@@ -1559,3 +1559,55 @@ Description:
Symbol - HCMID. This file shows the UFSHCD manufacturer id.
The Manufacturer ID is defined by JEDEC in JEDEC-JEP106.
The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/wb_toggle_buf_resize
+What: /sys/bus/platform/devices/*.ufs/wb_toggle_buf_resize
+Date: Qct 2024
+Contact: Huan Tang <tanghuan@vivo.com>
+Description:
+ The host can decrease or increase the WriteBooster Buffer size by setting
+ this file.
+
+ ====== ======================================
+ 00h Idle (There is no resize operation)
+ 01h Decrease WriteBooster Buffer Size
+ 02h Increase WriteBooster Buffer Size
+ Others Reserved
+ ====== ======================================
+
+ The file is write only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/attributes/wb_buf_resize_hint
+What: /sys/bus/platform/devices/*.ufs/attributes/wb_buf_resize_hint
+Date: Qct 2024
+Contact: Huan Tang <tanghuan@vivo.com>
+Description:
+ wb_buf_resize_hint indicates hint information about which type of resize for
+ WriteBooster Buffer is recommended by the device.
+
+ ====== ======================================
+ 00h Recommend keep the buffer size
+ 01h Recommend to decrease the buffer size
+ 02h Recommend to increase the buffer size
+ Others: Reserved
+ ====== ======================================
+
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/attributes/wb_buf_resize_status
+What: /sys/bus/platform/devices/*.ufs/attributes/wb_buf_resize_status
+Date: Qct 2024
+Contact: Huan Tang <tanghuan@vivo.com>
+Description:
+ The host can check the Resize operation status of the WriteBooster Buffer
+ by reading this file.
+
+ ====== ========================================
+ 00h Idle (resize operation is not issued)
+ 01h Resize operation in progress
+ 02h Resize operation completed successfully
+ 03h Resize operation general failure
+ Others Reserved
+ ====== ========================================
+
+ The file is read only.
@@ -411,6 +411,44 @@ static ssize_t wb_flush_threshold_store(struct device *dev,
return count;
}
+static ssize_t wb_toggle_buf_resize_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct ufs_hba *hba = dev_get_drvdata(dev);
+ unsigned int wb_buf_resize_op;
+ u8 index;
+ ssize_t res;
+
+ if (!ufshcd_is_wb_allowed(hba) || !hba->dev_info.wb_enabled ||
+ !hba->dev_info.b_presrv_uspc_en) {
+ dev_err(dev, "The WB buf resize is not allowed!\n");
+ return -EOPNOTSUPP;
+ }
+
+ if (kstrtouint(buf, 0, &wb_buf_resize_op))
+ return -EINVAL;
+
+ if (wb_buf_resize_op != 0x01 && wb_buf_resize_op != 0x02) {
+ dev_err(dev, "The operation %u is invalid!\n", wb_buf_resize_op);
+ return -EINVAL;
+ }
+
+ down(&hba->host_sem);
+ if (!ufshcd_is_user_access_allowed(hba)) {
+ res = -EBUSY;
+ goto out;
+ }
+
+ index = ufshcd_wb_get_query_index(hba);
+ ufshcd_rpm_get_sync(hba);
+ res = ufshcd_wb_toggle_buf_resize(hba, wb_buf_resize_op);
+ ufshcd_rpm_put_sync(hba);
+
+out:
+ up(&hba->host_sem);
