cregit-Linux how code gets into the kernel

Release 4.11 drivers/net/ethernet/mellanox/mlx5/core/en_clock.c

/*
 * 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 "en.h"

enum {
	
MLX5E_CYCLES_SHIFT	= 23
};

enum {
	
MLX5E_PIN_MODE_IN		= 0x0,
	
MLX5E_PIN_MODE_OUT		= 0x1,
};

enum {
	
MLX5E_OUT_PATTERN_PULSE		= 0x0,
	
MLX5E_OUT_PATTERN_PERIODIC	= 0x1,
};

enum {
	
MLX5E_EVENT_MODE_DISABLE	= 0x0,
	
MLX5E_EVENT_MODE_REPETETIVE	= 0x1,
	
MLX5E_EVENT_MODE_ONCE_TILL_ARM	= 0x2,
};


void mlx5e_fill_hwstamp(struct mlx5e_tstamp *tstamp, u64 timestamp, struct skb_shared_hwtstamps *hwts) { u64 nsec; read_lock(&tstamp->lock); nsec = timecounter_cyc2time(&tstamp->clock, timestamp); read_unlock(&tstamp->lock); hwts->hwtstamp = ns_to_ktime(nsec); }

Contributors

PersonTokensPropCommitsCommitProp
Eran Ben Elisha58100.00%1100.00%
Total58100.00%1100.00%


static u64 mlx5e_read_internal_timer(const struct cyclecounter *cc) { struct mlx5e_tstamp *tstamp = container_of(cc, struct mlx5e_tstamp, cycles); return mlx5_read_internal_timer(tstamp->mdev) & cc->mask; }

Contributors

PersonTokensPropCommitsCommitProp
Eran Ben Elisha3897.44%150.00%
Thomas Gleixner12.56%150.00%
Total39100.00%2100.00%


static void mlx5e_timestamp_overflow(struct work_struct *work) { struct delayed_work *dwork = to_delayed_work(work); struct mlx5e_tstamp *tstamp = container_of(dwork, struct mlx5e_tstamp, overflow_work); unsigned long flags; write_lock_irqsave(&tstamp->lock, flags); timecounter_read(&tstamp->clock); write_unlock_irqrestore(&tstamp->lock, flags); schedule_delayed_work(&tstamp->overflow_work, tstamp->overflow_period); }

Contributors

PersonTokensPropCommitsCommitProp
Eran Ben Elisha80100.00%2100.00%
Total80100.00%2100.00%


int mlx5e_hwstamp_set(struct net_device *dev, struct ifreq *ifr) { struct mlx5e_priv *priv = netdev_priv(dev); struct hwtstamp_config config; if (!MLX5_CAP_GEN(priv->mdev, device_frequency_khz)) return -EOPNOTSUPP; if (copy_from_user(&config, ifr->ifr_data, sizeof(config))) return -EFAULT; /* TX HW timestamp */ switch (config.tx_type) { case HWTSTAMP_TX_OFF: case HWTSTAMP_TX_ON: break; default: return -ERANGE; } mutex_lock(&priv->state_lock); /* RX HW timestamp */ switch (config.rx_filter) { case HWTSTAMP_FILTER_NONE: /* Reset CQE compression to Admin default */ mlx5e_modify_rx_cqe_compression_locked(priv, priv->params.rx_cqe_compress_def); break; case HWTSTAMP_FILTER_ALL: case HWTSTAMP_FILTER_SOME: case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: case HWTSTAMP_FILTER_PTP_V2_EVENT: case HWTSTAMP_FILTER_PTP_V2_SYNC: case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: /* Disable CQE compression */ netdev_warn(dev, "Disabling cqe compression"); mlx5e_modify_rx_cqe_compression_locked(priv, false); config.rx_filter = HWTSTAMP_FILTER_ALL; break; default: mutex_unlock(&priv->state_lock); return -ERANGE; } memcpy(&priv->tstamp.hwtstamp_config, &config, sizeof(config)); mutex_unlock(&priv->state_lock); return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ? -EFAULT : 0; }

