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Message-Id: <1514190878-5571-2-git-send-email-stanislav.nijnikov@wdc.com>
Date: Mon, 25 Dec 2017 10:34:30 +0200
From: Stanislav Nijnikov <stanislav.nijnikov@....com>
To: linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: alex.lemberg@....com,
Stanislav Nijnikov <stanislav.nijnikov@....com>
Subject: [PATCH v1 1/9] ufs: sysfs: device descriptor
Signed-off-by: Stanislav Nijnikov <stanislav.nijnikov@....com>
---
Documentation/ABI/testing/sysfs-driver-ufs | 223 +++++++++++++++++++++++++++++
drivers/scsi/ufs/Makefile | 2 +-
drivers/scsi/ufs/ufs-sysfs.c | 154 ++++++++++++++++++++
drivers/scsi/ufs/ufs-sysfs.h | 10 ++
drivers/scsi/ufs/ufs.h | 8 ++
drivers/scsi/ufs/ufshcd.c | 12 +-
drivers/scsi/ufs/ufshcd.h | 4 +
7 files changed, 407 insertions(+), 6 deletions(-)
create mode 100644 Documentation/ABI/testing/sysfs-driver-ufs
create mode 100644 drivers/scsi/ufs/ufs-sysfs.c
create mode 100644 drivers/scsi/ufs/ufs-sysfs.h
diff --git a/Documentation/ABI/testing/sysfs-driver-ufs b/Documentation/ABI/testing/sysfs-driver-ufs
new file mode 100644
index 0000000..da39c63
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-driver-ufs
@@ -0,0 +1,223 @@
+What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/device_type
+Date: August 2017
+Contact: Stanislav Nijnikov <stanislav.nijnikov@....com>
+Description: This file shows the device type. This is one of the UFS
+ device 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/*/device_descriptor/device_class
+Date: August 2017
+Contact: Stanislav Nijnikov <stanislav.nijnikov@....com>
+Description: This file shows the device class. This is one of the UFS
+ device 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/*/device_descriptor/device_sub_class
+Date: August 2017
+Contact: Stanislav Nijnikov <stanislav.nijnikov@....com>
+Description: This file shows the UFS storage subclass. This is one of
+ the UFS device 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/*/device_descriptor/protocol
+Date: August 2017
+Contact: Stanislav Nijnikov <stanislav.nijnikov@....com>
+Description: This file shows the protocol supported by an UFS device.
+ This is one of the UFS device 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/*/device_descriptor/number_of_luns
+Date: August 2017
+Contact: Stanislav Nijnikov <stanislav.nijnikov@....com>
+Description: This file shows number of logical units. This is one of
+ the UFS device 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/*/device_descriptor/number_of_wluns
+Date: August 2017
+Contact: Stanislav Nijnikov <stanislav.nijnikov@....com>
+Description: This file shows number of well known logical units.
+ This is one of the UFS device 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/*/device_descriptor/boot_enable
+Date: August 2017
+Contact: Stanislav Nijnikov <stanislav.nijnikov@....com>
+Description: This file shows value that indicates whether the device is
+ enabled for boot. This is one of the UFS device 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/*/device_descriptor/descriptor_access_enable
+Date: August 2017
+Contact: Stanislav Nijnikov <stanislav.nijnikov@....com>
+Description: This file shows value that indicates whether the device
+ descriptor could be read after partial initialization phase
+ of the boot sequence. This is one of the UFS device 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/*/device_descriptor/initial_power_mode
+Date: August 2017
+Contact: Stanislav Nijnikov <stanislav.nijnikov@....com>
+Description: This file shows value that defines the power mode after
+ device initialization or hardware reset. This is one of
+ the UFS device 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/*/device_descriptor/high_priority_lun
+Date: August 2017
+Contact: Stanislav Nijnikov <stanislav.nijnikov@....com>
+Description: This file shows the high priority lun. This is one of
+ the UFS device 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/*/device_descriptor/secure_removal_type
+Date: August 2017
+Contact: Stanislav Nijnikov <stanislav.nijnikov@....com>
+Description: This file shows the secure removal type. This is one of
+ the UFS device 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/*/device_descriptor/support_security_lun
+Date: August 2017
+Contact: Stanislav Nijnikov <stanislav.nijnikov@....com>
+Description: This file shows whether the security lun is supported.
