From: Salil Mehta <salil.mehta@huawei.com>
Date: Thu, 22 Mar 2018 14:28:55 +0000
Subject: net: hns3: Add support to request VF Reset to PF
Patch-mainline: v4.17-rc1
Git-commit: a8dedb65926005e99ab23716b1c77586de83c4f4
References: bsc#1104353 FATE#326415

VF driver depends upon PF to eventually reset the hardware. This
request is made using the mailbox command. This patch adds the
required function to acheive above.

Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c |   19 ++++++++++++++
 1 file changed, 19 insertions(+)

--- a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
@@ -832,6 +832,20 @@ static void hclgevf_reset_tqp(struct hna
 			     2, true, NULL, 0);
 }
 
+static int hclgevf_do_reset(struct hclgevf_dev *hdev)
+{
+	int status;
+	u8 respmsg;
+
+	status = hclgevf_send_mbx_msg(hdev, HCLGE_MBX_RESET, 0, NULL,
+				      0, false, &respmsg, sizeof(u8));
+	if (status)
+		dev_err(&hdev->pdev->dev,
+			"VF reset request to PF failed(=%d)\n", status);
+
+	return status;
+}
+
 static void hclgevf_reset_event(struct hnae3_handle *handle)
 {
 	struct hclgevf_dev *hdev = hclgevf_ae_get_hdev(handle);
@@ -910,6 +924,7 @@ static void hclgevf_reset_service_task(s
 {
 	struct hclgevf_dev *hdev =
 		container_of(work, struct hclgevf_dev, rst_service_task);
+	int ret;
 
 	if (test_and_set_bit(HCLGEVF_STATE_RST_HANDLING, &hdev->state))
 		return;
@@ -965,6 +980,10 @@ static void hclgevf_reset_service_task(s
 			hdev->reset_attempts++;
 
 			/* request PF for resetting this VF via mailbox */
+			ret = hclgevf_do_reset(hdev);
+			if (ret)
+				dev_warn(&hdev->pdev->dev,
+					 "VF rst fail, stack will call\n");
 		}
 	}