linux/drivers/net/ethernet/qlogic/qed/qed_ptp.c

// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
/* QLogic qed NIC Driver
 * Copyright (c) 2015-2017  QLogic Corporation
 * Copyright (c) 2019-2020 Marvell International Ltd.
 */

#include <linux/types.h>
#include "qed.h"
#include "qed_dev_api.h"
#include "qed_hw.h"
#include "qed_l2.h"
#include "qed_mcp.h"
#include "qed_ptp.h"
#include "qed_reg_addr.h"

/* 16 nano second time quantas to wait before making a Drift adjustment */
#define QED_DRIFT_CNTR_TIME_QUANTA_SHIFT …
/* Nano seconds to add/subtract when making a Drift adjustment */
#define QED_DRIFT_CNTR_ADJUSTMENT_SHIFT …
/* Add/subtract the Adjustment_Value when making a Drift adjustment */
#define QED_DRIFT_CNTR_DIRECTION_SHIFT …
#define QED_TIMESTAMP_MASK …
/* Param mask for Hardware to detect/timestamp the L2/L4 unicast PTP packets */
#define QED_PTP_UCAST_PARAM_MASK …

static enum qed_resc_lock qed_ptcdev_to_resc(struct qed_hwfn *p_hwfn)
{ … }

static int qed_ptp_res_lock(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
{ … }

static int qed_ptp_res_unlock(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
{ … }

/* Read Rx timestamp */
static int qed_ptp_hw_read_rx_ts(struct qed_dev *cdev, u64 *timestamp)
{ … }

/* Read Tx timestamp */
static int qed_ptp_hw_read_tx_ts(struct qed_dev *cdev, u64 *timestamp)
{ … }

/* Read Phy Hardware Clock */
static int qed_ptp_hw_read_cc(struct qed_dev *cdev, u64 *phc_cycles)
{ … }

/* Filter PTP protocol packets that need to be timestamped */
static int qed_ptp_hw_cfg_filters(struct qed_dev *cdev,
				  enum qed_ptp_filter_type rx_type,
				  enum qed_ptp_hwtstamp_tx_type tx_type)
{ … }

/* Adjust the HW clock by a rate given in parts-per-billion (ppb) units.
 * FW/HW accepts the adjustment value in terms of 3 parameters:
 *   Drift period - adjustment happens once in certain number of nano seconds.
 *   Drift value - time is adjusted by a certain value, for example by 5 ns.
 *   Drift direction - add or subtract the adjustment value.
 * The routine translates ppb into the adjustment triplet in an optimal manner.
 */
static int qed_ptp_hw_adjfreq(struct qed_dev *cdev, s32 ppb)
{ … }

static int qed_ptp_hw_enable(struct qed_dev *cdev)
{ … }

static int qed_ptp_hw_disable(struct qed_dev *cdev)
{ … }

const struct qed_eth_ptp_ops qed_ptp_ops_pass = …;