drivers/scsi/ufs/ufs-qcom-debugfs.c - kernel/msm - Git at Google

 /*
  * Copyright (c) 2015,2017, Linux Foundation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 and
  * only version 2 as published by the Free Software Foundation.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  */

 #include <linux/debugfs.h>
 #include "ufs-qcom.h"
 #include "ufs-qcom-debugfs.h"
 #include "ufs-debugfs.h"

 #define TESTBUS_CFG_BUFF_LINE_SIZE	sizeof("0xXY, 0xXY")

 static void ufs_qcom_dbg_remove_debugfs(struct ufs_qcom_host *host);

 static int ufs_qcom_dbg_print_en_read(void *data, u64 *attr_val)
 {
 	struct ufs_qcom_host *host = data;

 	if (!host)
 		return -EINVAL;

 	*attr_val = (u64)host->dbg_print_en;
 	return 0;
 }

 static int ufs_qcom_dbg_print_en_set(void *data, u64 attr_id)
 {
 	struct ufs_qcom_host *host = data;

 	if (!host)
 		return -EINVAL;

 	if (attr_id & ~UFS_QCOM_DBG_PRINT_ALL)
 		return -EINVAL;

 	host->dbg_print_en = (u32)attr_id;
 	return 0;
 }

 DEFINE_SIMPLE_ATTRIBUTE(ufs_qcom_dbg_print_en_ops,
 			ufs_qcom_dbg_print_en_read,
 			ufs_qcom_dbg_print_en_set,
 			"%llu\n");

 static int ufs_qcom_dbg_testbus_en_read(void *data, u64 *attr_val)
 {
 	struct ufs_qcom_host *host = data;
 	bool enabled;

 	if (!host)
 		return -EINVAL;

 	enabled = !!(host->dbg_print_en & UFS_QCOM_DBG_PRINT_TEST_BUS_EN);
 	*attr_val = (u64)enabled;
 	return 0;
 }

 static int ufs_qcom_dbg_testbus_en_set(void *data, u64 attr_id)
 {
 	struct ufs_qcom_host *host = data;
 	int ret = 0;

 	if (!host)
 		return -EINVAL;

 	if (!!attr_id)
 		host->dbg_print_en |= UFS_QCOM_DBG_PRINT_TEST_BUS_EN;
 	else
 		host->dbg_print_en &= ~UFS_QCOM_DBG_PRINT_TEST_BUS_EN;

 	pm_runtime_get_sync(host->hba->dev);
 	ufshcd_hold(host->hba, false);
 	ret = ufs_qcom_testbus_config(host);
 	ufshcd_release(host->hba, false);
 	pm_runtime_put_sync(host->hba->dev);

 	return ret;
 }

 DEFINE_SIMPLE_ATTRIBUTE(ufs_qcom_dbg_testbus_en_ops,
 			ufs_qcom_dbg_testbus_en_read,
 			ufs_qcom_dbg_testbus_en_set,
 			"%llu\n");

 static int ufs_qcom_dbg_testbus_cfg_show(struct seq_file *file, void *data)
 {
 	struct ufs_qcom_host *host = (struct ufs_qcom_host *)file->private;

 	seq_printf(file , "Current configuration: major=%d, minor=%d\n\n",
 			host->testbus.select_major, host->testbus.select_minor);

 	/* Print usage */
 	seq_puts(file,
 		"To change the test-bus configuration, write 'MAJ,MIN' where:\n"
 		"MAJ - major select\n"
 		"MIN - minor select\n\n");
 	return 0;
 }

 static ssize_t ufs_qcom_dbg_testbus_cfg_write(struct file *file,
 				const char __user *ubuf, size_t cnt,
 				loff_t *ppos)
 {
 	struct ufs_qcom_host *host = file->f_mapping->host->i_private;
 	char configuration[TESTBUS_CFG_BUFF_LINE_SIZE] = {'\0'};
 	loff_t buff_pos = 0;
 	char *comma;
 	int ret = 0;
 	int major;
 	int minor;
 	unsigned long flags;
 	struct ufs_hba *hba = host->hba;


