| /* |
| * Copyright (c) 2017, Mellanox Technologies, Ltd. All rights reserved. |
| * |
| * This software is available to you under a choice of one of two |
| * licenses. You may choose to be licensed under the terms of the GNU |
| * General Public License (GPL) Version 2, available from the file |
| * COPYING in the main directory of this source tree, or the |
| * OpenIB.org BSD license below: |
| * |
| * Redistribution and use in source and binary forms, with or |
| * without modification, are permitted provided that the following |
| * conditions are met: |
| * |
| * - Redistributions of source code must retain the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials |
| * provided with the distribution. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| */ |
| |
| #ifndef __LIB_CLOCK_H__ |
| #define __LIB_CLOCK_H__ |
| |
| static inline bool mlx5_is_real_time_rq(struct mlx5_core_dev *mdev) |
| { |
| u8 rq_ts_format_cap = MLX5_CAP_GEN(mdev, rq_ts_format); |
| |
| return (rq_ts_format_cap == MLX5_TIMESTAMP_FORMAT_CAP_REAL_TIME || |
| rq_ts_format_cap == |
| MLX5_TIMESTAMP_FORMAT_CAP_FREE_RUNNING_AND_REAL_TIME); |
| } |
| |
| static inline bool mlx5_is_real_time_sq(struct mlx5_core_dev *mdev) |
| { |
| u8 sq_ts_format_cap = MLX5_CAP_GEN(mdev, sq_ts_format); |
| |
| return (sq_ts_format_cap == MLX5_TIMESTAMP_FORMAT_CAP_REAL_TIME || |
| sq_ts_format_cap == |
| MLX5_TIMESTAMP_FORMAT_CAP_FREE_RUNNING_AND_REAL_TIME); |
| } |
| |
| typedef ktime_t (*cqe_ts_to_ns)(struct mlx5_clock *, u64); |
| |
| #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); |
| |
| 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) |
| { |
| struct mlx5_timer *timer = &clock->timer; |
| unsigned int seq; |
| u64 nsec; |
| |
| do { |
| seq = read_seqbegin(&clock->lock); |
| nsec = timecounter_cyc2time(&timer->tc, timestamp); |
| } while (read_seqretry(&clock->lock, seq)); |
| |
| return ns_to_ktime(nsec); |
| } |
| |
| #define REAL_TIME_TO_NS(hi, low) (((u64)hi) * NSEC_PER_SEC + ((u64)low)) |
| |
| static inline ktime_t mlx5_real_time_cyc2time(struct mlx5_clock *clock, |
| u64 timestamp) |
| { |
| u64 time = REAL_TIME_TO_NS(timestamp >> 32, timestamp & 0xFFFFFFFF); |
| |
| return ns_to_ktime(time); |
| } |
| #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 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; |
| } |
| |
| static inline ktime_t mlx5_real_time_cyc2time(struct mlx5_clock *clock, |
| u64 timestamp) |
| { |
| return 0; |
| } |
| #endif |
| |
| static inline cqe_ts_to_ns mlx5_rq_ts_translator(struct mlx5_core_dev *mdev) |
| { |
| return mlx5_is_real_time_rq(mdev) ? mlx5_real_time_cyc2time : |
| mlx5_timecounter_cyc2time; |
| } |
| |
| static inline cqe_ts_to_ns mlx5_sq_ts_translator(struct mlx5_core_dev *mdev) |
| { |
| return mlx5_is_real_time_sq(mdev) ? mlx5_real_time_cyc2time : |
| mlx5_timecounter_cyc2time; |
| } |
| #endif |