Merge branch 'hns3-next'

Huazhong Tan says:

====================
net: hns3: updates for -next

This series adds support for pushing link status to VFs for
the HNS3 ethernet driver.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

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

@@ -172,4 +172,7 @@ struct hclgevf_mbx_arq_ring {
 		(arq.tail = (arq.tail + 1) % HCLGE_MBX_MAX_ARQ_MSG_NUM)
 #define hclge_mbx_head_ptr_move_arq(arq) \
 		(arq.head = (arq.head + 1) % HCLGE_MBX_MAX_ARQ_MSG_NUM)
+
+/* PF immediately push link status to VFs when link status changed */
+#define HCLGE_MBX_PUSH_LINK_STATUS_EN			BIT(0)
 #endif

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

@@ -2880,6 +2880,28 @@ static int hclge_get_mac_phy_link(struct hclge_dev *hdev, int *link_status)
 	return hclge_get_mac_link_status(hdev, link_status);
 }
 
+static void hclge_push_link_status(struct hclge_dev *hdev)
+{
+	struct hclge_vport *vport;
+	int ret;
+	u16 i;
+
+	for (i = 0; i < pci_num_vf(hdev->pdev); i++) {
+		vport = &hdev->vport[i + HCLGE_VF_VPORT_START_NUM];
+
+		if (!test_bit(HCLGE_VPORT_STATE_ALIVE, &vport->state) ||
+		    vport->vf_info.link_state != IFLA_VF_LINK_STATE_AUTO)
+			continue;
+
+		ret = hclge_push_vf_link_status(vport);
+		if (ret) {
+			dev_err(&hdev->pdev->dev,
+				"failed to push link status to vf%u, ret = %d\n",
+				i, ret);
+		}
+	}
+}
+
 static void hclge_update_link_status(struct hclge_dev *hdev)
 {
 	struct hnae3_handle *rhandle = &hdev->vport[0].roce;
@@ -2908,6 +2930,7 @@ static void hclge_update_link_status(struct hclge_dev *hdev)
 			rclient->ops->link_status_change(rhandle, state);
 
 		hdev->hw.mac.link = state;
+		hclge_push_link_status(hdev);
 	}
 
 	clear_bit(HCLGE_STATE_LINK_UPDATING, &hdev->state);
@@ -3246,14 +3269,24 @@ static int hclge_set_vf_link_state(struct hnae3_handle *handle, int vf,
 {
 	struct hclge_vport *vport = hclge_get_vport(handle);
 	struct hclge_dev *hdev = vport->back;
+	int link_state_old;
+	int ret;
 
 	vport = hclge_get_vf_vport(hdev, vf);
 	if (!vport)
 		return -EINVAL;
 
+	link_state_old = vport->vf_info.link_state;
 	vport->vf_info.link_state = link_state;
 
-	return 0;
+	ret = hclge_push_vf_link_status(vport);
+	if (ret) {
+		vport->vf_info.link_state = link_state_old;
+		dev_err(&hdev->pdev->dev,
+			"failed to push vf%d link status, ret = %d\n", vf, ret);
+	}
+
+	return ret;
 }
 
 static u32 hclge_check_event_cause(struct hclge_dev *hdev, u32 *clearval)

drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h

@@ -1089,4 +1089,5 @@ void hclge_report_hw_error(struct hclge_dev *hdev,
 			   enum hnae3_hw_error_type type);
 void hclge_inform_vf_promisc_info(struct hclge_vport *vport);
 void hclge_dbg_dump_rst_info(struct hclge_dev *hdev);
+int hclge_push_vf_link_status(struct hclge_vport *vport);
 #endif

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

@@ -490,16 +490,14 @@ static void hclge_get_vf_media_type(struct hclge_vport *vport,
 	resp_msg->len = HCLGE_VF_MEDIA_TYPE_LENGTH;
 }
 
-static int hclge_get_link_info(struct hclge_vport *vport,
-			       struct hclge_mbx_vf_to_pf_cmd *mbx_req)
+int hclge_push_vf_link_status(struct hclge_vport *vport)
 {
 #define HCLGE_VF_LINK_STATE_UP		1U
 #define HCLGE_VF_LINK_STATE_DOWN	0U
 
 	struct hclge_dev *hdev = vport->back;
 	u16 link_status;
-	u8 msg_data[8];
-	u8 dest_vfid;
+	u8 msg_data[9];
 	u16 duplex;
 