+ This is one of the UFS device 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/*/device_descriptor/bkops_termination_latency
+Date: August 2017
+Contact: Stanislav Nijnikov <stanislav.nijnikov@....com>
+Description: This file shows the background operations termination
+ latency. This is one of the UFS device 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/*/device_descriptor/initial_active_icc_level
+Date: August 2017
+Contact: Stanislav Nijnikov <stanislav.nijnikov@....com>
+Description: This file shows the initial active ICC level. This is one
+ of the UFS device 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/*/device_descriptor/specification_version
+Date: August 2017
+Contact: Stanislav Nijnikov <stanislav.nijnikov@....com>
+Description: This file shows the specification version. This is one
+ of the UFS device 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/*/device_descriptor/manufacturing_date
+Date: August 2017
+Contact: Stanislav Nijnikov <stanislav.nijnikov@....com>
+Description: This file shows the manufacturing date in BCD format.
+ This is one of the UFS device 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/*/device_descriptor/manufacturer_id
+Date: August 2017
+Contact: Stanislav Nijnikov <stanislav.nijnikov@....com>
+Description: This file shows the manufacturee ID. This is one of the
+ UFS device 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/*/device_descriptor/rtt_capability
+Date: August 2017
+Contact: Stanislav Nijnikov <stanislav.nijnikov@....com>
+Description: This file shows the maximum number of outstanding RTTs
+ supported by the device. This is one of the UFS device
+ 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/*/device_descriptor/rtc_update
+Date: August 2017
+Contact: Stanislav Nijnikov <stanislav.nijnikov@....com>
+Description: This file shows the frequency and method of the realtime
+ clock update. This is one of the UFS device 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/*/device_descriptor/ufs_features
+Date: August 2017
+Contact: Stanislav Nijnikov <stanislav.nijnikov@....com>
+Description: This file shows which features are supported by the device.
+ This is one of the UFS device 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/*/device_descriptor/ffu_timeout
+Date: August 2017
+Contact: Stanislav Nijnikov <stanislav.nijnikov@....com>
+Description: This file shows the FFU timeout. This is one of the
+ UFS device 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/*/device_descriptor/queue_depth
+Date: August 2017
+Contact: Stanislav Nijnikov <stanislav.nijnikov@....com>
+Description: This file shows the device queue depth. This is one of the
+ UFS device 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/*/device_descriptor/device_version
+Date: August 2017
+Contact: Stanislav Nijnikov <stanislav.nijnikov@....com>
+Description: This file shows the device version. This is one of the
+ UFS device 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/*/device_descriptor/number_of_secure_wpa
+Date: August 2017
+Contact: Stanislav Nijnikov <stanislav.nijnikov@....com>
+Description: This file shows number of secure write protect areas
+ supported by the device. This is one of the UFS device
+ 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/*/device_descriptor/psa_max_data_size
+Date: August 2017
+Contact: Stanislav Nijnikov <stanislav.nijnikov@....com>
+Description: This file shows the maximum amount of data that may be
+ written during the pre-soldering phase of the PSA flow.
+ This is one of the UFS device 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/*/device_descriptor/psa_state_timeout
+Date: August 2017
+Contact: Stanislav Nijnikov <stanislav.nijnikov@....com>
+Description: This file shows the command maximum timeout for a change
+ in PSA state. This is one of the UFS device descriptor
+ parameters. The full information about the descriptor could
+ be found at UFS specifications 2.1.
