linux-kernel - [PATCH net-next 7/7] net: hns3: keep MAC pause mode when multiple TCs are enabled

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Message-ID: <1606466842-57749-8-git-send-email-tanhuazhong@huawei.com>
Date:   Fri, 27 Nov 2020 16:47:22 +0800
From:   Huazhong Tan <tanhuazhong@...wei.com>
To:     <davem@...emloft.net>
CC:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <salil.mehta@...wei.com>, <yisen.zhuang@...wei.com>,
        <linuxarm@...wei.com>, <kuba@...nel.org>,
        Yonglong Liu <liuyonglong@...wei.com>,
        Huazhong Tan <tanhuazhong@...wei.com>
Subject: [PATCH net-next 7/7] net: hns3: keep MAC pause mode when multiple TCs are enabled

From: Yonglong Liu <liuyonglong@...wei.com>

Bellow HNAE3_DEVICE_VERSION_V3, MAC pause mode just support one
TC, when enabled multiple TCs, force enable PFC mode.

HNAE3_DEVICE_VERSION_V3 can support MAC pause mode on multiple
TCs, so when enable multiple TCs, just keep MAC pause mode,
and enable PFC mode just according to the user settings.

Signed-off-by: Yonglong Liu <liuyonglong@...wei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@...wei.com>
---
 .../net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.c  | 23 +++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.c
index 54767b0..b1026cd 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.c
@@ -715,7 +715,7 @@ static void hclge_tm_pg_info_init(struct hclge_dev *hdev)
 	}
 }
 
-static void hclge_pfc_info_init(struct hclge_dev *hdev)
+static void hclge_update_fc_mode_by_dcb_flag(struct hclge_dev *hdev)
 {
 	if (!(hdev->flag & HCLGE_FLAG_DCB_ENABLE)) {
 		if (hdev->fc_mode_last_time == HCLGE_FC_PFC)
@@ -733,6 +733,27 @@ static void hclge_pfc_info_init(struct hclge_dev *hdev)
 	}
 }
 
+static void hclge_update_fc_mode(struct hclge_dev *hdev)
+{
+	if (!hdev->tm_info.pfc_en) {
+		hdev->tm_info.fc_mode = hdev->fc_mode_last_time;
+		return;
+	}
+
+	if (hdev->tm_info.fc_mode != HCLGE_FC_PFC) {
+		hdev->fc_mode_last_time = hdev->tm_info.fc_mode;
+		hdev->tm_info.fc_mode = HCLGE_FC_PFC;
+	}
+}
+
+static void hclge_pfc_info_init(struct hclge_dev *hdev)
+{
+	if (hdev->ae_dev->dev_version >= HNAE3_DEVICE_VERSION_V3)
+		hclge_update_fc_mode(hdev);
+	else
+		hclge_update_fc_mode_by_dcb_flag(hdev);
+}
+
 static void hclge_tm_schd_info_init(struct hclge_dev *hdev)
 {
 	hclge_tm_pg_info_init(hdev);
-- 
2.7.4