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Message-Id: <20240911-devel-anna-maria-b4-timers-ptp-ntp-v1-16-2d52f4e13476@linutronix.de>
Date: Wed, 11 Sep 2024 15:17:52 +0200
From: Anna-Maria Behnsen <anna-maria@...utronix.de>
To: John Stultz <jstultz@...gle.com>,
Frederic Weisbecker <frederic@...nel.org>,
Thomas Gleixner <tglx@...utronix.de>
Cc: linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
Miroslav Lichvar <mlichvar@...hat.com>,
Richard Cochran <richardcochran@...il.com>,
Christopher S Hall <christopher.s.hall@...el.com>,
Anna-Maria Behnsen <anna-maria@...utronix.de>
Subject: [PATCH 16/21] ntp: Move pps_ft into ntp_data
From: Thomas Gleixner <tglx@...utronix.de>
Continue the conversion from static variables to struct based data.
No functional change.
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: Anna-Maria Behnsen <anna-maria@...utronix.de>
---
kernel/time/ntp.c | 36 +++++++++++++++++++-----------------
1 file changed, 19 insertions(+), 17 deletions(-)
diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c
index 35cca57e017e..22fece642c61 100644
--- a/kernel/time/ntp.c
+++ b/kernel/time/ntp.c
@@ -41,6 +41,7 @@
* @ntp_next_leap_sec: Second value of the next pending leapsecond, or TIME64_MAX if no leap
*
* @pps_valid: PPS signal watchdog counter
+ * @pps_tf: PPS phase median filter
*
* Protected by the timekeeping locks.
*/
@@ -61,6 +62,7 @@ struct ntp_data {
time64_t ntp_next_leap_sec;
#ifdef CONFIG_NTP_PPS
int pps_valid;
+ long pps_tf[3];
#endif
};
@@ -96,7 +98,6 @@ static struct ntp_data tk_ntp_data = {
intervals to decrease it */
#define PPS_MAXWANDER 100000 /* max PPS freq wander (ns/s) */
-static long pps_tf[3]; /* phase median filter */
static long pps_jitter; /* current jitter (ns) */
static struct timespec64 pps_fbase; /* beginning of the last freq interval */
static int pps_shift; /* current interval duration (s) (shift) */
@@ -134,13 +135,14 @@ static inline void pps_reset_freq_interval(void)
/**
* pps_clear - Clears the PPS state variables
+ * @ntpdata: Pointer to ntp data
*/
-static inline void pps_clear(void)
+static inline void pps_clear(struct ntp_data *ntpdata)
{
pps_reset_freq_interval();
- pps_tf[0] = 0;
- pps_tf[1] = 0;
- pps_tf[2] = 0;
+ ntpdata->pps_tf[0] = 0;
+ ntpdata->pps_tf[1] = 0;
+ ntpdata->pps_tf[2] = 0;
pps_fbase.tv_sec = pps_fbase.tv_nsec = 0;
pps_freq = 0;
}
@@ -156,7 +158,7 @@ static inline void pps_dec_valid(struct ntp_data *ntpdata)
} else {
ntpdata->time_status &= ~(STA_PPSSIGNAL | STA_PPSJITTER |
STA_PPSWANDER | STA_PPSERROR);
- pps_clear();
+ pps_clear(ntpdata);
}
}
@@ -211,7 +213,7 @@ static inline s64 ntp_offset_chunk(struct ntp_data *ntpdata, s64 offset)
}
static inline void pps_reset_freq_interval(void) {}
-static inline void pps_clear(void) {}
+static inline void pps_clear(struct ntp_data *ntpdata) {}
static inline void pps_dec_valid(struct ntp_data *ntpdata) {}
static inline void pps_set_freq(s64 freq) {}
@@ -337,7 +339,7 @@ static void __ntp_clear(struct ntp_data *ntpdata)
ntpdata->ntp_next_leap_sec = TIME64_MAX;
/* Clear PPS state variables */
- pps_clear();
+ pps_clear(ntpdata);
}
/**
@@ -862,22 +864,22 @@ static inline struct pps_normtime pps_normalize_ts(struct timespec64 ts)
}
/* Get current phase correction and jitter */
-static inline long pps_phase_filter_get(long *jitter)
+static inline long pps_phase_filter_get(struct ntp_data *ntpdata, long *jitter)
{
- *jitter = pps_tf[0] - pps_tf[1];
+ *jitter = ntpdata->pps_tf[0] - ntpdata->pps_tf[1];
if (*jitter < 0)
*jitter = -*jitter;
/* TODO: test various filters */
- return pps_tf[0];
+ return ntpdata->pps_tf[0];
}
/* Add the sample to the phase filter */
-static inline void pps_phase_filter_add(long err)
+static inline void pps_phase_filter_add(struct ntp_data *ntpdata, long err)
{
- pps_tf[2] = pps_tf[1];
- pps_tf[1] = pps_tf[0];
- pps_tf[0] = err;
+ ntpdata->pps_tf[2] = ntpdata->pps_tf[1];
+ ntpdata->pps_tf[1] = ntpdata->pps_tf[0];
+ ntpdata->pps_tf[0] = err;
}
/*
@@ -980,8 +982,8 @@ static void hardpps_update_phase(struct ntp_data *ntpdata, long error)
long jitter;
/* Add the sample to the median filter */
- pps_phase_filter_add(correction);
- correction = pps_phase_filter_get(&jitter);
+ pps_phase_filter_add(ntpdata, correction);
+ correction = pps_phase_filter_get(ntpdata, &jitter);
/*
* Nominal jitter is due to PPS signal noise. If it exceeds the
--
2.39.2
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