@@ -99,6 +99,9 @@
/* Polling time to wait for fDeviceInit */
#define FDEVICEINIT_COMPL_TIMEOUT 1500 /* millisecs */
+/* Default RTC update every 10 seconds */
+#define UFS_RTC_UPDATE_INTERVAL_MS (10 * MSEC_PER_SEC)
+
/* UFSHC 4.0 compliant HC support this mode. */
static bool use_mcq_mode = true;
@@ -684,6 +687,8 @@ static void ufshcd_device_reset(struct ufs_hba *hba)
hba->dev_info.wb_enabled = false;
hba->dev_info.wb_buf_flush_enabled = false;
}
+ if (hba->dev_info.rtc_type == UFS_RTC_RELATIVE)
+ hba->dev_info.rtc_time_baseline = 0;
}
if (err != -EOPNOTSUPP)
ufshcd_update_evt_hist(hba, UFS_EVT_DEV_RESET, err);
@@ -8191,6 +8196,77 @@ static void ufs_fixup_device_setup(struct ufs_hba *hba)
ufshcd_vops_fixup_dev_quirks(hba);
}
+static void ufshcd_update_rtc(struct ufs_hba *hba)
+{
+ int err;
+ u32 val;
+ struct timespec64 ts64;
+
+ ktime_get_real_ts64(&ts64);
+
+ if (ts64.tv_sec < hba->dev_info.rtc_time_baseline) {
+ dev_warn(hba->dev, "%s: Current time precedes previous setting!\n", __func__);
+ return;
+ }
+ /*
+ * Absolute RTC mode has 136-year limit as of 2010. Modify UFS Spec or choosing relative
+ * RTC mode for longer (beyond year 2146) time spans.
+ */
+ val = ts64.tv_sec - hba->dev_info.rtc_time_baseline;
+
+ ufshcd_rpm_get_sync(hba);
+ err = ufshcd_query_attr(hba, UPIU_QUERY_OPCODE_WRITE_ATTR, QUERY_ATTR_IDN_SECONDS_PASSED,
+ 0, 0, &val);
+ ufshcd_rpm_put_sync(hba);
+
+ if (err)
+ dev_err(hba->dev, "%s: Failed to update rtc %d\n", __func__, err);
+ else if (hba->dev_info.rtc_type == UFS_RTC_RELATIVE)
+ hba->dev_info.rtc_time_baseline = ts64.tv_sec;
+}
+
+static void ufshcd_rtc_work(struct work_struct *work)
+{
+ struct ufs_hba *hba;
+ bool is_busy;
+
+ hba = container_of(to_delayed_work(work), struct ufs_hba, ufs_rtc_update_work);
+
+ is_busy = ufshcd_is_ufs_dev_busy(hba);
+ /*
+ * RTC updates should not interfere with normal IO requests; we should only update the RTC
+ * when there are no ongoing requests.
+ */
+ if (!is_busy)
+ ufshcd_update_rtc(hba);
+
+ if (ufshcd_is_ufs_dev_active(hba))
+ schedule_delayed_work(&hba->ufs_rtc_update_work,
+ msecs_to_jiffies(UFS_RTC_UPDATE_INTERVAL_MS));
+}
+
+static void ufs_init_rtc(struct ufs_hba *hba, u8 *desc_buf)
+{
+ struct ufs_dev_info *dev_info = &hba->dev_info;
+ u16 periodic_rtc_update = get_unaligned_be16(&desc_buf[DEVICE_DESC_PARAM_FRQ_RTC]);
+
+ if (periodic_rtc_update & UFS_RTC_TIME_BASELINE) {
+ dev_info->rtc_type = UFS_RTC_ABSOLUTE;
+ /*
+ * The concept of measuring time in Linux as the number of seconds elapsed since
+ * 00:00:00 UTC on January 1, 1970, and UFS ABS RTC is elapsed from January 1st
+ * 2010 00:00, here we need to adjust ABS baseline.
