1 files changed, 327 insertions, 104 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c b/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c
index c70c1f0ca0c1..b0e129d0f6d8 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c
@@ -67,39 +67,68 @@ enum {
 	MLX5_MTPPS_FS_ENH_OUT_PER_ADJ		= BIT(0x7),
 };
 
-static u64 mlx5_read_internal_timer(struct mlx5_core_dev *dev,
-				    struct ptp_system_timestamp *sts)
+static bool mlx5_real_time_mode(struct mlx5_core_dev *mdev)
+{
+	return (mlx5_is_real_time_rq(mdev) || mlx5_is_real_time_sq(mdev));
+}
+
+static bool mlx5_modify_mtutc_allowed(struct mlx5_core_dev *mdev)
+{
+	return MLX5_CAP_MCAM_FEATURE(mdev, ptpcyc2realtime_modify);
+}
+
+static int mlx5_set_mtutc(struct mlx5_core_dev *dev, u32 *mtutc, u32 size)
+{
+	u32 out[MLX5_ST_SZ_DW(mtutc_reg)] = {};
+
+	if (!MLX5_CAP_MCAM_REG(dev, mtutc))
+		return -EOPNOTSUPP;
+
+	return mlx5_core_access_reg(dev, mtutc, size, out, sizeof(out),
+				    MLX5_REG_MTUTC, 0, 1);
+}
+
+static u64 mlx5_read_time(struct mlx5_core_dev *dev,
+			  struct ptp_system_timestamp *sts,
+			  bool real_time)
 {
 	u32 timer_h, timer_h1, timer_l;
 
-	timer_h = ioread32be(&dev->iseg->internal_timer_h);
+	timer_h = ioread32be(real_time ? &dev->iseg->real_time_h :
+			     &dev->iseg->internal_timer_h);
 	ptp_read_system_prets(sts);
-	timer_l = ioread32be(&dev->iseg->internal_timer_l);
+	timer_l = ioread32be(real_time ? &dev->iseg->real_time_l :
+			     &dev->iseg->internal_timer_l);
 	ptp_read_system_postts(sts);
-	timer_h1 = ioread32be(&dev->iseg->internal_timer_h);
+	timer_h1 = ioread32be(real_time ? &dev->iseg->real_time_h :
+			      &dev->iseg->internal_timer_h);
 	if (timer_h != timer_h1) {
 		/* wrap around */
 		ptp_read_system_prets(sts);
-		timer_l = ioread32be(&dev->iseg->internal_timer_l);
+		timer_l = ioread32be(real_time ? &dev->iseg->real_time_l :
+				     &dev->iseg->internal_timer_l);
 		ptp_read_system_postts(sts);
 	}
 
-	return (u64)timer_l | (u64)timer_h1 << 32;
+	return real_time ? REAL_TIME_TO_NS(timer_h1, timer_l) :
+			   (u64)timer_l | (u64)timer_h1 << 32;
 }
 
 static u64 read_internal_timer(const struct cyclecounter *cc)
 {
-	struct mlx5_clock *clock = container_of(cc, struct mlx5_clock, cycles);
+	struct mlx5_timer *timer = container_of(cc, struct mlx5_timer, cycles);
+	struct mlx5_clock *clock = container_of(timer, struct mlx5_clock, timer);
 	struct mlx5_core_dev *mdev = container_of(clock, struct mlx5_core_dev,
 						  clock);
 
-	return mlx5_read_internal_timer(mdev, NULL) & cc->mask;
+	return mlx5_read_time(mdev, NULL, false) & cc->mask;
 }
 
 static void mlx5_update_clock_info_page(struct mlx5_core_dev *mdev)
 {
 	struct mlx5_ib_clock_info *clock_info = mdev->clock_info;
 	struct mlx5_clock *clock = &mdev->clock;
+	struct mlx5_timer *timer;
 	u32 sign;
 
 	if (!clock_info)
@@ -109,10 +138,11 @@ static void mlx5_update_clock_info_page(struct mlx5_core_dev *mdev)
 	smp_store_mb(clock_info->sign,
 		     sign | MLX5_IB_CLOCK_INFO_KERNEL_UPDATING);
 
