[dpdk-dev] [PATCH 2/2] net/ixgbe: set fixed flag for exact link speed

[Guinan Sun]

Setting exact link speed makes sense if auto-negotiation is
disabled. Fixed flag is required to disable auto-negotiation.

Signed-off-by: Guinan Sun <guinanx.sun at intel.com>
---
 drivers/net/ixgbe/ixgbe_ethdev.c | 20 +++++++-------------
 1 file changed, 7 insertions(+), 13 deletions(-)

diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index 2c6fd0f13..e1ab1dcab 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -2558,17 +2558,6 @@ ixgbe_dev_start(struct rte_eth_dev *dev)
 
 	PMD_INIT_FUNC_TRACE();
 
-	/* IXGBE devices don't support:
-	*    - half duplex (checked afterwards for valid speeds)
-	*    - fixed speed: TODO implement
-	*/
-	if (dev->data->dev_conf.link_speeds & ETH_LINK_SPEED_FIXED) {
-		PMD_INIT_LOG(ERR,
-		"Invalid link_speeds for port %u, fix speed not supported",
-				dev->data->port_id);
-		return -EINVAL;
-	}
-
 	/* Stop the link setup handler before resetting the HW. */
 	rte_eal_alarm_cancel(ixgbe_dev_setup_link_alarm_handler, dev);
 
@@ -2724,7 +2713,11 @@ ixgbe_dev_start(struct rte_eth_dev *dev)
 	}
 
 	link_speeds = &dev->data->dev_conf.link_speeds;
-	if (*link_speeds & ~allowed_speeds) {
+
+	/* Ignore autoneg flag bit and check the validity of 
+	 * link_speed 
+	 */
+	if (((*link_speeds) >> 1) & ~(allowed_speeds >> 1)) {
 		PMD_INIT_LOG(ERR, "Invalid link setting");
 		goto error;
 	}
@@ -4133,7 +4126,8 @@ ixgbe_dev_link_update_share(struct rte_eth_dev *dev,
 	link.link_status = ETH_LINK_DOWN;
 	link.link_speed = ETH_SPEED_NUM_NONE;
 	link.link_duplex = ETH_LINK_HALF_DUPLEX;
-	link.link_autoneg = ETH_LINK_AUTONEG;
+	link.link_autoneg = !(dev->data->dev_conf.link_speeds &
+			ETH_LINK_SPEED_FIXED);
 
 	hw->mac.get_link_status = true;
 
-- 
2.17.1