net: hns3: use seq_file for files in tm/ in debugfs

Use seq_file for files in debugfs. This is the first
modification for reading in hclge_debugfs.c.

This patch use seq_file for the following nodes:
tm_nodes/tm_priority/tm_qset/tm_map/tm_pg/tm_port/tc_sch_info/
qos_pause_cfg/qos_pri_map/qos_dscp_map/qos_buf_cfg

Signed-off-by: Jian Shen <[email protected]>
Signed-off-by: Jijie Shao <[email protected]>
Reviewed-by: Andrew Lunn <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

Author: IronShen

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

@@ -601,6 +601,8 @@ typedef int (*read_func)(struct seq_file *s, void *data);
  *   Get wake on lan info
  * set_wol
  *   Config wake on lan
+ * dbg_get_read_func
+ *   Return the read func for debugfs seq file
  */
 struct hnae3_ae_ops {
 	int (*init_ae_dev)(struct hnae3_ae_dev *ae_dev);
@@ -803,6 +805,9 @@ struct hnae3_ae_ops {
 			struct ethtool_wolinfo *wol);
 	int (*set_wol)(struct hnae3_handle *handle,
 		       struct ethtool_wolinfo *wol);
+	int (*dbg_get_read_func)(struct hnae3_handle *handle,
+				 enum hnae3_dbg_cmd cmd,
+				 read_func *func);
 };
 
 struct hnae3_dcb_ops {

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

@@ -43,84 +43,85 @@ static struct hns3_dbg_dentry_info hns3_dbg_dentry[] = {
 static int hns3_dbg_bd_file_init(struct hnae3_handle *handle, u32 cmd);
 static int hns3_dbg_common_file_init(struct hnae3_handle *handle, u32 cmd);
 static int hns3_dbg_common_init_t1(struct hnae3_handle *handle, u32 cmd);
+static int hns3_dbg_common_init_t2(struct hnae3_handle *handle, u32 cmd);
 
 static struct hns3_dbg_cmd_info hns3_dbg_cmd[] = {
 	{
 		.name = "tm_nodes",
 		.cmd = HNAE3_DBG_CMD_TM_NODES,
 		.dentry = HNS3_DBG_DENTRY_TM,
 		.buf_len = HNS3_DBG_READ_LEN,
-		.init = hns3_dbg_common_file_init,
+		.init = hns3_dbg_common_init_t2,
 	},
 	{
 		.name = "tm_priority",
 		.cmd = HNAE3_DBG_CMD_TM_PRI,
 		.dentry = HNS3_DBG_DENTRY_TM,
 		.buf_len = HNS3_DBG_READ_LEN,
-		.init = hns3_dbg_common_file_init,
+		.init = hns3_dbg_common_init_t2,
 	},
 	{
 		.name = "tm_qset",
 		.cmd = HNAE3_DBG_CMD_TM_QSET,
 		.dentry = HNS3_DBG_DENTRY_TM,
 		.buf_len = HNS3_DBG_READ_LEN_1MB,
-		.init = hns3_dbg_common_file_init,
+		.init = hns3_dbg_common_init_t2,
 	},
 	{
 		.name = "tm_map",
 		.cmd = HNAE3_DBG_CMD_TM_MAP,
 		.dentry = HNS3_DBG_DENTRY_TM,
 		.buf_len = HNS3_DBG_READ_LEN_1MB,
-		.init = hns3_dbg_common_file_init,
+		.init = hns3_dbg_common_init_t2,
 	},
 	{
 		.name = "tm_pg",
 		.cmd = HNAE3_DBG_CMD_TM_PG,
 		.dentry = HNS3_DBG_DENTRY_TM,
 		.buf_len = HNS3_DBG_READ_LEN,
-		.init = hns3_dbg_common_file_init,
+		.init = hns3_dbg_common_init_t2,
 	},
 	{
 		.name = "tm_port",
 		.cmd = HNAE3_DBG_CMD_TM_PORT,
 		.dentry = HNS3_DBG_DENTRY_TM,
 		.buf_len = HNS3_DBG_READ_LEN,
-		.init = hns3_dbg_common_file_init,
+		.init = hns3_dbg_common_init_t2,
 	},
 	{
 		.name = "tc_sch_info",
 		.cmd = HNAE3_DBG_CMD_TC_SCH_INFO,
 		.dentry = HNS3_DBG_DENTRY_TM,
 		.buf_len = HNS3_DBG_READ_LEN,
-		.init = hns3_dbg_common_file_init,
+		.init = hns3_dbg_common_init_t2,
 	},
 	{
 		.name = "qos_pause_cfg",
 		.cmd = HNAE3_DBG_CMD_QOS_PAUSE_CFG,
 		.dentry = HNS3_DBG_DENTRY_TM,
 		.buf_len = HNS3_DBG_READ_LEN,
-		.init = hns3_dbg_common_file_init,
+		.init = hns3_dbg_common_init_t2,
 	},
 	{
 		.name = "qos_pri_map",
 		.cmd = HNAE3_DBG_CMD_QOS_PRI_MAP,
 		.dentry = HNS3_DBG_DENTRY_TM,
 		.buf_len = HNS3_DBG_READ_LEN,
-		.init = hns3_dbg_common_file_init,
+		.init = hns3_dbg_common_init_t2,
 	},
 	{
 		.name = "qos_dscp_map",
 		.cmd = HNAE3_DBG_CMD_QOS_DSCP_MAP,
 		.dentry = HNS3_DBG_DENTRY_TM,
 		.buf_len = HNS3_DBG_READ_LEN,
-		.init = hns3_dbg_common_file_init,
+		.init = hns3_dbg_common_init_t2,
 	},
 	{
 		.name = "qos_buf_cfg",
 		.cmd = HNAE3_DBG_CMD_QOS_BUF_CFG,
 		.dentry = HNS3_DBG_DENTRY_TM,
 		.buf_len = HNS3_DBG_READ_LEN,
-		.init = hns3_dbg_common_file_init,
+		.init = hns3_dbg_common_init_t2,
 	},
 	{
 		.name = "dev_info",
@@ -1144,6 +1145,28 @@ static int hns3_dbg_common_init_t1(struct hnae3_handle *handle, u32 cmd)
 	return 0;
 }
 
+static int hns3_dbg_common_init_t2(struct hnae3_handle *handle, u32 cmd)
+{
+	const struct hnae3_ae_ops *ops = hns3_get_ops(handle);
+	struct device *dev = &handle->pdev->dev;
+	struct dentry *entry_dir;
+	read_func func;
+	int ret;
+
+	if (!ops->dbg_get_read_func)
+		return 0;
+
+	ret = ops->dbg_get_read_func(handle, hns3_dbg_cmd[cmd].cmd, &func);
+	if (ret)
+		return ret;
+
+	entry_dir = hns3_dbg_dentry[hns3_dbg_cmd[cmd].dentry].dentry;
+	debugfs_create_devm_seqfile(dev, hns3_dbg_cmd[cmd].name, entry_dir,
+				    func);
+
+	return 0;
+}
+
 int hns3_dbg_init(struct hnae3_handle *handle)
 {
 	struct hnae3_ae_dev *ae_dev = hns3_get_ae_dev(handle);