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authorStanislav Nijnikov2018-02-15 14:14:02 +0200
committerMartin K. Petersen2018-02-15 18:34:24 -0500
commit45bced87e79316ecd868aee8f187284025792c5f (patch)
treeaafe9cbaa6ef3fe3b44175722913e48f36e97cd0 /drivers/scsi/ufs/ufs-sysfs.c
parentcbb6813ee771abc17a713432f31820581eafd4ae (diff)
scsi: ufs: sysfs: device descriptor
This patch introduces a sysfs group entry for the UFS device descriptor parameters. The group adds "device_descriptor" folder under the UFS driver sysfs entry (/sys/bus/platform/drivers/ufshcd/*). The parameters are shown as hexadecimal numbers. The full information about the parameters 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>
Diffstat (limited to 'drivers/scsi/ufs/ufs-sysfs.c')
-rw-r--r--drivers/scsi/ufs/ufs-sysfs.c116
1 files changed, 116 insertions, 0 deletions
diff --git a/drivers/scsi/ufs/ufs-sysfs.c b/drivers/scsi/ufs/ufs-sysfs.c
index 77624d0adee6..440b94e453bf 100644
--- a/drivers/scsi/ufs/ufs-sysfs.c
+++ b/drivers/scsi/ufs/ufs-sysfs.c
@@ -3,7 +3,9 @@
#include <linux/err.h>
#include <linux/string.h>
+#include <asm/unaligned.h>
+#include "ufs.h"
#include "ufs-sysfs.h"
static const char *ufschd_uic_link_state_to_string(
@@ -134,8 +136,122 @@ static const struct attribute_group ufs_sysfs_default_group = {
.attrs = ufs_sysfs_ufshcd_attrs,
};
+static ssize_t ufs_sysfs_read_desc_param(struct ufs_hba *hba,
+ enum desc_idn desc_id,
+ u8 desc_index,
+ u8 param_offset,
+ u8 *sysfs_buf,
+ u8 param_size)
+{
+ u8 desc_buf[8] = {0};
+ int ret;
+
+ if (param_size > 8)
+ return -EINVAL;
+
+ ret = ufshcd_read_desc_param(hba, desc_id, desc_index,
+ param_offset, desc_buf, param_size);
+ if (ret)
+ return -EINVAL;
+ switch (param_size) {
+ case 1:
+ ret = sprintf(sysfs_buf, "0x%02X\n", *desc_buf);
+ break;
+ case 2:
+ ret = sprintf(sysfs_buf, "0x%04X\n",
+ get_unaligned_be16(desc_buf));
+ break;
+ case 4:
+ ret = sprintf(sysfs_buf, "0x%08X\n",
+ get_unaligned_be32(desc_buf));
+ break;
+ case 8:
+ ret = sprintf(sysfs_buf, "0x%016llX\n",
+ get_unaligned_be64(desc_buf));
+ break;
+ }
+
+ return ret;
+}
+
+#define UFS_DESC_PARAM(_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, _duname##_DESC_PARAM##_puname, buf, _size); \
+} \
+static DEVICE_ATTR_RO(_name)
+
+#define UFS_DEVICE_DESC_PARAM(_name, _uname, _size) \
+ UFS_DESC_PARAM(_name, _uname, DEVICE, _size)
+
+UFS_DEVICE_DESC_PARAM(device_type, _DEVICE_TYPE, 1);
+UFS_DEVICE_DESC_PARAM(device_class, _DEVICE_CLASS, 1);
+UFS_DEVICE_DESC_PARAM(device_sub_class, _DEVICE_SUB_CLASS, 1);
+UFS_DEVICE_DESC_PARAM(protocol, _PRTCL, 1);
+UFS_DEVICE_DESC_PARAM(number_of_luns, _NUM_LU, 1);
+UFS_DEVICE_DESC_PARAM(number_of_wluns, _NUM_WLU, 1);
+UFS_DEVICE_DESC_PARAM(boot_enable, _BOOT_ENBL, 1);
+UFS_DEVICE_DESC_PARAM(descriptor_access_enable, _DESC_ACCSS_ENBL, 1);
+UFS_DEVICE_DESC_PARAM(initial_power_mode, _INIT_PWR_MODE, 1);
+UFS_DEVICE_DESC_PARAM(high_priority_lun, _HIGH_PR_LUN, 1);
+UFS_DEVICE_DESC_PARAM(secure_removal_type, _SEC_RMV_TYPE, 1);
+UFS_DEVICE_DESC_PARAM(support_security_lun, _SEC_LU, 1);
+UFS_DEVICE_DESC_PARAM(bkops_termination_latency, _BKOP_TERM_LT, 1);
+UFS_DEVICE_DESC_PARAM(initial_active_icc_level, _ACTVE_ICC_LVL, 1);
+UFS_DEVICE_DESC_PARAM(specification_version, _SPEC_VER, 2);
+UFS_DEVICE_DESC_PARAM(manufacturing_date, _MANF_DATE, 2);
+UFS_DEVICE_DESC_PARAM(manufacturer_id, _MANF_ID, 2);
+UFS_DEVICE_DESC_PARAM(rtt_capability, _RTT_CAP, 1);
+UFS_DEVICE_DESC_PARAM(rtc_update, _FRQ_RTC, 2);
+UFS_DEVICE_DESC_PARAM(ufs_features, _UFS_FEAT, 1);
+UFS_DEVICE_DESC_PARAM(ffu_timeout, _FFU_TMT, 1);
+UFS_DEVICE_DESC_PARAM(queue_depth, _Q_DPTH, 1);
+UFS_DEVICE_DESC_PARAM(device_version, _DEV_VER, 2);
+UFS_DEVICE_DESC_PARAM(number_of_secure_wpa, _NUM_SEC_WPA, 1);
+UFS_DEVICE_DESC_PARAM(psa_max_data_size, _PSA_MAX_DATA, 4);
+UFS_DEVICE_DESC_PARAM(psa_state_timeout, _PSA_TMT, 1);
+
+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_default_group,
+ &ufs_sysfs_device_descriptor_group,
NULL,
};