[dpdk-dev] [PATCH 1/4] ixgbe: support UDP tunnel add/del

[Wenzhuo Lu <wenzhuo.lu@intel.com>]

Add UDP tunnel add/del support on ixgbe. Now it only support
VxLAN port configuration.
Although the VxLAN port has a default value 4789, it can be
changed. We support VxLAN port configuration to meet the
change.
Note, the default value of VxLAN port in ixgbe NICs is 0. So
please set it when using VxLAN off-load.

Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
---
 drivers/net/ixgbe/ixgbe_ethdev.c | 93 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 93 insertions(+)

diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index 4c4c6df..381cbad 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -337,6 +337,10 @@ static int ixgbe_timesync_read_time(struct rte_eth_dev *dev,
 				   struct timespec *timestamp);
 static int ixgbe_timesync_write_time(struct rte_eth_dev *dev,
 				   const struct timespec *timestamp);
+static int ixgbe_dev_udp_tunnel_add(struct rte_eth_dev *dev,
+				    struct rte_eth_udp_tunnel *udp_tunnel);
+static int ixgbe_dev_udp_tunnel_del(struct rte_eth_dev *dev,
+				    struct rte_eth_udp_tunnel *udp_tunnel);
 
 /*
  * Define VF Stats MACRO for Non "cleared on read" register
@@ -495,6 +499,8 @@ static const struct eth_dev_ops ixgbe_eth_dev_ops = {
 	.timesync_adjust_time = ixgbe_timesync_adjust_time,
 	.timesync_read_time   = ixgbe_timesync_read_time,
 	.timesync_write_time  = ixgbe_timesync_write_time,
+	.udp_tunnel_add       = ixgbe_dev_udp_tunnel_add,
+	.udp_tunnel_del       = ixgbe_dev_udp_tunnel_del,
 };
 
 /*
@@ -6191,6 +6197,93 @@ ixgbe_dev_get_dcb_info(struct rte_eth_dev *dev,
 	return 0;
 }
 
+#define DEFAULT_VXLAN_PORT 4789
+
+/* on x550, there's only one register for VxLAN UDP port.
+ * So, we cannot add or del the port. We only update it.
+ */
+static int
+ixgbe_update_vxlan_port(struct ixgbe_hw *hw,
+			uint16_t port)
+{
+	IXGBE_WRITE_REG(hw, IXGBE_VXLANCTRL, port);
+	IXGBE_WRITE_FLUSH(hw);
+
+	return 0;
+}
+
+/* Add UDP tunneling port */
+static int
+ixgbe_dev_udp_tunnel_add(struct rte_eth_dev *dev,
+			 struct rte_eth_udp_tunnel *udp_tunnel)
+{
+	int ret = 0;
+	struct ixgbe_hw *hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+
+	if (hw->mac.type != ixgbe_mac_X550 &&
+	    hw->mac.type != ixgbe_mac_X550EM_x) {
+		return -ENOTSUP;
+	}
+
+	if (udp_tunnel == NULL)
+		return -EINVAL;
+
+	switch (udp_tunnel->prot_type) {
+	case RTE_TUNNEL_TYPE_VXLAN:
+		/* cannot add a port, update the port value */
+		ret = ixgbe_update_vxlan_port(hw, udp_tunnel->udp_port);
+		break;
+
+	case RTE_TUNNEL_TYPE_GENEVE:
+	case RTE_TUNNEL_TYPE_TEREDO:
+		PMD_DRV_LOG(ERR, "Tunnel type is not supported now.");
+		ret = -1;
+		break;
+
+	default:
+		PMD_DRV_LOG(ERR, "Invalid tunnel type");
+		ret = -1;
+		break;
+	}
+
+	return ret;
+}
+
+/* Remove UDP tunneling port */
+static int
+ixgbe_dev_udp_tunnel_del(struct rte_eth_dev *dev,
+			 struct rte_eth_udp_tunnel *udp_tunnel)
+{
+	int ret = 0;
+	struct ixgbe_hw *hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+
+	if (hw->mac.type != ixgbe_mac_X550 &&
+	    hw->mac.type != ixgbe_mac_X550EM_x) {
+		return -ENOTSUP;
+	}
+
+	if (udp_tunnel == NULL)
+		return -EINVAL;
+
+	switch (udp_tunnel->prot_type) {
+	case RTE_TUNNEL_TYPE_VXLAN:
+		/* cannot del the port, reset it to default */
+		ret = ixgbe_update_vxlan_port(hw, DEFAULT_VXLAN_PORT);
+		break;
+	case RTE_TUNNEL_TYPE_GENEVE:
+	case RTE_TUNNEL_TYPE_TEREDO:
+		PMD_DRV_LOG(ERR, "Tunnel type is not supported now.");
+		ret = -1;
+		break;
+	default:
+		PMD_DRV_LOG(ERR, "Invalid tunnel type");
+		ret = -1;
+		break;
+	}
+
+	return ret;
+}
+
 static struct rte_driver rte_ixgbe_driver = {
 	.type = PMD_PDEV,
 	.init = rte_ixgbe_pmd_init,
-- 
1.9.3