[PATCH 4/9] net/txgbe: fix to set autoneg for 1G speed

[Jiawen Wu]

Autoneg was always on for 1G speed, fix to set autoneg off.

Fixes: 01c3cf5c85a7 ("net/txgbe: add autoneg control read and write")
Fixes: e4c515a7bc7e ("net/txgbe: add multi-speed link setup")
Cc: stable at dpdk.org

Signed-off-by: Jiawen Wu <jiawenwu at trustnetic.com>
---
 drivers/net/txgbe/base/txgbe_hw.c   | 14 ++++++++++++++
 drivers/net/txgbe/base/txgbe_phy.c  |  4 +++-
 drivers/net/txgbe/base/txgbe_type.h |  1 +
 drivers/net/txgbe/txgbe_ethdev.c    |  2 ++
 4 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/drivers/net/txgbe/base/txgbe_hw.c b/drivers/net/txgbe/base/txgbe_hw.c
index 2952c408fd..d19fd0065d 100644
--- a/drivers/net/txgbe/base/txgbe_hw.c
+++ b/drivers/net/txgbe/base/txgbe_hw.c
@@ -2273,10 +2273,24 @@ s32 txgbe_setup_mac_link_multispeed_fiber(struct txgbe_hw *hw,
 	}
 
 	if (speed & TXGBE_LINK_SPEED_1GB_FULL) {
+		u32 curr_autoneg;
+
 		speedcnt++;
 		if (highest_link_speed == TXGBE_LINK_SPEED_UNKNOWN)
 			highest_link_speed = TXGBE_LINK_SPEED_1GB_FULL;
 
+		status = hw->mac.check_link(hw, &link_speed, &link_up, false);
+		if (status != 0)
+			return status;
+
+		/* If we already have link at this speed, just jump out */
+		if (link_speed == TXGBE_LINK_SPEED_1GB_FULL) {
+			curr_autoneg = rd32_epcs(hw, SR_MII_MMD_CTL);
+			if (link_up && (hw->autoneg ==
+					!!(curr_autoneg & SR_MII_MMD_CTL_AN_EN)))
+				goto out;
+		}
+
 		/* Set the module link speed */
 		switch (hw->phy.media_type) {
 		case txgbe_media_type_fiber:
diff --git a/drivers/net/txgbe/base/txgbe_phy.c b/drivers/net/txgbe/base/txgbe_phy.c
index 1eb45b068a..d87af656d5 100644
--- a/drivers/net/txgbe/base/txgbe_phy.c
+++ b/drivers/net/txgbe/base/txgbe_phy.c
@@ -1402,7 +1402,9 @@ txgbe_set_sgmii_an37_ability(struct txgbe_hw *hw)
 		wr32_epcs(hw, SR_MII_MMD_AN_CTL, 0x0105);
 	wr32_epcs(hw, SR_MII_MMD_DIGI_CTL, 0x0200);
 	value = rd32_epcs(hw, SR_MII_MMD_CTL);
-	value = (value & ~0x1200) | (0x1 << 12) | (0x1 << 9);
+	value = (value & ~0x1200) | (0x1 << 9);
+	if (hw->autoneg)
+		value |= SR_MII_MMD_CTL_AN_EN;
 	wr32_epcs(hw, SR_MII_MMD_CTL, value);
 }
 
diff --git a/drivers/net/txgbe/base/txgbe_type.h b/drivers/net/txgbe/base/txgbe_type.h
index c3486b472f..75e839b7de 100644
--- a/drivers/net/txgbe/base/txgbe_type.h
+++ b/drivers/net/txgbe/base/txgbe_type.h
@@ -783,6 +783,7 @@ struct txgbe_hw {
 	bool allow_unsupported_sfp;
 	bool need_crosstalk_fix;
 	bool dev_start;
+	bool autoneg;
 	struct txgbe_devargs devarg;
 
 	uint64_t isb_dma;
diff --git a/drivers/net/txgbe/txgbe_ethdev.c b/drivers/net/txgbe/txgbe_ethdev.c
index 36c74d353d..962667acdc 100644
--- a/drivers/net/txgbe/txgbe_ethdev.c
+++ b/drivers/net/txgbe/txgbe_ethdev.c
@@ -1821,6 +1821,7 @@ txgbe_dev_start(struct rte_eth_dev *dev)
 		speed = (TXGBE_LINK_SPEED_100M_FULL |
 			 TXGBE_LINK_SPEED_1GB_FULL |
 			 TXGBE_LINK_SPEED_10GB_FULL);
+		hw->autoneg = true;
 	} else {
 		if (*link_speeds & RTE_ETH_LINK_SPEED_10G)
 			speed |= TXGBE_LINK_SPEED_10GB_FULL;
@@ -1832,6 +1833,7 @@ txgbe_dev_start(struct rte_eth_dev *dev)
 			speed |= TXGBE_LINK_SPEED_1GB_FULL;
 		if (*link_speeds & RTE_ETH_LINK_SPEED_100M)
 			speed |= TXGBE_LINK_SPEED_100M_FULL;
+		hw->autoneg = false;
 	}
 
 	err = hw->mac.setup_link(hw, speed, link_up);
-- 
2.27.0