 	ret = simple_write_to_buffer(configuration,
 		TESTBUS_CFG_BUFF_LINE_SIZE - 1,
 		&buff_pos, ubuf, cnt);
 	if (ret < 0) {
 		dev_err(host->hba->dev, "%s: failed to read user data\n",
 			__func__);
 		goto out;
 	}
 	configuration[ret] = '\0';

 	comma = strnchr(configuration, TESTBUS_CFG_BUFF_LINE_SIZE, ',');
 	if (!comma || comma == configuration) {
 		dev_err(host->hba->dev,
 			"%s: error in configuration of testbus\n", __func__);
 		ret = -EINVAL;
 		goto out;
 	}

 	if (sscanf(configuration, "%i,%i", &major, &minor) != 2) {
 		dev_err(host->hba->dev,
 			"%s: couldn't parse input to 2 numeric values\n",
 			__func__);
 		ret = -EINVAL;
 		goto out;
 	}

 	if (!ufs_qcom_testbus_cfg_is_ok(host, major, minor)) {
 		ret = -EPERM;
 		goto out;
 	}

 	spin_lock_irqsave(hba->host->host_lock, flags);
 	host->testbus.select_major = (u8)major;
 	host->testbus.select_minor = (u8)minor;
 	spin_unlock_irqrestore(hba->host->host_lock, flags);

 	/*
 	 * Sanity check of the {major, minor} tuple is done in the
 	 * config function
 	 */
 	pm_runtime_get_sync(host->hba->dev);
 	ufshcd_hold(host->hba, false);
 	ret = ufs_qcom_testbus_config(host);
 	ufshcd_release(host->hba, false);
 	pm_runtime_put_sync(host->hba->dev);
 	if (!ret)
 		dev_dbg(host->hba->dev,
 				"%s: New configuration: major=%d, minor=%d\n",
 				__func__, host->testbus.select_major,
 				host->testbus.select_minor);

 out:
 	return ret ? ret : cnt;
 }

 static int ufs_qcom_dbg_testbus_cfg_open(struct inode *inode, struct file *file)
 {
 	return single_open(file, ufs_qcom_dbg_testbus_cfg_show,
 				inode->i_private);
 }

 static const struct file_operations ufs_qcom_dbg_testbus_cfg_desc = {
 	.open		= ufs_qcom_dbg_testbus_cfg_open,
 	.read		= seq_read,
 	.write		= ufs_qcom_dbg_testbus_cfg_write,
 };

 static int ufs_qcom_dbg_testbus_bus_read(void *data, u64 *attr_val)
 {
 	struct ufs_qcom_host *host = data;

 	if (!host)
 		return -EINVAL;

 	pm_runtime_get_sync(host->hba->dev);
 	ufshcd_hold(host->hba, false);
 	*attr_val = (u64)ufshcd_readl(host->hba, UFS_TEST_BUS);
 	ufshcd_release(host->hba, false);
 	pm_runtime_put_sync(host->hba->dev);
 	return 0;
 }

 DEFINE_SIMPLE_ATTRIBUTE(ufs_qcom_dbg_testbus_bus_ops,
 			ufs_qcom_dbg_testbus_bus_read,
 			NULL,
 			"%llu\n");

 static int ufs_qcom_dbg_dbg_regs_show(struct seq_file *file, void *data)
 {
 	struct ufs_qcom_host *host = (struct ufs_qcom_host *)file->private;
 	bool dbg_print_reg = !!(host->dbg_print_en &
 				UFS_QCOM_DBG_PRINT_REGS_EN);

 	pm_runtime_get_sync(host->hba->dev);
 	ufshcd_hold(host->hba, false);

