net/mlx5: Verify Hardware supports requested ptp function on a given pin

Fix a bug where driver did not verify Hardware pin capabilities for
PTP functions.

Fixes: ee7f12205abc ("net/mlx5e: Implement 1PPS support")
Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Reviewed-by: Ariel Levkovich <lariel@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c b/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c
index c6967e1..284806e 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c
@@ -408,10 +408,31 @@ static int mlx5_ptp_enable(struct ptp_clock_info *ptp,
        return 0;
 }
 
+enum {
+       MLX5_MTPPS_REG_CAP_PIN_X_MODE_SUPPORT_PPS_IN = BIT(0),
+       MLX5_MTPPS_REG_CAP_PIN_X_MODE_SUPPORT_PPS_OUT = BIT(1),
+};
+
 static int mlx5_ptp_verify(struct ptp_clock_info *ptp, unsigned int pin,
                           enum ptp_pin_function func, unsigned int chan)
 {
-       return (func == PTP_PF_PHYSYNC) ? -EOPNOTSUPP : 0;
+       struct mlx5_clock *clock = container_of(ptp, struct mlx5_clock,
+                                               ptp_info);
+
+       switch (func) {
+       case PTP_PF_NONE:
+               return 0;
+       case PTP_PF_EXTTS:
+               return !(clock->pps_info.pin_caps[pin] &
+                        MLX5_MTPPS_REG_CAP_PIN_X_MODE_SUPPORT_PPS_IN);
+       case PTP_PF_PEROUT:
+               return !(clock->pps_info.pin_caps[pin] &
+                        MLX5_MTPPS_REG_CAP_PIN_X_MODE_SUPPORT_PPS_OUT);
+       default:
+               return -EOPNOTSUPP;
+       }
+
+       return -EOPNOTSUPP;
 }
 
 static const struct ptp_clock_info mlx5_ptp_clock_info = {