[PATCH v3 04/13] net/txgbe: fix driver load bit to inform firmware

[Jiawen Wu <jiawenwu@trustnetic.com>]

Drv_load bit will be reset to default 0 after hardware LAN reset,
reconfigure it to inform firmware that driver is loaded. And set it to 0
when device is closed.

Fixes: b1f596677d8e ("net/txgbe: support device start")
Cc: stable@dpdk.org

Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
---
 drivers/net/txgbe/txgbe_ethdev.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/txgbe/txgbe_ethdev.c b/drivers/net/txgbe/txgbe_ethdev.c
index 2834468764..4aa3bfd0bc 100644
--- a/drivers/net/txgbe/txgbe_ethdev.c
+++ b/drivers/net/txgbe/txgbe_ethdev.c
@@ -331,6 +331,8 @@ txgbe_pf_reset_hw(struct txgbe_hw *hw)
 	status = hw->mac.reset_hw(hw);
 
 	ctrl_ext = rd32(hw, TXGBE_PORTCTL);
+	/* let hardware know driver is loaded */
+	ctrl_ext |= TXGBE_PORTCTL_DRVLOAD;
 	/* Set PF Reset Done bit so PF/VF Mail Ops can work */
 	ctrl_ext |= TXGBE_PORTCTL_RSTDONE;
 	wr32(hw, TXGBE_PORTCTL, ctrl_ext);
@@ -2061,6 +2063,9 @@ txgbe_dev_close(struct rte_eth_dev *dev)
 
 	ret = txgbe_dev_stop(dev);
 
+	/* Let firmware take over control of hardware */
+	wr32m(hw, TXGBE_PORTCTL, TXGBE_PORTCTL_DRVLOAD, 0);
+
 	txgbe_dev_free_queues(dev);
 
 	txgbe_set_pcie_master(hw, false);
-- 
2.27.0