 	/* Temporarily override the debug print enable */
 	host->dbg_print_en |= UFS_QCOM_DBG_PRINT_REGS_EN;
 	ufs_qcom_print_hw_debug_reg_all(host->hba, file, ufsdbg_pr_buf_to_std);
 	/* Restore previous debug print enable value */
 	if (!dbg_print_reg)
 		host->dbg_print_en &= ~UFS_QCOM_DBG_PRINT_REGS_EN;

 	ufshcd_release(host->hba, false);
 	pm_runtime_put_sync(host->hba->dev);

 	return 0;
 }

 static int ufs_qcom_dbg_dbg_regs_open(struct inode *inode,
 					      struct file *file)
 {
 	return single_open(file, ufs_qcom_dbg_dbg_regs_show,
 				inode->i_private);
 }

 static const struct file_operations ufs_qcom_dbg_dbg_regs_desc = {
 	.open		= ufs_qcom_dbg_dbg_regs_open,
 	.read		= seq_read,
 };

 static int ufs_qcom_dbg_pm_qos_show(struct seq_file *file, void *data)
 {
 	struct ufs_qcom_host *host = (struct ufs_qcom_host *)file->private;
 	unsigned long flags;
 	int i;

 	spin_lock_irqsave(host->hba->host->host_lock, flags);

 	seq_printf(file, "enabled: %d\n", host->pm_qos.is_enabled);
 	for (i = 0; i < host->pm_qos.num_groups && host->pm_qos.groups; i++)
 		seq_printf(file,
 			"CPU Group #%d(mask=0x%lx): active_reqs=%d, state=%d, latency=%d\n",
 			i, host->pm_qos.groups[i].mask.bits[0],
 			host->pm_qos.groups[i].active_reqs,
 			host->pm_qos.groups[i].state,
 			host->pm_qos.groups[i].latency_us);

 	spin_unlock_irqrestore(host->hba->host->host_lock, flags);

 	return 0;
 }

 static int ufs_qcom_dbg_pm_qos_open(struct inode *inode,
 					      struct file *file)
 {
 	return single_open(file, ufs_qcom_dbg_pm_qos_show, inode->i_private);
 }

 static const struct file_operations ufs_qcom_dbg_pm_qos_desc = {
 	.open		= ufs_qcom_dbg_pm_qos_open,
 	.read		= seq_read,
 };

 void ufs_qcom_dbg_add_debugfs(struct ufs_hba *hba, struct dentry *root)
 {
 	struct ufs_qcom_host *host;

 	if (!hba || !hba->priv) {
 		pr_err("%s: NULL host, exiting\n", __func__);
 		return;
 	}

 	host = hba->priv;
 	host->debugfs_files.debugfs_root = debugfs_create_dir("qcom", root);
 	if (IS_ERR(host->debugfs_files.debugfs_root))
 		/* Don't complain -- debugfs just isn't enabled */
 		goto err_no_root;
 	if (!host->debugfs_files.debugfs_root) {
 		/*
 		 * Complain -- debugfs is enabled, but it failed to
 		 * create the directory
 		 */
 		dev_err(host->hba->dev,
 			"%s: NULL debugfs root directory, exiting", __func__);
 		goto err_no_root;
 	}

 	host->debugfs_files.dbg_print_en =
 		debugfs_create_file("dbg_print_en", S_IRUSR | S_IWUSR,
 				    host->debugfs_files.debugfs_root, host,
 				    &ufs_qcom_dbg_print_en_ops);
 	if (!host->debugfs_files.dbg_print_en) {
 		dev_err(host->hba->dev,
 			"%s: failed to create dbg_print_en debugfs entry\n",
 			__func__);
 		goto err;
 	}

 	host->debugfs_files.testbus = debugfs_create_dir("testbus",
 					host->debugfs_files.debugfs_root);
 	if (!host->debugfs_files.testbus) {
 		dev_err(host->hba->dev,
 			"%s: failed create testbus directory\n",
 			__func__);
 		goto err;
 	}

 	host->debugfs_files.testbus_en =
 		debugfs_create_file("enable", S_IRUSR | S_IWUSR,
 				    host->debugfs_files.testbus, host,
 				    &ufs_qcom_dbg_testbus_en_ops);
 	if (!host->debugfs_files.testbus_en) {
 		dev_err(host->hba->dev,
 			"%s: failed create testbus_en debugfs entry\n",
 			__func__);
 		goto err;
 	}

