diff options
Diffstat (limited to 'drivers/ufs/core/ufs-sysfs.c')
| -rw-r--r-- | drivers/ufs/core/ufs-sysfs.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/drivers/ufs/core/ufs-sysfs.c b/drivers/ufs/core/ufs-sysfs.c index 7f41f2a69b04..e4ddea6ea780 100644 --- a/drivers/ufs/core/ufs-sysfs.c +++ b/drivers/ufs/core/ufs-sysfs.c @@ -255,6 +255,50 @@ out: return res < 0 ? res : count; } +static ssize_t enable_wb_buf_flush_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct ufs_hba *hba = dev_get_drvdata(dev); + + return sysfs_emit(buf, "%d\n", hba->dev_info.wb_buf_flush_enabled); +} + +static ssize_t enable_wb_buf_flush_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct ufs_hba *hba = dev_get_drvdata(dev); + unsigned int enable_wb_buf_flush; + ssize_t res; + + if (!ufshcd_is_wb_allowed(hba) || + (hba->quirks & UFSHCI_QUIRK_SKIP_MANUAL_WB_FLUSH_CTRL)) { + dev_warn(dev, "It is not allowed to configure WB buf flushing!\n"); + return -EOPNOTSUPP; + } + + if (kstrtouint(buf, 0, &enable_wb_buf_flush)) + return -EINVAL; + + if (enable_wb_buf_flush != 0 && enable_wb_buf_flush != 1) + return -EINVAL; + + down(&hba->host_sem); + if (!ufshcd_is_user_access_allowed(hba)) { + res = -EBUSY; + goto out; + } + + ufshcd_rpm_get_sync(hba); + res = ufshcd_wb_toggle_buf_flush(hba, enable_wb_buf_flush); + ufshcd_rpm_put_sync(hba); + +out: + up(&hba->host_sem); + return res < 0 ? res : count; +} + static DEVICE_ATTR_RW(rpm_lvl); static DEVICE_ATTR_RO(rpm_target_dev_state); static DEVICE_ATTR_RO(rpm_target_link_state); @@ -263,6 +307,7 @@ static DEVICE_ATTR_RO(spm_target_dev_state); static DEVICE_ATTR_RO(spm_target_link_state); static DEVICE_ATTR_RW(auto_hibern8); static DEVICE_ATTR_RW(wb_on); +static DEVICE_ATTR_RW(enable_wb_buf_flush); static struct attribute *ufs_sysfs_ufshcd_attrs[] = { &dev_attr_rpm_lvl.attr, @@ -273,6 +318,7 @@ static struct attribute *ufs_sysfs_ufshcd_attrs[] = { &dev_attr_spm_target_link_state.attr, &dev_attr_auto_hibern8.attr, &dev_attr_wb_on.attr, + &dev_attr_enable_wb_buf_flush.attr, NULL }; |