| /* |
| * Copyright (c) 2015, Mellanox Technologies. 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. |
| */ |
| |
| #include <linux/clocksource.h> |
| #include <linux/highmem.h> |
| #include <linux/ptp_clock_kernel.h> |
| #include <rdma/mlx5-abi.h> |
| #include "lib/eq.h" |
| #include "en.h" |
| #include "clock.h" |
| |
| enum { |
| MLX5_CYCLES_SHIFT = 23 |
| }; |
| |
| enum { |
| MLX5_PIN_MODE_IN = 0x0, |
| MLX5_PIN_MODE_OUT = 0x1, |
| }; |
| |
| enum { |
| MLX5_OUT_PATTERN_PULSE = 0x0, |
| MLX5_OUT_PATTERN_PERIODIC = 0x1, |
| }; |
| |
| enum { |
| MLX5_EVENT_MODE_DISABLE = 0x0, |
| MLX5_EVENT_MODE_REPETETIVE = 0x1, |
| MLX5_EVENT_MODE_ONCE_TILL_ARM = 0x2, |
| }; |
| |
| enum { |
| MLX5_MTPPS_FS_ENABLE = BIT(0x0), |
| MLX5_MTPPS_FS_PATTERN = BIT(0x2), |
| MLX5_MTPPS_FS_PIN_MODE = BIT(0x3), |
| MLX5_MTPPS_FS_TIME_STAMP = BIT(0x4), |
| MLX5_MTPPS_FS_OUT_PULSE_DURATION = BIT(0x5), |
| MLX5_MTPPS_FS_ENH_OUT_PER_ADJ = BIT(0x7), |
| }; |
| |
| static bool mlx5_real_time_mode(struct mlx5_core_dev *mdev) |
| { |
| return (mlx5_is_real_time_rq(mdev) || mlx5_is_real_time_sq(mdev)); |
| } |
| |
| static bool mlx5_modify_mtutc_allowed(struct mlx5_core_dev *mdev) |
| { |
| return MLX5_CAP_MCAM_FEATURE(mdev, ptpcyc2realtime_modify); |
| } |
| |
| static int mlx5_set_mtutc(struct mlx5_core_dev *dev, u32 *mtutc, u32 size) |
| { |
| u32 out[MLX5_ST_SZ_DW(mtutc_reg)] = {}; |
| |
| if (!MLX5_CAP_MCAM_REG(dev, mtutc)) |
| return -EOPNOTSUPP; |
| |
| return mlx5_core_access_reg(dev, mtutc, size, out, sizeof(out), |
| MLX5_REG_MTUTC, 0, 1); |
| } |
| |
| static u64 mlx5_read_time(struct mlx5_core_dev *dev, |
| struct ptp_system_timestamp *sts, |
| bool real_time) |
| { |
| u32 timer_h, timer_h1, timer_l; |
| |
| timer_h = ioread32be(real_time ? &dev->iseg->real_time_h : |
| &dev->iseg->internal_timer_h); |
| ptp_read_system_prets(sts); |
| timer_l = ioread32be(real_time ? &dev->iseg->real_time_l : |
| &dev->iseg->internal_timer_l); |
| ptp_read_system_postts(sts); |
| timer_h1 = ioread32be(real_time ? &dev->iseg->real_time_h : |
| &dev->iseg->internal_timer_h); |
| if (timer_h != timer_h1) { |
| /* wrap around */ |
| ptp_read_system_prets(sts); |
| timer_l = ioread32be(real_time ? &dev->iseg->real_time_l : |
| &dev->iseg->internal_timer_l); |
| ptp_read_system_postts(sts); |
| } |
| |
| return real_time ? REAL_TIME_TO_NS(timer_h1, timer_l) : |
| (u64)timer_l | (u64)timer_h1 << 32; |
| } |
| |
| static u64 read_internal_timer(const struct cyclecounter *cc) |
| { |
| struct mlx5_timer *timer = container_of(cc, struct mlx5_timer, cycles); |
| struct mlx5_clock *clock = container_of(timer, struct mlx5_clock, timer); |
| struct mlx5_core_dev *mdev = container_of(clock, struct mlx5_core_dev, |
| clock); |
| |
| return mlx5_read_time(mdev, NULL, false) & 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; |
| struct mlx5_timer *timer; |
| 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); |
| |
| timer = &clock->timer; |
| clock_info->cycles = timer->tc.cycle_last; |
| clock_info->mult = timer->cycles.mult; |
| clock_info->nsec = timer->tc.nsec; |
| clock_info->frac = timer->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, |
| out_work); |
| struct mlx5_clock *clock = container_of(pps_info, struct mlx5_clock, |
