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Subject[PATCH net-next 06/12] net: hns3: After setting the loopback, add the status of getting MAC
Date
From: liuzhongzhu <liuzhongzhu@huawei.com>

After setting the serdes loopback, you need to determine
the status of the MAC negotiation. If a status exception
is obtained after 200ms, a timeout error is returned.

Signed-off-by: liuzhongzhu <liuzhongzhu@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
---
.../hisilicon/hns3/hns3pf/hclge_main.c | 23 ++++++++++++++++++-
1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
index 558389a18353..ae8336c18264 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -5237,8 +5237,15 @@ static int hclge_set_serdes_loopback(struct hclge_dev *hdev, bool en,
{
#define HCLGE_SERDES_RETRY_MS 10
#define HCLGE_SERDES_RETRY_NUM 100
+
+#define HCLGE_MAC_LINK_STATUS_MS 20
+#define HCLGE_MAC_LINK_STATUS_NUM 10
+#define HCLGE_MAC_LINK_STATUS_DOWN 0
+#define HCLGE_MAC_LINK_STATUS_UP 1
+
struct hclge_serdes_lb_cmd *req;
struct hclge_desc desc;
+ int mac_link_ret = 0;
int ret, i = 0;
u8 loop_mode_b;

@@ -5261,8 +5268,10 @@ static int hclge_set_serdes_loopback(struct hclge_dev *hdev, bool en,
if (en) {
req->enable = loop_mode_b;
req->mask = loop_mode_b;
+ mac_link_ret = HCLGE_MAC_LINK_STATUS_UP;
} else {
req->mask = loop_mode_b;
+ mac_link_ret = HCLGE_MAC_LINK_STATUS_DOWN;
}

ret = hclge_cmd_send(&hdev->hw, &desc, 1);
@@ -5294,7 +5303,19 @@ static int hclge_set_serdes_loopback(struct hclge_dev *hdev, bool en,
}

hclge_cfg_mac_mode(hdev, en);
- return 0;
+
+ i = 0;
+ do {
+ /* serdes Internal loopback, independent of the network cable.*/
+ msleep(HCLGE_MAC_LINK_STATUS_MS);
+ ret = hclge_get_mac_link_status(hdev);
+ if (ret == mac_link_ret)
+ return 0;
+ } while (++i < HCLGE_MAC_LINK_STATUS_NUM);
+
+ dev_err(&hdev->pdev->dev, "config mac mode timeout\n");
+
+ return -EBUSY;
}

static int hclge_tqp_enable(struct hclge_dev *hdev, int tqp_id,
--
2.20.1

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