net: hns3: add support for dumping MAC reg in debugfs

This patch adds support for dumping MAC reg in debugfs,
which will be helpful for debugging.
Signed-off-by: Yufeng Mo <moyufeng@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c

@@ -270,7 +270,7 @@ static void hns3_dbg_help(struct hnae3_handle *h)
 		" [igu egu <port_id>] [rpu <tc_queue_num>]",
 		HNS3_DBG_BUF_LEN - strlen(printf_buf) - 1);
 	strncat(printf_buf + strlen(printf_buf),
-		" [rtc] [ppp] [rcb] [tqp <queue_num>]]\n",
+		" [rtc] [ppp] [rcb] [tqp <queue_num>] [mac]]\n",
 		HNS3_DBG_BUF_LEN - strlen(printf_buf) - 1);
 	dev_info(&h->pdev->dev, "%s", printf_buf);
 

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

@@ -173,6 +173,114 @@ static void hclge_dbg_dump_reg_common(struct hclge_dev *hdev,
 	kfree(desc_src);
 }
 
+static void hclge_dbg_dump_mac_enable_status(struct hclge_dev *hdev)
+{
+	struct hclge_config_mac_mode_cmd *req;
+	struct hclge_desc desc;
+	u32 loop_en;
+	int ret;
+
+	hclge_cmd_setup_basic_desc(&desc, HCLGE_OPC_CONFIG_MAC_MODE, true);
+
+	ret = hclge_cmd_send(&hdev->hw, &desc, 1);
+	if (ret) {
+		dev_err(&hdev->pdev->dev,
+			"failed to dump mac enable status, ret = %d\n", ret);
+		return;
+	}
+
+	req = (struct hclge_config_mac_mode_cmd *)desc.data;
+	loop_en = le32_to_cpu(req->txrx_pad_fcs_loop_en);
+
+	dev_info(&hdev->pdev->dev, "config_mac_trans_en: %#x\n",
+		 hnae3_get_bit(loop_en, HCLGE_MAC_TX_EN_B));
+	dev_info(&hdev->pdev->dev, "config_mac_rcv_en: %#x\n",
+		 hnae3_get_bit(loop_en, HCLGE_MAC_RX_EN_B));
+	dev_info(&hdev->pdev->dev, "config_pad_trans_en: %#x\n",
+		 hnae3_get_bit(loop_en, HCLGE_MAC_PAD_TX_B));
+	dev_info(&hdev->pdev->dev, "config_pad_rcv_en: %#x\n",
+		 hnae3_get_bit(loop_en, HCLGE_MAC_PAD_RX_B));
+	dev_info(&hdev->pdev->dev, "config_1588_trans_en: %#x\n",
+		 hnae3_get_bit(loop_en, HCLGE_MAC_1588_TX_B));
+	dev_info(&hdev->pdev->dev, "config_1588_rcv_en: %#x\n",
+		 hnae3_get_bit(loop_en, HCLGE_MAC_1588_RX_B));
+	dev_info(&hdev->pdev->dev, "config_mac_app_loop_en: %#x\n",
+		 hnae3_get_bit(loop_en, HCLGE_MAC_APP_LP_B));
+	dev_info(&hdev->pdev->dev, "config_mac_line_loop_en: %#x\n",
+		 hnae3_get_bit(loop_en, HCLGE_MAC_LINE_LP_B));
+	dev_info(&hdev->pdev->dev, "config_mac_fcs_tx_en: %#x\n",
+		 hnae3_get_bit(loop_en, HCLGE_MAC_FCS_TX_B));
+	dev_info(&hdev->pdev->dev, "config_mac_rx_oversize_truncate_en: %#x\n",
+		 hnae3_get_bit(loop_en, HCLGE_MAC_RX_OVERSIZE_TRUNCATE_B));
+	dev_info(&hdev->pdev->dev, "config_mac_rx_fcs_strip_en: %#x\n",
