From: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Date: Thu, 15 Feb 2018 14:14:10 +0200
Subject: [PATCH] scsi: ufs: sysfs: flags
Git-commit: d10b2a8ea8fd0d6c8a667dc1950c8c061bfbbcdd
Patch-mainline: v4.17-rc1
References: bsc#1118139
This patch introduces a sysfs group entry for the UFS flags. The group adds
"flags" folder under the UFS driver sysfs entry
(/sys/bus/platform/drivers/ufshcd/*). The flags are shown as boolean value
("true" or "false"). The full information about the UFS flags could be
found at UFS specifications 2.1.
Signed-off-by: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Hannes Reinecke <hare@suse.com>
---
Documentation/ABI/testing/sysfs-driver-ufs | 65 ++++++++++++++++++++++++++++++
drivers/scsi/ufs/ufs-sysfs.c | 39 ++++++++++++++++++
drivers/scsi/ufs/ufs.h | 14 +++++--
3 files changed, 115 insertions(+), 3 deletions(-)
diff --git a/Documentation/ABI/testing/sysfs-driver-ufs b/Documentation/ABI/testing/sysfs-driver-ufs
index 57c6a9028108..f4f49e29e225 100644
--- a/Documentation/ABI/testing/sysfs-driver-ufs
+++ b/Documentation/ABI/testing/sysfs-driver-ufs
@@ -598,3 +598,68 @@ Description: This file shows the granularity of the LUN. This is one of
the UFS unit descriptor parameters. The full information
about the descriptor could be found at UFS specifications 2.1.
The file is read only.
+
+
+What: /sys/bus/platform/drivers/ufshcd/*/flags/device_init
+Date: February 2018
+Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
+Description: This file shows the device init status. The full information
+ about the flag could be found at UFS specifications 2.1.
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/flags/permanent_wpe
+Date: February 2018
+Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
+Description: This file shows whether permanent write protection is enabled.
+ The full information about the flag could be found at
+ UFS specifications 2.1.
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/flags/power_on_wpe
+Date: February 2018
+Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
+Description: This file shows whether write protection is enabled on all
+ logical units configured as power on write protected. The
+ full information about the flag could be found at
+ UFS specifications 2.1.
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/flags/bkops_enable
+Date: February 2018
+Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
+Description: This file shows whether the device background operations are
+ enabled. The full information about the flag could be
+ found at UFS specifications 2.1.
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/flags/life_span_mode_enable
+Date: February 2018
+Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
+Description: This file shows whether the device life span mode is enabled.
+ The full information about the flag could be found at
+ UFS specifications 2.1.
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/flags/phy_resource_removal
+Date: February 2018
+Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
+Description: This file shows whether physical resource removal is enable.
+ The full information about the flag could be found at
+ UFS specifications 2.1.
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/flags/busy_rtc
+Date: February 2018
+Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
+Description: This file shows whether the device is executing internal
+ operation related to real time clock. The full information
+ about the flag could be found at UFS specifications 2.1.
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/flags/disable_fw_update
+Date: February 2018
+Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
+Description: This file shows whether the device FW update is permanently
+ disabled. The full information about the flag could be found
+ at UFS specifications 2.1.
+ The file is read only.
diff --git a/drivers/scsi/ufs/ufs-sysfs.c b/drivers/scsi/ufs/ufs-sysfs.c
index cd4d9d039ee9..a09a8a2ed46c 100644
--- a/drivers/scsi/ufs/ufs-sysfs.c
+++ b/drivers/scsi/ufs/ufs-sysfs.c
@@ -538,6 +538,44 @@ static const struct attribute_group ufs_sysfs_string_descriptors_group = {
.attrs = ufs_sysfs_string_descriptors,
};
+#define UFS_FLAG(_name, _uname) \
+static ssize_t _name##_show(struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ bool flag; \
+ struct ufs_hba *hba = dev_get_drvdata(dev); \
+ if (ufshcd_query_flag(hba, UPIU_QUERY_OPCODE_READ_FLAG, \
+ QUERY_FLAG_IDN##_uname, &flag)) \
+ return -EINVAL; \
+ return sprintf(buf, "%s\n", flag ? "true" : "false"); \
+} \
+static DEVICE_ATTR_RO(_name)
+
+UFS_FLAG(device_init, _FDEVICEINIT);
+UFS_FLAG(permanent_wpe, _PERMANENT_WPE);
+UFS_FLAG(power_on_wpe, _PWR_ON_WPE);
+UFS_FLAG(bkops_enable, _BKOPS_EN);
+UFS_FLAG(life_span_mode_enable, _LIFE_SPAN_MODE_ENABLE);
+UFS_FLAG(phy_resource_removal, _FPHYRESOURCEREMOVAL);
+UFS_FLAG(busy_rtc, _BUSY_RTC);
+UFS_FLAG(disable_fw_update, _PERMANENTLY_DISABLE_FW_UPDATE);
+
+static struct attribute *ufs_sysfs_device_flags[] = {
+ &dev_attr_device_init.attr,
+ &dev_attr_permanent_wpe.attr,
+ &dev_attr_power_on_wpe.attr,
+ &dev_attr_bkops_enable.attr,
+ &dev_attr_life_span_mode_enable.attr,
+ &dev_attr_phy_resource_removal.attr,
+ &dev_attr_busy_rtc.attr,
+ &dev_attr_disable_fw_update.attr,
+ NULL,
+};
+
+static const struct attribute_group ufs_sysfs_flags_group = {
+ .name = "flags",
+ .attrs = ufs_sysfs_device_flags,
+};
static const struct attribute_group *ufs_sysfs_groups[] = {
&ufs_sysfs_default_group,
@@ -547,6 +585,7 @@ static const struct attribute_group *ufs_sysfs_groups[] = {
&ufs_sysfs_health_descriptor_group,
&ufs_sysfs_power_descriptor_group,
&ufs_sysfs_string_descriptors_group,
+ &ufs_sysfs_flags_group,
NULL,
};
diff --git a/drivers/scsi/ufs/ufs.h b/drivers/scsi/ufs/ufs.h
index 73870597e34c..df5e73e7de3e 100644
--- a/drivers/scsi/ufs/ufs.h
+++ b/drivers/scsi/ufs/ufs.h
@@ -130,9 +130,17 @@ enum {
/* Flag idn for Query Requests*/
enum flag_idn {
- QUERY_FLAG_IDN_FDEVICEINIT = 0x01,
- QUERY_FLAG_IDN_PWR_ON_WPE = 0x03,
- QUERY_FLAG_IDN_BKOPS_EN = 0x04,
+ QUERY_FLAG_IDN_FDEVICEINIT = 0x01,
+ QUERY_FLAG_IDN_PERMANENT_WPE = 0x02,
+ QUERY_FLAG_IDN_PWR_ON_WPE = 0x03,
+ QUERY_FLAG_IDN_BKOPS_EN = 0x04,
+ QUERY_FLAG_IDN_LIFE_SPAN_MODE_ENABLE = 0x05,
+ QUERY_FLAG_IDN_PURGE_ENABLE = 0x06,
+ QUERY_FLAG_IDN_RESERVED2 = 0x07,
+ QUERY_FLAG_IDN_FPHYRESOURCEREMOVAL = 0x08,
+ QUERY_FLAG_IDN_BUSY_RTC = 0x09,
+ QUERY_FLAG_IDN_RESERVED3 = 0x0A,
+ QUERY_FLAG_IDN_PERMANENTLY_DISABLE_FW_UPDATE = 0x0B,
};
/* Attribute idn for Query requests */
--
2.12.3