 	host->debugfs_files.testbus_cfg =
 		debugfs_create_file("configuration", S_IRUSR | S_IWUSR,
 				    host->debugfs_files.testbus, host,
 				    &ufs_qcom_dbg_testbus_cfg_desc);
 	if (!host->debugfs_files.testbus_cfg) {
 		dev_err(host->hba->dev,
 			"%s: failed create testbus_cfg debugfs entry\n",
 			__func__);
 		goto err;
 	}

 	host->debugfs_files.testbus_bus =
 		debugfs_create_file("TEST_BUS", S_IRUSR,
 				    host->debugfs_files.testbus, host,
 				    &ufs_qcom_dbg_testbus_bus_ops);
 	if (!host->debugfs_files.testbus_bus) {
 		dev_err(host->hba->dev,
 			"%s: failed create testbus_bus debugfs entry\n",
 			__func__);
 		goto err;
 	}

 	host->debugfs_files.dbg_regs =
 		debugfs_create_file("debug-regs", S_IRUSR,
 				    host->debugfs_files.debugfs_root, host,
 				    &ufs_qcom_dbg_dbg_regs_desc);
 	if (!host->debugfs_files.dbg_regs) {
 		dev_err(host->hba->dev,
 			"%s: failed create dbg_regs debugfs entry\n",
 			__func__);
 		goto err;
 	}

 	host->debugfs_files.pm_qos =
 		debugfs_create_file("pm_qos", S_IRUSR,
 				host->debugfs_files.debugfs_root, host,
 				&ufs_qcom_dbg_pm_qos_desc);
 		if (!host->debugfs_files.dbg_regs) {
 			dev_err(host->hba->dev,
 				"%s: failed create dbg_regs debugfs entry\n",
 				__func__);
 			goto err;
 		}

 	return;

 err:
 	ufs_qcom_dbg_remove_debugfs(host);
 err_no_root:
 	dev_err(host->hba->dev, "%s: failed to initialize debugfs\n", __func__);
 }

 static void ufs_qcom_dbg_remove_debugfs(struct ufs_qcom_host *host)
 {
 	debugfs_remove_recursive(host->debugfs_files.debugfs_root);
 	host->debugfs_files.debugfs_root = NULL;
 }
	/*
	* Copyright (c) 2015,2017, Linux Foundation. All rights reserved.
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License version 2 and
	* only version 2 as published by the Free Software Foundation.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	*/

	#include <linux/debugfs.h>
	#include "ufs-qcom.h"
	#include "ufs-qcom-debugfs.h"
	#include "ufs-debugfs.h"

	#define TESTBUS_CFG_BUFF_LINE_SIZE sizeof("0xXY, 0xXY")

	static void ufs_qcom_dbg_remove_debugfs(struct ufs_qcom_host *host);

	static int ufs_qcom_dbg_print_en_read(void data, u64 attr_val)
	{
	struct ufs_qcom_host *host = data;

	if (!host)
	return -EINVAL;

	*attr_val = (u64)host->dbg_print_en;
	return 0;
	}

	static int ufs_qcom_dbg_print_en_set(void *data, u64 attr_id)
	{
	struct ufs_qcom_host *host = data;

	if (!host)
	return -EINVAL;

	if (attr_id & ~UFS_QCOM_DBG_PRINT_ALL)
	return -EINVAL;

	host->dbg_print_en = (u32)attr_id;
	return 0;
	}

	DEFINE_SIMPLE_ATTRIBUTE(ufs_qcom_dbg_print_en_ops,
	ufs_qcom_dbg_print_en_read,
	ufs_qcom_dbg_print_en_set,
	"%llu\n");

	static int ufs_qcom_dbg_testbus_en_read(void data, u64 attr_val)
	{
	struct ufs_qcom_host *host = data;
	bool enabled;

	if (!host)
	return -EINVAL;