+		 hnae3_get_bit(loop_en, HCLGE_MAC_RX_FCS_STRIP_B));
+	dev_info(&hdev->pdev->dev, "config_mac_rx_fcs_en: %#x\n",
+		 hnae3_get_bit(loop_en, HCLGE_MAC_RX_FCS_B));
+	dev_info(&hdev->pdev->dev, "config_mac_tx_under_min_err_en: %#x\n",
+		 hnae3_get_bit(loop_en, HCLGE_MAC_TX_UNDER_MIN_ERR_B));
+	dev_info(&hdev->pdev->dev, "config_mac_tx_oversize_truncate_en: %#x\n",
+		 hnae3_get_bit(loop_en, HCLGE_MAC_TX_OVERSIZE_TRUNCATE_B));
+}
+
+static void hclge_dbg_dump_mac_frame_size(struct hclge_dev *hdev)
+{
+	struct hclge_config_max_frm_size_cmd *req;
+	struct hclge_desc desc;
+	int ret;
+
+	hclge_cmd_setup_basic_desc(&desc, HCLGE_OPC_CONFIG_MAX_FRM_SIZE, true);
+
+	ret = hclge_cmd_send(&hdev->hw, &desc, 1);
+	if (ret) {
+		dev_err(&hdev->pdev->dev,
+			"failed to dump mac frame size, ret = %d\n", ret);
+		return;
+	}
+
+	req = (struct hclge_config_max_frm_size_cmd *)desc.data;
+
+	dev_info(&hdev->pdev->dev, "max_frame_size: %u\n",
+		 le16_to_cpu(req->max_frm_size));
+	dev_info(&hdev->pdev->dev, "min_frame_size: %u\n", req->min_frm_size);
+}
+
+static void hclge_dbg_dump_mac_speed_duplex(struct hclge_dev *hdev)
+{
+#define HCLGE_MAC_SPEED_SHIFT	0
+#define HCLGE_MAC_SPEED_MASK	GENMASK(5, 0)
+#define HCLGE_MAC_DUPLEX_SHIFT	7
+
+	struct hclge_config_mac_speed_dup_cmd *req;
+	struct hclge_desc desc;
+	int ret;
+
+	hclge_cmd_setup_basic_desc(&desc, HCLGE_OPC_CONFIG_SPEED_DUP, true);
+
+	ret = hclge_cmd_send(&hdev->hw, &desc, 1);
+	if (ret) {
+		dev_err(&hdev->pdev->dev,
+			"failed to dump mac speed duplex, ret = %d\n", ret);
+		return;
+	}
+
+	req = (struct hclge_config_mac_speed_dup_cmd *)desc.data;
+
+	dev_info(&hdev->pdev->dev, "speed: %#lx\n",
+		 hnae3_get_field(req->speed_dup, HCLGE_MAC_SPEED_MASK,
+				 HCLGE_MAC_SPEED_SHIFT));
+	dev_info(&hdev->pdev->dev, "duplex: %#x\n",
+		 hnae3_get_bit(req->speed_dup, HCLGE_MAC_DUPLEX_SHIFT));
+}
+
+static void hclge_dbg_dump_mac(struct hclge_dev *hdev)
+{
+	hclge_dbg_dump_mac_enable_status(hdev);
+
+	hclge_dbg_dump_mac_frame_size(hdev);
+
+	hclge_dbg_dump_mac_speed_duplex(hdev);
+}
+
 static void hclge_dbg_dump_dcb(struct hclge_dev *hdev, const char *cmd_buf)
 {
 	struct device *dev = &hdev->pdev->dev;
@@ -304,6 +412,11 @@ static void hclge_dbg_dump_reg_cmd(struct hclge_dev *hdev, const char *cmd_buf)
 		}
 	}
 
+	if (strncmp(cmd_buf, "mac", strlen("mac")) == 0) {
+		hclge_dbg_dump_mac(hdev);
+		has_dump = true;
+	}
+
 	if (strncmp(cmd_buf, "dcb", 3) == 0) {
 		hclge_dbg_dump_dcb(hdev, &cmd_buf[sizeof("dcb")]);
 		has_dump = true;