This may be required by some PMDs in offload scenarios.
Fixes: e8a2b5bf92bb ("netdev-dpdk: implement flow offload with rte flow")
Signed-off-by: Ivan Malov <ivan.ma...@arknetworks.am>
---
lib/netdev-dpdk.c | 54 +++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 54 insertions(+)
diff --git a/lib/netdev-dpdk.c b/lib/netdev-dpdk.c
index aa87ee546..3d39a3afd 100644
--- a/lib/netdev-dpdk.c
+++ b/lib/netdev-dpdk.c
@@ -512,6 +512,9 @@ struct netdev_dpdk {
/* Array of vhost rxq states, see vring_state_changed. */
bool *vhost_rxq_enabled;
+
+ /* Ensures that Rx metadata delivery is configured only once. */
+ bool rx_metadata_delivery_configured;
);
PADDED_MEMBERS(CACHE_LINE_SIZE,
@@ -1220,6 +1223,43 @@ 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;
+
+ if (dev->rx_metadata_delivery_configured) {
+ return;
+ }
+
+ /* For the fallback offload (non-"transfer" rules) */
+ rx_metadata |= RTE_ETH_RX_METADATA_USER_MARK;
+
+#ifdef ALLOW_EXPERIMENTAL_API
+ /* For the tunnel offload */
+ rx_metadata |= RTE_ETH_RX_METADATA_TUNNEL_ID;
+#endif /* ALLOW_EXPERIMENTAL_API */
+
+ 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("%s: The NIC will not provide per-packet USER_MARK",
+ netdev_get_name(&dev->up));
+ }
+ if (!(rx_metadata & RTE_ETH_RX_METADATA_TUNNEL_ID)) {
+ VLOG_DBG("%s: The NIC will not provide per-packet TUNNEL_ID",
+ netdev_get_name(&dev->up));
+ }
+ } else {
+ VLOG(ret == -ENOTSUP ? VLL_DBG : VLL_WARN,
+ "%s: Cannot negotiate Rx metadata: %s",
+ netdev_get_name(&dev->up), rte_strerror(-ret));
+ }
+
+ dev->rx_metadata_delivery_configured = true;
+}
+
static int
dpdk_eth_dev_init(struct netdev_dpdk *dev)
OVS_REQUIRES(dev->mutex)
@@ -1233,6 +1273,18 @@ dpdk_eth_dev_init(struct netdev_dpdk *dev)
RTE_ETH_RX_OFFLOAD_TCP_CKSUM |
RTE_ETH_RX_OFFLOAD_IPV4_CKSUM;
+ if (netdev_is_flow_api_enabled()) {
+ /*
+ * 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) {
@@ -1421,6 +1473,8 @@ common_construct(struct netdev *netdev, dpdk_port_t
port_no,
/* Initilize the hardware offload flags to 0 */
dev->hw_ol_features = 0;
+ dev->rx_metadata_delivery_configured = false;
+
dev->flags = NETDEV_UP | NETDEV_PROMISC;
ovs_list_push_back(&dpdk_list, &dev->list_node);
--
2.17.1
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