	enabled = !!(host->dbg_print_en & UFS_QCOM_DBG_PRINT_TEST_BUS_EN);
	*attr_val = (u64)enabled;
	return 0;
	}

	static int ufs_qcom_dbg_testbus_en_set(void *data, u64 attr_id)
	{
	struct ufs_qcom_host *host = data;
	int ret = 0;

	if (!host)
	return -EINVAL;

	if (!!attr_id)
	host->dbg_print_en \|= UFS_QCOM_DBG_PRINT_TEST_BUS_EN;
	else
	host->dbg_print_en &= ~UFS_QCOM_DBG_PRINT_TEST_BUS_EN;

	pm_runtime_get_sync(host->hba->dev);
	ufshcd_hold(host->hba, false);
	ret = ufs_qcom_testbus_config(host);
	ufshcd_release(host->hba, false);
	pm_runtime_put_sync(host->hba->dev);

	return ret;
	}

	DEFINE_SIMPLE_ATTRIBUTE(ufs_qcom_dbg_testbus_en_ops,
	ufs_qcom_dbg_testbus_en_read,
	ufs_qcom_dbg_testbus_en_set,
	"%llu\n");

	static int ufs_qcom_dbg_testbus_cfg_show(struct seq_file file, void data)
	{
	struct ufs_qcom_host host = (struct ufs_qcom_host )file->private;

	seq_printf(file , "Current configuration: major=%d, minor=%d\n\n",
	host->testbus.select_major, host->testbus.select_minor);

	/* Print usage */
	seq_puts(file,
	"To change the test-bus configuration, write 'MAJ,MIN' where:\n"
	"MAJ - major select\n"
	"MIN - minor select\n\n");
	return 0;
	}

	static ssize_t ufs_qcom_dbg_testbus_cfg_write(struct file *file,
	const char __user *ubuf, size_t cnt,
	loff_t *ppos)
	{
	struct ufs_qcom_host *host = file->f_mapping->host->i_private;
	char configuration[TESTBUS_CFG_BUFF_LINE_SIZE] = {'\0'};
	loff_t buff_pos = 0;
	char *comma;
	int ret = 0;
	int major;
	int minor;
	unsigned long flags;
	struct ufs_hba *hba = host->hba;


	ret = simple_write_to_buffer(configuration,
	TESTBUS_CFG_BUFF_LINE_SIZE - 1,
	&buff_pos, ubuf, cnt);
	if (ret < 0) {
	dev_err(host->hba->dev, "%s: failed to read user data\n",
	__func__);
	goto out;
	}
	configuration[ret] = '\0';

	comma = strnchr(configuration, TESTBUS_CFG_BUFF_LINE_SIZE, ',');
	if (!comma \|\| comma == configuration) {
	dev_err(host->hba->dev,
	"%s: error in configuration of testbus\n", __func__);
	ret = -EINVAL;
	goto out;
	}

	if (sscanf(configuration, "%i,%i", &major, &minor) != 2) {
	dev_err(host->hba->dev,
	"%s: couldn't parse input to 2 numeric values\n",
	__func__);
	ret = -EINVAL;
	goto out;
	}

	if (!ufs_qcom_testbus_cfg_is_ok(host, major, minor)) {
	ret = -EPERM;
	goto out;
	}

	spin_lock_irqsave(hba->host->host_lock, flags);
	host->testbus.select_major = (u8)major;
	host->testbus.select_minor = (u8)minor;
	spin_unlock_irqrestore(hba->host->host_lock, flags);

