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/*
* 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__
#include <linux/ptp_clock_kernel.h>
#define MAX_PIN_NUM 8
struct mlx5_pps {
u8 pin_caps[MAX_PIN_NUM];
u64 start[MAX_PIN_NUM];
u8 enabled;
u64 min_npps_period;
u64 min_out_pulse_duration_ns;
bool pin_armed[MAX_PIN_NUM];
};
struct mlx5_timer {
struct cyclecounter cycles;
struct timecounter tc;
u32 nominal_c_mult;
unsigned long overflow_period;
};
struct mlx5_clock {
seqlock_t lock;
struct hwtstamp_config hwtstamp_config;
struct ptp_clock *ptp;
struct ptp_clock_info ptp_info;
struct mlx5_pps pps_info;
struct mlx5_timer timer;
bool shared;
};
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)
int mlx5_init_clock(struct mlx5_core_dev *mdev);
void mlx5_cleanup_clock(struct mlx5_core_dev *mdev);
void mlx5_clock_load(struct mlx5_core_dev *mdev);
void mlx5_clock_unload(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 int mlx5_init_clock(struct mlx5_core_dev *mdev) { return 0; }
static inline void mlx5_cleanup_clock(struct mlx5_core_dev *mdev) {}
static inline void mlx5_clock_load(struct mlx5_core_dev *mdev) {}
static inline void mlx5_clock_unload(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
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