This may be required by some PMDs in offload scenarios.
Signed-off-by: Ivan Malov <ivan.ma...@arknetworks.am>
---
lib/netdev-dpdk.c | 40 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 40 insertions(+)
diff --git a/lib/netdev-dpdk.c b/lib/netdev-dpdk.c
index fb0dd43f7..2cebc3cca 100644
--- a/lib/netdev-dpdk.c
+++ b/lib/netdev-dpdk.c
@@ -1140,6 +1140,36 @@ dpdk_eth_flow_ctrl_setup(struct netdev_dpdk *dev)
OVS_REQUIRES(dev->mutex)
}
}
+static void
+dpdk_eth_dev_init_rx_metadata(struct netdev_dpdk *dev)
+{
+ uint64_t rx_metadata = 0;
+ int ret;
+
+ /* For the fallback offload (non-"transfer" rules) */
+ rx_metadata |= RTE_ETH_RX_METADATA_USER_MARK;
+ /* For the full offload ("transfer" rules) */
+ rx_metadata |= RTE_ETH_RX_METADATA_TUNNEL_ID;
+
+ ret = rte_eth_rx_metadata_negotiate(dev->port_id, &rx_metadata);
+ if (ret == 0) {
+ if (!(rx_metadata & RTE_ETH_RX_METADATA_USER_MARK)) {
+ VLOG_DBG("The NIC will not provide per-packet USER_MARK on port "
+ DPDK_PORT_ID_FMT, dev->port_id);
+ }
+ if (!(rx_metadata & RTE_ETH_RX_METADATA_TUNNEL_ID)) {
+ VLOG_DBG("The NIC will not provide per-packet TUNNEL_ID on port "
+ DPDK_PORT_ID_FMT, dev->port_id);
+ }
+ } else if (ret == -ENOTSUP) {
+ VLOG_DBG("Rx metadata negotiate procedure is not supported on port "
+ DPDK_PORT_ID_FMT, dev->port_id);
+ } else {
+ VLOG_WARN("Cannot negotiate Rx metadata on port "
+ DPDK_PORT_ID_FMT, dev->port_id);
+ }
+}
+
static int
dpdk_eth_dev_init(struct netdev_dpdk *dev)
OVS_REQUIRES(dev->mutex)
@@ -1154,6 +1184,16 @@ dpdk_eth_dev_init(struct netdev_dpdk *dev)
RTE_ETH_RX_OFFLOAD_TCP_CKSUM |
RTE_ETH_RX_OFFLOAD_IPV4_CKSUM;
+ /*
+ * Full tunnel offload requires that tunnel ID metadata be
+ * delivered with "miss" packets from the hardware to the
+ * PMD. The same goes for megaflow mark metadata which is
+ * used in MARK + RSS offload scenario.
+ *
+ * Request delivery of such metadata.
+ */
+ dpdk_eth_dev_init_rx_metadata(dev);
+
rte_eth_dev_info_get(dev->port_id, &info);
if (strstr(info.driver_name, "vf") != NULL) {
--
2.20.1
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