| pps_info); |
| struct mlx5_core_dev *mdev = container_of(clock, struct mlx5_core_dev, |
| clock); |
| u32 in[MLX5_ST_SZ_DW(mtpps_reg)] = {0}; |
| unsigned long flags; |
| int i; |
| |
| for (i = 0; i < clock->ptp_info.n_pins; i++) { |
| u64 tstart; |
| |
| write_seqlock_irqsave(&clock->lock, flags); |
| tstart = clock->pps_info.start[i]; |
| clock->pps_info.start[i] = 0; |
| write_sequnlock_irqrestore(&clock->lock, flags); |
| if (!tstart) |
| continue; |
| |
| MLX5_SET(mtpps_reg, in, pin, i); |
| MLX5_SET64(mtpps_reg, in, time_stamp, tstart); |
| MLX5_SET(mtpps_reg, in, field_select, MLX5_MTPPS_FS_TIME_STAMP); |
| mlx5_set_mtpps(mdev, in, sizeof(in)); |
| } |
| } |
| |
| static void mlx5_timestamp_overflow(struct work_struct *work) |
| { |
| struct delayed_work *dwork = to_delayed_work(work); |
| struct mlx5_core_dev *mdev; |
| struct mlx5_timer *timer; |
| struct mlx5_clock *clock; |
| unsigned long flags; |
| |
| timer = container_of(dwork, struct mlx5_timer, overflow_work); |
| clock = container_of(timer, struct mlx5_clock, timer); |
| mdev = container_of(clock, struct mlx5_core_dev, clock); |
| |
| if (mdev->state == MLX5_DEVICE_STATE_INTERNAL_ERROR) |
| goto out; |
| |
| write_seqlock_irqsave(&clock->lock, flags); |
| timecounter_read(&timer->tc); |
| mlx5_update_clock_info_page(mdev); |
| write_sequnlock_irqrestore(&clock->lock, flags); |
| |
| out: |
| schedule_delayed_work(&timer->overflow_work, timer->overflow_period); |
| } |
| |
| static int mlx5_ptp_settime_real_time(struct mlx5_core_dev *mdev, |
| const struct timespec64 *ts) |
| { |
| u32 in[MLX5_ST_SZ_DW(mtutc_reg)] = {}; |
| |
| if (!mlx5_modify_mtutc_allowed(mdev)) |
| return 0; |
| |
| if (ts->tv_sec < 0 || ts->tv_sec > U32_MAX || |
| ts->tv_nsec < 0 || ts->tv_nsec > NSEC_PER_SEC) |
| return -EINVAL; |
| |
| MLX5_SET(mtutc_reg, in, operation, MLX5_MTUTC_OPERATION_SET_TIME_IMMEDIATE); |
| MLX5_SET(mtutc_reg, in, utc_sec, ts->tv_sec); |
| MLX5_SET(mtutc_reg, in, utc_nsec, ts->tv_nsec); |
| |
| return mlx5_set_mtutc(mdev, in, sizeof(in)); |
| } |
| |
| static int mlx5_ptp_settime(struct ptp_clock_info *ptp, const struct timespec64 *ts) |
| { |
| struct mlx5_clock *clock = container_of(ptp, struct mlx5_clock, ptp_info); |
| struct mlx5_timer *timer = &clock->timer; |
| struct mlx5_core_dev *mdev; |
| unsigned long flags; |
| int err; |
| |
| mdev = container_of(clock, struct mlx5_core_dev, clock); |
| err = mlx5_ptp_settime_real_time(mdev, ts); |
| if (err) |
| return err; |
| |
| write_seqlock_irqsave(&clock->lock, flags); |
| timecounter_init(&timer->tc, &timer->cycles, timespec64_to_ns(ts)); |
| mlx5_update_clock_info_page(mdev); |
| write_sequnlock_irqrestore(&clock->lock, flags); |
| |
| return 0; |
| } |
| |
| static |
| struct timespec64 mlx5_ptp_gettimex_real_time(struct mlx5_core_dev *mdev, |
| struct ptp_system_timestamp *sts) |
| { |
| struct timespec64 ts; |
| u64 time; |
| |
| time = mlx5_read_time(mdev, sts, true); |
| ts = ns_to_timespec64(time); |
| return ts; |
| } |
| |
| static int mlx5_ptp_gettimex(struct ptp_clock_info *ptp, struct timespec64 *ts, |
| struct ptp_system_timestamp *sts) |
| { |
| struct mlx5_clock *clock = container_of(ptp, struct mlx5_clock, ptp_info); |
