mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 19:00:25 +00:00
![Yangbo Lu](/assets/img/avatar_default.png)
Add kernel API ptp_get_vclocks_index() to get all ptp vclocks index on pclock. This is preparation for supporting ptp vclocks info query through ethtool. Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
131 lines
3.7 KiB
C
131 lines
3.7 KiB
C
/* 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>
|
|
|
|
#define PTP_MAX_TIMESTAMPS 128
|
|
#define PTP_BUF_TIMESTAMPS 30
|
|
#define PTP_DEFAULT_MAX_VCLOCKS 20
|
|
|
|
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 clocks.map */
|
|
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;
|
|
unsigned int max_vclocks;
|
|
unsigned int n_vclocks;
|
|
int *vclock_index;
|
|
struct mutex n_vclocks_mux; /* protect concurrent n_vclocks access */
|
|
bool is_virtual_clock;
|
|
};
|
|
|
|
#define info_to_vclock(d) container_of((d), struct ptp_vclock, info)
|
|
#define cc_to_vclock(d) container_of((d), struct ptp_vclock, cc)
|
|
#define dw_to_vclock(d) container_of((d), struct ptp_vclock, refresh_work)
|
|
|
|
struct ptp_vclock {
|
|
struct ptp_clock *pclock;
|
|
struct ptp_clock_info info;
|
|
struct ptp_clock *clock;
|
|
struct cyclecounter cc;
|
|
struct timecounter tc;
|
|
spinlock_t lock; /* protects tc/cc */
|
|
};
|
|
|
|
/*
|
|
* 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;
|
|
}
|
|
|
|
/* Check if ptp virtual clock is in use */
|
|
static inline bool ptp_vclock_in_use(struct ptp_clock *ptp)
|
|
{
|
|
bool in_use = false;
|
|
|
|
if (mutex_lock_interruptible(&ptp->n_vclocks_mux))
|
|
return true;
|
|
|
|
if (!ptp->is_virtual_clock && ptp->n_vclocks)
|
|
in_use = true;
|
|
|
|
mutex_unlock(&ptp->n_vclocks_mux);
|
|
|
|
return in_use;
|
|
}
|
|
|
|
extern 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 *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);
|
|
|
|
__poll_t 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);
|
|
|
|
struct ptp_vclock *ptp_vclock_register(struct ptp_clock *pclock);
|
|
void ptp_vclock_unregister(struct ptp_vclock *vclock);
|
|
#endif
|