Contributors

PersonTokensPropCommitsCommitProp
Eran Ben Elisha19379.10%125.00%
Shaker Daibes3413.93%250.00%
Tariq Toukan176.97%125.00%
Total244100.00%4100.00%


int mlx5e_hwstamp_get(struct net_device *dev, struct ifreq *ifr) { struct mlx5e_priv *priv = netdev_priv(dev); struct hwtstamp_config *cfg = &priv->tstamp.hwtstamp_config; if (!MLX5_CAP_GEN(priv->mdev, device_frequency_khz)) return -EOPNOTSUPP; return copy_to_user(ifr->ifr_data, cfg, sizeof(*cfg)) ? -EFAULT : 0; }

Contributors

PersonTokensPropCommitsCommitProp
Eran Ben Elisha74100.00%1100.00%
Total74100.00%1100.00%


static int mlx5e_ptp_settime(struct ptp_clock_info *ptp, const struct timespec64 *ts) { struct mlx5e_tstamp *tstamp = container_of(ptp, struct mlx5e_tstamp, ptp_info); u64 ns = timespec64_to_ns(ts); unsigned long flags; write_lock_irqsave(&tstamp->lock, flags); timecounter_init(&tstamp->clock, &tstamp->cycles, ns); write_unlock_irqrestore(&tstamp->lock, flags); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Eran Ben Elisha82100.00%2100.00%
Total82100.00%2100.00%


static int mlx5e_ptp_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts) { struct mlx5e_tstamp *tstamp = container_of(ptp, struct mlx5e_tstamp, ptp_info); u64 ns; unsigned long flags; write_lock_irqsave(&tstamp->lock, flags); ns = timecounter_read(&tstamp->clock); write_unlock_irqrestore(&tstamp->lock, flags); *ts = ns_to_timespec64(ns); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Eran Ben Elisha79100.00%2100.00%
Total79100.00%2100.00%


static int mlx5e_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta) { struct mlx5e_tstamp *tstamp = container_of(ptp, struct mlx5e_tstamp, ptp_info); unsigned long flags; write_lock_irqsave(&tstamp->lock, flags); timecounter_adjtime(&tstamp->clock, delta); write_unlock_irqrestore(&tstamp->lock, flags); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Eran Ben Elisha66100.00%2100.00%
Total66100.00%2100.00%


static int mlx5e_ptp_adjfreq(struct ptp_clock_info *ptp, s32 delta) { u64 adj; u32 diff; unsigned long flags; int neg_adj = 0; struct mlx5e_tstamp *tstamp = container_of(ptp, struct mlx5e_tstamp, ptp_info); struct mlx5e_priv *priv = container_of(tstamp, struct mlx5e_priv, tstamp); if (MLX5_CAP_GEN(priv->mdev, pps_modify)) { u32 in[MLX5_ST_SZ_DW(mtpps_reg)] = {0}; /* For future use need to add a loop for finding all 1PPS out pins */ MLX5_SET(mtpps_reg, in, pin_mode, MLX5E_PIN_MODE_OUT); MLX5_SET(mtpps_reg, in, out_periodic_adjustment, delta & 0xFFFF); mlx5_set_mtpps(priv->mdev, in, sizeof(in)); } if (delta < 0) { neg_adj = 1; delta = -delta; } adj = tstamp->nominal_c_mult; adj *= delta; diff = div_u64(adj, 1000000000ULL); write_lock_irqsave(&tstamp->lock, flags); timecounter_read(&tstamp->clock); tstamp->cycles.mult = neg_adj ? tstamp->nominal_c_mult - diff : tstamp->nominal_c_mult + diff; write_unlock_irqrestore(&tstamp->lock, flags); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Eran Ben Elisha13162.09%266.67%
Eugenia Emantayev8037.91%133.33%
Total211100.00%3100.00%


