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 static inline bool mlx5_is_real_time_rq(struct mlx5_core_dev *mdev) 37 { 38 u8 rq_ts_format_cap = MLX5_CAP_GEN(mdev, rq_ts_format); 39 40 return (rq_ts_format_cap == MLX5_RQ_TIMESTAMP_FORMAT_CAP_REAL_TIME || 41 rq_ts_format_cap == MLX5_RQ_TIMESTAMP_FORMAT_CAP_FREE_RUNNING_AND_REAL_TIME); 42 } 43 44 static inline bool mlx5_is_real_time_sq(struct mlx5_core_dev *mdev) 45 { 46 u8 sq_ts_format_cap = MLX5_CAP_GEN(mdev, sq_ts_format); 47 48 return (sq_ts_format_cap == MLX5_SQ_TIMESTAMP_FORMAT_CAP_REAL_TIME || 49 sq_ts_format_cap == MLX5_SQ_TIMESTAMP_FORMAT_CAP_FREE_RUNNING_AND_REAL_TIME); 50 } 51 52 typedef ktime_t (*cqe_ts_to_ns)(struct mlx5_clock *, u64); 53 54 #if IS_ENABLED(CONFIG_PTP_1588_CLOCK) 55 void mlx5_init_clock(struct mlx5_core_dev *mdev); 56 void mlx5_cleanup_clock(struct mlx5_core_dev *mdev); 57 58 static inline int mlx5_clock_get_ptp_index(struct mlx5_core_dev *mdev) 59 { 60 return mdev->clock.ptp ? ptp_clock_index(mdev->clock.ptp) : -1; 61 } 62 63 static inline ktime_t mlx5_timecounter_cyc2time(struct mlx5_clock *clock, 64 u64 timestamp) 65 { 66 struct mlx5_timer *timer = &clock->timer; 67 unsigned int seq; 68 u64 nsec; 69 70 do { 71 seq = read_seqbegin(&clock->lock); 72 nsec = timecounter_cyc2time(&timer->tc, timestamp); 73 } while (read_seqretry(&clock->lock, seq)); 74 75 return ns_to_ktime(nsec); 76 } 77 78 #define REAL_TIME_TO_NS(hi, low) (((u64)hi) * NSEC_PER_SEC + ((u64)low)) 79 80 static inline ktime_t mlx5_real_time_cyc2time(struct mlx5_clock *clock, 81 u64 timestamp) 82 { 83 u64 time = REAL_TIME_TO_NS(timestamp >> 32, timestamp & 0xFFFFFFFF); 84 85 return ns_to_ktime(time); 86 } 87 #else 88 static inline void mlx5_init_clock(struct mlx5_core_dev *mdev) {} 89 static inline void mlx5_cleanup_clock(struct mlx5_core_dev *mdev) {} 90 static inline int mlx5_clock_get_ptp_index(struct mlx5_core_dev *mdev) 91 { 92 return -1; 93 } 94 95 static inline ktime_t mlx5_timecounter_cyc2time(struct mlx5_clock *clock, 96 u64 timestamp) 97 { 98 return 0; 99 } 100 101 static inline ktime_t mlx5_real_time_cyc2time(struct mlx5_clock *clock, 102 u64 timestamp) 103 { 104 return 0; 105 } 106 #endif 107 108 #endif 109