Commit cbb6813e authored by Stanislav Nijnikov's avatar Stanislav Nijnikov Committed by Martin K. Petersen
Browse files

scsi: ufs: sysfs: attribute group for existing sysfs entries. 



This patch introduces attribute group to show existing sysfs entries.

Signed-off-by: default avatarStanislav Nijnikov <stanislav.nijnikov@wdc.com>
Reviewed-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent f66b8517

drivers/scsi/ufs/Makefile

+2 −1
Original line number Diff line number Diff line
@@ -3,6 +3,7 @@ 
obj-$(CONFIG_SCSI_UFS_DWC_TC_PCI) += tc-dwc-g210-pci.o ufshcd-dwc.o tc-dwc-g210.o

obj-$(CONFIG_SCSI_UFS_DWC_TC_PLATFORM) += tc-dwc-g210-pltfrm.o ufshcd-dwc.o tc-dwc-g210.o

obj-$(CONFIG_SCSI_UFS_QCOM) += ufs-qcom.o

obj-$(CONFIG_SCSI_UFSHCD) += ufshcd.o

obj-$(CONFIG_SCSI_UFSHCD) += ufshcd-core.o

ufshcd-core-objs := ufshcd.o ufs-sysfs.o

obj-$(CONFIG_SCSI_UFSHCD_PCI) += ufshcd-pci.o

obj-$(CONFIG_SCSI_UFSHCD_PLATFORM) += ufshcd-pltfrm.o

drivers/scsi/ufs/ufs-sysfs.c

0 → 100644
+156 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0

// Copyright (C) 2018 Western Digital Corporation



#include <linux/err.h>

#include <linux/string.h>



#include "ufs-sysfs.h"



static const char *ufschd_uic_link_state_to_string(

			enum uic_link_state state)

{

	switch (state) {

	case UIC_LINK_OFF_STATE:	return "OFF";

	case UIC_LINK_ACTIVE_STATE:	return "ACTIVE";

	case UIC_LINK_HIBERN8_STATE:	return "HIBERN8";

	default:			return "UNKNOWN";

	}

}



static const char *ufschd_ufs_dev_pwr_mode_to_string(

			enum ufs_dev_pwr_mode state)

{

	switch (state) {

	case UFS_ACTIVE_PWR_MODE:	return "ACTIVE";

	case UFS_SLEEP_PWR_MODE:	return "SLEEP";

	case UFS_POWERDOWN_PWR_MODE:	return "POWERDOWN";

	default:			return "UNKNOWN";

	}

}



static inline ssize_t ufs_sysfs_pm_lvl_store(struct device *dev,

					     struct device_attribute *attr,

					     const char *buf, size_t count,

					     bool rpm)

{

	struct ufs_hba *hba = dev_get_drvdata(dev);

	unsigned long flags, value;



	if (kstrtoul(buf, 0, &value))

		return -EINVAL;



	if (value >= UFS_PM_LVL_MAX)

		return -EINVAL;



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

	if (rpm)

		hba->rpm_lvl = value;

	else

		hba->spm_lvl = value;

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

	return count;

}



static ssize_t rpm_lvl_show(struct device *dev,

		struct device_attribute *attr, char *buf)

{

	struct ufs_hba *hba = dev_get_drvdata(dev);

	int curr_len;

	u8 lvl;



	curr_len = snprintf(buf, PAGE_SIZE,

			    "\nCurrent Runtime PM level [%d] => dev_state [%s] link_state [%s]\n",

			    hba->rpm_lvl,

			    ufschd_ufs_dev_pwr_mode_to_string(

				ufs_pm_lvl_states[hba->rpm_lvl].dev_state),

			    ufschd_uic_link_state_to_string(

				ufs_pm_lvl_states[hba->rpm_lvl].link_state));



	curr_len += snprintf((buf + curr_len), (PAGE_SIZE - curr_len),

			     "\nAll available Runtime PM levels info:\n");

	for (lvl = UFS_PM_LVL_0; lvl < UFS_PM_LVL_MAX; lvl++)

		curr_len += snprintf((buf + curr_len), (PAGE_SIZE - curr_len),

				     "\tRuntime PM level [%d] => dev_state [%s] link_state [%s]\n",

				    lvl,

				    ufschd_ufs_dev_pwr_mode_to_string(

					ufs_pm_lvl_states[lvl].dev_state),

				    ufschd_uic_link_state_to_string(

					ufs_pm_lvl_states[lvl].link_state));



	return curr_len;