static int mlx5e_extts_configure(struct ptp_clock_info *ptp, struct ptp_clock_request *rq, int on) { struct mlx5e_tstamp *tstamp = container_of(ptp, struct mlx5e_tstamp, ptp_info); struct mlx5e_priv *priv = container_of(tstamp, struct mlx5e_priv, tstamp); u32 in[MLX5_ST_SZ_DW(mtpps_reg)] = {0}; u8 pattern = 0; int pin = -1; int err = 0; if (!MLX5_CAP_GEN(priv->mdev, pps) || !MLX5_CAP_GEN(priv->mdev, pps_modify)) return -EOPNOTSUPP; if (rq->extts.index >= tstamp->ptp_info.n_pins) return -EINVAL; if (on) { pin = ptp_find_pin(tstamp->ptp, PTP_PF_EXTTS, rq->extts.index); if (pin < 0) return -EBUSY; } if (rq->extts.flags & PTP_FALLING_EDGE) pattern = 1; MLX5_SET(mtpps_reg, in, pin, pin); MLX5_SET(mtpps_reg, in, pin_mode, MLX5E_PIN_MODE_IN); MLX5_SET(mtpps_reg, in, pattern, pattern); MLX5_SET(mtpps_reg, in, enable, on); err = mlx5_set_mtpps(priv->mdev, in, sizeof(in)); if (err) return err; return mlx5_set_mtppse(priv->mdev, pin, 0, MLX5E_EVENT_MODE_REPETETIVE & on); }

Contributors

PersonTokensPropCommitsCommitProp
Eugenia Emantayev22488.89%150.00%
Eran Ben Elisha2811.11%150.00%
Total252100.00%2100.00%


static int mlx5e_perout_configure(struct ptp_clock_info *ptp, struct ptp_clock_request *rq, int on) { struct mlx5e_tstamp *tstamp = container_of(ptp, struct mlx5e_tstamp, ptp_info); struct mlx5e_priv *priv = container_of(tstamp, struct mlx5e_priv, tstamp); u32 in[MLX5_ST_SZ_DW(mtpps_reg)] = {0}; u64 nsec_now, nsec_delta, time_stamp; u64 cycles_now, cycles_delta; struct timespec64 ts; unsigned long flags; int pin = -1; s64 ns; if (!MLX5_CAP_GEN(priv->mdev, pps_modify)) return -EOPNOTSUPP; if (rq->perout.index >= tstamp->ptp_info.n_pins) return -EINVAL; if (on) { pin = ptp_find_pin(tstamp->ptp, PTP_PF_PEROUT, rq->perout.index); if (pin < 0) return -EBUSY; } ts.tv_sec = rq->perout.period.sec; ts.tv_nsec = rq->perout.period.nsec; ns = timespec64_to_ns(&ts); if (on) if ((ns >> 1) != 500000000LL) return -EINVAL; ts.tv_sec = rq->perout.start.sec; ts.tv_nsec = rq->perout.start.nsec; ns = timespec64_to_ns(&ts); cycles_now = mlx5_read_internal_timer(tstamp->mdev); write_lock_irqsave(&tstamp->lock, flags); nsec_now = timecounter_cyc2time(&tstamp->clock, cycles_now); nsec_delta = ns - nsec_now; cycles_delta = div64_u64(nsec_delta << tstamp->cycles.shift, tstamp->cycles.mult); write_unlock_irqrestore(&tstamp->lock, flags); time_stamp = cycles_now + cycles_delta; MLX5_SET(mtpps_reg, in, pin, pin); MLX5_SET(mtpps_reg, in, pin_mode, MLX5E_PIN_MODE_OUT); MLX5_SET(mtpps_reg, in, pattern, MLX5E_OUT_PATTERN_PERIODIC); MLX5_SET(mtpps_reg, in, enable, on); MLX5_SET64(mtpps_reg, in, time_stamp, time_stamp); return mlx5_set_mtpps(priv->mdev, in, sizeof(in)); }

Contributors

PersonTokensPropCommitsCommitProp
Eugenia Emantayev382100.00%1100.00%
Total382100.00%1100.00%


static int mlx5e_ptp_enable(struct ptp_clock_info *ptp, struct ptp_clock_request *rq, int on) { switch (rq->type) { case PTP_CLK_REQ_EXTTS: return mlx5e_extts_configure(ptp, rq, on); case PTP_CLK_REQ_PEROUT: return mlx5e_perout_configure(ptp, rq, on); default: return -EOPNOTSUPP; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Eugenia Emantayev61100.00%1100.00%
Total61100.00%1100.00%


static int mlx5e_ptp_verify(struct ptp_clock_info *ptp, unsigned int pin, enum ptp_pin_function func, unsigned int chan) { return (func == PTP_PF_PHYSYNC) ? -EOPNOTSUPP : 0; }

