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

Yanglong Wu yanglong.wu at intel.com
Mon Nov 20 05:05:31 CET 2017


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.wu at 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



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