	/*
	* Sanity check of the {major, minor} tuple is done in the
	* config function
	*/
	pm_runtime_get_sync(host->hba->dev);
	ufshcd_hold(host->hba, false);
	ret = ufs_qcom_testbus_config(host);
	ufshcd_release(host->hba, false);
	pm_runtime_put_sync(host->hba->dev);
	if (!ret)
	dev_dbg(host->hba->dev,
	"%s: New configuration: major=%d, minor=%d\n",
	__func__, host->testbus.select_major,
	host->testbus.select_minor);

	out:
	return ret ? ret : cnt;
	}

	static int ufs_qcom_dbg_testbus_cfg_open(struct inode inode, struct file file)
	{
	return single_open(file, ufs_qcom_dbg_testbus_cfg_show,
	inode->i_private);
	}

	static const struct file_operations ufs_qcom_dbg_testbus_cfg_desc = {
	.open = ufs_qcom_dbg_testbus_cfg_open,
	.read = seq_read,
	.write = ufs_qcom_dbg_testbus_cfg_write,
	};

	static int ufs_qcom_dbg_testbus_bus_read(void data, u64 attr_val)
	{
	struct ufs_qcom_host *host = data;

	if (!host)
	return -EINVAL;

	pm_runtime_get_sync(host->hba->dev);
	ufshcd_hold(host->hba, false);
	*attr_val = (u64)ufshcd_readl(host->hba, UFS_TEST_BUS);
	ufshcd_release(host->hba, false);
	pm_runtime_put_sync(host->hba->dev);
	return 0;
	}

	DEFINE_SIMPLE_ATTRIBUTE(ufs_qcom_dbg_testbus_bus_ops,
	ufs_qcom_dbg_testbus_bus_read,
	NULL,
	"%llu\n");

	static int ufs_qcom_dbg_dbg_regs_show(struct seq_file file, void data)
	{
	struct ufs_qcom_host host = (struct ufs_qcom_host )file->private;
	bool dbg_print_reg = !!(host->dbg_print_en &
	UFS_QCOM_DBG_PRINT_REGS_EN);

	pm_runtime_get_sync(host->hba->dev);
	ufshcd_hold(host->hba, false);

	/* Temporarily override the debug print enable */
	host->dbg_print_en \|= UFS_QCOM_DBG_PRINT_REGS_EN;
	ufs_qcom_print_hw_debug_reg_all(host->hba, file, ufsdbg_pr_buf_to_std);
	/* Restore previous debug print enable value */
	if (!dbg_print_reg)
	host->dbg_print_en &= ~UFS_QCOM_DBG_PRINT_REGS_EN;

	ufshcd_release(host->hba, false);
	pm_runtime_put_sync(host->hba->dev);

	return 0;
	}

	static int ufs_qcom_dbg_dbg_regs_open(struct inode *inode,
	struct file *file)
	{
	return single_open(file, ufs_qcom_dbg_dbg_regs_show,
	inode->i_private);
	}

	static const struct file_operations ufs_qcom_dbg_dbg_regs_desc = {
	.open = ufs_qcom_dbg_dbg_regs_open,
	.read = seq_read,
	};

	static int ufs_qcom_dbg_pm_qos_show(struct seq_file file, void data)
	{
	struct ufs_qcom_host host = (struct ufs_qcom_host )file->private;
	unsigned long flags;
	int i;

	spin_lock_irqsave(host->hba->host->host_lock, flags);

	seq_printf(file, "enabled: %d\n", host->pm_qos.is_enabled);
	for (i = 0; i < host->pm_qos.num_groups && host->pm_qos.groups; i++)
	seq_printf(file,
	"CPU Group #%d(mask=0x%lx): active_reqs=%d, state=%d, latency=%d\n",
	i, host->pm_qos.groups[i].mask.bits[0],
	host->pm_qos.groups[i].active_reqs,
	host->pm_qos.groups[i].state,
	host->pm_qos.groups[i].latency_us);

	spin_unlock_irqrestore(host->hba->host->host_lock, flags);

	return 0;
	}

	static int ufs_qcom_dbg_pm_qos_open(struct inode *inode,
	struct file *file)
	{
	return single_open(file, ufs_qcom_dbg_pm_qos_show, inode->i_private);
	}

	static const struct file_operations ufs_qcom_dbg_pm_qos_desc = {
	.open = ufs_qcom_dbg_pm_qos_open,
	.read = seq_read,
	};

