[PATCH 06/12] net/txgbe: 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: 69ce8c8a4ce3 ("net/txgbe: support flow control")
Cc: stable@dpdk.org

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

diff --git a/drivers/net/txgbe/base/txgbe_hw.c b/drivers/net/txgbe/base/txgbe_hw.c
index 76b9ee3c0a..42cd0e0e2c 100644
--- a/drivers/net/txgbe/base/txgbe_hw.c
+++ b/drivers/net/txgbe/base/txgbe_hw.c
@@ -226,6 +226,15 @@ s32 txgbe_setup_fc(struct txgbe_hw *hw)
 				      TXGBE_MD_DEV_AUTO_NEG, reg_cu);
 	}
 
+	/*
+	 * Reconfig mac ctrl frame fwd rule to make sure it still
+	 * working after port stop/start.
+	 */
+	wr32m(hw, TXGBE_MACRXFLT, TXGBE_MACRXFLT_CTL_MASK,
+	      (hw->fc.mac_ctrl_frame_fwd ?
+	       TXGBE_MACRXFLT_CTL_NOPS : TXGBE_MACRXFLT_CTL_DROP));
+	txgbe_flush(hw);
+
 	DEBUGOUT("Set up FC; reg = 0x%08X", reg);
 out:
 	return err;
diff --git a/drivers/net/txgbe/base/txgbe_type.h b/drivers/net/txgbe/base/txgbe_type.h
index 383438ea3c..65527a22e7 100644
--- a/drivers/net/txgbe/base/txgbe_type.h
+++ b/drivers/net/txgbe/base/txgbe_type.h
@@ -299,6 +299,7 @@ struct txgbe_fc_info {
 	u32 high_water[TXGBE_DCB_TC_MAX]; /* Flow Ctrl High-water */
 	u32 low_water[TXGBE_DCB_TC_MAX]; /* 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/txgbe/txgbe_ethdev.c b/drivers/net/txgbe/txgbe_ethdev.c
index e5736bf387..b68a0557be 100644
--- a/drivers/net/txgbe/txgbe_ethdev.c
+++ b/drivers/net/txgbe/txgbe_ethdev.c
@@ -3586,6 +3586,7 @@ txgbe_flow_ctrl_set(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
 	hw->fc.low_water[0]   = 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 = txgbe_fc_enable(hw);
 
-- 
2.48.1