-	clock_info->cycles = clock->tc.cycle_last;
-	clock_info->mult   = clock->cycles.mult;
-	clock_info->nsec   = clock->tc.nsec;
-	clock_info->frac   = clock->tc.frac;
+	timer = &clock->timer;
+	clock_info->cycles = timer->tc.cycle_last;
+	clock_info->mult   = timer->cycles.mult;
+	clock_info->nsec   = timer->tc.nsec;
+	clock_info->frac   = timer->tc.frac;
 
 	smp_store_release(&clock_info->sign,
 			  sign + MLX5_IB_CLOCK_INFO_KERNEL_UPDATING * 2);
@@ -151,92 +181,184 @@ static void mlx5_timestamp_overflow(struct work_struct *work)
 {
 	struct delayed_work *dwork = to_delayed_work(work);
 	struct mlx5_core_dev *mdev;
+	struct mlx5_timer *timer;
 	struct mlx5_clock *clock;
 	unsigned long flags;
 
-	clock = container_of(dwork, struct mlx5_clock, overflow_work);
+	timer = container_of(dwork, struct mlx5_timer, overflow_work);
+	clock = container_of(timer, struct mlx5_clock, timer);
 	mdev = container_of(clock, struct mlx5_core_dev, clock);
+
 	write_seqlock_irqsave(&clock->lock, flags);
-	timecounter_read(&clock->tc);
+	timecounter_read(&timer->tc);
 	mlx5_update_clock_info_page(mdev);
 	write_sequnlock_irqrestore(&clock->lock, flags);
-	schedule_delayed_work(&clock->overflow_work, clock->overflow_period);
+	schedule_delayed_work(&timer->overflow_work, timer->overflow_period);
+}
+
+static int mlx5_ptp_settime_real_time(struct mlx5_core_dev *mdev,
+				      const struct timespec64 *ts)
+{
+	u32 in[MLX5_ST_SZ_DW(mtutc_reg)] = {};
+
+	if (!mlx5_modify_mtutc_allowed(mdev))
+		return 0;
+
+	if (ts->tv_sec < 0 || ts->tv_sec > U32_MAX ||
+	    ts->tv_nsec < 0 || ts->tv_nsec > NSEC_PER_SEC)
+		return -EINVAL;
+
+	MLX5_SET(mtutc_reg, in, operation, MLX5_MTUTC_OPERATION_SET_TIME_IMMEDIATE);
+	MLX5_SET(mtutc_reg, in, utc_sec, ts->tv_sec);
+	MLX5_SET(mtutc_reg, in, utc_nsec, ts->tv_nsec);
+
+	return mlx5_set_mtutc(mdev, in, sizeof(in));
 }
 
 static int mlx5_ptp_settime(struct ptp_clock_info *ptp, const struct timespec64 *ts)
 {
 	struct mlx5_clock *clock = container_of(ptp, struct mlx5_clock, ptp_info);
-	u64 ns = timespec64_to_ns(ts);
+	struct mlx5_timer *timer = &clock->timer;
 	struct mlx5_core_dev *mdev;
 	unsigned long flags;
+	int err;
 
 	mdev = container_of(clock, struct mlx5_core_dev, clock);
+	err = mlx5_ptp_settime_real_time(mdev, ts);
+	if (err)
+		return err;
+
 	write_seqlock_irqsave(&clock->lock, flags);
-	timecounter_init(&clock->tc, &clock->cycles, ns);
+	timecounter_init(&timer->tc, &timer->cycles, timespec64_to_ns(ts));
 	mlx5_update_clock_info_page(mdev);
 	write_sequnlock_irqrestore(&clock->lock, flags);
 
 	return 0;
 }
 
+static
+struct timespec64 mlx5_ptp_gettimex_real_time(struct mlx5_core_dev *mdev,
+					      struct ptp_system_timestamp *sts)
+{
+	struct timespec64 ts;
+	u64 time;
+
+	time = mlx5_read_time(mdev, sts, true);
+	ts = ns_to_timespec64(time);
+	return ts;
+}
+
 static int mlx5_ptp_gettimex(struct ptp_clock_info *ptp, struct timespec64 *ts,
 			     struct ptp_system_timestamp *sts)
 {
 	struct mlx5_clock *clock = container_of(ptp, struct mlx5_clock, ptp_info);
+	struct mlx5_timer *timer = &clock->timer;
 	struct mlx5_core_dev *mdev;
 	unsigned long flags;
 	u64 cycles, ns;
 
