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) 37 void mlx5_init_clock(struct mlx5_core_dev *mdev); 38 void mlx5_cleanup_clock(struct mlx5_core_dev *mdev); 39 40 static inline int mlx5_clock_get_ptp_index(struct mlx5_core_dev *mdev) 41 { 42 return mdev->clock.ptp ? ptp_clock_index(mdev->clock.ptp) : -1; 43 } 44 45 static inline ktime_t mlx5_timecounter_cyc2time(struct mlx5_clock *clock, 46 u64 timestamp) 47 { 48 unsigned int seq; 49 u64 nsec; 50 51 do { 52 seq = read_seqbegin(&clock->lock); 53 nsec = timecounter_cyc2time(&clock->tc, timestamp); 54 } while (read_seqretry(&clock->lock, seq)); 55 56 return ns_to_ktime(nsec); 57 } 58 59 #else 60 static inline void mlx5_init_clock(struct mlx5_core_dev *mdev) {} 61 static inline void mlx5_cleanup_clock(struct mlx5_core_dev *mdev) {} 62 static inline int mlx5_clock_get_ptp_index(struct mlx5_core_dev *mdev) 63 { 64 return -1; 65 } 66 67 static inline ktime_t mlx5_timecounter_cyc2time(struct mlx5_clock *clock, 68 u64 timestamp) 69 { 70 return 0; 71 } 72 #endif 73 74 #endif 75