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Release 4.14 drivers/ptp/ptp_private.h

Directory: drivers/ptp
 * PTP 1588 clock support - private declarations for the core module.
 * Copyright (C) 2010 OMICRON electronics GmbH
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  GNU General Public License for more details.
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#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>



struct timestamp_event_queue {
struct ptp_extts_event buf[PTP_MAX_TIMESTAMPS];
int head;
int tail;
spinlock_t lock;

struct ptp_clock {
struct posix_clock clock;
struct device *dev;
struct ptp_clock_info *info;
dev_t devid;
int index; /* index into */
struct pps_device *pps_source;
long dialed_frequency; /* remembers the frequency adjustment */
struct timestamp_event_queue tsevq; /* simple fifo for time stamps */
struct mutex tsevq_mux; /* one process at a time reading the fifo */
struct mutex pincfg_mux; /* protect concurrent info->pin_config access */
wait_queue_head_t tsev_wq;
int defunct; /* tells readers to go away when clock is being removed */
struct device_attribute *pin_dev_attr;
struct attribute **pin_attr;
struct attribute_group pin_attr_group;
	/* 1st entry is a pointer to the real group, 2nd is NULL terminator */
const struct attribute_group *pin_attr_groups[2];
struct kthread_worker *kworker;
struct kthread_delayed_work aux_work;

 * 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(struct timestamp_event_queue *q) { int cnt = q->tail - q->head; return cnt < 0 ? PTP_MAX_TIMESTAMPS + cnt : cnt; }


Richard Cochran34100.00%1100.00%

/* * 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 *pc, unsigned int cmd, unsigned long arg); int ptp_open(struct posix_clock *pc, fmode_t fmode); ssize_t ptp_read(struct posix_clock *pc, uint flags, char __user *buf, size_t cnt); uint ptp_poll(struct posix_clock *pc, 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); #endif

Overall Contributors

Richard Cochran27690.49%457.14%
Dmitry Torokhov134.26%114.29%
Grygorii Strashko123.93%114.29%
Greg Kroah-Hartman41.31%114.29%
Directory: drivers/ptp
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