rss = rcd->rssHash;
-	}
+	(void)hw;
+
+	/* Offloads set in sop */
+	if (sop) {
+		/* Check for RSS */
+		if (rcd->rssType != VMXNET3_RCD_RSS_TYPE_NONE) {
+			rxm->ol_flags |= PKT_RX_RSS_HASH;
+			rxm->hash.rss = rcd->rssHash;
+		}
 
-	/* Check packet type, checksum errors, etc. Only support IPv4 for now. */
-	if (rcd->v4) {
-		struct ether_hdr *eth = rte_pktmbuf_mtod(rxm, struct ether_hdr *);
-		struct ipv4_hdr *ip = (struct ipv4_hdr *)(eth + 1);
+		/* Check packet type, checksum errors. Only IPv4 for now. */
+		if (rcd->v4) {
+			struct ether_hdr *eth = rte_pktmbuf_mtod(rxm, struct ether_hdr *);
+			struct ipv4_hdr *ip = (struct ipv4_hdr *)(eth + 1);
 
-		if (((ip->version_ihl & 0xf) << 2) > (int)sizeof(struct ipv4_hdr))
-			rxm->packet_type = RTE_PTYPE_L3_IPV4_EXT;
-		else
-			rxm->packet_type = RTE_PTYPE_L3_IPV4;
+			if (((ip->version_ihl & 0xf) << 2) > (int)sizeof(struct ipv4_hdr))
+				rxm->packet_type = RTE_PTYPE_L3_IPV4_EXT;
+			else
+				rxm->packet_type = RTE_PTYPE_L3_IPV4;
 
-		if (!rcd->cnc) {
-			if (!rcd->ipc)
-				rxm->ol_flags |= PKT_RX_IP_CKSUM_BAD;
+			if (!rcd->cnc) {
+				if (!rcd->ipc)
+					rxm->ol_flags |= PKT_RX_IP_CKSUM_BAD;
 
-			if ((rcd->tcp || rcd->udp) && !rcd->tuc)
-				rxm->ol_flags |= PKT_RX_L4_CKSUM_BAD;
+				if ((rcd->tcp || rcd->udp) && !rcd->tuc)
+					rxm->ol_flags |= PKT_RX_L4_CKSUM_BAD;
+			}
+		} else {
+			rxm->packet_type = RTE_PTYPE_UNKNOWN;
+		}
+	} else { /* Offloads set in eop */
+		/* Check for hardware stripped VLAN tag */
+		if (rcd->ts) {
+			rxm->ol_flags |= (PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED);
+			rxm->vlan_tci = rte_le_to_cpu_16((uint16_t)rcd->tci);
 		}
-	} else {
-		rxm->packet_type = RTE_PTYPE_UNKNOWN;
 	}
 }
 
@@ -807,7 +819,7 @@ vmxnet3_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
 			}
 
 			rxq->start_seg = rxm;
-			vmxnet3_rx_offload(rcd, rxm);
+			vmxnet3_rx_offload(hw, rcd, rxm, 1);
 		} else {
 			struct rte_mbuf *start = rxq->start_seg;
 
@@ -823,13 +835,7 @@ vmxnet3_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
 		if (rcd->eop) {
 			struct rte_mbuf *start = rxq->start_seg;
 
-			/* Check for hardware stripped VLAN tag */
-			if (rcd->ts) {
-				start->ol_flags |= (PKT_RX_VLAN |
-						PKT_RX_VLAN_STRIPPED);
-				start->vlan_tci = rte_le_to_cpu_16((uint16_t)rcd->tci);
-			}
-
+			vmxnet3_rx_offload(hw, rcd, start, 0);
 			rx_pkts[nb_rx++] = start;
 			rxq->start_seg = NULL;
 		}
-- 
2.11.0