net: hns3: add support for dumping MAC umv counter in debugfs

This patch adds support of dumping MAC umv counter in debugfs,
which will be helpful for debugging.

The display style is below:
$ cat umv_info
num_alloc_vport  : 2
max_umv_size     : 256
wanted_umv_size  : 256
priv_umv_size    : 85
share_umv_size   : 86
vport(0) used_umv_num : 1
vport(1) used_umv_num : 1
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

@@ -293,6 +293,7 @@ enum hnae3_dbg_cmd {
 	HNAE3_DBG_CMD_FD_COUNTER,
 	HNAE3_DBG_CMD_MAC_TNL_STATUS,
 	HNAE3_DBG_CMD_SERV_INFO,
+	HNAE3_DBG_CMD_UMV_INFO,
 	HNAE3_DBG_CMD_UNKNOWN,
 };
 

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

@@ -330,6 +330,13 @@ static struct hns3_dbg_cmd_info hns3_dbg_cmd[] = {
 		.buf_len = HNS3_DBG_READ_LEN,
 		.init = hns3_dbg_common_file_init,
 	},
+	{
+		.name = "umv_info",
+		.cmd = HNAE3_DBG_CMD_UMV_INFO,
+		.dentry = HNS3_DBG_DENTRY_COMMON,
+		.buf_len = HNS3_DBG_READ_LEN,
+		.init = hns3_dbg_common_file_init,
+	},
 };
 
 static struct hns3_dbg_cap_info hns3_dbg_cap[] = {

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

@@ -1927,6 +1927,36 @@ static void hclge_dbg_dump_mac_list(struct hclge_dev *hdev, char *buf, int len,
 	}
 }
 
+static int hclge_dbg_dump_umv_info(struct hclge_dev *hdev, char *buf, int len)
+{
+	u8 func_num = pci_num_vf(hdev->pdev) + 1;
+	struct hclge_vport *vport;
+	int pos = 0;
+	u8 i;
+
+	pos += scnprintf(buf, len, "num_alloc_vport   : %u\n",
+			  hdev->num_alloc_vport);
+	pos += scnprintf(buf + pos, len - pos, "max_umv_size     : %u\n",
+			 hdev->max_umv_size);
+	pos += scnprintf(buf + pos, len - pos, "wanted_umv_size  : %u\n",
+			 hdev->wanted_umv_size);
+	pos += scnprintf(buf + pos, len - pos, "priv_umv_size    : %u\n",
+			 hdev->priv_umv_size);
+
+	mutex_lock(&hdev->vport_lock);
+	pos += scnprintf(buf + pos, len - pos, "share_umv_size   : %u\n",
+			 hdev->share_umv_size);
+	for (i = 0; i < func_num; i++) {
+		vport = &hdev->vport[i];
+		pos += scnprintf(buf + pos, len - pos,
+				 "vport(%u) used_umv_num : %u\n",
+				 i, vport->used_umv_num);
+	}
+	mutex_unlock(&hdev->vport_lock);
+
+	return 0;
+}
+
 static int hclge_get_vlan_rx_offload_cfg(struct hclge_dev *hdev, u8 vf_id,
 					 struct hclge_dbg_vlan_cfg *vlan_cfg)
 {
@@ -2412,6 +2442,10 @@ static const struct hclge_dbg_func hclge_dbg_cmd_func[] = {
 		.cmd = HNAE3_DBG_CMD_FD_COUNTER,
 		.dbg_dump = hclge_dbg_dump_fd_counter,
 	},
+	{
+		.cmd = HNAE3_DBG_CMD_UMV_INFO,
+		.dbg_dump = hclge_dbg_dump_umv_info,
+	},
 };
 
 int hclge_dbg_read_cmd(struct hnae3_handle *handle, enum hnae3_dbg_cmd cmd,