[PATCH 07/12] net/ngbe: fix MAC control frame forwarding

[Jiawen Wu <jiawenwu@trustnetic.com>]

Test failure on the case "test_pause_fwd_port_stop_start", which expect
MAC control frame forwarding setting still working after port stop/start.
Fix the bug to pass the test case.

Fixes: f40e9f0e2278 ("net/ngbe: support flow control")
Cc: stable@dpdk.org

Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
---
 drivers/net/ngbe/base/ngbe_hw.c   | 9 +++++++++
 drivers/net/ngbe/base/ngbe_type.h | 1 +
 drivers/net/ngbe/ngbe_ethdev.c    | 1 +
 3 files changed, 11 insertions(+)

diff --git a/drivers/net/ngbe/base/ngbe_hw.c b/drivers/net/ngbe/base/ngbe_hw.c
index 6688ae6a31..bf09f8a817 100644
--- a/drivers/net/ngbe/base/ngbe_hw.c
+++ b/drivers/net/ngbe/base/ngbe_hw.c
@@ -865,6 +865,15 @@ s32 ngbe_setup_fc_em(struct ngbe_hw *hw)
 		goto out;
 	}
 
+	/*
+	 * Reconfig mac ctrl frame fwd rule to make sure it still
+	 * working after port stop/start.
+	 */
+	wr32m(hw, NGBE_MACRXFLT, NGBE_MACRXFLT_CTL_MASK,
+	      (hw->fc.mac_ctrl_frame_fwd ?
+	       NGBE_MACRXFLT_CTL_NOPS : NGBE_MACRXFLT_CTL_DROP));
+	ngbe_flush(hw);
+
 	err = hw->phy.set_pause_adv(hw, reg_cu);
 
 out:
diff --git a/drivers/net/ngbe/base/ngbe_type.h b/drivers/net/ngbe/base/ngbe_type.h
index 7a3b52ffd4..fc571c7457 100644
--- a/drivers/net/ngbe/base/ngbe_type.h
+++ b/drivers/net/ngbe/base/ngbe_type.h
@@ -112,6 +112,7 @@ struct ngbe_fc_info {
 	u32 high_water; /* Flow Ctrl High-water */
 	u32 low_water; /* Flow Ctrl Low-water */
 	u16 pause_time; /* Flow Control Pause timer */
+	u8 mac_ctrl_frame_fwd; /* Forward MAC control frames */
 	bool send_xon; /* Flow control send XON */
 	bool strict_ieee; /* Strict IEEE mode */
 	bool disable_fc_autoneg; /* Do not autonegotiate FC */
diff --git a/drivers/net/ngbe/ngbe_ethdev.c b/drivers/net/ngbe/ngbe_ethdev.c
index 08e87471f6..a8f847de8d 100644
--- a/drivers/net/ngbe/ngbe_ethdev.c
+++ b/drivers/net/ngbe/ngbe_ethdev.c
@@ -2420,6 +2420,7 @@ ngbe_flow_ctrl_set(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
 	hw->fc.low_water      = fc_conf->low_water;
 	hw->fc.send_xon       = fc_conf->send_xon;
 	hw->fc.disable_fc_autoneg = !fc_conf->autoneg;
+	hw->fc.mac_ctrl_frame_fwd = fc_conf->mac_ctrl_frame_fwd;
 
 	err = hw->mac.fc_enable(hw);
 
-- 
2.48.1