net/mlx5e: clock.c depends on CONFIG_PTP_1588_CLOCK

lib/clock.c includes clock related functions which require ptp support.
Thus compile out lib/clock.c and add the needed function stubs in case
kconfig CONFIG_PTP_1588_CLOCK is off.
Signed-off-by: Moshe Shemesh <moshe@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

drivers/net/ethernet/mellanox/mlx5/core/Makefile

@@ -5,7 +5,7 @@ subdir-ccflags-y += -I$(src)
 mlx5_core-y :=	main.o cmd.o debugfs.o fw.o eq.o uar.o pagealloc.o \
 		health.o mcg.o cq.o srq.o alloc.o qp.o port.o mr.o pd.o \
 		mad.o transobj.o vport.o sriov.o fs_cmd.o fs_core.o \
-		fs_counters.o rl.o lag.o dev.o wq.o lib/gid.o lib/clock.o \
+		fs_counters.o rl.o lag.o dev.o wq.o lib/gid.o  \
 		diag/fs_tracepoint.o diag/fw_tracer.o
 
 mlx5_core-$(CONFIG_MLX5_ACCEL) += accel/ipsec.o accel/tls.o
@@ -15,6 +15,7 @@ mlx5_core-$(CONFIG_MLX5_FPGA) += fpga/cmd.o fpga/core.o fpga/conn.o fpga/sdk.o \
 
 mlx5_core-$(CONFIG_MLX5_MPFS)  += lib/mpfs.o
 mlx5_core-$(CONFIG_VXLAN) += lib/vxlan.o
+mlx5_core-$(CONFIG_PTP_1588_CLOCK) += lib/clock.o
 
 mlx5_core-$(CONFIG_MLX5_CORE_EN) += en_main.o en_common.o en_fs.o en_ethtool.o \
 		en_tx.o en_rx.o en_dim.o en_txrx.o en/xdp.o en_stats.o \

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

@@ -32,6 +32,7 @@
 
 #include "en.h"
 #include "en/port.h"
+#include "lib/clock.h"
 
 void mlx5e_ethtool_get_drvinfo(struct mlx5e_priv *priv,
 			       struct ethtool_drvinfo *drvinfo)
@@ -1106,10 +1107,10 @@ int mlx5e_ethtool_get_ts_info(struct mlx5e_priv *priv,
 	if (ret)
 		return ret;
 
-	info->phc_index = mdev->clock.ptp ?
-			  ptp_clock_index(mdev->clock.ptp) : -1;
+	info->phc_index = mlx5_clock_get_ptp_index(mdev);
 
-	if (!MLX5_CAP_GEN(priv->mdev, device_frequency_khz))
+	if (!MLX5_CAP_GEN(priv->mdev, device_frequency_khz) ||
+	    info->phc_index == -1)
 		return 0;
 
 	info->so_timestamping |= SOF_TIMESTAMPING_TX_HARDWARE |

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

@@ -46,6 +46,7 @@
 #include "accel/ipsec.h"
 #include "accel/tls.h"
 #include "lib/vxlan.h"
+#include "lib/clock.h"
 #include "en/port.h"
 #include "en/xdp.h"
 
@@ -3782,7 +3783,8 @@ int mlx5e_hwstamp_set(struct mlx5e_priv *priv, struct ifreq *ifr)
 	struct hwtstamp_config config;
 	int err;
 
-	if (!MLX5_CAP_GEN(priv->mdev, device_frequency_khz))
+	if (!MLX5_CAP_GEN(priv->mdev, device_frequency_khz) ||
+	    (mlx5_clock_get_ptp_index(priv->mdev) == -1))
 		return -EOPNOTSUPP;
 
 	if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))

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

@@ -40,6 +40,7 @@
 #include "mlx5_core.h"
 #include "fpga/core.h"
 #include "eswitch.h"
+#include "lib/clock.h"
 #include "diag/fw_tracer.h"
 
 enum {

drivers/net/ethernet/mellanox/mlx5/core/lib/clock.h

@@ -33,8 +33,15 @@
 #ifndef __LIB_CLOCK_H__
 #define __LIB_CLOCK_H__
 
+#if IS_ENABLED(CONFIG_PTP_1588_CLOCK)
 void mlx5_init_clock(struct mlx5_core_dev *mdev);
 void mlx5_cleanup_clock(struct mlx5_core_dev *mdev);
+void mlx5_pps_event(struct mlx5_core_dev *dev, struct mlx5_eqe *eqe);
+
+static inline int mlx5_clock_get_ptp_index(struct mlx5_core_dev *mdev)
+{
+	return mdev->clock.ptp ? ptp_clock_index(mdev->clock.ptp) : -1;
+}
 
 static inline ktime_t mlx5_timecounter_cyc2time(struct mlx5_clock *clock,
 						u64 timestamp)
@@ -48,4 +55,21 @@ static inline ktime_t mlx5_timecounter_cyc2time(struct mlx5_clock *clock,
 	return ns_to_ktime(nsec);
 }
 
+#else
+static inline void mlx5_init_clock(struct mlx5_core_dev *mdev) {}
+static inline void mlx5_cleanup_clock(struct mlx5_core_dev *mdev) {}
+static inline void mlx5_pps_event(struct mlx5_core_dev *dev, struct mlx5_eqe *eqe) {}
+
+static inline int mlx5_clock_get_ptp_index(struct mlx5_core_dev *mdev)
+{
+	return -1;
+}
+
+static inline ktime_t mlx5_timecounter_cyc2time(struct mlx5_clock *clock,
+						u64 timestamp)
+{
+	return 0;
+}
+#endif
+
 #endif

drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h

@@ -99,7 +99,6 @@ void mlx5_core_event(struct mlx5_core_dev *dev, enum mlx5_dev_event event,
 		     unsigned long param);
 void mlx5_core_page_fault(struct mlx5_core_dev *dev,
 			  struct mlx5_pagefault *pfault);
-void mlx5_pps_event(struct mlx5_core_dev *dev, struct mlx5_eqe *eqe);
 void mlx5_port_module_event(struct mlx5_core_dev *dev, struct mlx5_eqe *eqe);
 void mlx5_enter_error_state(struct mlx5_core_dev *dev, bool force);
 void mlx5_disable_device(struct mlx5_core_dev *dev);