net/mlx5e: Add missing support for PTP_CLK_REQ_PPS request

[ Upstream commit cf503308 ]

Add the missing option to enable the PTP_CLK_PPS function.
In this case pin should be configured as 1PPS IN first and
then it will be connected to PPS mechanism.
Events will be reported as PTP_CLOCK_PPSUSR events to relevant sysfs.

Fixes: ee7f1220 ('net/mlx5e: Implement 1PPS support')
Signed-off-by: Eugenia Emantayev <eugenia@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/net/ethernet/mellanox/mlx5/core/en.h

@@ -266,6 +266,7 @@ struct mlx5e_pps {
 	u8                         pin_caps[MAX_PIN_NUM];
 	struct work_struct         out_work;
 	u64                        start[MAX_PIN_NUM];
+	u8                         enabled;
 };
 
 struct mlx5e_tstamp {

drivers/net/ethernet/mellanox/mlx5/core/en_clock.c

@@ -394,6 +394,17 @@ static int mlx5e_perout_configure(struct ptp_clock_info *ptp,
 			       MLX5E_EVENT_MODE_REPETETIVE & on);
 }
 
+static int mlx5e_pps_configure(struct ptp_clock_info *ptp,
+			       struct ptp_clock_request *rq,
+			       int on)
+{
+	struct mlx5e_tstamp *tstamp =
+		container_of(ptp, struct mlx5e_tstamp, ptp_info);
+
+	tstamp->pps_info.enabled = !!on;
+	return 0;
+}
+
 static int mlx5e_ptp_enable(struct ptp_clock_info *ptp,
 			    struct ptp_clock_request *rq,
 			    int on)
@@ -403,6 +414,8 @@ static int mlx5e_ptp_enable(struct ptp_clock_info *ptp,
 		return mlx5e_extts_configure(ptp, rq, on);
 	case PTP_CLK_REQ_PEROUT:
 		return mlx5e_perout_configure(ptp, rq, on);
+	case PTP_CLK_REQ_PPS:
+		return mlx5e_pps_configure(ptp, rq, on);
 	default:
 		return -EOPNOTSUPP;
 	}
@@ -448,6 +461,7 @@ static int mlx5e_init_pin_config(struct mlx5e_tstamp *tstamp)
 		return -ENOMEM;
 	tstamp->ptp_info.enable = mlx5e_ptp_enable;
 	tstamp->ptp_info.verify = mlx5e_ptp_verify;
+	tstamp->ptp_info.pps = 1;
 
 	for (i = 0; i < tstamp->ptp_info.n_pins; i++) {
 		snprintf(tstamp->ptp_info.pin_config[i].name,
@@ -499,6 +513,12 @@ void mlx5e_pps_event_handler(struct mlx5e_priv *priv,
 
 	switch (tstamp->ptp_info.pin_config[pin].func) {
 	case PTP_PF_EXTTS:
+		if (tstamp->pps_info.enabled) {
+			event->type = PTP_CLOCK_PPSUSR;
+			event->pps_times.ts_real = ns_to_timespec64(event->timestamp);
+		} else {
+			event->type = PTP_CLOCK_EXTTS;
+		}
 		ptp_clock_event(tstamp->ptp, event);
 		break;
 	case PTP_PF_PEROUT:

drivers/net/ethernet/mellanox/mlx5/core/en_main.c

@@ -365,7 +365,6 @@ static void mlx5e_async_event(struct mlx5_core_dev *mdev, void *vpriv,
 		break;
 	case MLX5_DEV_EVENT_PPS:
 		eqe = (struct mlx5_eqe *)param;
-		ptp_event.type = PTP_CLOCK_EXTTS;
 		ptp_event.index = eqe->data.pps.pin;
 		ptp_event.timestamp =
 			timecounter_cyc2time(&priv->tstamp.clock,