| struct mlx5_timer *timer = &clock->timer; |
| struct mlx5_core_dev *mdev; |
| unsigned long flags; |
| u64 cycles, ns; |
| |
| mdev = container_of(clock, struct mlx5_core_dev, clock); |
| if (mlx5_real_time_mode(mdev)) { |
| *ts = mlx5_ptp_gettimex_real_time(mdev, sts); |
| goto out; |
| } |
| |
| write_seqlock_irqsave(&clock->lock, flags); |
| cycles = mlx5_read_time(mdev, sts, false); |
| ns = timecounter_cyc2time(&timer->tc, cycles); |
| write_sequnlock_irqrestore(&clock->lock, flags); |
| *ts = ns_to_timespec64(ns); |
| out: |
| return 0; |
| } |
| |
| static int mlx5_ptp_adjtime_real_time(struct mlx5_core_dev *mdev, s64 delta) |
| { |
| u32 in[MLX5_ST_SZ_DW(mtutc_reg)] = {}; |
| |
| if (!mlx5_modify_mtutc_allowed(mdev)) |
| return 0; |
| |
| /* HW time adjustment range is s16. If out of range, settime instead */ |
| if (delta < S16_MIN || delta > S16_MAX) { |
| struct timespec64 ts; |
| s64 ns; |
| |
| ts = mlx5_ptp_gettimex_real_time(mdev, NULL); |
| ns = timespec64_to_ns(&ts) + delta; |
| ts = ns_to_timespec64(ns); |
| return mlx5_ptp_settime_real_time(mdev, &ts); |
| } |
| |
| MLX5_SET(mtutc_reg, in, operation, MLX5_MTUTC_OPERATION_ADJUST_TIME); |
| MLX5_SET(mtutc_reg, in, time_adjustment, delta); |
| |
| return mlx5_set_mtutc(mdev, in, sizeof(in)); |
| } |
| |
| static int mlx5_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta) |
| { |
| struct mlx5_clock *clock = container_of(ptp, struct mlx5_clock, ptp_info); |
| struct mlx5_timer *timer = &clock->timer; |
| struct mlx5_core_dev *mdev; |
| unsigned long flags; |
| int err; |
| |
| mdev = container_of(clock, struct mlx5_core_dev, clock); |
| |
| err = mlx5_ptp_adjtime_real_time(mdev, delta); |
| if (err) |
| return err; |
| write_seqlock_irqsave(&clock->lock, flags); |
| timecounter_adjtime(&timer->tc, delta); |
| mlx5_update_clock_info_page(mdev); |
| write_sequnlock_irqrestore(&clock->lock, flags); |
| |
| return 0; |
| } |
| |
| static int mlx5_ptp_adjfreq_real_time(struct mlx5_core_dev *mdev, s32 freq) |
| { |
| u32 in[MLX5_ST_SZ_DW(mtutc_reg)] = {}; |
| |
| if (!mlx5_modify_mtutc_allowed(mdev)) |
| return 0; |
| |
| MLX5_SET(mtutc_reg, in, operation, MLX5_MTUTC_OPERATION_ADJUST_FREQ_UTC); |
| MLX5_SET(mtutc_reg, in, freq_adjustment, freq); |
| |
| return mlx5_set_mtutc(mdev, in, sizeof(in)); |
| } |
| |
| static int mlx5_ptp_adjfreq(struct ptp_clock_info *ptp, s32 delta) |
| { |
| struct mlx5_clock *clock = container_of(ptp, struct mlx5_clock, ptp_info); |
| struct mlx5_timer *timer = &clock->timer; |
| struct mlx5_core_dev *mdev; |
| unsigned long flags; |
| int neg_adj = 0; |
| u32 diff; |
| u64 adj; |
| int err; |
| |
| mdev = container_of(clock, struct mlx5_core_dev, clock); |
| err = mlx5_ptp_adjfreq_real_time(mdev, delta); |
| if (err) |
| return err; |
| |
| if (delta < 0) { |
| neg_adj = 1; |
| delta = -delta; |
| } |
| |
| adj = timer->nominal_c_mult; |
| adj *= delta; |
| diff = div_u64(adj, 1000000000ULL); |
| |
| write_seqlock_irqsave(&clock->lock, flags); |
| timecounter_read(&timer->tc); |
| timer->cycles.mult = neg_adj ? timer->nominal_c_mult - diff : |
| timer->nominal_c_mult + diff; |
| mlx5_update_clock_info_page(mdev); |
| write_sequnlock_irqrestore(&clock->lock, flags); |
