From: Peng Li <lipeng321@huawei.com>
Date: Fri, 22 Dec 2017 12:21:51 +0800
Subject: net: hns3: add support for set_pauseparam
Patch-mainline: v4.16-rc1
Git-commit: 61387774d96ef5d2c6b876efa6a35c9c124ae4ae
References: bsc#1104353 FATE#326415

This patch adds set_pauseparam support for ethtool cmd.

Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Fuyun Liang <liangfuyun1@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c      |   13 ++
 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c |   83 ++++++++++++++++
 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.c   |    2 
 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.h   |    1 
 4 files changed, 98 insertions(+), 1 deletion(-)

--- a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
@@ -559,6 +559,18 @@ static void hns3_get_pauseparam(struct n
 			&param->rx_pause, &param->tx_pause);
 }
 
+static int hns3_set_pauseparam(struct net_device *netdev,
+			       struct ethtool_pauseparam *param)
+{
+	struct hnae3_handle *h = hns3_get_handle(netdev);
+
+	if (h->ae_algo->ops->set_pauseparam)
+		return h->ae_algo->ops->set_pauseparam(h, param->autoneg,
+						       param->rx_pause,
+						       param->tx_pause);
+	return -EOPNOTSUPP;
+}
+
 static int hns3_get_link_ksettings(struct net_device *netdev,
 				   struct ethtool_link_ksettings *cmd)
 {
@@ -880,6 +892,7 @@ static const struct ethtool_ops hns3_eth
 	.get_ringparam = hns3_get_ringparam,
 	.set_ringparam = hns3_set_ringparam,
 	.get_pauseparam = hns3_get_pauseparam,
+	.set_pauseparam = hns3_set_pauseparam,
 	.get_strings = hns3_get_strings,
 	.get_ethtool_stats = hns3_get_stats,
 	.get_sset_count = hns3_get_sset_count,
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -4660,6 +4660,53 @@ static u32 hclge_get_fw_version(struct h
 	return hdev->fw_version;
 }
 
+static void hclge_set_flowctrl_adv(struct hclge_dev *hdev, u32 rx_en, u32 tx_en)
+{
+	struct phy_device *phydev = hdev->hw.mac.phydev;
+
+	if (!phydev)
+		return;
+
+	phydev->advertising &= ~(ADVERTISED_Pause | ADVERTISED_Asym_Pause);
+
+	if (rx_en)
+		phydev->advertising |= ADVERTISED_Pause | ADVERTISED_Asym_Pause;
+
+	if (tx_en)
+		phydev->advertising ^= ADVERTISED_Asym_Pause;
+}
+
+static int hclge_cfg_pauseparam(struct hclge_dev *hdev, u32 rx_en, u32 tx_en)
+{
+	enum hclge_fc_mode fc_mode;
+	int ret;
+
+	if (rx_en && tx_en)
+		fc_mode = HCLGE_FC_FULL;
+	else if (rx_en && !tx_en)
+		fc_mode = HCLGE_FC_RX_PAUSE;
+	else if (!rx_en && tx_en)
+		fc_mode = HCLGE_FC_TX_PAUSE;
+	else
+		fc_mode = HCLGE_FC_NONE;
+
+	if (hdev->tm_info.fc_mode == HCLGE_FC_PFC) {
+		hdev->fc_mode_last_time = fc_mode;
+		return 0;
+	}
+
+	ret = hclge_mac_pause_en_cfg(hdev, tx_en, rx_en);
+	if (ret) {
+		dev_err(&hdev->pdev->dev, "configure pauseparam error, ret = %d.\n",
+			ret);
+		return ret;
+	}
+
+	hdev->tm_info.fc_mode = fc_mode;
+
+	return 0;
+}
+
 static void hclge_get_pauseparam(struct hnae3_handle *handle, u32 *auto_neg,
 				 u32 *rx_en, u32 *tx_en)
 {
@@ -4689,6 +4736,41 @@ static void hclge_get_pauseparam(struct
 	}
 }
 
+static int hclge_set_pauseparam(struct hnae3_handle *handle, u32 auto_neg,
+				u32 rx_en, u32 tx_en)
+{
+	struct hclge_vport *vport = hclge_get_vport(handle);
+	struct hclge_dev *hdev = vport->back;
+	struct phy_device *phydev = hdev->hw.mac.phydev;
+	u32 fc_autoneg;
+
+	/* Only support flow control negotiation for netdev with
+	 * phy attached for now.
+	 */
+	if (!phydev)
+		return -EOPNOTSUPP;
+
+	fc_autoneg = hclge_get_autoneg(handle);
+	if (auto_neg != fc_autoneg) {
+		dev_info(&hdev->pdev->dev,
+			 "To change autoneg please use: ethtool -s <dev> autoneg <on|off>\n");
+		return -EOPNOTSUPP;
+	}
+
+	if (hdev->tm_info.fc_mode == HCLGE_FC_PFC) {
+		dev_info(&hdev->pdev->dev,
+			 "Priority flow control enabled. Cannot set link flow control.\n");
+		return -EOPNOTSUPP;
+	}
+
+	hclge_set_flowctrl_adv(hdev, rx_en, tx_en);
+
+	if (!fc_autoneg)
+		return hclge_cfg_pauseparam(hdev, rx_en, tx_en);
+
+	return phy_start_aneg(phydev);
+}
+
 static void hclge_get_ksettings_an_result(struct hnae3_handle *handle,
 					  u8 *auto_neg, u32 *speed, u8 *duplex)
 {
@@ -5345,6 +5427,7 @@ static const struct hnae3_ae_ops hclge_o
 	.set_autoneg = hclge_set_autoneg,
 	.get_autoneg = hclge_get_autoneg,
 	.get_pauseparam = hclge_get_pauseparam,
+	.set_pauseparam = hclge_set_pauseparam,
 	.set_mtu = hclge_set_mtu,
 	.reset_queue = hclge_reset_tqp,
 	.get_stats = hclge_get_stats,
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.c
@@ -112,7 +112,7 @@ static int hclge_shaper_para_calc(u32 ir
 	return 0;
 }
 
-static int hclge_mac_pause_en_cfg(struct hclge_dev *hdev, bool tx, bool rx)
+int hclge_mac_pause_en_cfg(struct hclge_dev *hdev, bool tx, bool rx)
 {
 	struct hclge_desc desc;
 
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.h
@@ -118,4 +118,5 @@ void hclge_tm_schd_info_update(struct hc
 int hclge_tm_dwrr_cfg(struct hclge_dev *hdev);
 int hclge_tm_map_cfg(struct hclge_dev *hdev);
 int hclge_tm_init_hw(struct hclge_dev *hdev);
+int hclge_mac_pause_en_cfg(struct hclge_dev *hdev, bool tx, bool rx);
 #endif