 	mdev = container_of(clock, struct mlx5_core_dev, clock);
+	if (mlx5_real_time_mode(mdev)) {
+		*ts = mlx5_ptp_gettimex_real_time(mdev, sts);
+		goto out;
+	}
+
 	write_seqlock_irqsave(&clock->lock, flags);
-	cycles = mlx5_read_internal_timer(mdev, sts);
-	ns = timecounter_cyc2time(&clock->tc, cycles);
+	cycles = mlx5_read_time(mdev, sts, false);
+	ns = timecounter_cyc2time(&timer->tc, cycles);
 	write_sequnlock_irqrestore(&clock->lock, flags);
-
 	*ts = ns_to_timespec64(ns);
-
+out:
 	return 0;
 }
 
+static int mlx5_ptp_adjtime_real_time(struct mlx5_core_dev *mdev, s64 delta)
+{
+	u32 in[MLX5_ST_SZ_DW(mtutc_reg)] = {};
+
+	if (!mlx5_modify_mtutc_allowed(mdev))
+		return 0;
+
+	/* HW time adjustment range is s16. If out of range, settime instead */
+	if (delta < S16_MIN || delta > S16_MAX) {
+		struct timespec64 ts;
+		s64 ns;
+
+		ts = mlx5_ptp_gettimex_real_time(mdev, NULL);
+		ns = timespec64_to_ns(&ts) + delta;
+		ts = ns_to_timespec64(ns);
+		return mlx5_ptp_settime_real_time(mdev, &ts);
+	}
+
+	MLX5_SET(mtutc_reg, in, operation, MLX5_MTUTC_OPERATION_ADJUST_TIME);
+	MLX5_SET(mtutc_reg, in, time_adjustment, delta);
+
+	return mlx5_set_mtutc(mdev, in, sizeof(in));
+}
+
 static int mlx5_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta)
 {
 	struct mlx5_clock *clock = container_of(ptp, struct mlx5_clock, ptp_info);
+	struct mlx5_timer *timer = &clock->timer;
 	struct mlx5_core_dev *mdev;
 	unsigned long flags;
+	int err;
 
 	mdev = container_of(clock, struct mlx5_core_dev, clock);
+
+	err = mlx5_ptp_adjtime_real_time(mdev, delta);
+	if (err)
+		return err;
 	write_seqlock_irqsave(&clock->lock, flags);
-	timecounter_adjtime(&clock->tc, delta);
+	timecounter_adjtime(&timer->tc, delta);
 	mlx5_update_clock_info_page(mdev);
 	write_sequnlock_irqrestore(&clock->lock, flags);
 
 	return 0;
 }
 
+static int mlx5_ptp_adjfreq_real_time(struct mlx5_core_dev *mdev, s32 freq)
+{
+	u32 in[MLX5_ST_SZ_DW(mtutc_reg)] = {};
+
+	if (!mlx5_modify_mtutc_allowed(mdev))
+		return 0;
+
+	MLX5_SET(mtutc_reg, in, operation, MLX5_MTUTC_OPERATION_ADJUST_FREQ_UTC);
+	MLX5_SET(mtutc_reg, in, freq_adjustment, freq);
+
+	return mlx5_set_mtutc(mdev, in, sizeof(in));
+}
+
 static int mlx5_ptp_adjfreq(struct ptp_clock_info *ptp, s32 delta)
 {
 	struct mlx5_clock *clock = container_of(ptp, struct mlx5_clock, ptp_info);
+	struct mlx5_timer *timer = &clock->timer;
 	struct mlx5_core_dev *mdev;
 	unsigned long flags;
 	int neg_adj = 0;
 	u32 diff;
 	u64 adj;
+	int err;
 
+	mdev = container_of(clock, struct mlx5_core_dev, clock);
+	err = mlx5_ptp_adjfreq_real_time(mdev, delta);
+	if (err)
+		return err;
 
 	if (delta < 0) {
 		neg_adj = 1;
 		delta = -delta;
 	}
 
-	adj = clock->nominal_c_mult;
+	adj = timer->nominal_c_mult;
 	adj *= delta;
 	diff = div_u64(adj, 1000000000ULL);
 