| |
| return 0; |
| } |
| |
| static int mlx5_extts_configure(struct ptp_clock_info *ptp, |
| struct ptp_clock_request *rq, |
| int on) |
| { |
| struct mlx5_clock *clock = |
| container_of(ptp, struct mlx5_clock, ptp_info); |
| struct mlx5_core_dev *mdev = |
| container_of(clock, struct mlx5_core_dev, clock); |
| u32 in[MLX5_ST_SZ_DW(mtpps_reg)] = {0}; |
| u32 field_select = 0; |
| u8 pin_mode = 0; |
| u8 pattern = 0; |
| int pin = -1; |
| int err = 0; |
| |
| if (!MLX5_PPS_CAP(mdev)) |
| return -EOPNOTSUPP; |
| |
| /* Reject requests with unsupported flags */ |
| if (rq->extts.flags & ~(PTP_ENABLE_FEATURE | |
| PTP_RISING_EDGE | |
| PTP_FALLING_EDGE | |
| PTP_STRICT_FLAGS)) |
| return -EOPNOTSUPP; |
| |
| /* Reject requests to enable time stamping on both edges. */ |
| if ((rq->extts.flags & PTP_STRICT_FLAGS) && |
| (rq->extts.flags & PTP_ENABLE_FEATURE) && |
| (rq->extts.flags & PTP_EXTTS_EDGES) == PTP_EXTTS_EDGES) |
| return -EOPNOTSUPP; |
| |
| if (rq->extts.index >= clock->ptp_info.n_pins) |
| return -EINVAL; |
| |
| pin = ptp_find_pin(clock->ptp, PTP_PF_EXTTS, rq->extts.index); |
| if (pin < 0) |
| return -EBUSY; |
| |
| if (on) { |
| pin_mode = MLX5_PIN_MODE_IN; |
| pattern = !!(rq->extts.flags & PTP_FALLING_EDGE); |
| field_select = MLX5_MTPPS_FS_PIN_MODE | |
| MLX5_MTPPS_FS_PATTERN | |
| MLX5_MTPPS_FS_ENABLE; |
| } else { |
| field_select = MLX5_MTPPS_FS_ENABLE; |
| } |
| |
| MLX5_SET(mtpps_reg, in, pin, pin); |
| MLX5_SET(mtpps_reg, in, pin_mode, pin_mode); |
| MLX5_SET(mtpps_reg, in, pattern, pattern); |
| MLX5_SET(mtpps_reg, in, enable, on); |
| MLX5_SET(mtpps_reg, in, field_select, field_select); |
| |
| err = mlx5_set_mtpps(mdev, in, sizeof(in)); |
| if (err) |
| return err; |
| |
| return mlx5_set_mtppse(mdev, pin, 0, |
| MLX5_EVENT_MODE_REPETETIVE & on); |
| } |
| |
| static u64 find_target_cycles(struct mlx5_core_dev *mdev, s64 target_ns) |
| { |
| struct mlx5_clock *clock = &mdev->clock; |
| u64 cycles_now, cycles_delta; |
| u64 nsec_now, nsec_delta; |
| struct mlx5_timer *timer; |
| unsigned long flags; |
| |
| timer = &clock->timer; |
| |
| cycles_now = mlx5_read_time(mdev, NULL, false); |
| write_seqlock_irqsave(&clock->lock, flags); |
| nsec_now = timecounter_cyc2time(&timer->tc, cycles_now); |
| nsec_delta = target_ns - nsec_now; |
| cycles_delta = div64_u64(nsec_delta << timer->cycles.shift, |
| timer->cycles.mult); |
| write_sequnlock_irqrestore(&clock->lock, flags); |
| |
| return cycles_now + cycles_delta; |
| } |
| |
| static u64 perout_conf_internal_timer(struct mlx5_core_dev *mdev, s64 sec) |
| { |
| struct timespec64 ts = {}; |
| s64 target_ns; |
| |
| ts.tv_sec = sec; |
| target_ns = timespec64_to_ns(&ts); |
| |
| return find_target_cycles(mdev, target_ns); |
| } |
| |
| static u64 perout_conf_real_time(s64 sec) |
| { |
| return (u64)sec << 32; |
| } |
| |
| static int mlx5_perout_configure(struct ptp_clock_info *ptp, |
| struct ptp_clock_request *rq, |
| int on) |
| { |
| struct mlx5_clock *clock = |
| container_of(ptp, struct mlx5_clock, ptp_info); |
| struct mlx5_core_dev *mdev = |
| container_of(clock, struct mlx5_core_dev, clock); |
| bool rt_mode = mlx5_real_time_mode(mdev); |
| u32 in[MLX5_ST_SZ_DW(mtpps_reg)] = {0}; |