}



static ssize_t rpm_lvl_store(struct device *dev,

		struct device_attribute *attr, const char *buf, size_t count)

{

	return ufs_sysfs_pm_lvl_store(dev, attr, buf, count, true);

}



static ssize_t spm_lvl_show(struct device *dev,

		struct device_attribute *attr, char *buf)

{

	struct ufs_hba *hba = dev_get_drvdata(dev);

	int curr_len;

	u8 lvl;



	curr_len = snprintf(buf, PAGE_SIZE,

			    "\nCurrent System PM level [%d] => dev_state [%s] link_state [%s]\n",

			    hba->spm_lvl,

			    ufschd_ufs_dev_pwr_mode_to_string(

				ufs_pm_lvl_states[hba->spm_lvl].dev_state),

			    ufschd_uic_link_state_to_string(

				ufs_pm_lvl_states[hba->spm_lvl].link_state));



	curr_len += snprintf((buf + curr_len), (PAGE_SIZE - curr_len),

			     "\nAll available System PM levels info:\n");

	for (lvl = UFS_PM_LVL_0; lvl < UFS_PM_LVL_MAX; lvl++)

		curr_len += snprintf((buf + curr_len), (PAGE_SIZE - curr_len),

				     "\tSystem PM level [%d] => dev_state [%s] link_state [%s]\n",

				    lvl,

				    ufschd_ufs_dev_pwr_mode_to_string(

					ufs_pm_lvl_states[lvl].dev_state),

				    ufschd_uic_link_state_to_string(

					ufs_pm_lvl_states[lvl].link_state));



	return curr_len;

}



static ssize_t spm_lvl_store(struct device *dev,

		struct device_attribute *attr, const char *buf, size_t count)

{

	return ufs_sysfs_pm_lvl_store(dev, attr, buf, count, false);

}



static DEVICE_ATTR_RW(rpm_lvl);

static DEVICE_ATTR_RW(spm_lvl);



static struct attribute *ufs_sysfs_ufshcd_attrs[] = {

	&dev_attr_rpm_lvl.attr,

	&dev_attr_spm_lvl.attr,

	NULL

};



static const struct attribute_group ufs_sysfs_default_group = {

	.attrs = ufs_sysfs_ufshcd_attrs,

};



static const struct attribute_group *ufs_sysfs_groups[] = {

	&ufs_sysfs_default_group,

	NULL,

};



void ufs_sysfs_add_nodes(struct device *dev)

{

	int ret;



	ret = sysfs_create_groups(&dev->kobj, ufs_sysfs_groups);

	if (ret)

		dev_err(dev,

			"%s: sysfs groups creation failed (err = %d)\n",

			__func__, ret);

}



void ufs_sysfs_remove_nodes(struct device *dev)

{

	sysfs_remove_groups(&dev->kobj, ufs_sysfs_groups);

}

drivers/scsi/ufs/ufs-sysfs.h

0 → 100644
+14 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0

 * Copyright (C) 2018 Western Digital Corporation

 */



#ifndef __UFS_SYSFS_H__

#define __UFS_SYSFS_H__



#include <linux/sysfs.h>



#include "ufshcd.h"



void ufs_sysfs_add_nodes(struct device *dev);

void ufs_sysfs_remove_nodes(struct device *dev);

#endif

drivers/scsi/ufs/ufshcd.c

+4 −152
Original line number Diff line number Diff line
@@ -44,6 +44,7 @@ 
#include "ufshcd.h"

#include "ufs_quirks.h"

#include "unipro.h"

#include "ufs-sysfs.h"



#define CREATE_TRACE_POINTS

#include <trace/events/ufs.h>
@@ -150,7 +151,7 @@ enum { 
#define ufshcd_is_ufs_dev_poweroff(h) \

