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Message-Id: <1517501746-19075-2-git-send-email-stanislav.nijnikov@wdc.com>
Date: Thu, 1 Feb 2018 18:15:37 +0200
From: Stanislav Nijnikov <stanislav.nijnikov@....com>
To: linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
gregkh@...uxfoundation.org, jaegeuk@...nel.org
Cc: alex.lemberg@....com,
Stanislav Nijnikov <stanislav.nijnikov@....com>
Subject: [PATCH v4 01/10] ufs: sysfs: attribute group for existing sysfs entries.
This patch introduces attribute group to show existing sysfs entries.
Signed-off-by: Stanislav Nijnikov <stanislav.nijnikov@....com>
---
drivers/scsi/ufs/Makefile | 3 +-
drivers/scsi/ufs/ufs-sysfs.c | 164 +++++++++++++++++++++++++++++++++++++++++++
drivers/scsi/ufs/ufs-sysfs.h | 22 ++++++
drivers/scsi/ufs/ufshcd.c | 156 ++--------------------------------------
drivers/scsi/ufs/ufshcd.h | 2 +
5 files changed, 194 insertions(+), 153 deletions(-)
create mode 100644 drivers/scsi/ufs/ufs-sysfs.c
create mode 100644 drivers/scsi/ufs/ufs-sysfs.h
diff --git a/drivers/scsi/ufs/Makefile b/drivers/scsi/ufs/Makefile
index 9310c6c..918f579 100644
--- a/drivers/scsi/ufs/Makefile
+++ b/drivers/scsi/ufs/Makefile
@@ -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
diff --git a/drivers/scsi/ufs/ufs-sysfs.c b/drivers/scsi/ufs/ufs-sysfs.c
new file mode 100644
index 0000000..cc68a90
--- /dev/null
+++ b/drivers/scsi/ufs/ufs-sysfs.c
@@ -0,0 +1,164 @@
+//SPDX-License-Identifier: GPL-2.0-only
+//Copyright (C) 2018 Western Digital Corporation
+//This program is free software; you can redistribute it and/or modify it
+//under the terms of the GNU General Public License as published by the
+//Free Software Foundation; version 2.
+//
+//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/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);
+}
diff --git a/drivers/scsi/ufs/ufs-sysfs.h b/drivers/scsi/ufs/ufs-sysfs.h
new file mode 100644
index 0000000..c53c039
--- /dev/null
+++ b/drivers/scsi/ufs/ufs-sysfs.h
@@ -0,0 +1,22 @@
+/*SPDX-License-Identifier: GPL-2.0-only
+ *Copyright (C) 2018 Western Digital Corporation
+ *This program is free software; you can redistribute it and/or modify it
+ *under the terms of the GNU General Public License as published by the
+ *Free Software Foundation; version 2.
+ *
+ *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.
+ */
+
+#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
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index a355d98..e7621a0a 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -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;
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index 1332e54..53e2779 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -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 */
--
2.7.4
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