Contributors

PersonTokensPropCommitsCommitProp
Eugenia Emantayev35100.00%1100.00%
Total35100.00%1100.00%

static const struct ptp_clock_info mlx5e_ptp_clock_info = { .owner = THIS_MODULE, .max_adj = 100000000, .n_alarm = 0, .n_ext_ts = 0, .n_per_out = 0, .n_pins = 0, .pps = 0, .adjfreq = mlx5e_ptp_adjfreq, .adjtime = mlx5e_ptp_adjtime, .gettime64 = mlx5e_ptp_gettime, .settime64 = mlx5e_ptp_settime, .enable = NULL, .verify = NULL, };
static void mlx5e_timestamp_init_config(struct mlx5e_tstamp *tstamp) { tstamp->hwtstamp_config.tx_type = HWTSTAMP_TX_OFF; tstamp->hwtstamp_config.rx_filter = HWTSTAMP_FILTER_NONE; }

Contributors

PersonTokensPropCommitsCommitProp
Eugenia Emantayev27100.00%1100.00%
Total27100.00%1100.00%


static int mlx5e_init_pin_config(struct mlx5e_tstamp *tstamp) { int i; tstamp->ptp_info.pin_config = kzalloc(sizeof(*tstamp->ptp_info.pin_config) * tstamp->ptp_info.n_pins, GFP_KERNEL); if (!tstamp->ptp_info.pin_config) return -ENOMEM; tstamp->ptp_info.enable = mlx5e_ptp_enable; tstamp->ptp_info.verify = mlx5e_ptp_verify; for (i = 0; i < tstamp->ptp_info.n_pins; i++) { snprintf(tstamp->ptp_info.pin_config[i].name, sizeof(tstamp->ptp_info.pin_config[i].name), "mlx5_pps%d", i); tstamp->ptp_info.pin_config[i].index = i; tstamp->ptp_info.pin_config[i].func = PTP_PF_NONE; tstamp->ptp_info.pin_config[i].chan = i; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Eugenia Emantayev163100.00%1100.00%
Total163100.00%1100.00%


static void mlx5e_get_pps_caps(struct mlx5e_priv *priv, struct mlx5e_tstamp *tstamp) { u32 out[MLX5_ST_SZ_DW(mtpps_reg)] = {0}; mlx5_query_mtpps(priv->mdev, out, sizeof(out)); tstamp->ptp_info.n_pins = MLX5_GET(mtpps_reg, out, cap_number_of_pps_pins); tstamp->ptp_info.n_ext_ts = MLX5_GET(mtpps_reg, out, cap_max_num_of_pps_in_pins); tstamp->ptp_info.n_per_out = MLX5_GET(mtpps_reg, out, cap_max_num_of_pps_out_pins); tstamp->pps_pin_caps[0] = MLX5_GET(mtpps_reg, out, cap_pin_0_mode); tstamp->pps_pin_caps[1] = MLX5_GET(mtpps_reg, out, cap_pin_1_mode); tstamp->pps_pin_caps[2] = MLX5_GET(mtpps_reg, out, cap_pin_2_mode); tstamp->pps_pin_caps[3] = MLX5_GET(mtpps_reg, out, cap_pin_3_mode); tstamp->pps_pin_caps[4] = MLX5_GET(mtpps_reg, out, cap_pin_4_mode); tstamp->pps_pin_caps[5] = MLX5_GET(mtpps_reg, out, cap_pin_5_mode); tstamp->pps_pin_caps[6] = MLX5_GET(mtpps_reg, out, cap_pin_6_mode); tstamp->pps_pin_caps[7] = MLX5_GET(mtpps_reg, out, cap_pin_7_mode); }

Contributors

PersonTokensPropCommitsCommitProp
Eugenia Emantayev216100.00%1100.00%
Total216100.00%1100.00%


void mlx5e_pps_event_handler(struct mlx5e_priv *priv, struct ptp_clock_event *event) { struct mlx5e_tstamp *tstamp = &priv->tstamp; ptp_clock_event(tstamp->ptp, event); }

