From: Yanglong Wu <yanglong.wu@intel.com>
Date: Tue, 2 Jan 2018 02:41:23 +0000 (+0800)
Subject: net/i40e: support MAC loopback
X-Git-Tag: spdx-start~534
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=3a838ab649dfb2248f76dc2fefa74d0c912885c3;p=dpdk.git

net/i40e: support MAC loopback

According to loopback mode, setup loopback link or not.
If loopback link is set, packets transmitted will be
looped back to received side directly.

Signed-off-by: Yanglong Wu <yanglong.wu@intel.com>
Acked-by: Beilei Xing <beilei.xing@intel.com>
---

diff --git a/doc/guides/rel_notes/release_18_02.rst b/doc/guides/rel_notes/release_18_02.rst
index 24b67bb8b1..f3f196bbf5 100644
--- a/doc/guides/rel_notes/release_18_02.rst
+++ b/doc/guides/rel_notes/release_18_02.rst
@@ -41,6 +41,12 @@ New Features
      Also, make sure to start the actual text at the margin.
      =========================================================
 
+* **Add MAC loopback support for i40e.**
+
+  Add MAC loopback support for i40e in order to support test task asked by
+  users. According to the device configuration, it will setup TX->RX loopback
+  link or not.
+
 
 API Changes
 -----------
diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index 0bb1af7706..6a0d77dcf3 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -2019,6 +2019,16 @@ i40e_dev_start(struct rte_eth_dev *dev)
 		}
 	}
 
+	/* Enable mac loopback mode */
+	if (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(ERR, "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 |
diff --git a/drivers/net/i40e/i40e_ethdev.h b/drivers/net/i40e/i40e_ethdev.h
index ab661a97d5..52a13ca379 100644
--- a/drivers/net/i40e/i40e_ethdev.h
+++ b/drivers/net/i40e/i40e_ethdev.h
@@ -32,7 +32,8 @@
 #define I40E_NUM_MACADDR_MAX       64
 /* Maximum number of VFs */
 #define I40E_MAX_VF               128
-
+/*flag of no loopback*/
+#define I40E_AQ_LB_MODE_NONE	  0x0
 /*
  * vlan_id is a 12 bit number.
  * The VFTA array is actually a 4096 bit array, 128 of 32bit elements.