[dpdk-dev] [PATCH 3/8] ixgbe: support l2 tunnel config

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

Add support of l2 tunnel configuration.
Support modifying ether type of a type of l2 tunnel.
Support enabling and disabling the support of a type of l2 tunnel.
Only E-tag tunnel is supported now.

Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
---
 drivers/net/ixgbe/ixgbe_ethdev.c | 140 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 140 insertions(+)

diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index 83df0c0..55ab474 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -139,6 +139,10 @@
 #define IXGBE_CYCLECOUNTER_MASK   0xffffffffffffffffULL
 
 #define IXGBE_VT_CTL_POOLING_MODE_MASK         0x00030000
+#define DEFAULT_ETAG_ETYPE                     0x893f
+#define IXGBE_ETAG_ETYPE                       0x00005084
+#define IXGBE_ETAG_ETYPE_MASK                  0x0000ffff
+#define IXGBE_ETAG_ETYPE_VALID                 0x80000000
 
 static int eth_ixgbe_dev_init(struct rte_eth_dev *eth_dev);
 static int eth_ixgbe_dev_uninit(struct rte_eth_dev *eth_dev);
@@ -339,6 +343,14 @@ 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 *l2_tunnel);
+static int ixgbe_dev_l2_tunnel_enable
+	(struct rte_eth_dev *dev,
+	 enum rte_eth_l2_tunnel_type l2_tunnel_type);
+static int ixgbe_dev_l2_tunnel_disable
+	(struct rte_eth_dev *dev,
+	 enum rte_eth_l2_tunnel_type l2_tunnel_type);
 
 /*
  * Define VF Stats MACRO for Non "cleared on read" register
@@ -497,6 +509,9 @@ 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,
+	.l2_tunnel_eth_type_conf = ixgbe_dev_l2_tunnel_eth_type_conf,
+	.l2_tunnel_enable        = ixgbe_dev_l2_tunnel_enable,
+	.l2_tunnel_disable       = ixgbe_dev_l2_tunnel_disable,
 };
 
 /*
@@ -6201,6 +6216,131 @@ ixgbe_dev_get_dcb_info(struct rte_eth_dev *dev,
 	return 0;
 }
 
+/* Update e-tag ether type */
+static int
+ixgbe_update_e_tag_eth_type(struct ixgbe_hw *hw,
+			    uint16_t ether_type)
+{
+	uint32_t etag_etype;
+
+	if (hw->mac.type != ixgbe_mac_X550 &&
+	    hw->mac.type != ixgbe_mac_X550EM_x) {
+		return -ENOTSUP;
+	}
+
+	etag_etype = IXGBE_READ_REG(hw, IXGBE_ETAG_ETYPE);
+	etag_etype &= ~IXGBE_ETAG_ETYPE_MASK;
+	etag_etype |= ether_type;
+	IXGBE_WRITE_REG(hw, IXGBE_ETAG_ETYPE, etag_etype);
+	IXGBE_WRITE_FLUSH(hw);
+
+	return 0;
+}
+
+/* Config l2 tunnel ether type */
+static int
+ixgbe_dev_l2_tunnel_eth_type_conf(struct rte_eth_dev *dev,
+				  struct rte_eth_l2_tunnel *l2_tunnel)
+{
+	int ret = 0;
+	struct ixgbe_hw *hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+
+	if (l2_tunnel == NULL)
+		return -EINVAL;
+
+	switch (l2_tunnel->l2_tunnel_type) {
+	case RTE_L2_TUNNEL_TYPE_E_TAG:
+		ret = ixgbe_update_e_tag_eth_type(hw, l2_tunnel->ether_type);
+		break;
+	default:
+		PMD_DRV_LOG(ERR, "Invalid tunnel type");
+		ret = -1;
+		break;
+	}
+
+	return ret;
+}
+
+/* Enable e-tag tunnel */
+static int
+ixgbe_e_tag_enable(struct ixgbe_hw *hw)
+{
+	uint32_t etag_etype;
+
+	if (hw->mac.type != ixgbe_mac_X550 &&
+	    hw->mac.type != ixgbe_mac_X550EM_x) {
+		return -ENOTSUP;
+	}
+
+	etag_etype = IXGBE_READ_REG(hw, IXGBE_ETAG_ETYPE);
+	etag_etype |= IXGBE_ETAG_ETYPE_VALID;
+	IXGBE_WRITE_REG(hw, IXGBE_ETAG_ETYPE, etag_etype);
+	IXGBE_WRITE_FLUSH(hw);
+
+	return 0;
+}
+
+/* Enable l2 tunnel */
+static int
+ixgbe_dev_l2_tunnel_enable(struct rte_eth_dev *dev,
+			   enum rte_eth_l2_tunnel_type l2_tunnel_type)
+{
+	int ret = 0;
+	struct ixgbe_hw *hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+
+	switch (l2_tunnel_type) {
+	case RTE_L2_TUNNEL_TYPE_E_TAG:
+		ret = ixgbe_e_tag_enable(hw);
+		break;
+	default:
+		PMD_DRV_LOG(ERR, "Invalid tunnel type");
+		ret = -1;
+		break;
+	}
+
+	return ret;
+}
+
+/* Disable e-tag tunnel */
+static int
+ixgbe_e_tag_disable(struct ixgbe_hw *hw)
+{
+	uint32_t etag_etype;
+
+	if (hw->mac.type != ixgbe_mac_X550 &&
+	    hw->mac.type != ixgbe_mac_X550EM_x) {
+		return -ENOTSUP;
+	}
+
+	etag_etype = IXGBE_READ_REG(hw, IXGBE_ETAG_ETYPE);
+	etag_etype &= ~IXGBE_ETAG_ETYPE_VALID;
+	IXGBE_WRITE_REG(hw, IXGBE_ETAG_ETYPE, etag_etype);
+	IXGBE_WRITE_FLUSH(hw);
+
+	return 0;
+}
+
+/* Disable l2 tunnel */
+static int
+ixgbe_dev_l2_tunnel_disable(struct rte_eth_dev *dev,
+			    enum rte_eth_l2_tunnel_type l2_tunnel_type)
+{
+	int ret = 0;
+	struct ixgbe_hw *hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+
+	switch (l2_tunnel_type) {
+	case RTE_L2_TUNNEL_TYPE_E_TAG:
+		ret = ixgbe_e_tag_disable(hw);
+		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