| struct timespec64 ts; |
| u32 field_select = 0; |
| u64 time_stamp = 0; |
| u8 pin_mode = 0; |
| u8 pattern = 0; |
| int pin = -1; |
| int err = 0; |
| s64 ns; |
| |
| if (!MLX5_PPS_CAP(mdev)) |
| return -EOPNOTSUPP; |
| |
| /* Reject requests with unsupported flags */ |
| if (rq->perout.flags) |
| return -EOPNOTSUPP; |
| |
| if (rq->perout.index >= clock->ptp_info.n_pins) |
| return -EINVAL; |
| |
| field_select = MLX5_MTPPS_FS_ENABLE; |
| pin = ptp_find_pin(clock->ptp, PTP_PF_PEROUT, rq->perout.index); |
| if (pin < 0) |
| return -EBUSY; |
| |
| if (on) { |
| bool rt_mode = mlx5_real_time_mode(mdev); |
| s64 sec = rq->perout.start.sec; |
| |
| if (rq->perout.start.nsec) |
| return -EINVAL; |
| |
| pin_mode = MLX5_PIN_MODE_OUT; |
| pattern = MLX5_OUT_PATTERN_PERIODIC; |
| ts.tv_sec = rq->perout.period.sec; |
| ts.tv_nsec = rq->perout.period.nsec; |
| ns = timespec64_to_ns(&ts); |
| |
| if ((ns >> 1) != 500000000LL) |
| return -EINVAL; |
| |
| if (rt_mode && sec > U32_MAX) |
| return -EINVAL; |
| |
| time_stamp = rt_mode ? perout_conf_real_time(sec) : |
| perout_conf_internal_timer(mdev, sec); |
| |
| field_select |= MLX5_MTPPS_FS_PIN_MODE | |
| MLX5_MTPPS_FS_PATTERN | |
| MLX5_MTPPS_FS_TIME_STAMP; |
| } |
| |
| MLX5_SET(mtpps_reg, in, pin, pin); |
| MLX5_SET(mtpps_reg, in, pin_mode, pin_mode); |
| MLX5_SET(mtpps_reg, in, pattern, pattern); |
| MLX5_SET(mtpps_reg, in, enable, on); |
| MLX5_SET64(mtpps_reg, in, time_stamp, time_stamp); |
| MLX5_SET(mtpps_reg, in, field_select, field_select); |
| |
| err = mlx5_set_mtpps(mdev, in, sizeof(in)); |
| if (err) |
| return err; |
| |
| if (rt_mode) |
| return 0; |
| |
| return mlx5_set_mtppse(mdev, pin, 0, |
| MLX5_EVENT_MODE_REPETETIVE & on); |
| } |
| |
| static int mlx5_pps_configure(struct ptp_clock_info *ptp, |
| struct ptp_clock_request *rq, |
| int on) |
| { |
| struct mlx5_clock *clock = |
| container_of(ptp, struct mlx5_clock, ptp_info); |
| |
| clock->pps_info.enabled = !!on; |
| return 0; |
| } |
| |
| static int mlx5_ptp_enable(struct ptp_clock_info *ptp, |
| struct ptp_clock_request *rq, |
| int on) |
| { |
| switch (rq->type) { |
| case PTP_CLK_REQ_EXTTS: |
| return mlx5_extts_configure(ptp, rq, on); |
| case PTP_CLK_REQ_PEROUT: |
| return mlx5_perout_configure(ptp, rq, on); |
| case PTP_CLK_REQ_PPS: |
| return mlx5_pps_configure(ptp, rq, on); |
| default: |
| return -EOPNOTSUPP; |
| } |
| return 0; |
| } |
| |
| enum { |
| MLX5_MTPPS_REG_CAP_PIN_X_MODE_SUPPORT_PPS_IN = BIT(0), |
| MLX5_MTPPS_REG_CAP_PIN_X_MODE_SUPPORT_PPS_OUT = BIT(1), |
| }; |
| |
| static int mlx5_ptp_verify(struct ptp_clock_info *ptp, unsigned int pin, |
| enum ptp_pin_function func, unsigned int chan) |
| { |
| struct mlx5_clock *clock = container_of(ptp, struct mlx5_clock, |
| ptp_info); |
| |
| switch (func) { |
| case PTP_PF_NONE: |
| return 0; |
| case PTP_PF_EXTTS: |
| return !(clock->pps_info.pin_caps[pin] & |
| MLX5_MTPPS_REG_CAP_PIN_X_MODE_SUPPORT_PPS_IN); |
| case PTP_PF_PEROUT: |
| return !(clock->pps_info.pin_caps[pin] & |
| MLX5_MTPPS_REG_CAP_PIN_X_MODE_SUPPORT_PPS_OUT); |
| default: |
| return -EOPNOTSUPP; |
| } |
| } |
| |
| static const struct ptp_clock_info mlx5_ptp_clock_info = { |
| .owner = THIS_MODULE, |
| .name = "mlx5_ptp", |