	((h)->curr_dev_pwr_mode == UFS_POWERDOWN_PWR_MODE)



static struct ufs_pm_lvl_states ufs_pm_lvl_states[] = {

struct ufs_pm_lvl_states ufs_pm_lvl_states[] = {

	{UFS_ACTIVE_PWR_MODE, UIC_LINK_ACTIVE_STATE},

	{UFS_ACTIVE_PWR_MODE, UIC_LINK_HIBERN8_STATE},

	{UFS_SLEEP_PWR_MODE, UIC_LINK_ACTIVE_STATE},
@@ -813,28 +814,6 @@ static inline bool ufshcd_is_hba_active(struct ufs_hba *hba) 
		? false : true;

}



static const char *ufschd_uic_link_state_to_string(

			enum uic_link_state state)

{

	switch (state) {

	case UIC_LINK_OFF_STATE:	return "OFF";

	case UIC_LINK_ACTIVE_STATE:	return "ACTIVE";

	case UIC_LINK_HIBERN8_STATE:	return "HIBERN8";

	default:			return "UNKNOWN";

	}

}



static const char *ufschd_ufs_dev_pwr_mode_to_string(

			enum ufs_dev_pwr_mode state)

{

	switch (state) {

	case UFS_ACTIVE_PWR_MODE:	return "ACTIVE";

	case UFS_SLEEP_PWR_MODE:	return "SLEEP";

	case UFS_POWERDOWN_PWR_MODE:	return "POWERDOWN";

	default:			return "UNKNOWN";

	}

}



u32 ufshcd_get_local_unipro_ver(struct ufs_hba *hba)

{

	/* HCI version 1.0 and 1.1 supports UniPro 1.41 */
@@ -7585,133 +7564,6 @@ int ufshcd_runtime_idle(struct ufs_hba *hba) 
}

EXPORT_SYMBOL(ufshcd_runtime_idle);



static inline ssize_t ufshcd_pm_lvl_store(struct device *dev,

					   struct device_attribute *attr,

					   const char *buf, size_t count,

					   bool rpm)

{

	struct ufs_hba *hba = dev_get_drvdata(dev);

	unsigned long flags, value;



	if (kstrtoul(buf, 0, &value))

		return -EINVAL;



	if (value >= UFS_PM_LVL_MAX)

		return -EINVAL;



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

	if (rpm)

		hba->rpm_lvl = value;

	else

		hba->spm_lvl = value;

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

	return count;

}



static ssize_t ufshcd_rpm_lvl_show(struct device *dev,

		struct device_attribute *attr, char *buf)

{

	struct ufs_hba *hba = dev_get_drvdata(dev);

	int curr_len;

	u8 lvl;



	curr_len = snprintf(buf, PAGE_SIZE,

			    "\nCurrent Runtime PM level [%d] => dev_state [%s] link_state [%s]\n",

			    hba->rpm_lvl,

			    ufschd_ufs_dev_pwr_mode_to_string(

				ufs_pm_lvl_states[hba->rpm_lvl].dev_state),

			    ufschd_uic_link_state_to_string(

				ufs_pm_lvl_states[hba->rpm_lvl].link_state));



	curr_len += snprintf((buf + curr_len), (PAGE_SIZE - curr_len),

			     "\nAll available Runtime PM levels info:\n");

	for (lvl = UFS_PM_LVL_0; lvl < UFS_PM_LVL_MAX; lvl++)

		curr_len += snprintf((buf + curr_len), (PAGE_SIZE - curr_len),

				     "\tRuntime PM level [%d] => dev_state [%s] link_state [%s]\n",

				    lvl,

				    ufschd_ufs_dev_pwr_mode_to_string(

					ufs_pm_lvl_states[lvl].dev_state),

				    ufschd_uic_link_state_to_string(

					ufs_pm_lvl_states[lvl].link_state));



	return curr_len;

}



static ssize_t ufshcd_rpm_lvl_store(struct device *dev,

		struct device_attribute *attr, const char *buf, size_t count)

{

	return ufshcd_pm_lvl_store(dev, attr, buf, count, true);

}



static void ufshcd_add_rpm_lvl_sysfs_nodes(struct ufs_hba *hba)

{

	hba->rpm_lvl_attr.show = ufshcd_rpm_lvl_show;

	hba->rpm_lvl_attr.store = ufshcd_rpm_lvl_store;

	sysfs_attr_init(&hba->rpm_lvl_attr.attr);

	hba->rpm_lvl_attr.attr.name = "rpm_lvl";

	hba->rpm_lvl_attr.attr.mode = 0644;

	if (device_create_file(hba->dev, &hba->rpm_lvl_attr))

		dev_err(hba->dev, "Failed to create sysfs for rpm_lvl\n");