+ return res < 0 ? res : count;
+}
+
/**
* pm_qos_enable_show - sysfs handler to show pm qos enable value
* @dev: device associated with the UFS controller
@@ -468,6 +506,7 @@ static DEVICE_ATTR_RW(auto_hibern8);
static DEVICE_ATTR_RW(wb_on);
static DEVICE_ATTR_RW(enable_wb_buf_flush);
static DEVICE_ATTR_RW(wb_flush_threshold);
+static DEVICE_ATTR_WO(wb_toggle_buf_resize);
static DEVICE_ATTR_RW(rtc_update_ms);
static DEVICE_ATTR_RW(pm_qos_enable);
@@ -482,6 +521,7 @@ static struct attribute *ufs_sysfs_ufshcd_attrs[] = {
&dev_attr_wb_on.attr,
&dev_attr_enable_wb_buf_flush.attr,
&dev_attr_wb_flush_threshold.attr,
+ &dev_attr_wb_toggle_buf_resize.attr,
&dev_attr_rtc_update_ms.attr,
&dev_attr_pm_qos_enable.attr,
NULL
@@ -1526,6 +1566,8 @@ UFS_ATTRIBUTE(wb_flush_status, _WB_FLUSH_STATUS);
UFS_ATTRIBUTE(wb_avail_buf, _AVAIL_WB_BUFF_SIZE);
UFS_ATTRIBUTE(wb_life_time_est, _WB_BUFF_LIFE_TIME_EST);
UFS_ATTRIBUTE(wb_cur_buf, _CURR_WB_BUFF_SIZE);
+UFS_ATTRIBUTE(wb_buf_resize_hint, _WB_BUF_RESIZE_HINT);
+UFS_ATTRIBUTE(wb_buf_resize_status, _WB_BUF_RESIZE_STATUS);
static struct attribute *ufs_sysfs_attributes[] = {
@@ -1549,6 +1591,8 @@ static struct attribute *ufs_sysfs_attributes[] = {
&dev_attr_wb_avail_buf.attr,
&dev_attr_wb_life_time_est.attr,
&dev_attr_wb_cur_buf.attr,
+ &dev_attr_wb_buf_resize_hint.attr,
+ &dev_attr_wb_buf_resize_status.attr,
NULL,
};
@@ -6167,6 +6167,21 @@ static bool ufshcd_wb_need_flush(struct ufs_hba *hba)
return ufshcd_wb_presrv_usrspc_keep_vcc_on(hba, avail_buf);
}
+int ufshcd_wb_toggle_buf_resize(struct ufs_hba *hba, u32 op)
+{
+ int ret;
+ u8 index;
+
+ index = ufshcd_wb_get_query_index(hba);
+ ret = ufshcd_query_attr_retry(hba, UPIU_QUERY_OPCODE_WRITE_ATTR,
+ QUERY_ATTR_IDN_WB_BUF_RESIZE_EN, index, 0, &op);
+ if (ret)
+ dev_err(hba->dev, "%s: Enable WB buf resize operation failed %d\n",
+ __func__, ret);
+
+ return ret;
+}
+
static void ufshcd_rpm_dev_flush_recheck_work(struct work_struct *work)
{
struct ufs_hba *hba = container_of(to_delayed_work(work),
@@ -181,7 +181,10 @@ enum attr_idn {
QUERY_ATTR_IDN_WB_BUFF_LIFE_TIME_EST = 0x1E,
QUERY_ATTR_IDN_CURR_WB_BUFF_SIZE = 0x1F,
QUERY_ATTR_IDN_EXT_IID_EN = 0x2A,
- QUERY_ATTR_IDN_TIMESTAMP = 0x30
+ QUERY_ATTR_IDN_TIMESTAMP = 0x30,
+ QUERY_ATTR_IDN_WB_BUF_RESIZE_HINT = 0x3C,
+ QUERY_ATTR_IDN_WB_BUF_RESIZE_EN = 0x3D,
+ QUERY_ATTR_IDN_WB_BUF_RESIZE_STATUS = 0x3E,
};
/* Descriptor idn for Query requests */
@@ -1454,6 +1454,7 @@ int ufshcd_advanced_rpmb_req_handler(struct ufs_hba *hba, struct utp_upiu_req *r
struct scatterlist *sg_list, enum dma_data_direction dir);
int ufshcd_wb_toggle(struct ufs_hba *hba, bool enable);
int ufshcd_wb_toggle_buf_flush(struct ufs_hba *hba, bool enable);
+int ufshcd_wb_toggle_buf_resize(struct ufs_hba *hba, u32 op);
int ufshcd_suspend_prepare(struct device *dev);
int __ufshcd_suspend_prepare(struct device *dev, bool rpm_ok_for_spm);
void ufshcd_resume_complete(struct device *dev);