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author | Stanislav Nijnikov <stanislav.nijnikov@wdc.com> | 2018-02-15 14:14:02 +0200 |
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committer | Martin K. Petersen <martin.petersen@oracle.com> | 2018-02-15 18:34:24 -0500 |
commit | 45bced87e79316ecd868aee8f187284025792c5f (patch) | |
tree | aafe9cbaa6ef3fe3b44175722913e48f36e97cd0 /drivers/scsi/ufs/ufs-sysfs.c | |
parent | cbb6813ee771abc17a713432f31820581eafd4ae (diff) | |
download | linux-45bced87e79316ecd868aee8f187284025792c5f.tar.bz2 |
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.c | 116 |
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, }; |