+ */
+ dev_info->rtc_time_baseline = mktime64(2010, 1, 1, 0, 0, 0) -
+ mktime64(1970, 1, 1, 0, 0, 0);
+ } else {
+ dev_info->rtc_type = UFS_RTC_RELATIVE;
+ dev_info->rtc_time_baseline = 0;
+ }
+
+ INIT_DELAYED_WORK(&hba->ufs_rtc_update_work, ufshcd_rtc_work);
+}
+
static int ufs_get_device_desc(struct ufs_hba *hba)
{
int err;
@@ -8243,6 +8319,8 @@ static int ufs_get_device_desc(struct ufs_hba *hba)
ufshcd_temp_notif_probe(hba, desc_buf);
+ ufs_init_rtc(hba, desc_buf);
+
if (hba->ext_iid_sup)
ufshcd_ext_iid_probe(hba, desc_buf);
@@ -8796,6 +8874,8 @@ static int ufshcd_device_init(struct ufs_hba *hba, bool init_dev_params)
ufshcd_force_reset_auto_bkops(hba);
ufshcd_set_timestamp_attr(hba);
+ schedule_delayed_work(&hba->ufs_rtc_update_work,
+ msecs_to_jiffies(UFS_RTC_UPDATE_INTERVAL_MS));
/* Gear up to HS gear if supported */
if (hba->max_pwr_info.is_valid) {
@@ -9753,6 +9833,8 @@ static int __ufshcd_wl_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op)
ret = ufshcd_vops_suspend(hba, pm_op, POST_CHANGE);
if (ret)
goto set_link_active;
+
+ cancel_delayed_work_sync(&hba->ufs_rtc_update_work);
goto out;
set_link_active:
@@ -9847,6 +9929,8 @@ static int __ufshcd_wl_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op)
if (ret)
goto set_old_link_state;
ufshcd_set_timestamp_attr(hba);
+ schedule_delayed_work(&hba->ufs_rtc_update_work,
+ msecs_to_jiffies(UFS_RTC_UPDATE_INTERVAL_MS));
}
if (ufshcd_keep_autobkops_enabled_except_suspend(hba))
@@ -14,6 +14,7 @@
#include <linux/bitops.h>
#include <linux/types.h>
#include <uapi/scsi/scsi_bsg_ufs.h>
+#include <linux/time64.h>
/*
* Using static_assert() is not allowed in UAPI header files. Hence the check
@@ -551,6 +552,15 @@ struct ufs_vreg_info {
struct ufs_vreg *vdd_hba;
};
+/*
+ * UFS device descriptor wPeriodicRTCUpdate bit9 defines RTC time baseline.
+ */
+#define UFS_RTC_TIME_BASELINE BIT(9)
+enum ufs_rtc_time {
+ UFS_RTC_RELATIVE,
+ UFS_RTC_ABSOLUTE
+};
+
struct ufs_dev_info {
bool f_power_on_wp_en;
/* Keeps information if any of the LU is power on write protected */
@@ -578,6 +588,10 @@ struct ufs_dev_info {
/* UFS EXT_IID Enable */
bool b_ext_iid_en;
+
+ /* UFS RTC */
+ enum ufs_rtc_time rtc_type;
+ time64_t rtc_time_baseline;
};
/*
@@ -912,6 +912,8 @@ enum ufshcd_mcq_opr {
* @mcq_base: Multi circular queue registers base address
* @uhq: array of supported hardware queues
* @dev_cmd_queue: Queue for issuing device management commands
+ * @mcq_opr: MCQ operation and runtime registers
+ * @ufs_rtc_update_work: A work for UFS RTC periodic update
*/
struct ufs_hba {
void __iomem *mmio_base;
@@ -1076,6 +1078,8 @@ struct ufs_hba {
struct ufs_hw_queue *uhq;
struct ufs_hw_queue *dev_cmd_queue;
struct ufshcd_mcq_opr_info_t mcq_opr[OPR_MAX];
+
+ struct delayed_work ufs_rtc_update_work;
};
/**