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

   1/*
   2 * Copyright (c) 2017, Mellanox Technologies, Ltd.  All rights reserved.
   3 *
   4 * This software is available to you under a choice of one of two
   5 * licenses.  You may choose to be licensed under the terms of the GNU
   6 * General Public License (GPL) Version 2, available from the file
   7 * COPYING in the main directory of this source tree, or the
   8 * OpenIB.org BSD license below:
   9 *
  10 *     Redistribution and use in source and binary forms, with or
  11 *     without modification, are permitted provided that the following
  12 *     conditions are met:
  13 *
  14 *      - Redistributions of source code must retain the above
  15 *        copyright notice, this list of conditions and the following
  16 *        disclaimer.
  17 *
  18 *      - Redistributions in binary form must reproduce the above
  19 *        copyright notice, this list of conditions and the following
  20 *        disclaimer in the documentation and/or other materials
  21 *        provided with the distribution.
  22 *
  23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30 * SOFTWARE.
  31 */
  32
  33#ifndef __LIB_CLOCK_H__
  34#define __LIB_CLOCK_H__
  35
  36#if IS_ENABLED(CONFIG_PTP_1588_CLOCK)
  37void mlx5_init_clock(struct mlx5_core_dev *mdev);
  38void mlx5_cleanup_clock(struct mlx5_core_dev *mdev);
  39void mlx5_pps_event(struct mlx5_core_dev *dev, struct mlx5_eqe *eqe);
  40
  41static inline int mlx5_clock_get_ptp_index(struct mlx5_core_dev *mdev)
  42{
  43        return mdev->clock.ptp ? ptp_clock_index(mdev->clock.ptp) : -1;
  44}
  45
  46static inline ktime_t mlx5_timecounter_cyc2time(struct mlx5_clock *clock,
  47                                                u64 timestamp)
  48{
  49        u64 nsec;
  50
  51        read_lock(&clock->lock);
  52        nsec = timecounter_cyc2time(&clock->tc, timestamp);
  53        read_unlock(&clock->lock);
  54
  55        return ns_to_ktime(nsec);
  56}
  57
  58#else
  59static inline void mlx5_init_clock(struct mlx5_core_dev *mdev) {}
  60static inline void mlx5_cleanup_clock(struct mlx5_core_dev *mdev) {}
  61static inline void mlx5_pps_event(struct mlx5_core_dev *dev, struct mlx5_eqe *eqe) {}
  62
  63static inline int mlx5_clock_get_ptp_index(struct mlx5_core_dev *mdev)
  64{
  65        return -1;
  66}
  67
  68static inline ktime_t mlx5_timecounter_cyc2time(struct mlx5_clock *clock,
  69                                                u64 timestamp)
  70{
  71        return 0;
  72}
  73#endif
  74
  75#endif
  76