ixgbe: configure UDP tunnel port

Add UDP tunnel port add/del support on ixgbe. Now only
support VxLAN port configuration.
Although according to the specification 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>
Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>

diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index ebef7fe..67a4be8 100644 (file)
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -352,6 +352,7 @@ 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_l2_tunnel_eth_type_conf
        (struct rte_eth_dev *dev, struct rte_eth_l2_tunnel_conf *l2_tunnel);
 static int ixgbe_dev_l2_tunnel_offload_set
@@ -363,6 +364,11 @@ static int ixgbe_dev_l2_tunnel_filter_handle(struct rte_eth_dev *dev,
                                             enum rte_filter_op filter_op,
                                             void *arg);
 
+static int ixgbe_dev_udp_tunnel_port_add(struct rte_eth_dev *dev,
+                                        struct rte_eth_udp_tunnel *udp_tunnel);
+static int ixgbe_dev_udp_tunnel_port_del(struct rte_eth_dev *dev,
+                                        struct rte_eth_udp_tunnel *udp_tunnel);
+
 /*
  * Define VF Stats MACRO for Non "cleared on read" register
  */
@@ -522,6 +528,8 @@ static const struct eth_dev_ops ixgbe_eth_dev_ops = {
        .timesync_write_time  = ixgbe_timesync_write_time,
        .l2_tunnel_eth_type_conf = ixgbe_dev_l2_tunnel_eth_type_conf,
        .l2_tunnel_offload_set   = ixgbe_dev_l2_tunnel_offload_set,
+       .udp_tunnel_port_add  = ixgbe_dev_udp_tunnel_port_add,
+       .udp_tunnel_port_del  = ixgbe_dev_udp_tunnel_port_del,
 };
 
 /*
@@ -6793,6 +6801,121 @@ ixgbe_dev_l2_tunnel_offload_set
        return ret;
 }
 
+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;
+}
+
+/* There's only one register for VxLAN UDP port.
+ * So, we cannot add several ports. Will update it.
+ */
+static int
+ixgbe_add_vxlan_port(struct ixgbe_hw *hw,
+                    uint16_t port)
+{
+       if (port == 0) {
+               PMD_DRV_LOG(ERR, "Add VxLAN port 0 is not allowed.");
+               return -EINVAL;
+       }
+
+       return ixgbe_update_vxlan_port(hw, port);
+}
+
+/* We cannot delete the VxLAN port. For there's a register for VxLAN
+ * UDP port, it must have a value.
+ * So, will reset it to the original value 0.
+ */
+static int
+ixgbe_del_vxlan_port(struct ixgbe_hw *hw,
+                    uint16_t port)
+{
+       uint16_t cur_port;
+
+       cur_port = (uint16_t)IXGBE_READ_REG(hw, IXGBE_VXLANCTRL);
+
+       if (cur_port != port) {
+               PMD_DRV_LOG(ERR, "Port %u does not exist.", port);
+               return -EINVAL;
+       }
+
+       return ixgbe_update_vxlan_port(hw, 0);
+}
+
+/* Add UDP tunneling port */
+static int
+ixgbe_dev_udp_tunnel_port_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:
+               ret = ixgbe_add_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 = -EINVAL;
+               break;
+
+       default:
+               PMD_DRV_LOG(ERR, "Invalid tunnel type");
+               ret = -EINVAL;
+               break;
+       }
+
+       return ret;
+}
+
+/* Remove UDP tunneling port */
+static int
+ixgbe_dev_udp_tunnel_port_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:
+               ret = ixgbe_del_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 = -EINVAL;
+               break;
+       default:
+               PMD_DRV_LOG(ERR, "Invalid tunnel type");
+               ret = -EINVAL;
+               break;
+       }
+
+       return ret;
+}
+
 static struct rte_driver rte_ixgbe_driver = {
        .type = PMD_PDEV,
        .init = rte_ixgbe_pmd_init,