+ The file is read only.
diff --git a/drivers/scsi/ufs/Makefile b/drivers/scsi/ufs/Makefile
index 6e77cb0..953a31e9f 100644
--- a/drivers/scsi/ufs/Makefile
+++ b/drivers/scsi/ufs/Makefile
@@ -2,6 +2,6 @@
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-$(CONFIG_SCSI_UFSHCD) += ufshcd.o ufs-sysfs.o
obj-$(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..1d7867c
--- /dev/null
+++ b/drivers/scsi/ufs/ufs-sysfs.c
@@ -0,0 +1,154 @@
+#include <linux/err.h>
+#include <linux/string.h>
+
+#include "ufs.h"
+#include "ufs-sysfs.h"
+/* collision between the device descriptor parameter and the definition */
+#undef DEVICE_CLASS
+
+enum ufs_desc_param_size {
+ UFS_PARAM_BYTE_SIZE = 1,
+ UFS_PARAM_WORD_SIZE = 2,
+ UFS_PARAM_DWORD_SIZE = 4,
+ UFS_PARAM_QWORD_SIZE = 8,
+};
+
+static inline ssize_t ufs_sysfs_read_desc_param(
+ struct ufs_hba *hba, u8 desc_idn, u8 index, char *buf, u8 off,
+ enum ufs_desc_param_size param_size)
+{
+ int desc_len;
+ int ret;
+ u8 *desc_buf;
+
+ if (ufshcd_map_desc_id_to_length(hba, desc_idn, &desc_len) ||
+ off >= desc_len)
+ return -EINVAL;
+ desc_buf = kzalloc(desc_len, GFP_ATOMIC);
+ if (!desc_buf)
+ return -ENOMEM;
+ ret = ufshcd_query_descriptor_retry(hba, UPIU_QUERY_OPCODE_READ_DESC,
+ desc_idn, index, 0, desc_buf, &desc_len);
+ if (ret)
+ return -EINVAL;
+ switch (param_size) {
+ case UFS_PARAM_BYTE_SIZE:
+ ret = sprintf(buf, "0x%02X\n", desc_buf[off]);
+ break;
+ case UFS_PARAM_WORD_SIZE:
+ ret = sprintf(buf, "0x%04X\n",
+ be16_to_cpu(*((u16 *)(desc_buf + off))));
+ break;
+ case UFS_PARAM_DWORD_SIZE:
+ ret = sprintf(buf, "0x%08X\n",
+ be32_to_cpu(*((u32 *)(desc_buf + off))));
+ break;
+ case UFS_PARAM_QWORD_SIZE:
+ ret = sprintf(buf, "0x%016llX\n",
+ be64_to_cpu(*((u64 *)(desc_buf + off))));
+ break;
+ }
+ kfree(desc_buf);
+
+ return ret;
+}
+
+#define ufs_sysfs_desc_param_show(_name, _puname, _duname, _size) \
+static ssize_t _name##_show(struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ struct ufs_hba *hba = dev_get_drvdata(dev); \
+ return ufs_sysfs_read_desc_param(hba, QUERY_DESC_IDN_##_duname, \
+ 0, buf, _duname##_DESC_PARAM_##_puname, \
+ UFS_PARAM_##_size##_SIZE); \
+}
+
+#define UFS_DESC_PARAM(_pname, _puname, _duname, _size) \
+ ufs_sysfs_desc_param_show(_pname, _puname, _duname, _size) \
+ static DEVICE_ATTR_RO(_pname)
+
+#define UFS_DEVICE_DESC_PARAM(_name, _uname, _size) \
+ UFS_DESC_PARAM(_name, _uname, DEVICE, _size)
+
+UFS_DEVICE_DESC_PARAM(device_type, DEVICE_TYPE, BYTE);
+UFS_DEVICE_DESC_PARAM(device_class, DEVICE_CLASS, BYTE);
+UFS_DEVICE_DESC_PARAM(device_sub_class, DEVICE_SUB_CLASS, BYTE);
+UFS_DEVICE_DESC_PARAM(protocol, PRTCL, BYTE);
+UFS_DEVICE_DESC_PARAM(number_of_luns, NUM_LU, BYTE);
