From: Miroslav Lichvar <mlichvar@redhat•com>
To: netdev@vger•kernel.org
Cc: Miroslav Lichvar <mlichvar@redhat•com>,
Yangbo Lu <yangbo.lu@nxp•com>,
Richard Cochran <richardcochran@gmail•com>
Subject: [PATCH net-next 4/5] ptp: add getcrosststamp() to virtual clocks.
Date: Thu, 27 Jan 2022 12:45:35 +0100 [thread overview]
Message-ID: <20220127114536.1121765-5-mlichvar@redhat.com> (raw)
In-Reply-To: <20220127114536.1121765-1-mlichvar@redhat.com>
If the physical clock supports cross timestamping (it has the
getcrosststamp() function), provide a wrapper in the virtual clock to
enable cross timestamping.
This adds support for the PTP_SYS_OFFSET_PRECISE ioctl.
Signed-off-by: Miroslav Lichvar <mlichvar@redhat•com>
Cc: Yangbo Lu <yangbo.lu@nxp•com>
Cc: Richard Cochran <richardcochran@gmail•com>
---
drivers/ptp/ptp_vclock.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/drivers/ptp/ptp_vclock.c b/drivers/ptp/ptp_vclock.c
index 2f0b46386176..cb179a3ea508 100644
--- a/drivers/ptp/ptp_vclock.c
+++ b/drivers/ptp/ptp_vclock.c
@@ -95,6 +95,28 @@ static int ptp_vclock_settime(struct ptp_clock_info *ptp,
return 0;
}
+static int ptp_vclock_getcrosststamp(struct ptp_clock_info *ptp,
+ struct system_device_crosststamp *xtstamp)
+{
+ struct ptp_vclock *vclock = info_to_vclock(ptp);
+ struct ptp_clock *pptp = vclock->pclock;
+ unsigned long flags;
+ int err;
+ u64 ns;
+
+ err = pptp->info->getcrosststamp(pptp->info, xtstamp);
+ if (err)
+ return err;
+
+ spin_lock_irqsave(&vclock->lock, flags);
+ ns = timecounter_cyc2time(&vclock->tc, ktime_to_ns(xtstamp->device));
+ spin_unlock_irqrestore(&vclock->lock, flags);
+
+ xtstamp->device = ns_to_ktime(ns);
+
+ return 0;
+}
+
static long ptp_vclock_refresh(struct ptp_clock_info *ptp)
{
struct ptp_vclock *vclock = info_to_vclock(ptp);
@@ -150,6 +172,8 @@ struct ptp_vclock *ptp_vclock_register(struct ptp_clock *pclock)
vclock->info.gettimex64 = ptp_vclock_gettimex;
else
vclock->info.gettime64 = ptp_vclock_gettime;
+ if (pclock->info->getcrosststamp)
+ vclock->info.getcrosststamp = ptp_vclock_getcrosststamp;
vclock->cc = ptp_vclock_cc;
snprintf(vclock->info.name, PTP_CLOCK_NAME_LEN, "ptp%d_virt",
--
2.34.1
next prev parent reply other threads:[~2022-01-27 11:45 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-27 11:45 [PATCH net-next 0/5] Virtual PTP clock improvements and fix Miroslav Lichvar
2022-01-27 11:45 ` [PATCH net-next 1/5] ptp: unregister virtual clocks when unregistering physical clock Miroslav Lichvar
2022-01-27 23:58 ` Vinicius Costa Gomes
2022-01-31 10:07 ` Miroslav Lichvar
2022-01-31 12:41 ` Vladimir Oltean
2022-01-27 11:45 ` [PATCH net-next 2/5] ptp: increase maximum adjustment of virtual clocks Miroslav Lichvar
2022-01-27 11:45 ` [PATCH net-next 3/5] ptp: add gettimex64() to " Miroslav Lichvar
2022-01-27 11:45 ` Miroslav Lichvar [this message]
2022-01-27 11:45 ` [PATCH net-next 5/5] ptp: start virtual clocks at current system time Miroslav Lichvar
2022-01-27 22:01 ` Richard Cochran
2022-01-31 10:21 ` Miroslav Lichvar
2022-01-31 16:32 ` Richard Cochran
2022-02-01 8:42 ` Miroslav Lichvar
2022-02-01 19:10 ` Richard Cochran
2022-02-01 19:03 ` Richard Cochran
2022-02-02 9:07 ` Miroslav Lichvar
2022-01-27 22:02 ` [PATCH net-next 0/5] Virtual PTP clock improvements and fix Richard Cochran
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