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scsi: ufs: Add HCI capabilities sysfs group

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The standard register map of UFSHCI is comprised of several groups.  The
first group (starting from offset 0x00), is the host capabilities group.
It contains some interesting information that otherwise is not available,
e.g. the UFS version of the platform etc.

Reviewed-by: Keoseong Park <keosung.park@samsung.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Bean Huo <beanhuo@micron.com>
Signed-off-by: Avri Altman <avri.altman@wdc.com>
Link: https://lore.kernel.org/r/20240811143757.2538212-3-avri.altman@wdc.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Avri Altman 2024-08-11 17:37:57 +03:00 committed by Martin K. Petersen
parent b9d104465a
commit f51d748195
2 changed files with 80 additions and 0 deletions
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27
Documentation/ABI/testing/sysfs-driver-ufs
View File

@ -1532,3 +1532,30 @@ Contact: Bean Huo <beanhuo@micron.com>
Description:
rtc_update_ms indicates how often the host should synchronize or update the
UFS RTC. If set to 0, this will disable UFS RTC periodic update.
What: /sys/devices/platform/.../ufshci_capabilities/version
Date: August 2024
Contact: Avri Altman <avri.altman@wdc.com>
Description:
Host Capabilities register group: UFS version register.
Symbol - VER. This file shows the UFSHCD version.
Example: Version 3.12 would be represented as 0000_0312h.
The file is read only.
What: /sys/devices/platform/.../ufshci_capabilities/product_id
Date: August 2024
Contact: Avri Altman <avri.altman@wdc.com>
Description:
Host Capabilities register group: product ID register.
Symbol - HCPID. This file shows the UFSHCD product id.
The content of this register is vendor specific.
The file is read only.
What: /sys/devices/platform/.../ufshci_capabilities/man_id
Date: August 2024
Contact: Avri Altman <avri.altman@wdc.com>
Description:
Host Capabilities register group: manufacturer ID register.
Symbol - HCMID. This file shows the UFSHCD manufacturer id.
The Manufacturer ID is defined by JEDEC in JEDEC-JEP106.
The file is read only.

53
drivers/ufs/core/ufs-sysfs.c
View File

@ -525,6 +525,58 @@ static const struct attribute_group ufs_sysfs_capabilities_group = {
.attrs = ufs_sysfs_capabilities_attrs,
};
static ssize_t version_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ufs_hba *hba = dev_get_drvdata(dev);
return sysfs_emit(buf, "0x%x\n", hba->ufs_version);
}
static ssize_t product_id_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
int ret;
u32 val;
struct ufs_hba *hba = dev_get_drvdata(dev);
ret = ufshcd_read_hci_reg(hba, &val, REG_CONTROLLER_PID);
if (ret)
return ret;
return sysfs_emit(buf, "0x%x\n", val);
}
static ssize_t man_id_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
int ret;
u32 val;
struct ufs_hba *hba = dev_get_drvdata(dev);
ret = ufshcd_read_hci_reg(hba, &val, REG_CONTROLLER_MID);
if (ret)
return ret;
return sysfs_emit(buf, "0x%x\n", val);
}
static DEVICE_ATTR_RO(version);
static DEVICE_ATTR_RO(product_id);
static DEVICE_ATTR_RO(man_id);
static struct attribute *ufs_sysfs_ufshci_cap_attrs[] = {
&dev_attr_version.attr,
&dev_attr_product_id.attr,
&dev_attr_man_id.attr,
NULL
};
static const struct attribute_group ufs_sysfs_ufshci_group = {
.name = "ufshci_capabilities",
.attrs = ufs_sysfs_ufshci_cap_attrs,
};
static ssize_t monitor_enable_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
@ -1508,6 +1560,7 @@ static const struct attribute_group ufs_sysfs_attributes_group = {
static const struct attribute_group *ufs_sysfs_groups[] = {
&ufs_sysfs_default_group,
&ufs_sysfs_capabilities_group,
&ufs_sysfs_ufshci_group,
&ufs_sysfs_monitor_group,
&ufs_sysfs_power_info_group,
&ufs_sysfs_device_descriptor_group,