-	mdev = container_of(clock, struct mlx5_core_dev, clock);
 	write_seqlock_irqsave(&clock->lock, flags);
-	timecounter_read(&clock->tc);
-	clock->cycles.mult = neg_adj ? clock->nominal_c_mult - diff :
-				       clock->nominal_c_mult + diff;
+	timecounter_read(&timer->tc);
+	timer->cycles.mult = neg_adj ? timer->nominal_c_mult - diff :
+				       timer->nominal_c_mult + diff;
 	mlx5_update_clock_info_page(mdev);
 	write_sequnlock_irqrestore(&clock->lock, flags);
 
@@ -305,6 +427,45 @@ static int mlx5_extts_configure(struct ptp_clock_info *ptp,
 			       MLX5_EVENT_MODE_REPETETIVE & on);
 }
 
+static u64 find_target_cycles(struct mlx5_core_dev *mdev, s64 target_ns)
+{
+	struct mlx5_clock *clock = &mdev->clock;
+	u64 cycles_now, cycles_delta;
+	u64 nsec_now, nsec_delta;
+	struct mlx5_timer *timer;
+	unsigned long flags;
+
+	timer = &clock->timer;
+
+	cycles_now = mlx5_read_time(mdev, NULL, false);
+	write_seqlock_irqsave(&clock->lock, flags);
+	nsec_now = timecounter_cyc2time(&timer->tc, cycles_now);
+	nsec_delta = target_ns - nsec_now;
+	cycles_delta = div64_u64(nsec_delta << timer->cycles.shift,
+				 timer->cycles.mult);
+	write_sequnlock_irqrestore(&clock->lock, flags);
+
+	return cycles_now + cycles_delta;
+}
+
+static u64 perout_conf_internal_timer(struct mlx5_core_dev *mdev,
+				      s64 sec, u32 nsec)
+{
+	struct timespec64 ts;
+	s64 target_ns;
+
+	ts.tv_sec = sec;
+	ts.tv_nsec = nsec;
+	target_ns = timespec64_to_ns(&ts);
+
+	return find_target_cycles(mdev, target_ns);
+}
+
+static u64 perout_conf_real_time(s64 sec, u32 nsec)
+{
+	return (u64)nsec | (u64)sec << 32;
+}
+
 static int mlx5_perout_configure(struct ptp_clock_info *ptp,
 				 struct ptp_clock_request *rq,
 				 int on)
@@ -314,11 +475,9 @@ static int mlx5_perout_configure(struct ptp_clock_info *ptp,
 	struct mlx5_core_dev *mdev =
 			container_of(clock, struct mlx5_core_dev, clock);
 	u32 in[MLX5_ST_SZ_DW(mtpps_reg)] = {0};
-	u64 nsec_now, nsec_delta, time_stamp = 0;
-	u64 cycles_now, cycles_delta;
 	struct timespec64 ts;
-	unsigned long flags;
 	u32 field_select = 0;
+	u64 time_stamp = 0;
 	u8 pin_mode = 0;
 	u8 pattern = 0;
 	int pin = -1;
@@ -335,12 +494,16 @@ static int mlx5_perout_configure(struct ptp_clock_info *ptp,
 	if (rq->perout.index >= clock->ptp_info.n_pins)
 		return -EINVAL;
 
-	pin = ptp_find_pin(clock->ptp, PTP_PF_PEROUT,
-			   rq->perout.index);
-	if (pin < 0)
-		return -EBUSY;
-
+	field_select = MLX5_MTPPS_FS_ENABLE;
 	if (on) {
+		bool rt_mode = mlx5_real_time_mode(mdev);
+		u32 nsec;
+		s64 sec;
+
+		pin = ptp_find_pin(clock->ptp, PTP_PF_PEROUT, rq->perout.index);
+		if (pin < 0)
+			return -EBUSY;
+
 		pin_mode = MLX5_PIN_MODE_OUT;
 		pattern = MLX5_OUT_PATTERN_PERIODIC;
 		ts.tv_sec = rq->perout.period.sec;
@@ -350,23 +513,18 @@ static int mlx5_perout_configure(struct ptp_clock_info *ptp,
 		if ((ns >> 1) != 500000000LL)
 			return -EINVAL;
 
