From: Yangbo Lu <yangbo.lu@nxp.com>
To: netdev@vger.kernel.org
Cc: Yangbo Lu <yangbo.lu@nxp.com>,
linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org,
mptcp@lists.linux.dev, Richard Cochran <richardcochran@gmail.com>,
"David S . Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Mat Martineau <mathew.j.martineau@linux.intel.com>,
Matthieu Baerts <matthieu.baerts@tessares.net>,
Shuah Khan <shuah@kernel.org>, Michal Kubecek <mkubecek@suse.cz>,
Florian Fainelli <f.fainelli@gmail.com>,
Andrew Lunn <andrew@lunn.ch>, Rui Sousa <rui.sousa@nxp.com>,
Sebastien Laveze <sebastien.laveze@nxp.com>
Subject: [net-next, v3, 06/10] ptp: add kernel API ptp_convert_timestamp()
Date: Tue, 15 Jun 2021 17:45:13 +0800 [thread overview]
Message-ID: <20210615094517.48752-7-yangbo.lu@nxp.com> (raw)
In-Reply-To: <20210615094517.48752-1-yangbo.lu@nxp.com>
Add kernel API ptp_convert_timestamp() to convert raw hardware timestamp
to a specified ptp vclock time.
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
---
Changes for v2:
- Split from v1 patch #1 and #2.
- Fixed build warning.
Changes for v3:
- Converted HW timestamps to PHC bound, instead of previous
binding domain value to PHC idea.
---
drivers/ptp/ptp_vclock.c | 34 ++++++++++++++++++++++++++++++++
include/linux/ptp_clock_kernel.h | 13 ++++++++++++
2 files changed, 47 insertions(+)
diff --git a/drivers/ptp/ptp_vclock.c b/drivers/ptp/ptp_vclock.c
index 8944b4fe32d8..65ca31916691 100644
--- a/drivers/ptp/ptp_vclock.c
+++ b/drivers/ptp/ptp_vclock.c
@@ -176,3 +176,37 @@ int ptp_get_vclocks_index(int pclock_index, int *vclock_index)
return num;
}
EXPORT_SYMBOL(ptp_get_vclocks_index);
+
+void ptp_convert_timestamp(struct skb_shared_hwtstamps *hwtstamps,
+ int vclock_index)
+{
+ char name[PTP_CLOCK_NAME_LEN] = "";
+ struct ptp_vclock *vclock;
+ struct ptp_clock *ptp;
+ unsigned long flags;
+ struct device *dev;
+ u64 ns;
+
+ snprintf(name, PTP_CLOCK_NAME_LEN, "ptp%d", vclock_index);
+ dev = class_find_device_by_name(ptp_class, name);
+ if (!dev)
+ return;
+
+ ptp = dev_get_drvdata(dev);
+ if (!ptp->vclock_flag) {
+ put_device(dev);
+ return;
+ }
+
+ vclock = info_to_vclock(ptp->info);
+
+ ns = ktime_to_ns(hwtstamps->hwtstamp);
+
+ spin_lock_irqsave(&vclock->lock, flags);
+ ns = timecounter_cyc2time(&vclock->tc, ns);
+ spin_unlock_irqrestore(&vclock->lock, flags);
+
+ put_device(dev);
+ hwtstamps->hwtstamp = ns_to_ktime(ns);
+}
+EXPORT_SYMBOL(ptp_convert_timestamp);
diff --git a/include/linux/ptp_clock_kernel.h b/include/linux/ptp_clock_kernel.h
index 37f49d3e761e..b9414fc19249 100644
--- a/include/linux/ptp_clock_kernel.h
+++ b/include/linux/ptp_clock_kernel.h
@@ -12,6 +12,7 @@
#include <linux/pps_kernel.h>
#include <linux/ptp_clock.h>
#include <linux/timecounter.h>
+#include <linux/skbuff.h>
#define PTP_CLOCK_NAME_LEN 32
/**
@@ -316,6 +317,15 @@ void ptp_cancel_worker_sync(struct ptp_clock *ptp);
*/
int ptp_get_vclocks_index(int pclock_index, int *vclock_index);
+/**
+ * ptp_convert_timestamp() - convert timestamp to a ptp vclock time
+ *
+ * @hwtstamps: skb_shared_hwtstamps structure pointer
+ * @vclock_index: phc index of ptp vclock.
+ */
+void ptp_convert_timestamp(struct skb_shared_hwtstamps *hwtstamps,
+ int vclock_index);
+
#else
static inline struct ptp_clock *ptp_clock_register(struct ptp_clock_info *info,
struct device *parent)
@@ -337,6 +347,9 @@ static inline void ptp_cancel_worker_sync(struct ptp_clock *ptp)
{ }
static int ptp_get_vclocks_index(int pclock_index, int *vclock_index)
{ return 0; }
+static void ptp_convert_timestamp(struct skb_shared_hwtstamps *hwtstamps,
+ int vclock_index)
+{ }
#endif
--
2.25.1
next prev parent reply other threads:[~2021-06-15 9:36 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-15 9:45 [net-next, v3, 00/10] ptp: support virtual clocks and timestamping Yangbo Lu
2021-06-15 9:45 ` [net-next, v3, 01/10] ptp: add ptp virtual clock driver framework Yangbo Lu
2021-06-17 17:32 ` Richard Cochran
2021-06-22 10:17 ` Y.b. Lu
2021-06-15 9:45 ` [net-next, v3, 02/10] ptp: support ptp physical/virtual clocks conversion Yangbo Lu
2021-06-17 17:42 ` Richard Cochran
2021-06-22 10:18 ` Y.b. Lu
2021-06-17 18:27 ` Richard Cochran
2021-06-22 10:35 ` Y.b. Lu
2021-06-25 11:09 ` Y.b. Lu
2021-06-19 4:06 ` Richard Cochran
2021-06-22 10:39 ` Y.b. Lu
2021-06-15 9:45 ` [net-next, v3, 03/10] ptp: track available ptp vclocks information Yangbo Lu
2021-06-15 9:45 ` [net-next, v3, 04/10] ptp: add kernel API ptp_get_vclocks_index() Yangbo Lu
2021-06-15 9:45 ` [net-next, v3, 05/10] ethtool: add a new command for getting PHC virtual clocks Yangbo Lu
2021-06-15 19:49 ` Jakub Kicinski
2021-06-22 10:10 ` Y.b. Lu
2021-06-15 23:24 ` Michal Kubecek
2021-06-22 10:10 ` Y.b. Lu
2021-06-15 9:45 ` Yangbo Lu [this message]
2021-06-15 9:45 ` [net-next, v3, 07/10] net: sock: extend SO_TIMESTAMPING for PHC binding Yangbo Lu
2021-06-16 1:00 ` Mat Martineau
2021-06-22 10:14 ` Y.b. Lu
2021-06-16 10:27 ` kernel test robot
2021-06-16 10:39 ` kernel test robot
2021-06-15 9:45 ` [net-next, v3, 08/10] net: socket: support hardware timestamp conversion to PHC bound Yangbo Lu
2021-06-15 9:45 ` [net-next, v3, 09/10] selftests/net: timestamping: support binding PHC Yangbo Lu
2021-06-15 9:45 ` [net-next, v3, 10/10] MAINTAINERS: add entry for PTP virtual clock driver Yangbo Lu
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