}



static ssize_t ufshcd_spm_lvl_show(struct device *dev,

		struct device_attribute *attr, char *buf)

{

	struct ufs_hba *hba = dev_get_drvdata(dev);

	int curr_len;

	u8 lvl;



	curr_len = snprintf(buf, PAGE_SIZE,

			    "\nCurrent System PM level [%d] => dev_state [%s] link_state [%s]\n",

			    hba->spm_lvl,

			    ufschd_ufs_dev_pwr_mode_to_string(

				ufs_pm_lvl_states[hba->spm_lvl].dev_state),

			    ufschd_uic_link_state_to_string(

				ufs_pm_lvl_states[hba->spm_lvl].link_state));



	curr_len += snprintf((buf + curr_len), (PAGE_SIZE - curr_len),

			     "\nAll available System PM levels info:\n");

	for (lvl = UFS_PM_LVL_0; lvl < UFS_PM_LVL_MAX; lvl++)

		curr_len += snprintf((buf + curr_len), (PAGE_SIZE - curr_len),

				     "\tSystem PM level [%d] => dev_state [%s] link_state [%s]\n",

				    lvl,

				    ufschd_ufs_dev_pwr_mode_to_string(

					ufs_pm_lvl_states[lvl].dev_state),

				    ufschd_uic_link_state_to_string(

					ufs_pm_lvl_states[lvl].link_state));



	return curr_len;

}



static ssize_t ufshcd_spm_lvl_store(struct device *dev,

		struct device_attribute *attr, const char *buf, size_t count)

{

	return ufshcd_pm_lvl_store(dev, attr, buf, count, false);

}



static void ufshcd_add_spm_lvl_sysfs_nodes(struct ufs_hba *hba)

{

	hba->spm_lvl_attr.show = ufshcd_spm_lvl_show;

	hba->spm_lvl_attr.store = ufshcd_spm_lvl_store;

	sysfs_attr_init(&hba->spm_lvl_attr.attr);

	hba->spm_lvl_attr.attr.name = "spm_lvl";

	hba->spm_lvl_attr.attr.mode = 0644;

	if (device_create_file(hba->dev, &hba->spm_lvl_attr))

		dev_err(hba->dev, "Failed to create sysfs for spm_lvl\n");

}



static inline void ufshcd_add_sysfs_nodes(struct ufs_hba *hba)

{

	ufshcd_add_rpm_lvl_sysfs_nodes(hba);

	ufshcd_add_spm_lvl_sysfs_nodes(hba);

}



static inline void ufshcd_remove_sysfs_nodes(struct ufs_hba *hba)

{

	device_remove_file(hba->dev, &hba->rpm_lvl_attr);

	device_remove_file(hba->dev, &hba->spm_lvl_attr);

}



/**

 * ufshcd_shutdown - shutdown routine

 * @hba: per adapter instance
@@ -7749,7 +7601,7 @@ EXPORT_SYMBOL(ufshcd_shutdown); 
 */

void ufshcd_remove(struct ufs_hba *hba)

{

	ufshcd_remove_sysfs_nodes(hba);

	ufs_sysfs_remove_nodes(hba->dev);

	scsi_remove_host(hba->host);

	/* disable interrupts */

	ufshcd_disable_intr(hba, hba->intr_mask);
@@ -7996,7 +7848,7 @@ int ufshcd_init(struct ufs_hba *hba, void __iomem *mmio_base, unsigned int irq) 
	ufshcd_set_ufs_dev_active(hba);



	async_schedule(ufshcd_async_scan, hba);

	ufshcd_add_sysfs_nodes(hba);

	ufs_sysfs_add_nodes(hba->dev);



	return 0;

drivers/scsi/ufs/ufshcd.h

+2 −0
Original line number Diff line number Diff line
@@ -985,4 +985,6 @@ static inline void ufshcd_vops_dbg_register_dump(struct ufs_hba *hba) 
		hba->vops->dbg_register_dump(hba);

}



extern struct ufs_pm_lvl_states ufs_pm_lvl_states[];



#endif /* End of Header */

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