net: hns3: add handler for NCSI error mailbox

driver inclusion
category: bugfix
bugzilla: NA
CVE: NA

When NCSI has HW error, the IMP will report this error to the driver
by sending a mailbox. After received this message, the driver should
assert a global reset to fix this kind of HW error.
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Reviewed-by: Nlipeng <lipeng321@huawei.com>
Reviewed-by: NYang Yingliang <yangyingliang@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>

drivers/net/ethernet/hisilicon/hns3/hclge_mbx.h

@@ -47,6 +47,7 @@ enum HCLGE_MBX_OPCODE {
 	HCLGE_MBX_GET_MEDIA_TYPE,       /* (VF -> PF) get media type */
 
 	HCLGE_MBX_GET_VF_FLR_STATUS = 200, /* (M7 -> PF) get vf flr status */
+	HCLGE_MBX_NCSI_ERROR = 202,	/* (M7 -> PF) receive a NCSI error */
 };
 
 /* below are per-VF mac-vlan subcodes */

drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mbx.c

@@ -582,6 +582,7 @@ static bool hclge_cmd_crq_empty(struct hclge_hw *hw)
 void hclge_mbx_handler(struct hclge_dev *hdev)
 {
 	struct hclge_cmq_ring *crq = &hdev->hw.cmq.crq;
+	struct hnae3_ae_dev *ae_dev = hdev->ae_dev;
 	struct hclge_mbx_vf_to_pf_cmd *req;
 	struct hclge_vport *vport;
 	struct hclge_desc *desc;
@@ -733,6 +734,11 @@ void hclge_mbx_handler(struct hclge_dev *hdev)
 					"PF fail(%d) to media type for VF\n",
 					ret);
 			break;
+		case HCLGE_MBX_NCSI_ERROR:
+			ae_dev->ops->set_default_reset_request(ae_dev, HNAE3_GLOBAL_RESET);
+			dev_warn(&hdev->pdev->dev, "requesting reset due to NCSI error\n");
+			ae_dev->ops->reset_event(hdev->pdev, NULL);
+			break;
 		default:
 			dev_err(&hdev->pdev->dev,
 				"un-supported mailbox message, code = %d\n",