net: hns3: add debug information for flow table when failed

Adds some debug information for failures of processing flow table,
removes the redundant printing when hclge_fd_check_spec() returns
error, and modifies the printing level for FD not enable error.
Signed-off-by: Guojia Liao <liaoguojia@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

@@ -5381,22 +5381,32 @@ static int hclge_fd_check_ext_tuple(struct hclge_dev *hdev,
 				    u32 *unused_tuple)
 {
 	if (fs->flow_type & FLOW_EXT) {
-		if (fs->h_ext.vlan_etype)
+		if (fs->h_ext.vlan_etype) {
+			dev_err(&hdev->pdev->dev, "vlan-etype is not supported!\n");
 			return -EOPNOTSUPP;
+		}
+
 		if (!fs->h_ext.vlan_tci)
 			*unused_tuple |= BIT(INNER_VLAN_TAG_FST);
 
 		if (fs->m_ext.vlan_tci &&
-		    be16_to_cpu(fs->h_ext.vlan_tci) >= VLAN_N_VID)
+		    be16_to_cpu(fs->h_ext.vlan_tci) >= VLAN_N_VID) {
+			dev_err(&hdev->pdev->dev,
+				"failed to config vlan_tci, invalid vlan_tci: %u, max is %u.\n",
+				ntohs(fs->h_ext.vlan_tci), VLAN_N_VID - 1);
 			return -EINVAL;
+		}
 	} else {
 		*unused_tuple |= BIT(INNER_VLAN_TAG_FST);
 	}
 
 	if (fs->flow_type & FLOW_MAC_EXT) {
 		if (hdev->fd_cfg.fd_mode !=
-		    HCLGE_FD_MODE_DEPTH_2K_WIDTH_400B_STAGE_1)
+		    HCLGE_FD_MODE_DEPTH_2K_WIDTH_400B_STAGE_1) {
+			dev_err(&hdev->pdev->dev,
+				"FLOW_MAC_EXT is not supported in current fd mode!\n");
 			return -EOPNOTSUPP;
+		}
 
 		if (is_zero_ether_addr(fs->h_ext.h_dest))
 			*unused_tuple |= BIT(INNER_DST_MAC);
@@ -5414,8 +5424,13 @@ static int hclge_fd_check_spec(struct hclge_dev *hdev,
 	u32 flow_type;
 	int ret;
 
-	if (fs->location >= hdev->fd_cfg.rule_num[HCLGE_FD_STAGE_1])
+	if (fs->location >= hdev->fd_cfg.rule_num[HCLGE_FD_STAGE_1]) {
+		dev_err(&hdev->pdev->dev,
+			"failed to config fd rules, invalid rule location: %u, max is %u\n.",
+			fs->location,
+			hdev->fd_cfg.rule_num[HCLGE_FD_STAGE_1] - 1);
 		return -EINVAL;
+	}
 
 	if ((fs->flow_type & FLOW_EXT) &&
 	    (fs->h_ext.data[0] != 0 || fs->h_ext.data[1] != 0)) {
@@ -5457,11 +5472,18 @@ static int hclge_fd_check_spec(struct hclge_dev *hdev,
 						 unused_tuple);
 		break;
 	default:
+		dev_err(&hdev->pdev->dev,
+			"unsupported protocol type, protocol type = %#x\n",
+			flow_type);
 		return -EOPNOTSUPP;
 	}
 
-	if (ret)
+	if (ret) {
+		dev_err(&hdev->pdev->dev,
+			"failed to check flow union tuple, ret = %d\n",
+			ret);
 		return ret;
+	}
 
 	return hclge_fd_check_ext_tuple(hdev, fs, unused_tuple);
 }
@@ -5729,22 +5751,23 @@ static int hclge_add_fd_entry(struct hnae3_handle *handle,
 	u8 action;
 	int ret;
 
-	if (!hnae3_dev_fd_supported(hdev))
+	if (!hnae3_dev_fd_supported(hdev)) {
+		dev_err(&hdev->pdev->dev,
+			"flow table director is not supported\n");
 		return -EOPNOTSUPP;
+	}
 
 	if (!hdev->fd_en) {
-		dev_warn(&hdev->pdev->dev,
-			 "Please enable flow director first\n");
+		dev_err(&hdev->pdev->dev,
+			"please enable flow director first\n");
 		return -EOPNOTSUPP;
 	}
 
 	fs = (struct ethtool_rx_flow_spec *)&cmd->fs;
 
 	ret = hclge_fd_check_spec(hdev, fs, &unused);
-	if (ret) {
-		dev_err(&hdev->pdev->dev, "Check fd spec failed\n");
+	if (ret)
 		return ret;
-	}
 
 	if (fs->ring_cookie == RX_CLS_FLOW_DISC) {
 		action = HCLGE_FD_ACTION_DROP_PACKET;