linux-kernel - [RFC PATCH 7/9] ptp: extend input argument for getcrosstimestamp API

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Message-Id: <20200210084906.24870-8-jianyong.wu@arm.com>
Date:   Mon, 10 Feb 2020 16:49:04 +0800
From:   Jianyong Wu <jianyong.wu@....com>
To:     netdev@...r.kernel.org, yangbo.lu@....com, john.stultz@...aro.org,
        tglx@...utronix.de, pbonzini@...hat.com,
        sean.j.christopherson@...el.com, maz@...nel.org,
        richardcochran@...il.com, Mark.Rutland@....com, will@...nel.org,
        suzuki.poulose@....com, steven.price@....com
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        kvmarm@...ts.cs.columbia.edu, kvm@...r.kernel.org,
        Steve.Capper@....com, Kaly.Xin@....com, justin.he@....com,
        jianyong.wu@....com, nd@....com
Subject: [RFC PATCH 7/9] ptp: extend input argument for getcrosstimestamp API

sometimes we may need tell getcrosstimestamp call back how to perform
itself. Extending input arguments for getcrosstimestamp API to offer more
exquisite control for the operation.

Signed-off-by: Jianyong Wu <jianyong.wu@....com>
---
 drivers/clocksource/arm_arch_timer.c    | 2 +-
 drivers/net/ethernet/intel/e1000e/ptp.c | 3 ++-
 drivers/ptp/ptp_chardev.c               | 2 +-
 drivers/ptp/ptp_kvm.h                   | 2 +-
 drivers/ptp/ptp_kvm_x86.c               | 2 +-
 include/linux/ptp_clock_kernel.h        | 3 ++-
 6 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index 4e57ab66165c..b1bc8bd198c2 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -1629,7 +1629,7 @@ TIMER_ACPI_DECLARE(arch_timer, ACPI_SIG_GTDT, arch_timer_acpi_init);
 #if IS_ENABLED(CONFIG_PTP_1588_CLOCK_KVM)
 #include <linux/arm-smccc.h>
 int kvm_arch_ptp_get_crosststamp(unsigned long *cycle, struct timespec64 *ts,
-			      struct clocksource **cs)
+				 struct clocksource **cs, long *ctx)
 {
 	struct arm_smccc_res hvc_res;
 	ktime_t ktime_overall;
diff --git a/drivers/net/ethernet/intel/e1000e/ptp.c b/drivers/net/ethernet/intel/e1000e/ptp.c
index eaa5a0fb99f0..7a45d9634962 100644
--- a/drivers/net/ethernet/intel/e1000e/ptp.c
+++ b/drivers/net/ethernet/intel/e1000e/ptp.c
@@ -150,7 +150,8 @@ static int e1000e_phc_get_syncdevicetime(ktime_t *device,
  * clock values in ns.
  **/
 static int e1000e_phc_getcrosststamp(struct ptp_clock_info *ptp,
-				     struct system_device_crosststamp *xtstamp)
+				     struct system_device_crosststamp *xtstamp,
+				     NULL)
 {
 	struct e1000_adapter *adapter = container_of(ptp, struct e1000_adapter,
 						     ptp_clock_info);
diff --git a/drivers/ptp/ptp_chardev.c b/drivers/ptp/ptp_chardev.c
index 9d72ab593f13..09c3f1e5382d 100644
--- a/drivers/ptp/ptp_chardev.c
+++ b/drivers/ptp/ptp_chardev.c
@@ -226,7 +226,7 @@ long ptp_ioctl(struct posix_clock *pc, unsigned int cmd, unsigned long arg)
 			err = -EOPNOTSUPP;
 			break;
 		}
-		err = ptp->info->getcrosststamp(ptp->info, &xtstamp);
+		err = ptp->info->getcrosststamp(ptp->info, &xtstamp, NULL);
 		if (err)
 			break;
 
diff --git a/drivers/ptp/ptp_kvm.h b/drivers/ptp/ptp_kvm.h
index 4bf1802bbeb8..ccceacbe8398 100644
--- a/drivers/ptp/ptp_kvm.h
+++ b/drivers/ptp/ptp_kvm.h
@@ -8,4 +8,4 @@
 int kvm_arch_ptp_init(void);
 int kvm_arch_ptp_get_clock(struct timespec64 *ts);
 int kvm_arch_ptp_get_crosststamp(unsigned long *cycle,
-		struct timespec64 *tspec, void *cs);
+		struct timespec64 *tspec, struct clocksource **cs, long *ctx);
diff --git a/drivers/ptp/ptp_kvm_x86.c b/drivers/ptp/ptp_kvm_x86.c
index 6c891d7299c6..ff95d2791078 100644
--- a/drivers/ptp/ptp_kvm_x86.c
+++ b/drivers/ptp/ptp_kvm_x86.c
@@ -53,7 +53,7 @@ int kvm_arch_ptp_get_clock(struct timespec64 *ts)
 }
 
 int kvm_arch_ptp_get_crosststamp(unsigned long *cycle, struct timespec64 *tspec,
-			      struct clocksource **cs)
+			      struct clocksource **cs, void *ctx)
 {
 	unsigned long ret;
 	unsigned int version;
diff --git a/include/linux/ptp_clock_kernel.h b/include/linux/ptp_clock_kernel.h
index c64a1ef87240..29c5fff7aeda 100644
--- a/include/linux/ptp_clock_kernel.h
+++ b/include/linux/ptp_clock_kernel.h
@@ -133,7 +133,8 @@ struct ptp_clock_info {
 	int (*gettimex64)(struct ptp_clock_info *ptp, struct timespec64 *ts,
 			  struct ptp_system_timestamp *sts);
 	int (*getcrosststamp)(struct ptp_clock_info *ptp,
-			      struct system_device_crosststamp *cts);
+			      struct system_device_crosststamp *cts,
+			      long *flag);
 	int (*settime64)(struct ptp_clock_info *p, const struct timespec64 *ts);
 	int (*enable)(struct ptp_clock_info *ptp,
 		      struct ptp_clock_request *request, int on);
-- 
2.17.1