	void ufs_qcom_dbg_add_debugfs(struct ufs_hba hba, struct dentry root)
	{
	struct ufs_qcom_host *host;

	if (!hba \|\| !hba->priv) {
	pr_err("%s: NULL host, exiting\n", __func__);
	return;
	}

	host = hba->priv;
	host->debugfs_files.debugfs_root = debugfs_create_dir("qcom", root);
	if (IS_ERR(host->debugfs_files.debugfs_root))
	/* Don't complain -- debugfs just isn't enabled */
	goto err_no_root;
	if (!host->debugfs_files.debugfs_root) {
	/*
	* Complain -- debugfs is enabled, but it failed to
	* create the directory
	*/
	dev_err(host->hba->dev,
	"%s: NULL debugfs root directory, exiting", __func__);
	goto err_no_root;
	}

	host->debugfs_files.dbg_print_en =
	debugfs_create_file("dbg_print_en", S_IRUSR \| S_IWUSR,
	host->debugfs_files.debugfs_root, host,
	&ufs_qcom_dbg_print_en_ops);
	if (!host->debugfs_files.dbg_print_en) {
	dev_err(host->hba->dev,
	"%s: failed to create dbg_print_en debugfs entry\n",
	__func__);
	goto err;
	}

	host->debugfs_files.testbus = debugfs_create_dir("testbus",
	host->debugfs_files.debugfs_root);
	if (!host->debugfs_files.testbus) {
	dev_err(host->hba->dev,
	"%s: failed create testbus directory\n",
	__func__);
	goto err;
	}

	host->debugfs_files.testbus_en =
	debugfs_create_file("enable", S_IRUSR \| S_IWUSR,
	host->debugfs_files.testbus, host,
	&ufs_qcom_dbg_testbus_en_ops);
	if (!host->debugfs_files.testbus_en) {
	dev_err(host->hba->dev,
	"%s: failed create testbus_en debugfs entry\n",
	__func__);
	goto err;
	}

	host->debugfs_files.testbus_cfg =
	debugfs_create_file("configuration", S_IRUSR \| S_IWUSR,
	host->debugfs_files.testbus, host,
	&ufs_qcom_dbg_testbus_cfg_desc);
	if (!host->debugfs_files.testbus_cfg) {
	dev_err(host->hba->dev,
	"%s: failed create testbus_cfg debugfs entry\n",
	__func__);
	goto err;
	}

	host->debugfs_files.testbus_bus =
	debugfs_create_file("TEST_BUS", S_IRUSR,
	host->debugfs_files.testbus, host,
	&ufs_qcom_dbg_testbus_bus_ops);
	if (!host->debugfs_files.testbus_bus) {
	dev_err(host->hba->dev,
	"%s: failed create testbus_bus debugfs entry\n",
	__func__);
	goto err;
	}

	host->debugfs_files.dbg_regs =
	debugfs_create_file("debug-regs", S_IRUSR,
	host->debugfs_files.debugfs_root, host,
	&ufs_qcom_dbg_dbg_regs_desc);
	if (!host->debugfs_files.dbg_regs) {
	dev_err(host->hba->dev,
	"%s: failed create dbg_regs debugfs entry\n",
	__func__);
	goto err;
	}

	host->debugfs_files.pm_qos =
	debugfs_create_file("pm_qos", S_IRUSR,
	host->debugfs_files.debugfs_root, host,
	&ufs_qcom_dbg_pm_qos_desc);
	if (!host->debugfs_files.dbg_regs) {
	dev_err(host->hba->dev,
	"%s: failed create dbg_regs debugfs entry\n",
	__func__);
	goto err;
	}

	return;

	err:
	ufs_qcom_dbg_remove_debugfs(host);
	err_no_root:
	dev_err(host->hba->dev, "%s: failed to initialize debugfs\n", __func__);
	}

	static void ufs_qcom_dbg_remove_debugfs(struct ufs_qcom_host *host)
	{
	debugfs_remove_recursive(host->debugfs_files.debugfs_root);
	host->debugfs_files.debugfs_root = NULL;
	}