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Message-Id: <1514387627-27817-9-git-send-email-stanislav.nijnikov@wdc.com>
Date: Wed, 27 Dec 2017 17:13:46 +0200
From: Stanislav Nijnikov <stanislav.nijnikov@....com>
To: linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
gregkh@...uxfoundation.org
Cc: alex.lemberg@....com,
Stanislav Nijnikov <stanislav.nijnikov@....com>
Subject: [PATCH v2 8/9] ufs: sysfs: flags
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@....com>
---
Documentation/ABI/testing/sysfs-driver-ufs | 65 ++++++++++++++++++++++++++++++
drivers/scsi/ufs/ufs-sysfs.c | 42 +++++++++++++++++++
drivers/scsi/ufs/ufs.h | 14 +++++--
drivers/scsi/ufs/ufshcd.c | 1 +
4 files changed, 119 insertions(+), 3 deletions(-)
diff --git a/Documentation/ABI/testing/sysfs-driver-ufs b/Documentation/ABI/testing/sysfs-driver-ufs
index 5ff8dfa..832da97 100644
--- a/Documentation/ABI/testing/sysfs-driver-ufs
+++ b/Documentation/ABI/testing/sysfs-driver-ufs
@@ -597,4 +597,69 @@ Contact: Stanislav Nijnikov <stanislav.nijnikov@....com>
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: August 2017
+Contact: Stanislav Nijnikov <stanislav.nijnikov@....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: August 2017
+Contact: Stanislav Nijnikov <stanislav.nijnikov@....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: August 2017
+Contact: Stanislav Nijnikov <stanislav.nijnikov@....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: August 2017
+Contact: Stanislav Nijnikov <stanislav.nijnikov@....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: August 2017
+Contact: Stanislav Nijnikov <stanislav.nijnikov@....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: August 2017
+Contact: Stanislav Nijnikov <stanislav.nijnikov@....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: August 2017
+Contact: Stanislav Nijnikov <stanislav.nijnikov@....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: August 2017
+Contact: Stanislav Nijnikov <stanislav.nijnikov@....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.
\ No newline at end of file
diff --git a/drivers/scsi/ufs/ufs-sysfs.c b/drivers/scsi/ufs/ufs-sysfs.c
index 509abc9..de80c20 100644
--- a/drivers/scsi/ufs/ufs-sysfs.c
+++ b/drivers/scsi/ufs/ufs-sysfs.c
@@ -427,6 +427,47 @@ static const struct attribute_group ufs_sysfs_string_descriptors_group = {
.attrs = ufs_sysfs_string_descriptors,
};
+#define ufs_sysfs_flag_show(_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"); \
+}
+
+#define UFS_FLAG(_name, _uname) \
+ ufs_sysfs_flag_show(_name, _uname) \
+ 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_device_descriptor_group,
@@ -435,6 +476,7 @@ 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 7387059..df5e73e 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 */
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 0fb89a6..72e5b9a 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -2699,6 +2699,7 @@ int ufshcd_query_flag(struct ufs_hba *hba, enum query_opcode opcode,
ufshcd_release(hba);
return err;
}
+EXPORT_SYMBOL(ufshcd_query_flag);
/**
* ufshcd_query_attr - API function for sending attribute requests
--
2.7.4
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