net: hns3: add querying fec ability from firmware

For some new devices, driver can queries fec ability from firmware to
decide which FEC mode can be supported.

If devices of old version which not support querying fec ability, driver
sets fixed ability according to current speed.
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

@@ -347,7 +347,8 @@ struct hclge_sfp_info_cmd {
 	u8 autoneg_ability; /* whether support autoneg */
 	__le32 speed_ability; /* speed ability for current media */
 	__le32 module_type;
-	u8 rsv[8];
+	u8 fec_ability;
+	u8 rsv[7];
 };
 
 #define HCLGE_MAC_CFG_FEC_AUTO_EN_B	0

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

@@ -1003,6 +1003,19 @@ static int hclge_check_port_speed(struct hnae3_handle *handle, u32 speed)
 	return -EINVAL;
 }
 
+static void hclge_update_fec_support(struct hclge_mac *mac)
+{
+	linkmode_clear_bit(ETHTOOL_LINK_MODE_FEC_BASER_BIT, mac->supported);
+	linkmode_clear_bit(ETHTOOL_LINK_MODE_FEC_RS_BIT, mac->supported);
+
+	if (mac->fec_ability & BIT(HNAE3_FEC_BASER))
+		linkmode_set_bit(ETHTOOL_LINK_MODE_FEC_BASER_BIT,
+				 mac->supported);
+	if (mac->fec_ability & BIT(HNAE3_FEC_RS))
+		linkmode_set_bit(ETHTOOL_LINK_MODE_FEC_RS_BIT,
+				 mac->supported);
+}
+
 static void hclge_convert_setting_sr(u16 speed_ability,
 				     unsigned long *link_mode)
 {
@@ -1101,34 +1114,33 @@ static void hclge_convert_setting_kr(u16 speed_ability,
 
 static void hclge_convert_setting_fec(struct hclge_mac *mac)
 {
-	linkmode_clear_bit(ETHTOOL_LINK_MODE_FEC_BASER_BIT, mac->supported);
-	linkmode_clear_bit(ETHTOOL_LINK_MODE_FEC_RS_BIT, mac->supported);
+	/* If firmware has reported fec_ability, don't need to convert by speed */
+	if (mac->fec_ability)
+		goto out;
 
 	switch (mac->speed) {
 	case HCLGE_MAC_SPEED_10G:
 	case HCLGE_MAC_SPEED_40G:
-		linkmode_set_bit(ETHTOOL_LINK_MODE_FEC_BASER_BIT,
-				 mac->supported);
 		mac->fec_ability =
 			BIT(HNAE3_FEC_BASER) | BIT(HNAE3_FEC_AUTO);
 		break;
 	case HCLGE_MAC_SPEED_25G:
 	case HCLGE_MAC_SPEED_50G:
-		linkmode_set_bit(ETHTOOL_LINK_MODE_FEC_RS_BIT,
-				 mac->supported);
 		mac->fec_ability =
 			BIT(HNAE3_FEC_BASER) | BIT(HNAE3_FEC_RS) |
 			BIT(HNAE3_FEC_AUTO);
 		break;
 	case HCLGE_MAC_SPEED_100G:
 	case HCLGE_MAC_SPEED_200G:
-		linkmode_set_bit(ETHTOOL_LINK_MODE_FEC_RS_BIT, mac->supported);
 		mac->fec_ability = BIT(HNAE3_FEC_RS) | BIT(HNAE3_FEC_AUTO);
 		break;
 	default:
 		mac->fec_ability = 0;
 		break;
 	}
+
+out:
+	hclge_update_fec_support(mac);
 }
 
 static void hclge_parse_fiber_link_mode(struct hclge_dev *hdev,
@@ -3037,7 +3049,6 @@ static void hclge_update_port_capability(struct hclge_dev *hdev,
 					 struct hclge_mac *mac)
 {
 	if (hnae3_dev_fec_supported(hdev))
-		/* update fec ability by speed */
 		hclge_convert_setting_fec(mac);
 
 	/* firmware can not identify back plane type, the media type
@@ -3123,6 +3134,7 @@ static int hclge_get_sfp_info(struct hclge_dev *hdev, struct hclge_mac *mac)
 			mac->fec_mode = 0;
 		else
 			mac->fec_mode = BIT(resp->active_fec);
+		mac->fec_ability = resp->fec_ability;
 	} else {
 		mac->speed_type = QUERY_SFP_SPEED;
 	}
@@ -11452,6 +11464,10 @@ static int hclge_init_ae_dev(struct hnae3_ae_dev *ae_dev)
 	if (ret)
 		goto err_mdiobus_unreg;
 
+	ret = hclge_update_port_info(hdev);
+	if (ret)
+		goto err_mdiobus_unreg;
+
 	INIT_KFIFO(hdev->mac_tnl_log);
 
 	hclge_dcb_ops_set(hdev);