+UFS_DEVICE_DESC_PARAM(number_of_wluns, NUM_WLU, BYTE);
+UFS_DEVICE_DESC_PARAM(boot_enable, BOOT_ENBL, BYTE);
+UFS_DEVICE_DESC_PARAM(descriptor_access_enable, DESC_ACCSS_ENBL, BYTE);
+UFS_DEVICE_DESC_PARAM(initial_power_mode, INIT_PWR_MODE, BYTE);
+UFS_DEVICE_DESC_PARAM(high_priority_lun, HIGH_PR_LUN, BYTE);
+UFS_DEVICE_DESC_PARAM(secure_removal_type, SEC_RMV_TYPE, BYTE);
+UFS_DEVICE_DESC_PARAM(support_security_lun, SEC_LU, BYTE);
+UFS_DEVICE_DESC_PARAM(bkops_termination_latency, BKOP_TERM_LT, BYTE);
+UFS_DEVICE_DESC_PARAM(initial_active_icc_level, ACTVE_ICC_LVL, BYTE);
+UFS_DEVICE_DESC_PARAM(specification_version, SPEC_VER, WORD);
+UFS_DEVICE_DESC_PARAM(manufacturing_date, MANF_DATE, WORD);
+UFS_DEVICE_DESC_PARAM(manufacturer_id, MANF_ID, WORD);
+UFS_DEVICE_DESC_PARAM(rtt_capability, RTT_CAP, BYTE);
+UFS_DEVICE_DESC_PARAM(rtc_update, FRQ_RTC, WORD);
+UFS_DEVICE_DESC_PARAM(ufs_features, UFS_FEAT, BYTE);
+UFS_DEVICE_DESC_PARAM(ffu_timeout, FFU_TMT, BYTE);
+UFS_DEVICE_DESC_PARAM(queue_depth, Q_DPTH, BYTE);
+UFS_DEVICE_DESC_PARAM(device_version, DEV_VER, WORD);
+UFS_DEVICE_DESC_PARAM(number_of_secure_wpa, NUM_SEC_WPA, BYTE);
+UFS_DEVICE_DESC_PARAM(psa_max_data_size, PSA_MAX_DATA, DWORD);
+UFS_DEVICE_DESC_PARAM(psa_state_timeout, PSA_TMT, BYTE);
+
+static struct attribute *ufs_sysfs_device_descriptor[] = {
+ &dev_attr_device_type.attr,
+ &dev_attr_device_class.attr,
+ &dev_attr_device_sub_class.attr,
+ &dev_attr_protocol.attr,
+ &dev_attr_number_of_luns.attr,
+ &dev_attr_number_of_wluns.attr,
+ &dev_attr_boot_enable.attr,
+ &dev_attr_descriptor_access_enable.attr,
+ &dev_attr_initial_power_mode.attr,
+ &dev_attr_high_priority_lun.attr,
+ &dev_attr_secure_removal_type.attr,
+ &dev_attr_support_security_lun.attr,
+ &dev_attr_bkops_termination_latency.attr,
+ &dev_attr_initial_active_icc_level.attr,
+ &dev_attr_specification_version.attr,
+ &dev_attr_manufacturing_date.attr,
+ &dev_attr_manufacturer_id.attr,
+ &dev_attr_rtt_capability.attr,
+ &dev_attr_rtc_update.attr,
+ &dev_attr_ufs_features.attr,
+ &dev_attr_ffu_timeout.attr,
+ &dev_attr_queue_depth.attr,
+ &dev_attr_device_version.attr,
+ &dev_attr_number_of_secure_wpa.attr,
+ &dev_attr_psa_max_data_size.attr,
+ &dev_attr_psa_state_timeout.attr,
+ NULL,
+};
+
+static const struct attribute_group ufs_sysfs_device_descriptor_group = {
+ .name = "device_descriptor",
+ .attrs = ufs_sysfs_device_descriptor,
+};
+
+static const struct attribute_group *ufs_sysfs_groups[] = {
+ &ufs_sysfs_device_descriptor_group,
+ NULL,
+};
+
+void ufs_sysfs_add_device_management(struct ufs_hba *hba)
+{
+ int ret;
+
+ ret = sysfs_create_groups(&hba->dev->kobj, ufs_sysfs_groups);
+ if (ret)
+ dev_err(hba->dev,
+ "%s: sysfs groups creation failed (err = %d)\n",