| .max_adj = 50000000, |
| .n_alarm = 0, |
| .n_ext_ts = 0, |
| .n_per_out = 0, |
| .n_pins = 0, |
| .pps = 0, |
| .adjfreq = mlx5_ptp_adjfreq, |
| .adjtime = mlx5_ptp_adjtime, |
| .gettimex64 = mlx5_ptp_gettimex, |
| .settime64 = mlx5_ptp_settime, |
| .enable = NULL, |
| .verify = NULL, |
| }; |
| |
| static int mlx5_query_mtpps_pin_mode(struct mlx5_core_dev *mdev, u8 pin, |
| u32 *mtpps, u32 mtpps_size) |
| { |
| u32 in[MLX5_ST_SZ_DW(mtpps_reg)] = {}; |
| |
| MLX5_SET(mtpps_reg, in, pin, pin); |
| |
| return mlx5_core_access_reg(mdev, in, sizeof(in), mtpps, |
| mtpps_size, MLX5_REG_MTPPS, 0, 0); |
| } |
| |
| static int mlx5_get_pps_pin_mode(struct mlx5_clock *clock, u8 pin) |
| { |
| struct mlx5_core_dev *mdev = container_of(clock, struct mlx5_core_dev, clock); |
| |
| u32 out[MLX5_ST_SZ_DW(mtpps_reg)] = {}; |
| u8 mode; |
| int err; |
| |
| err = mlx5_query_mtpps_pin_mode(mdev, pin, out, sizeof(out)); |
| if (err || !MLX5_GET(mtpps_reg, out, enable)) |
| return PTP_PF_NONE; |
| |
| mode = MLX5_GET(mtpps_reg, out, pin_mode); |
| |
| if (mode == MLX5_PIN_MODE_IN) |
| return PTP_PF_EXTTS; |
| else if (mode == MLX5_PIN_MODE_OUT) |
| return PTP_PF_PEROUT; |
| |
| return PTP_PF_NONE; |
| } |
| |
| static void mlx5_init_pin_config(struct mlx5_clock *clock) |
| { |
| int i; |
| |
| if (!clock->ptp_info.n_pins) |
| return; |
| |
| clock->ptp_info.pin_config = |
| kcalloc(clock->ptp_info.n_pins, |
| sizeof(*clock->ptp_info.pin_config), |
| GFP_KERNEL); |
| if (!clock->ptp_info.pin_config) |
| return; |
| clock->ptp_info.enable = mlx5_ptp_enable; |
| clock->ptp_info.verify = mlx5_ptp_verify; |
| clock->ptp_info.pps = 1; |
| |
| for (i = 0; i < clock->ptp_info.n_pins; i++) { |
| snprintf(clock->ptp_info.pin_config[i].name, |
| sizeof(clock->ptp_info.pin_config[i].name), |
| "mlx5_pps%d", i); |
| clock->ptp_info.pin_config[i].index = i; |
| clock->ptp_info.pin_config[i].func = mlx5_get_pps_pin_mode(clock, i); |
| clock->ptp_info.pin_config[i].chan = 0; |
| } |
| } |
| |
| static void mlx5_get_pps_caps(struct mlx5_core_dev *mdev) |
| { |
| struct mlx5_clock *clock = &mdev->clock; |
| u32 out[MLX5_ST_SZ_DW(mtpps_reg)] = {0}; |
| |
| mlx5_query_mtpps(mdev, out, sizeof(out)); |
| |
| clock->ptp_info.n_pins = MLX5_GET(mtpps_reg, out, |
| cap_number_of_pps_pins); |
| clock->ptp_info.n_ext_ts = MLX5_GET(mtpps_reg, out, |
| cap_max_num_of_pps_in_pins); |
| clock->ptp_info.n_per_out = MLX5_GET(mtpps_reg, out, |
| cap_max_num_of_pps_out_pins); |
| |
| clock->pps_info.pin_caps[0] = MLX5_GET(mtpps_reg, out, cap_pin_0_mode); |
| clock->pps_info.pin_caps[1] = MLX5_GET(mtpps_reg, out, cap_pin_1_mode); |
| clock->pps_info.pin_caps[2] = MLX5_GET(mtpps_reg, out, cap_pin_2_mode); |
| clock->pps_info.pin_caps[3] = MLX5_GET(mtpps_reg, out, cap_pin_3_mode); |
| clock->pps_info.pin_caps[4] = MLX5_GET(mtpps_reg, out, cap_pin_4_mode); |
| clock->pps_info.pin_caps[5] = MLX5_GET(mtpps_reg, out, cap_pin_5_mode); |
| clock->pps_info.pin_caps[6] = MLX5_GET(mtpps_reg, out, cap_pin_6_mode); |
| clock->pps_info.pin_caps[7] = MLX5_GET(mtpps_reg, out, cap_pin_7_mode); |
| } |
| |
| static void ts_next_sec(struct timespec64 *ts) |
| { |
| ts->tv_sec += 1; |
| ts->tv_nsec = 0; |
| } |
| |
