net: hns3: add support for obtaining the maximum frame size

Since the newer hardware may supports different frame size,
so add support to obtain the capability from the firmware
instead of the fixed value.
Signed-off-by: Yufeng Mo <moyufeng@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/hisilicon/hns3/hnae3.h

@@ -284,6 +284,7 @@ struct hnae3_dev_specs {
 	u16 int_ql_max; /* max value of interrupt coalesce based on INT_QL */
 	u16 max_int_gl; /* max value of interrupt coalesce based on INT_GL */
 	u8 max_non_tso_bd_num; /* max BD number of one non-TSO packet */
+	u16 max_frm_size;
 };
 
 struct hnae3_client_ops {

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

@@ -389,6 +389,7 @@ static void hns3_dbg_dev_specs(struct hnae3_handle *h)
 		 kinfo->tc_info.num_tc);
 	dev_info(priv->dev, "MAX INT QL: %u\n", dev_specs->int_ql_max);
 	dev_info(priv->dev, "MAX INT GL: %u\n", dev_specs->max_int_gl);
+	dev_info(priv->dev, "MAX frame size: %u\n", dev_specs->max_frm_size);
 }
 
 static ssize_t hns3_dbg_cmd_read(struct file *filp, char __user *buffer,

drivers/net/ethernet/hisilicon/hns3/hns3_enet.c

@@ -4281,8 +4281,7 @@ static int hns3_client_init(struct hnae3_handle *handle)
 
 	hns3_dbg_init(handle);
 
-	/* MTU range: (ETH_MIN_MTU(kernel default) - 9702) */
-	netdev->max_mtu = HNS3_MAX_MTU;
+	netdev->max_mtu = HNS3_MAX_MTU(ae_dev->dev_specs.max_frm_size);
 
 	if (test_bit(HNAE3_DEV_SUPPORT_HW_TX_CSUM_B, ae_dev->caps))
 		set_bit(HNS3_NIC_STATE_HW_TX_CSUM_ENABLE, &priv->state);

drivers/net/ethernet/hisilicon/hns3/hns3_enet.h

@@ -56,9 +56,8 @@ enum hns3_nic_state {
 #define HNS3_RING_MIN_PENDING			72
 #define HNS3_RING_BD_MULTIPLE			8
 /* max frame size of mac */
-#define HNS3_MAC_MAX_FRAME			9728
-#define HNS3_MAX_MTU \
-	(HNS3_MAC_MAX_FRAME - (ETH_HLEN + ETH_FCS_LEN + 2 * VLAN_HLEN))
+#define HNS3_MAX_MTU(max_frm_size) \
+	((max_frm_size) - (ETH_HLEN + ETH_FCS_LEN + 2 * VLAN_HLEN))
 
 #define HNS3_BD_SIZE_512_TYPE			0
 #define HNS3_BD_SIZE_1024_TYPE			1

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

@@ -1131,7 +1131,8 @@ struct hclge_dev_specs_0_cmd {
 #define HCLGE_DEF_MAX_INT_GL		0x1FE0U
 
 struct hclge_dev_specs_1_cmd {
-	__le32 rsv0;
+	__le16 max_frm_size;
+	__le16 rsv0;
 	__le16 max_int_gl;
 	u8 rsv1[18];
 };

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

@@ -1371,6 +1371,7 @@ static void hclge_set_default_dev_specs(struct hclge_dev *hdev)
 	ae_dev->dev_specs.rss_key_size = HCLGE_RSS_KEY_SIZE;
 	ae_dev->dev_specs.max_tm_rate = HCLGE_ETHER_MAX_RATE;
 	ae_dev->dev_specs.max_int_gl = HCLGE_DEF_MAX_INT_GL;
+	ae_dev->dev_specs.max_frm_size = HCLGE_MAC_MAX_FRAME;
 }
 
 static void hclge_parse_dev_specs(struct hclge_dev *hdev,
@@ -1390,6 +1391,7 @@ static void hclge_parse_dev_specs(struct hclge_dev *hdev,
 	ae_dev->dev_specs.rss_key_size = le16_to_cpu(req0->rss_key_size);
 	ae_dev->dev_specs.max_tm_rate = le32_to_cpu(req0->max_tm_rate);
 	ae_dev->dev_specs.max_int_gl = le16_to_cpu(req1->max_int_gl);
+	ae_dev->dev_specs.max_frm_size = le16_to_cpu(req1->max_frm_size);
 }
 