-		ts.tv_sec = rq->perout.start.sec;
-		ts.tv_nsec = rq->perout.start.nsec;
-		ns = timespec64_to_ns(&ts);
-		cycles_now = mlx5_read_internal_timer(mdev, NULL);
-		write_seqlock_irqsave(&clock->lock, flags);
-		nsec_now = timecounter_cyc2time(&clock->tc, cycles_now);
-		nsec_delta = ns - nsec_now;
-		cycles_delta = div64_u64(nsec_delta << clock->cycles.shift,
-					 clock->cycles.mult);
-		write_sequnlock_irqrestore(&clock->lock, flags);
-		time_stamp = cycles_now + cycles_delta;
-		field_select = MLX5_MTPPS_FS_PIN_MODE |
-			       MLX5_MTPPS_FS_PATTERN |
-			       MLX5_MTPPS_FS_ENABLE |
-			       MLX5_MTPPS_FS_TIME_STAMP;
-	} else {
-		field_select = MLX5_MTPPS_FS_ENABLE;
+		nsec = rq->perout.start.nsec;
+		sec = rq->perout.start.sec;
+
+		if (rt_mode && sec > U32_MAX)
+			return -EINVAL;
+
+		time_stamp = rt_mode ? perout_conf_real_time(sec, nsec) :
+				       perout_conf_internal_timer(mdev, sec, nsec);
+
+		field_select |= MLX5_MTPPS_FS_PIN_MODE |
+				MLX5_MTPPS_FS_PATTERN |
+				MLX5_MTPPS_FS_TIME_STAMP;
 	}
 
 	MLX5_SET(mtpps_reg, in, pin, pin);
@@ -537,25 +695,50 @@ static void mlx5_get_pps_caps(struct mlx5_core_dev *mdev)
 	clock->pps_info.pin_caps[7] = MLX5_GET(mtpps_reg, out, cap_pin_7_mode);
 }
 
+static void ts_next_sec(struct timespec64 *ts)
+{
+	ts->tv_sec += 1;
+	ts->tv_nsec = 0;
+}
+
+static u64 perout_conf_next_event_timer(struct mlx5_core_dev *mdev,
+					struct mlx5_clock *clock)
+{
+	bool rt_mode = mlx5_real_time_mode(mdev);
+	struct timespec64 ts;
+	s64 target_ns;
+
+	if (rt_mode)
+		ts = mlx5_ptp_gettimex_real_time(mdev, NULL);
+	else
+		mlx5_ptp_gettimex(&clock->ptp_info, &ts, NULL);
+
+	ts_next_sec(&ts);
+	target_ns = timespec64_to_ns(&ts);
+
+	return rt_mode ? perout_conf_real_time(ts.tv_sec, ts.tv_nsec) :
+			 find_target_cycles(mdev, target_ns);
+}
+
 static int mlx5_pps_event(struct notifier_block *nb,
 			  unsigned long type, void *data)
 {
 	struct mlx5_clock *clock = mlx5_nb_cof(nb, struct mlx5_clock, pps_nb);
 	struct ptp_clock_event ptp_event;
-	u64 cycles_now, cycles_delta;
-	u64 nsec_now, nsec_delta, ns;
 	struct mlx5_eqe *eqe = data;
 	int pin = eqe->data.pps.pin;
 	struct mlx5_core_dev *mdev;
-	struct timespec64 ts;
 	unsigned long flags;
+	u64 ns;
 
 	mdev = container_of(clock, struct mlx5_core_dev, clock);
 