Contributors

PersonTokensPropCommitsCommitProp
Eugenia Emantayev34100.00%1100.00%
Total34100.00%1100.00%


void mlx5e_timestamp_init(struct mlx5e_priv *priv) { struct mlx5e_tstamp *tstamp = &priv->tstamp; u64 ns; u64 frac = 0; u32 dev_freq; mlx5e_timestamp_init_config(tstamp); dev_freq = MLX5_CAP_GEN(priv->mdev, device_frequency_khz); if (!dev_freq) { mlx5_core_warn(priv->mdev, "invalid device_frequency_khz, aborting HW clock init\n"); return; } rwlock_init(&tstamp->lock); tstamp->cycles.read = mlx5e_read_internal_timer; tstamp->cycles.shift = MLX5E_CYCLES_SHIFT; tstamp->cycles.mult = clocksource_khz2mult(dev_freq, tstamp->cycles.shift); tstamp->nominal_c_mult = tstamp->cycles.mult; tstamp->cycles.mask = CLOCKSOURCE_MASK(41); tstamp->mdev = priv->mdev; timecounter_init(&tstamp->clock, &tstamp->cycles, ktime_to_ns(ktime_get_real())); /* Calculate period in seconds to call the overflow watchdog - to make * sure counter is checked at least once every wrap around. */ ns = cyclecounter_cyc2ns(&tstamp->cycles, tstamp->cycles.mask, frac, &frac); do_div(ns, NSEC_PER_SEC / 2 / HZ); tstamp->overflow_period = ns; INIT_DELAYED_WORK(&tstamp->overflow_work, mlx5e_timestamp_overflow); if (tstamp->overflow_period) schedule_delayed_work(&tstamp->overflow_work, 0); else mlx5_core_warn(priv->mdev, "invalid overflow period, overflow_work is not scheduled\n"); /* Configure the PHC */ tstamp->ptp_info = mlx5e_ptp_clock_info; snprintf(tstamp->ptp_info.name, 16, "mlx5 ptp"); /* Initialize 1PPS data structures */ #define MAX_PIN_NUM 8 tstamp->pps_pin_caps = kzalloc(sizeof(u8) * MAX_PIN_NUM, GFP_KERNEL); if (tstamp->pps_pin_caps) { if (MLX5_CAP_GEN(priv->mdev, pps)) mlx5e_get_pps_caps(priv, tstamp); if (tstamp->ptp_info.n_pins) mlx5e_init_pin_config(tstamp); } else { mlx5_core_warn(priv->mdev, "1PPS initialization failed\n"); } tstamp->ptp = ptp_clock_register(&tstamp->ptp_info, &priv->mdev->pdev->dev); if (IS_ERR(tstamp->ptp)) { mlx5_core_warn(priv->mdev, "ptp_clock_register failed %ld\n", PTR_ERR(tstamp->ptp)); tstamp->ptp = NULL; } }

Contributors

PersonTokensPropCommitsCommitProp
Eran Ben Elisha25568.18%250.00%
Eugenia Emantayev11831.55%125.00%
Nico Pitre10.27%125.00%
Total374100.00%4100.00%


void mlx5e_timestamp_cleanup(struct mlx5e_priv *priv) { struct mlx5e_tstamp *tstamp = &priv->tstamp; if (!MLX5_CAP_GEN(priv->mdev, device_frequency_khz)) return; if (priv->tstamp.ptp) { ptp_clock_unregister(priv->tstamp.ptp); priv->tstamp.ptp = NULL; } kfree(tstamp->pps_pin_caps); kfree(tstamp->ptp_info.pin_config); cancel_delayed_work_sync(&tstamp->overflow_work); }

Contributors

PersonTokensPropCommitsCommitProp
Eran Ben Elisha6880.95%266.67%
Eugenia Emantayev1619.05%133.33%
Total84100.00%3100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Eugenia Emantayev146654.60%111.11%
Eran Ben Elisha116643.43%333.33%
Shaker Daibes341.27%222.22%
Tariq Toukan170.63%111.11%
Thomas Gleixner10.04%111.11%
Nico Pitre10.04%111.11%
Total2685100.00%9100.00%
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.