linux-kernel - [PATCH net-next 02/12] net: hns3: enable DCB when TC num is one and pfc

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Date:   Fri, 28 Jun 2019 19:50:08 +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>, Yunsheng Lin <linyunsheng@...wei.com>,
        Peng Li <lipeng321@...wei.com>,
        Huazhong Tan <tanhuazhong@...wei.com>
Subject: [PATCH net-next 02/12] net: hns3: enable DCB when TC num is one and pfc_en is non-zero

From: Yunsheng Lin <linyunsheng@...wei.com>

Currently when TC num is one, the DCB will be disabled no matter if
pfc_en is non-zero or not.

This patch enables the DCB if pfc_en is non-zero, even when TC num
is one.

Signed-off-by: Yunsheng Lin <linyunsheng@...wei.com>
Signed-off-by: Peng Li <lipeng321@...wei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@...wei.com>
---
 .../net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c    |  2 ++
 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.c | 19 +++++++++++++++++--
 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.h |  1 +
 3 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c
index 1161361..bac4ce1 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c
@@ -325,6 +325,8 @@ static int hclge_ieee_setpfc(struct hnae3_handle *h, struct ieee_pfc *pfc)
 	hdev->tm_info.hw_pfc_map = pfc_map;
 	hdev->tm_info.pfc_en = pfc->pfc_en;
 
+	hclge_tm_pfc_info_update(hdev);
+
 	return hclge_pause_setup_hw(hdev, false);
 }
 
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.c
index 9edae5f..cb2fb5a 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.c
@@ -597,8 +597,10 @@ static void hclge_tm_tc_info_init(struct hclge_dev *hdev)
 		hdev->tm_info.prio_tc[i] =
 			(i >= hdev->tm_info.num_tc) ? 0 : i;
 
-	/* DCB is enabled if we have more than 1 TC */
-	if (hdev->tm_info.num_tc > 1)
+	/* DCB is enabled if we have more than 1 TC or pfc_en is
+	 * non-zero.
+	 */
+	if (hdev->tm_info.num_tc > 1 || hdev->tm_info.pfc_en)
 		hdev->flag |= HCLGE_FLAG_DCB_ENABLE;
 	else
 		hdev->flag &= ~HCLGE_FLAG_DCB_ENABLE;
@@ -1388,6 +1390,19 @@ void hclge_tm_schd_info_update(struct hclge_dev *hdev, u8 num_tc)
 	hclge_tm_schd_info_init(hdev);
 }
 
+void hclge_tm_pfc_info_update(struct hclge_dev *hdev)
+{
+	/* DCB is enabled if we have more than 1 TC or pfc_en is
+	 * non-zero.
+	 */
+	if (hdev->tm_info.num_tc > 1 || hdev->tm_info.pfc_en)
+		hdev->flag |= HCLGE_FLAG_DCB_ENABLE;
+	else
+		hdev->flag &= ~HCLGE_FLAG_DCB_ENABLE;
+
+	hclge_pfc_info_init(hdev);
+}
+
 int hclge_tm_init_hw(struct hclge_dev *hdev, bool init)
 {
 	int ret;
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.h b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.h
index f60e540..5150daa 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.h
@@ -147,6 +147,7 @@ int hclge_pause_setup_hw(struct hclge_dev *hdev, bool init);
 int hclge_tm_schd_setup_hw(struct hclge_dev *hdev);
 void hclge_tm_prio_tc_info_update(struct hclge_dev *hdev, u8 *prio_tc);
 void hclge_tm_schd_info_update(struct hclge_dev *hdev, u8 num_tc);
+void hclge_tm_pfc_info_update(struct hclge_dev *hdev);
 int hclge_tm_dwrr_cfg(struct hclge_dev *hdev);
 int hclge_tm_init_hw(struct hclge_dev *hdev, bool init);
 int hclge_mac_pause_en_cfg(struct hclge_dev *hdev, bool tx, bool rx);
-- 
2.7.4