[dpdk-dev] [PATCH] net/i40e: i40e support mac loopback

[Yanglong Wu]

According to loopback mode, setup loopback link or not.
If loopback link is setted, packets will be sent to
rx_q from tx_q directly.Loopback mode can be used to
support testing task.

Signed-off-by: Yanglong Wu <yanglong...@intel.com>
---
 drivers/net/i40e/base/i40e_adminq_cmd.h |  1 +
 drivers/net/i40e/i40e_ethdev.c          | 12 +++++++++++
 2 files changed, 13 insertions(+)

diff --git a/drivers/net/i40e/base/i40e_adminq_cmd.h 
b/drivers/net/i40e/base/i40e_adminq_cmd.h
index c36da2a32..8171f877b 100644
--- a/drivers/net/i40e/base/i40e_adminq_cmd.h
+++ b/drivers/net/i40e/base/i40e_adminq_cmd.h
@@ -2128,6 +2128,7 @@ I40E_CHECK_CMD_LENGTH(i40e_aqc_an_advt_reg);
 /* Set Loopback mode (0x0618) */
 struct i40e_aqc_set_lb_mode {
        __le16  lb_mode;
+#define I40E_AQ_LB_MODE_NONE   0x0
 #define I40E_AQ_LB_PHY_LOCAL   0x01
 #define I40E_AQ_LB_PHY_REMOTE  0x02
 #define I40E_AQ_LB_MAC_LOCAL   0x04
diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index f40c463aa..2e6aa9d0d 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -2048,6 +2048,17 @@ i40e_dev_start(struct rte_eth_dev *dev)
                }
        }
 
+       /* Enable mac loopback mode */
+       if (hw->mac.type == I40E_MAC_XL710 &&
+           (dev->data->dev_conf.lpbk_mode == I40E_AQ_LB_MODE_NONE ||
+               dev->data->dev_conf.lpbk_mode == I40E_AQ_LB_PHY_LOCAL)) {
+               ret = i40e_aq_set_lb_modes(hw,
+                                          dev->data->dev_conf.lpbk_mode, NULL);
+                       if (ret != I40E_SUCCESS) {
+                       PMD_DRV_LOG(INFO, "fail to set loopback link");
+                       goto err_up;
+               }
+       }
+
        /* Apply link configure */
        if (dev->data->dev_conf.link_speeds & ~(ETH_LINK_SPEED_100M |
                                ETH_LINK_SPEED_1G | ETH_LINK_SPEED_10G |
-- 
2.11.0