/*
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* Copyright (c) 2017, Mellanox Technologies, Ltd. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef __LIB_CLOCK_H__
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#define __LIB_CLOCK_H__
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#if IS_ENABLED(CONFIG_PTP_1588_CLOCK)
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void mlx5_init_clock(struct mlx5_core_dev *mdev);
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void mlx5_cleanup_clock(struct mlx5_core_dev *mdev);
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static inline int mlx5_clock_get_ptp_index(struct mlx5_core_dev *mdev)
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{
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return mdev->clock.ptp ? ptp_clock_index(mdev->clock.ptp) : -1;
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}
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static inline ktime_t mlx5_timecounter_cyc2time(struct mlx5_clock *clock,
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u64 timestamp)
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{
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struct mlx5_timer *timer = &clock->timer;
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unsigned int seq;
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u64 nsec;
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do {
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seq = read_seqbegin(&clock->lock);
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nsec = timecounter_cyc2time(&timer->tc, timestamp);
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} while (read_seqretry(&clock->lock, seq));
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return ns_to_ktime(nsec);
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}
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#else
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static inline void mlx5_init_clock(struct mlx5_core_dev *mdev) {}
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static inline void mlx5_cleanup_clock(struct mlx5_core_dev *mdev) {}
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static inline int mlx5_clock_get_ptp_index(struct mlx5_core_dev *mdev)
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{
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return -1;
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}
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static inline ktime_t mlx5_timecounter_cyc2time(struct mlx5_clock *clock,
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u64 timestamp)
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{
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return 0;
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}
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#endif
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#endif
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