| static u64 perout_conf_next_event_timer(struct mlx5_core_dev *mdev, |
| struct mlx5_clock *clock) |
| { |
| struct timespec64 ts; |
| s64 target_ns; |
| |
| mlx5_ptp_gettimex(&clock->ptp_info, &ts, NULL); |
| ts_next_sec(&ts); |
| target_ns = timespec64_to_ns(&ts); |
| |
| return find_target_cycles(mdev, target_ns); |
| } |
| |
| static int mlx5_pps_event(struct notifier_block *nb, |
| unsigned long type, void *data) |
| { |
| struct mlx5_clock *clock = mlx5_nb_cof(nb, struct mlx5_clock, pps_nb); |
| struct ptp_clock_event ptp_event; |
| struct mlx5_eqe *eqe = data; |
| int pin = eqe->data.pps.pin; |
| struct mlx5_core_dev *mdev; |
| unsigned long flags; |
| u64 ns; |
| |
| mdev = container_of(clock, struct mlx5_core_dev, clock); |
| |
| switch (clock->ptp_info.pin_config[pin].func) { |
| case PTP_PF_EXTTS: |
| ptp_event.index = pin; |
| ptp_event.timestamp = mlx5_real_time_mode(mdev) ? |
| mlx5_real_time_cyc2time(clock, |
| be64_to_cpu(eqe->data.pps.time_stamp)) : |
| mlx5_timecounter_cyc2time(clock, |
| 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(ptp_event.timestamp); |
| } else { |
| ptp_event.type = PTP_CLOCK_EXTTS; |
| } |
| /* TODOL clock->ptp can be NULL if ptp_clock_register fails */ |
| ptp_clock_event(clock->ptp, &ptp_event); |
| break; |
| case PTP_PF_PEROUT: |
| ns = perout_conf_next_event_timer(mdev, clock); |
| write_seqlock_irqsave(&clock->lock, flags); |
| clock->pps_info.start[pin] = ns; |
| write_sequnlock_irqrestore(&clock->lock, flags); |
| schedule_work(&clock->pps_info.out_work); |
| break; |
| default: |
| mlx5_core_err(mdev, " Unhandled clock PPS event, func %d\n", |
| clock->ptp_info.pin_config[pin].func); |
| } |
| |
| return NOTIFY_OK; |
| } |
| |
| static void mlx5_timecounter_init(struct mlx5_core_dev *mdev) |
| { |
| struct mlx5_clock *clock = &mdev->clock; |
| struct mlx5_timer *timer = &clock->timer; |
| u32 dev_freq; |
| |
| dev_freq = MLX5_CAP_GEN(mdev, device_frequency_khz); |
| timer->cycles.read = read_internal_timer; |
| timer->cycles.shift = MLX5_CYCLES_SHIFT; |
| timer->cycles.mult = clocksource_khz2mult(dev_freq, |
| timer->cycles.shift); |
| timer->nominal_c_mult = timer->cycles.mult; |
| timer->cycles.mask = CLOCKSOURCE_MASK(41); |
| |
| timecounter_init(&timer->tc, &timer->cycles, |
| ktime_to_ns(ktime_get_real())); |
| } |
| |
| static void mlx5_init_overflow_period(struct mlx5_clock *clock) |
| { |
| struct mlx5_core_dev *mdev = container_of(clock, struct mlx5_core_dev, clock); |
| struct mlx5_ib_clock_info *clock_info = mdev->clock_info; |
| struct mlx5_timer *timer = &clock->timer; |
| u64 overflow_cycles; |
| u64 frac = 0; |
| u64 ns; |
| |
| /* Calculate period in seconds to call the overflow watchdog - to make |
| * sure counter is checked at least twice every wrap around. |
| * The period is calculated as the minimum between max HW cycles count |
| * (The clock source mask) and max amount of cycles that can be |
| * multiplied by clock multiplier where the result doesn't exceed |
| * 64bits. |
| */ |
| overflow_cycles = div64_u64(~0ULL >> 1, timer->cycles.mult); |
| overflow_cycles = min(overflow_cycles, div_u64(timer->cycles.mask, 3)); |
| |
| ns = cyclecounter_cyc2ns(&timer->cycles, overflow_cycles, |
| frac, &frac); |
