linux/drivers/net/dsa/hirschmann/hellcreek_hwtstamp.c

// SPDX-License-Identifier: (GPL-2.0 OR MIT)
/*
 * DSA driver for:
 * Hirschmann Hellcreek TSN switch.
 *
 * Copyright (C) 2019,2020 Hochschule Offenburg
 * Copyright (C) 2019,2020 Linutronix GmbH
 * Authors: Kamil Alkhouri <[email protected]>
 *	    Kurt Kanzenbach <[email protected]>
 */

#include <linux/ptp_classify.h>

#include "hellcreek.h"
#include "hellcreek_hwtstamp.h"
#include "hellcreek_ptp.h"

int hellcreek_get_ts_info(struct dsa_switch *ds, int port,
			  struct kernel_ethtool_ts_info *info)
{ … }

/* Enabling/disabling TX and RX HW timestamping for different PTP messages is
 * not available in the switch. Thus, this function only serves as a check if
 * the user requested what is actually available or not
 */
static int hellcreek_set_hwtstamp_config(struct hellcreek *hellcreek, int port,
					 struct hwtstamp_config *config)
{ … }

int hellcreek_port_hwtstamp_set(struct dsa_switch *ds, int port,
				struct ifreq *ifr)
{ … }

int hellcreek_port_hwtstamp_get(struct dsa_switch *ds, int port,
				struct ifreq *ifr)
{ … }

/* Returns a pointer to the PTP header if the caller should time stamp, or NULL
 * if the caller should not.
 */
static struct ptp_header *hellcreek_should_tstamp(struct hellcreek *hellcreek,
						  int port, struct sk_buff *skb,
						  unsigned int type)
{ … }

static u64 hellcreek_get_reserved_field(const struct ptp_header *hdr)
{ … }

static void hellcreek_clear_reserved_field(struct ptp_header *hdr)
{ … }

static int hellcreek_ptp_hwtstamp_available(struct hellcreek *hellcreek,
					    unsigned int ts_reg)
{ … }

/* Get nanoseconds timestamp from timestamping unit */
static u64 hellcreek_ptp_hwtstamp_read(struct hellcreek *hellcreek,
				       unsigned int ts_reg)
{ … }

static int hellcreek_txtstamp_work(struct hellcreek *hellcreek,
				   struct hellcreek_port_hwtstamp *ps, int port)
{ … }

static void hellcreek_get_rxts(struct hellcreek *hellcreek,
			       struct hellcreek_port_hwtstamp *ps,
			       struct sk_buff *skb, struct sk_buff_head *rxq,
			       int port)
{ … }

static void hellcreek_rxtstamp_work(struct hellcreek *hellcreek,
				    struct hellcreek_port_hwtstamp *ps,
				    int port)
{ … }

long hellcreek_hwtstamp_work(struct ptp_clock_info *ptp)
{ … }

void hellcreek_port_txtstamp(struct dsa_switch *ds, int port,
			     struct sk_buff *skb)
{ … }

bool hellcreek_port_rxtstamp(struct dsa_switch *ds, int port,
			     struct sk_buff *skb, unsigned int type)
{ … }

static void hellcreek_hwtstamp_port_setup(struct hellcreek *hellcreek, int port)
{ … }

int hellcreek_hwtstamp_setup(struct hellcreek *hellcreek)
{ … }

void hellcreek_hwtstamp_free(struct hellcreek *hellcreek)
{ … }