 	/* mac.link can only be 0 or 1 */
@@ -520,11 +518,11 @@ static int hclge_get_link_info(struct hclge_vport *vport,
 	memcpy(&msg_data[0], &link_status, sizeof(u16));
 	memcpy(&msg_data[2], &hdev->hw.mac.speed, sizeof(u32));
 	memcpy(&msg_data[6], &duplex, sizeof(u16));
-	dest_vfid = mbx_req->mbx_src_vfid;
+	msg_data[8] = HCLGE_MBX_PUSH_LINK_STATUS_EN;
 
 	/* send this requested info to VF */
 	return hclge_send_mbx_msg(vport, msg_data, sizeof(msg_data),
-				  HCLGE_MBX_LINK_STAT_CHANGE, dest_vfid);
+				  HCLGE_MBX_LINK_STAT_CHANGE, vport->vport_id);
 }
 
 static void hclge_get_link_mode(struct hclge_vport *vport,
@@ -794,7 +792,7 @@ void hclge_mbx_handler(struct hclge_dev *hdev)
 			hclge_get_vf_tcinfo(vport, &resp_msg);
 			break;
 		case HCLGE_MBX_GET_LINK_STATUS:
-			ret = hclge_get_link_info(vport, req);
+			ret = hclge_push_vf_link_status(vport);
 			if (ret)
 				dev_err(&hdev->pdev->dev,
 					"failed to inform link stat to VF, ret = %d\n",

drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c

@@ -2340,10 +2340,11 @@ static void hclgevf_periodic_service_task(struct hclgevf_dev *hdev)
 	if (!(hdev->serv_processed_cnt % HCLGEVF_STATS_TIMER_INTERVAL))
 		hclgevf_tqps_update_stats(handle);
 
-	/* request the link status from the PF. PF would be able to tell VF
-	 * about such updates in future so we might remove this later
+	/* VF does not need to request link status when this bit is set, because
+	 * PF will push its link status to VFs when link status changed.
 	 */
-	hclgevf_request_link_info(hdev);
+	if (!test_bit(HCLGEVF_STATE_PF_PUSH_LINK_STATUS, &hdev->state))
+		hclgevf_request_link_info(hdev);
 
 	hclgevf_update_link_mode(hdev);
 
@@ -2657,6 +2658,7 @@ static int hclgevf_ae_start(struct hnae3_handle *handle)
 	struct hclgevf_dev *hdev = hclgevf_ae_get_hdev(handle);
 
 	clear_bit(HCLGEVF_STATE_DOWN, &hdev->state);
+	clear_bit(HCLGEVF_STATE_PF_PUSH_LINK_STATUS, &hdev->state);
 
 	hclgevf_reset_tqp_stats(handle);
 

drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.h

@@ -152,6 +152,7 @@ enum hclgevf_states {
 	HCLGEVF_STATE_LINK_UPDATING,
 	HCLGEVF_STATE_PROMISC_CHANGED,
 	HCLGEVF_STATE_RST_FAIL,
+	HCLGEVF_STATE_PF_PUSH_LINK_STATUS,
 };
 
 struct hclgevf_mac {

drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_mbx.c

@@ -276,6 +276,7 @@ void hclgevf_mbx_async_handler(struct hclgevf_dev *hdev)
 	u8 duplex;
 	u32 speed;
 	u32 tail;
+	u8 flag;
 	u8 idx;
 
 	/* we can safely clear it now as we are at start of the async message
@@ -300,11 +301,16 @@ void hclgevf_mbx_async_handler(struct hclgevf_dev *hdev)
 			link_status = msg_q[1];
 			memcpy(&speed, &msg_q[2], sizeof(speed));
 			duplex = (u8)msg_q[4];
+			flag = (u8)msg_q[5];
 
 			/* update upper layer with new link link status */
 			hclgevf_update_link_status(hdev, link_status);
 			hclgevf_update_speed_duplex(hdev, speed, duplex);
 
+			if (flag & HCLGE_MBX_PUSH_LINK_STATUS_EN)
+				set_bit(HCLGEVF_STATE_PF_PUSH_LINK_STATUS,
+					&hdev->state);
+
 			break;
 		case HCLGE_MBX_LINK_STAT_MODE:
 			idx = (u8)msg_q[1];