+ __func__, ret);
+}
+
+void ufs_sysfs_remove_device_management(struct ufs_hba *hba)
+{
+ sysfs_remove_groups(&hba->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..369ba21
--- /dev/null
+++ b/drivers/scsi/ufs/ufs-sysfs.h
@@ -0,0 +1,10 @@
+#ifndef __UFS_SYSFS_H__
+#define __UFS_SYSFS_H__
+
+#include <linux/sysfs.h>
+
+#include "ufshcd.h"
+
+void ufs_sysfs_add_device_management(struct ufs_hba *hba);
+void ufs_sysfs_remove_device_management(struct ufs_hba *hba);
+#endif
diff --git a/drivers/scsi/ufs/ufs.h b/drivers/scsi/ufs/ufs.h
index 54deeb7..6ae1e08 100644
--- a/drivers/scsi/ufs/ufs.h
+++ b/drivers/scsi/ufs/ufs.h
@@ -220,6 +220,14 @@ enum device_desc_param {
DEVICE_DESC_PARAM_UD_LEN = 0x1B,
DEVICE_DESC_PARAM_RTT_CAP = 0x1C,
DEVICE_DESC_PARAM_FRQ_RTC = 0x1D,
+ DEVICE_DESC_PARAM_UFS_FEAT = 0x1F,
+ DEVICE_DESC_PARAM_FFU_TMT = 0x20,
+ DEVICE_DESC_PARAM_Q_DPTH = 0x21,
+ DEVICE_DESC_PARAM_DEV_VER = 0x22,
+ DEVICE_DESC_PARAM_NUM_SEC_WPA = 0x24,
+ DEVICE_DESC_PARAM_PSA_MAX_DATA = 0x25,
+ DEVICE_DESC_PARAM_PSA_TMT = 0x29,
+ DEVICE_DESC_PARAM_PRDCT_REV = 0x2A,
};
/*
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 5bc9dc1..8513d68 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>
@@ -2889,11 +2890,10 @@ static int __ufshcd_query_descriptor(struct ufs_hba *hba,
* The buf_len parameter will contain, on return, the length parameter
* received on the response.
*/
-static int ufshcd_query_descriptor_retry(struct ufs_hba *hba,
- enum query_opcode opcode,
- enum desc_idn idn, u8 index,
- u8 selector,
- u8 *desc_buf, int *buf_len)
+int ufshcd_query_descriptor_retry(struct ufs_hba *hba,
+ enum query_opcode opcode,
+ enum desc_idn idn, u8 index, u8 selector,
+ u8 *desc_buf, int *buf_len)
{
int err;
int retries;
@@ -7697,10 +7697,12 @@ 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);
+ ufs_sysfs_add_device_management(hba);
}
static inline void ufshcd_remove_sysfs_nodes(struct ufs_hba *hba)
{
+ ufs_sysfs_remove_device_management(hba);
device_remove_file(hba->dev, &hba->rpm_lvl_attr);
device_remove_file(hba->dev, &hba->spm_lvl_attr);
}
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index cdc8bd0..80803f8 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -839,6 +839,10 @@ static inline bool ufshcd_is_hs_mode(struct ufs_pa_layer_attr *pwr_info)
}
/* Expose Query-Request API */
+int ufshcd_query_descriptor_retry(struct ufs_hba *hba,
+ enum query_opcode opcode,
+ enum desc_idn idn, u8 index, u8 selector,
+ u8 *desc_buf, int *buf_len);
int ufshcd_query_flag(struct ufs_hba *hba, enum query_opcode opcode,
enum flag_idn idn, bool *flag_res);
int ufshcd_hold(struct ufs_hba *hba, bool async);
--
2.7.4
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