From: Guangbin Huang <huangguangbin2@huawei.com>
Date: Sun, 24 Oct 2021 17:41:10 +0800
Subject: net: hns3: device specifications add number of mac statistics
Patch-mainline: v5.16-rc1
Git-commit: 4e4c03f6ab636e9c39558845da5bfbcd60baf33d
References: bsc#1190336

Currently, driver queries number of mac statistics before querying mac
statistics. As the number of mac statistics is a fixed value in firmware,
it is redundant to query this number everytime before querying mac
statistics, it can just be queried once in initialization process and
saved in device specifications.

Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/hisilicon/hns3/hnae3.h             |    1 
 drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c      |    2 
 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c |   34 ++++++++++------
 3 files changed, 26 insertions(+), 11 deletions(-)

--- a/drivers/net/ethernet/hisilicon/hns3/hnae3.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hnae3.h
@@ -349,6 +349,7 @@ struct hnae3_dev_specs {
 	u16 max_qset_num;
 	u16 umv_size;
 	u16 mc_mac_size;
+	u32 mac_stats_num;
 };
 
 struct hnae3_client_ops {
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c
@@ -1050,6 +1050,8 @@ hns3_dbg_dev_specs(struct hnae3_handle *
 			  dev_specs->umv_size);
 	*pos += scnprintf(buf + *pos, len - *pos, "mc mac size: %u\n",
 			  dev_specs->mc_mac_size);
+	*pos += scnprintf(buf + *pos, len - *pos, "MAC statistics number: %u\n",
+			  dev_specs->mac_stats_num);
 }
 
 static int hns3_dbg_dev_info(struct hnae3_handle *h, char *buf, int len)
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -480,10 +480,11 @@ static int hclge_mac_update_stats_defect
 	return 0;
 }
 
-static int hclge_mac_update_stats_complete(struct hclge_dev *hdev, u32 reg_num)
+static int hclge_mac_update_stats_complete(struct hclge_dev *hdev)
 {
 #define HCLGE_REG_NUM_PER_DESC		4
 
+	u32 reg_num = hdev->ae_dev->dev_specs.mac_stats_num;
 	u64 *data = (u64 *)(&hdev->mac_stats);
 	struct hclge_desc *desc;
 	__le64 *desc_data;
@@ -552,17 +553,11 @@ static int hclge_mac_query_reg_num(struc
 
 static int hclge_mac_update_stats(struct hclge_dev *hdev)
 {
-	u32 reg_num;
-	int ret;
-
-	ret = hclge_mac_query_reg_num(hdev, &reg_num);
 	/* The firmware supports the new statistics acquisition method */
-	if (!ret)
-		ret = hclge_mac_update_stats_complete(hdev, reg_num);
-	else if (ret == -EOPNOTSUPP)
-		ret = hclge_mac_update_stats_defective(hdev);
-
-	return ret;
+	if (hdev->ae_dev->dev_specs.mac_stats_num)
+		return hclge_mac_update_stats_complete(hdev);
+	else
+		return hclge_mac_update_stats_defective(hdev);
 }
 
 static int hclge_tqps_update_stats(struct hnae3_handle *handle)
@@ -1465,12 +1460,29 @@ static void hclge_check_dev_specs(struct
 		dev_specs->umv_size = HCLGE_DEFAULT_UMV_SPACE_PER_PF;
 }
 
+static int hclge_query_mac_stats_num(struct hclge_dev *hdev)
+{
+	u32 reg_num = 0;
+	int ret;
+
+	ret = hclge_mac_query_reg_num(hdev, &reg_num);
+	if (ret && ret != -EOPNOTSUPP)
+		return ret;
+
+	hdev->ae_dev->dev_specs.mac_stats_num = reg_num;
+	return 0;
+}
+
 static int hclge_query_dev_specs(struct hclge_dev *hdev)
 {
 	struct hclge_desc desc[HCLGE_QUERY_DEV_SPECS_BD_NUM];
 	int ret;
 	int i;
 
+	ret = hclge_query_mac_stats_num(hdev);
+	if (ret)
+		return ret;
+
 	/* set default specifications as devices lower than version V3 do not
 	 * support querying specifications from firmware.
 	 */