linux/drivers/ptp/ptp_private.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * PTP 1588 clock support - private declarations for the core module.
 *
 * Copyright (C) 2010 OMICRON electronics GmbH
 */
#ifndef _PTP_PRIVATE_H_
#define _PTP_PRIVATE_H_

#include <linux/cdev.h>
#include <linux/device.h>
#include <linux/kthread.h>
#include <linux/mutex.h>
#include <linux/posix-clock.h>
#include <linux/ptp_clock.h>
#include <linux/ptp_clock_kernel.h>
#include <linux/time.h>
#include <linux/list.h>
#include <linux/bitmap.h>
#include <linux/debugfs.h>

#define PTP_MAX_TIMESTAMPS …
#define PTP_BUF_TIMESTAMPS …
#define PTP_DEFAULT_MAX_VCLOCKS …
#define PTP_MAX_CHANNELS …

struct timestamp_event_queue { … };

struct ptp_clock { … };

#define info_to_vclock(d) …
#define cc_to_vclock(d) …
#define dw_to_vclock(d) …

struct ptp_vclock { … };

/*
 * The function queue_cnt() is safe for readers to call without
 * holding q->lock. Readers use this function to verify that the queue
 * is nonempty before proceeding with a dequeue operation. The fact
 * that a writer might concurrently increment the tail does not
 * matter, since the queue remains nonempty nonetheless.
 */
static inline int queue_cnt(const struct timestamp_event_queue *q)
{ … }

/* Check if ptp virtual clock is in use */
static inline bool ptp_vclock_in_use(struct ptp_clock *ptp)
{ … }

/* Check if ptp clock shall be free running */
static inline bool ptp_clock_freerun(struct ptp_clock *ptp)
{ … }

extern const struct class ptp_class;

/*
 * see ptp_chardev.c
 */

/* caller must hold pincfg_mux */
int ptp_set_pinfunc(struct ptp_clock *ptp, unsigned int pin,
		    enum ptp_pin_function func, unsigned int chan);

long ptp_ioctl(struct posix_clock_context *pccontext, unsigned int cmd,
	       unsigned long arg);

int ptp_open(struct posix_clock_context *pccontext, fmode_t fmode);

int ptp_release(struct posix_clock_context *pccontext);

ssize_t ptp_read(struct posix_clock_context *pccontext, uint flags, char __user *buf,
		 size_t cnt);

__poll_t ptp_poll(struct posix_clock_context *pccontext, struct file *fp,
		  poll_table *wait);

/*
 * see ptp_sysfs.c
 */

extern const struct attribute_group *ptp_groups[];

int ptp_populate_pin_groups(struct ptp_clock *ptp);
void ptp_cleanup_pin_groups(struct ptp_clock *ptp);

struct ptp_vclock *ptp_vclock_register(struct ptp_clock *pclock);
void ptp_vclock_unregister(struct ptp_vclock *vclock);
#endif