| do_div(ns, NSEC_PER_SEC / HZ); |
| timer->overflow_period = ns; |
| |
| INIT_DELAYED_WORK(&timer->overflow_work, mlx5_timestamp_overflow); |
| if (timer->overflow_period) |
| schedule_delayed_work(&timer->overflow_work, 0); |
| else |
| mlx5_core_warn(mdev, |
| "invalid overflow period, overflow_work is not scheduled\n"); |
| |
| if (clock_info) |
| clock_info->overflow_period = timer->overflow_period; |
| } |
| |
| static void mlx5_init_clock_info(struct mlx5_core_dev *mdev) |
| { |
| struct mlx5_clock *clock = &mdev->clock; |
| struct mlx5_ib_clock_info *info; |
| struct mlx5_timer *timer; |
| |
| mdev->clock_info = (struct mlx5_ib_clock_info *)get_zeroed_page(GFP_KERNEL); |
| if (!mdev->clock_info) { |
| mlx5_core_warn(mdev, "Failed to allocate IB clock info page\n"); |
| return; |
| } |
| |
| info = mdev->clock_info; |
| timer = &clock->timer; |
| |
| info->nsec = timer->tc.nsec; |
| info->cycles = timer->tc.cycle_last; |
| info->mask = timer->cycles.mask; |
| info->mult = timer->nominal_c_mult; |
| info->shift = timer->cycles.shift; |
| info->frac = timer->tc.frac; |
| } |
| |
| static void mlx5_init_timer_clock(struct mlx5_core_dev *mdev) |
| { |
| struct mlx5_clock *clock = &mdev->clock; |
| |
| mlx5_timecounter_init(mdev); |
| mlx5_init_clock_info(mdev); |
| mlx5_init_overflow_period(clock); |
| clock->ptp_info = mlx5_ptp_clock_info; |
| |
| if (mlx5_real_time_mode(mdev)) { |
| struct timespec64 ts; |
| |
| ktime_get_real_ts64(&ts); |
| mlx5_ptp_settime(&clock->ptp_info, &ts); |
| } |
| } |
| |
| static void mlx5_init_pps(struct mlx5_core_dev *mdev) |
| { |
| struct mlx5_clock *clock = &mdev->clock; |
| |
| if (!MLX5_PPS_CAP(mdev)) |
| return; |
| |
| mlx5_get_pps_caps(mdev); |
| mlx5_init_pin_config(clock); |
| } |
| |
| void mlx5_init_clock(struct mlx5_core_dev *mdev) |
| { |
| struct mlx5_clock *clock = &mdev->clock; |
| |
| if (!MLX5_CAP_GEN(mdev, device_frequency_khz)) { |
| mlx5_core_warn(mdev, "invalid device_frequency_khz, aborting HW clock init\n"); |
| return; |
| } |
| |
| seqlock_init(&clock->lock); |
| mlx5_init_timer_clock(mdev); |
| INIT_WORK(&clock->pps_info.out_work, mlx5_pps_out); |
| |
| /* Configure the PHC */ |
| clock->ptp_info = mlx5_ptp_clock_info; |
| |
| /* Initialize 1PPS data structures */ |
| mlx5_init_pps(mdev); |
| |
| clock->ptp = ptp_clock_register(&clock->ptp_info, |
| &mdev->pdev->dev); |
| if (IS_ERR(clock->ptp)) { |
| mlx5_core_warn(mdev, "ptp_clock_register failed %ld\n", |
| PTR_ERR(clock->ptp)); |
| clock->ptp = NULL; |
| } |
| |
| MLX5_NB_INIT(&clock->pps_nb, mlx5_pps_event, PPS_EVENT); |
| mlx5_eq_notifier_register(mdev, &clock->pps_nb); |
| } |
| |
| void mlx5_cleanup_clock(struct mlx5_core_dev *mdev) |
| { |
| struct mlx5_clock *clock = &mdev->clock; |
| |
| if (!MLX5_CAP_GEN(mdev, device_frequency_khz)) |
| return; |
| |
| mlx5_eq_notifier_unregister(mdev, &clock->pps_nb); |
| if (clock->ptp) { |
| ptp_clock_unregister(clock->ptp); |
| clock->ptp = NULL; |
| } |
| |
| cancel_work_sync(&clock->pps_info.out_work); |
| cancel_delayed_work_sync(&clock->timer.overflow_work); |
| |
| if (mdev->clock_info) { |
| free_page((unsigned long)mdev->clock_info); |
| mdev->clock_info = NULL; |
| } |
| |
| kfree(clock->ptp_info.pin_config); |
| } |