 static void hclge_check_dev_specs(struct hclge_dev *hdev)
@@ -1406,6 +1408,8 @@ static void hclge_check_dev_specs(struct hclge_dev *hdev)
 		dev_specs->max_tm_rate = HCLGE_ETHER_MAX_RATE;
 	if (!dev_specs->max_int_gl)
 		dev_specs->max_int_gl = HCLGE_DEF_MAX_INT_GL;
+	if (!dev_specs->max_frm_size)
+		dev_specs->max_frm_size = HCLGE_MAC_MAX_FRAME;
 }
 
 static int hclge_query_dev_specs(struct hclge_dev *hdev)
@@ -9673,7 +9677,7 @@ int hclge_set_vport_mtu(struct hclge_vport *vport, int new_mtu)
 	/* HW supprt 2 layer vlan */
 	max_frm_size = new_mtu + ETH_HLEN + ETH_FCS_LEN + 2 * VLAN_HLEN;
 	if (max_frm_size < HCLGE_MAC_MIN_FRAME ||
-	    max_frm_size > HCLGE_MAC_MAX_FRAME)
+	    max_frm_size > hdev->ae_dev->dev_specs.max_frm_size)
 		return -EINVAL;
 
 	max_frm_size = max(max_frm_size, HCLGE_MAC_DEFAULT_FRAME);

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

@@ -296,7 +296,8 @@ struct hclgevf_dev_specs_0_cmd {
 #define HCLGEVF_DEF_MAX_INT_GL		0x1FE0U
 
 struct hclgevf_dev_specs_1_cmd {
-	__le32 rsv0;
+	__le16 max_frm_size;
+	__le16 rsv0;
 	__le16 max_int_gl;
 	u8 rsv1[18];
 };

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

@@ -3058,6 +3058,7 @@ static void hclgevf_set_default_dev_specs(struct hclgevf_dev *hdev)
 	ae_dev->dev_specs.rss_ind_tbl_size = HCLGEVF_RSS_IND_TBL_SIZE;
 	ae_dev->dev_specs.rss_key_size = HCLGEVF_RSS_KEY_SIZE;
 	ae_dev->dev_specs.max_int_gl = HCLGEVF_DEF_MAX_INT_GL;
+	ae_dev->dev_specs.max_frm_size = HCLGEVF_MAC_MAX_FRAME;
 }
 
 static void hclgevf_parse_dev_specs(struct hclgevf_dev *hdev,
@@ -3076,6 +3077,7 @@ static void hclgevf_parse_dev_specs(struct hclgevf_dev *hdev,
 	ae_dev->dev_specs.int_ql_max = le16_to_cpu(req0->int_ql_max);
 	ae_dev->dev_specs.rss_key_size = le16_to_cpu(req0->rss_key_size);
 	ae_dev->dev_specs.max_int_gl = le16_to_cpu(req1->max_int_gl);
+	ae_dev->dev_specs.max_frm_size = le16_to_cpu(req1->max_frm_size);
 }
 
 static void hclgevf_check_dev_specs(struct hclgevf_dev *hdev)
@@ -3090,6 +3092,8 @@ static void hclgevf_check_dev_specs(struct hclgevf_dev *hdev)
 		dev_specs->rss_key_size = HCLGEVF_RSS_KEY_SIZE;
 	if (!dev_specs->max_int_gl)
 		dev_specs->max_int_gl = HCLGEVF_DEF_MAX_INT_GL;
+	if (!dev_specs->max_frm_size)
+		dev_specs->max_frm_size = HCLGEVF_MAC_MAX_FRAME;
 }
 
 static int hclgevf_query_dev_specs(struct hclgevf_dev *hdev)

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

@@ -124,6 +124,8 @@
 #define HCLGEVF_RSS_INPUT_TUPLE_SCTP_NO_PORT	\
 	(HCLGEVF_D_IP_BIT | HCLGEVF_S_IP_BIT | HCLGEVF_V_TAG_BIT)
 
+#define HCLGEVF_MAC_MAX_FRAME		9728
+
 #define HCLGEVF_STATS_TIMER_INTERVAL	36U
 
 enum hclgevf_evt_cause {