From: Ananda Sathyanarayana <ananda@versa-networks.com>
Date: Wed, 2 Nov 2016 23:36:55 +0000 (-0700)
Subject: net/e1000: fix forced configuration of speed and duplex
X-Git-Tag: spdx-start~5377
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=6880bdb6c6ec1220303c34591961d613154b89b4;p=dpdk.git

net/e1000: fix forced configuration of speed and duplex

From the code, it looks like, hw->mac.autoneg, variable is used to
switch between calling either autoneg function or forcing
speed/duplex function. But this variable is not modified in
eth_em_start/eth_igb_start routines (it is always set to 1)
even while forcing the link speed.

Following discussion thread has some more information on this:
http://dpdk.org/ml/archives/dev/2016-October/049272.html

Signed-off-by: Ananda Sathyanarayana <ananda@versa-networks.com>
Acked-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
---

diff --git a/drivers/net/e1000/em_ethdev.c b/drivers/net/e1000/em_ethdev.c
index 7cf5f0c482..aee3d340dc 100644
--- a/drivers/net/e1000/em_ethdev.c
+++ b/drivers/net/e1000/em_ethdev.c
@@ -639,6 +639,7 @@ eth_em_start(struct rte_eth_dev *dev)
 	speeds = &dev->data->dev_conf.link_speeds;
 	if (*speeds == ETH_LINK_SPEED_AUTONEG) {
 		hw->phy.autoneg_advertised = E1000_ALL_SPEED_DUPLEX;
+		hw->mac.autoneg = 1;
 	} else {
 		num_speeds = 0;
 		autoneg = (*speeds & ETH_LINK_SPEED_FIXED) == 0;
@@ -674,6 +675,17 @@ eth_em_start(struct rte_eth_dev *dev)
 		}
 		if (num_speeds == 0 || (!autoneg && (num_speeds > 1)))
 			goto error_invalid_config;
+
+		/* Set/reset the mac.autoneg based on the link speed,
+		 * fixed or not
+		 */
+		if (!autoneg) {
+			hw->mac.autoneg = 0;
+			hw->mac.forced_speed_duplex =
+					hw->phy.autoneg_advertised;
+		} else {
+			hw->mac.autoneg = 1;
+		}
 	}
 
 	e1000_setup_link(hw);
diff --git a/drivers/net/e1000/igb_ethdev.c b/drivers/net/e1000/igb_ethdev.c
index 49243962ae..2fddf0cbe8 100644
--- a/drivers/net/e1000/igb_ethdev.c
+++ b/drivers/net/e1000/igb_ethdev.c
@@ -1327,6 +1327,7 @@ eth_igb_start(struct rte_eth_dev *dev)
 	speeds = &dev->data->dev_conf.link_speeds;
 	if (*speeds == ETH_LINK_SPEED_AUTONEG) {
 		hw->phy.autoneg_advertised = E1000_ALL_SPEED_DUPLEX;
+		hw->mac.autoneg = 1;
 	} else {
 		num_speeds = 0;
 		autoneg = (*speeds & ETH_LINK_SPEED_FIXED) == 0;
@@ -1362,6 +1363,17 @@ eth_igb_start(struct rte_eth_dev *dev)
 		}
 		if (num_speeds == 0 || (!autoneg && (num_speeds > 1)))
 			goto error_invalid_config;
+
+		/* Set/reset the mac.autoneg based on the link speed,
+		 * fixed or not
+		 */
+		if (!autoneg) {
+			hw->mac.autoneg = 0;
+			hw->mac.forced_speed_duplex =
+					hw->phy.autoneg_advertised;
+		} else {
+			hw->mac.autoneg = 1;
+		}
 	}
 
 	e1000_setup_link(hw);