diff options
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c | 61 |
1 files changed, 60 insertions, 1 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c b/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c index fa8aed62b231..e159243e0fcf 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c @@ -31,6 +31,8 @@ */ #include <linux/clocksource.h> +#include <linux/highmem.h> +#include <rdma/mlx5-abi.h> #include "en.h" enum { @@ -71,6 +73,28 @@ static u64 read_internal_timer(const struct cyclecounter *cc) return mlx5_read_internal_timer(mdev) & cc->mask; } +static void mlx5_update_clock_info_page(struct mlx5_core_dev *mdev) +{ + struct mlx5_ib_clock_info *clock_info = mdev->clock_info; + struct mlx5_clock *clock = &mdev->clock; + u32 sign; + + if (!clock_info) + return; + + sign = smp_load_acquire(&clock_info->sign); + smp_store_mb(clock_info->sign, + sign | MLX5_IB_CLOCK_INFO_KERNEL_UPDATING); + + clock_info->cycles = clock->tc.cycle_last; + clock_info->mult = clock->cycles.mult; + clock_info->nsec = clock->tc.nsec; + clock_info->frac = clock->tc.frac; + + smp_store_release(&clock_info->sign, + sign + MLX5_IB_CLOCK_INFO_KERNEL_UPDATING * 2); +} + static void mlx5_pps_out(struct work_struct *work) { struct mlx5_pps *pps_info = container_of(work, struct mlx5_pps, @@ -109,6 +133,7 @@ static void mlx5_timestamp_overflow(struct work_struct *work) write_lock_irqsave(&clock->lock, flags); timecounter_read(&clock->tc); + mlx5_update_clock_info_page(clock->mdev); write_unlock_irqrestore(&clock->lock, flags); schedule_delayed_work(&clock->overflow_work, clock->overflow_period); } @@ -123,6 +148,7 @@ static int mlx5_ptp_settime(struct ptp_clock_info *ptp, write_lock_irqsave(&clock->lock, flags); timecounter_init(&clock->tc, &clock->cycles, ns); + mlx5_update_clock_info_page(clock->mdev); write_unlock_irqrestore(&clock->lock, flags); return 0; @@ -152,6 +178,7 @@ static int mlx5_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta) write_lock_irqsave(&clock->lock, flags); timecounter_adjtime(&clock->tc, delta); + mlx5_update_clock_info_page(clock->mdev); write_unlock_irqrestore(&clock->lock, flags); return 0; @@ -179,6 +206,7 @@ static int mlx5_ptp_adjfreq(struct ptp_clock_info *ptp, s32 delta) timecounter_read(&clock->tc); clock->cycles.mult = neg_adj ? clock->nominal_c_mult - diff : clock->nominal_c_mult + diff; + mlx5_update_clock_info_page(clock->mdev); write_unlock_irqrestore(&clock->lock, flags); return 0; @@ -423,9 +451,13 @@ void mlx5_pps_event(struct mlx5_core_dev *mdev, switch (clock->ptp_info.pin_config[pin].func) { case PTP_PF_EXTTS: + ptp_event.index = pin; + ptp_event.timestamp = timecounter_cyc2time(&clock->tc, + be64_to_cpu(eqe->data.pps.time_stamp)); if (clock->pps_info.enabled) { ptp_event.type = PTP_CLOCK_PPSUSR; - ptp_event.pps_times.ts_real = ns_to_timespec64(eqe->data.pps.time_stamp); + ptp_event.pps_times.ts_real = + ns_to_timespec64(ptp_event.timestamp); } else { ptp_event.type = PTP_CLOCK_EXTTS; } @@ -470,6 +502,7 @@ void mlx5_init_clock(struct mlx5_core_dev *mdev) clock->cycles.shift); clock->nominal_c_mult = clock->cycles.mult; clock->cycles.mask = CLOCKSOURCE_MASK(41); + clock->mdev = mdev; timecounter_init(&clock->tc, &clock->cycles, ktime_to_ns(ktime_get_real())); @@ -482,6 +515,25 @@ void mlx5_init_clock(struct mlx5_core_dev *mdev) do_div(ns, NSEC_PER_SEC / 2 / HZ); clock->overflow_period = ns; + mdev->clock_info_page = alloc_page(GFP_KERNEL); + if (mdev->clock_info_page) { + mdev->clock_info = kmap(mdev->clock_info_page); + if (!mdev->clock_info) { + __free_page(mdev->clock_info_page); + mlx5_core_warn(mdev, "failed to map clock page\n"); + } else { + mdev->clock_info->sign = 0; + mdev->clock_info->nsec = clock->tc.nsec; + mdev->clock_info->cycles = clock->tc.cycle_last; + mdev->clock_info->mask = clock->cycles.mask; + mdev->clock_info->mult = clock->nominal_c_mult; + mdev->clock_info->shift = clock->cycles.shift; + mdev->clock_info->frac = clock->tc.frac; + mdev->clock_info->overflow_period = + clock->overflow_period; + } + } + INIT_WORK(&clock->pps_info.out_work, mlx5_pps_out); INIT_DELAYED_WORK(&clock->overflow_work, mlx5_timestamp_overflow); if (clock->overflow_period) @@ -521,5 +573,12 @@ void mlx5_cleanup_clock(struct mlx5_core_dev *mdev) cancel_work_sync(&clock->pps_info.out_work); cancel_delayed_work_sync(&clock->overflow_work); + + if (mdev->clock_info) { + kunmap(mdev->clock_info_page); + __free_page(mdev->clock_info_page); + mdev->clock_info = NULL; + } + kfree(clock->ptp_info.pin_config); } |