 	switch (clock->ptp_info.pin_config[pin].func) {
 	case PTP_PF_EXTTS:
 		ptp_event.index = pin;
-		ptp_event.timestamp =
+		ptp_event.timestamp = mlx5_real_time_mode(mdev) ?
+			mlx5_real_time_cyc2time(clock,
+						be64_to_cpu(eqe->data.pps.time_stamp)) :
 			mlx5_timecounter_cyc2time(clock,
 						  be64_to_cpu(eqe->data.pps.time_stamp));
 		if (clock->pps_info.enabled) {
@@ -569,17 +752,9 @@ static int mlx5_pps_event(struct notifier_block *nb,
 		ptp_clock_event(clock->ptp, &ptp_event);
 		break;
 	case PTP_PF_PEROUT:
-		mlx5_ptp_gettimex(&clock->ptp_info, &ts, NULL);
-		cycles_now = mlx5_read_internal_timer(mdev, NULL);
-		ts.tv_sec += 1;
-		ts.tv_nsec = 0;
-		ns = timespec64_to_ns(&ts);
+		ns = perout_conf_next_event_timer(mdev, clock);
 		write_seqlock_irqsave(&clock->lock, flags);
-		nsec_now = timecounter_cyc2time(&clock->tc, cycles_now);
-		nsec_delta = ns - nsec_now;
-		cycles_delta = div64_u64(nsec_delta << clock->cycles.shift,
-					 clock->cycles.mult);
-		clock->pps_info.start[pin] = cycles_now + cycles_delta;
+		clock->pps_info.start[pin] = ns;
 		write_sequnlock_irqrestore(&clock->lock, flags);
 		schedule_work(&clock->pps_info.out_work);
 		break;
@@ -591,29 +766,32 @@ static int mlx5_pps_event(struct notifier_block *nb,
 	return NOTIFY_OK;
 }
 
-void mlx5_init_clock(struct mlx5_core_dev *mdev)
+static void mlx5_timecounter_init(struct mlx5_core_dev *mdev)
 {
 	struct mlx5_clock *clock = &mdev->clock;
-	u64 overflow_cycles;
-	u64 ns;
-	u64 frac = 0;
+	struct mlx5_timer *timer = &clock->timer;
 	u32 dev_freq;
 
 	dev_freq = MLX5_CAP_GEN(mdev, device_frequency_khz);
-	if (!dev_freq) {
-		mlx5_core_warn(mdev, "invalid device_frequency_khz, aborting HW clock init\n");
-		return;
-	}
-	seqlock_init(&clock->lock);
-	clock->cycles.read = read_internal_timer;
-	clock->cycles.shift = MLX5_CYCLES_SHIFT;
-	clock->cycles.mult = clocksource_khz2mult(dev_freq,
-						  clock->cycles.shift);
-	clock->nominal_c_mult = clock->cycles.mult;
-	clock->cycles.mask = CLOCKSOURCE_MASK(41);
-
-	timecounter_init(&clock->tc, &clock->cycles,
+	timer->cycles.read = read_internal_timer;
+	timer->cycles.shift = MLX5_CYCLES_SHIFT;
+	timer->cycles.mult = clocksource_khz2mult(dev_freq,
+						  timer->cycles.shift);
+	timer->nominal_c_mult = timer->cycles.mult;
+	timer->cycles.mask = CLOCKSOURCE_MASK(41);
+
+	timecounter_init(&timer->tc, &timer->cycles,
 			 ktime_to_ns(ktime_get_real()));
+}
+
+static void mlx5_init_overflow_period(struct mlx5_clock *clock)
+{
+	struct mlx5_core_dev *mdev = container_of(clock, struct mlx5_core_dev, clock);
+	struct mlx5_ib_clock_info *clock_info = mdev->clock_info;
+	struct mlx5_timer *timer = &clock->timer;
+	u64 overflow_cycles;
+	u64 frac = 0;
+	u64 ns;
 
 	/* Calculate period in seconds to call the overflow watchdog - to make
 	 * sure counter is checked at least twice every wrap around.
@@ -622,32 +800,77 @@ void mlx5_init_clock(struct mlx5_core_dev *mdev)
 	 * multiplied by clock multiplier where the result doesn't exceed
 	 * 64bits.
 	 */
-	overflow_cycles = div64_u64(~0ULL >> 1, clock->cycles.mult);
-	overflow_cycles = min(overflow_cycles, div_u64(clock->cycles.mask, 3));
+	overflow_cycles = div64_u64(~0ULL >> 1, timer->cycles.mult);
+	overflow_cycles = min(overflow_cycles, div_u64(timer->cycles.mask, 3));
 
-	ns = cyclecounter_cyc2ns(&clock->cycles, overflow_cycles,
+	ns = cyclecounter_cyc2ns(&timer->cycles, overflow_cycles,
 				 frac, &frac);
 	do_div(ns, NSEC_PER_SEC / HZ);
-	clock->overflow_period = ns;
+	timer->overflow_period = ns;
 
-	mdev->clock_info =
-		(struct mlx5_ib_clock_info *)get_zeroed_page(GFP_KERNEL);
-	if (mdev->clock_info) {
-		mdev->clock_info->nsec = clock->tc.nsec;
-		mdev->clock_info->cycles = clock->tc.cycle_last;
-		mdev->clock_info->mask = clock->cycles.mask;
-		mdev->clock_info->mult = clock->nominal_c_mult;
-		mdev->clock_info->shift = clock->cycles.shift;
-		mdev->clock_info->frac = clock->tc.frac;
-		mdev->clock_info->overflow_period = clock->overflow_period;
+	INIT_DELAYED_WORK(&timer->overflow_work, mlx5_timestamp_overflow);
+	if (timer->overflow_period)
+		schedule_delayed_work(&timer->overflow_work, 0);
+	else
+		mlx5_core_warn(mdev,
+			       "invalid overflow period, overflow_work is not scheduled\n");
+
+	if (clock_info)
+		clock_info->overflow_period = timer->overflow_period;
+}
+
+static void mlx5_init_clock_info(struct mlx5_core_dev *mdev)
+{
+	struct mlx5_clock *clock = &mdev->clock;
+	struct mlx5_ib_clock_info *info;
+	struct mlx5_timer *timer;
+
+	mdev->clock_info = (struct mlx5_ib_clock_info *)get_zeroed_page(GFP_KERNEL);
+	if (!mdev->clock_info) {
+		mlx5_core_warn(mdev, "Failed to allocate IB clock info page\n");
+		return;
+	}
+
+	info = mdev->clock_info;
+	timer = &clock->timer;
+
+	info->nsec = timer->tc.nsec;
+	info->cycles = timer->tc.cycle_last;
+	info->mask = timer->cycles.mask;
+	info->mult = timer->nominal_c_mult;
+	info->shift = timer->cycles.shift;
+	info->frac = timer->tc.frac;
+}
+
+static void mlx5_init_timer_clock(struct mlx5_core_dev *mdev)
+{
+	struct mlx5_clock *clock = &mdev->clock;
+
+	mlx5_timecounter_init(mdev);
+	mlx5_init_clock_info(mdev);
+	mlx5_init_overflow_period(clock);
+	clock->ptp_info = mlx5_ptp_clock_info;
+
+	if (mlx5_real_time_mode(mdev)) {
+		struct timespec64 ts;
+
+		ktime_get_real_ts64(&ts);
+		mlx5_ptp_settime(&clock->ptp_info, &ts);
+	}
+}
+
+void mlx5_init_clock(struct mlx5_core_dev *mdev)
+{
+	struct mlx5_clock *clock = &mdev->clock;
+
+	if (!MLX5_CAP_GEN(mdev, device_frequency_khz)) {
+		mlx5_core_warn(mdev, "invalid device_frequency_khz, aborting HW clock init\n");
+		return;
 	}
 
+	seqlock_init(&clock->lock);
+	mlx5_init_timer_clock(mdev);
 	INIT_WORK(&clock->pps_info.out_work, mlx5_pps_out);
-	INIT_DELAYED_WORK(&clock->overflow_work, mlx5_timestamp_overflow);
-	if (clock->overflow_period)
-		schedule_delayed_work(&clock->overflow_work, 0);
-	else
-		mlx5_core_warn(mdev, "invalid overflow period, overflow_work is not scheduled\n");
 
 	/* Configure the PHC */
 	clock->ptp_info = mlx5_ptp_clock_info;
@@ -684,7 +907,7 @@ void mlx5_cleanup_clock(struct mlx5_core_dev *mdev)
 	}
 
 	cancel_work_sync(&clock->pps_info.out_work);
-	cancel_delayed_work_sync(&clock->overflow_work);
+	cancel_delayed_work_sync(&clock->timer.overflow_work);
 
 	if (mdev->clock_info) {
 		free_page((unsigned long)mdev->clock_info);