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From: Felipe Balbi <felipe.balbi@linux.intel.com>
To: Richard Cochran <richardcochran@gmail.com>
Cc: netdev@vger.kernel.org, Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	"H . Peter Anvin" <hpa@zytor.com>,
	x86@kernel.org, linux-kernel@vger.kernel.org,
	"Christopher S . Hall" <christopher.s.hall@intel.com>,
	Felipe Balbi <felipe.balbi@linux.intel.com>
Subject: [RFC PATCH 1/5] x86: tsc: add tsc to art helpers
Date: Tue, 16 Jul 2019 10:20:34 +0300	[thread overview]
Message-ID: <20190716072038.8408-2-felipe.balbi@linux.intel.com> (raw)
In-Reply-To: <20190716072038.8408-1-felipe.balbi@linux.intel.com>

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
---
 arch/x86/include/asm/tsc.h |  2 ++
 arch/x86/kernel/tsc.c      | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+)

diff --git a/arch/x86/include/asm/tsc.h b/arch/x86/include/asm/tsc.h
index 8a0c25c6bf09..b7a9f4385a82 100644
--- a/arch/x86/include/asm/tsc.h
+++ b/arch/x86/include/asm/tsc.h
@@ -32,6 +32,8 @@ static inline cycles_t get_cycles(void)
 
 extern struct system_counterval_t convert_art_to_tsc(u64 art);
 extern struct system_counterval_t convert_art_ns_to_tsc(u64 art_ns);
+extern void get_tsc_ns(struct system_counterval_t *tsc_counterval, u64 *tsc_ns);
+extern u64 get_art_ns_now(void);
 
 extern void tsc_early_init(void);
 extern void tsc_init(void);
diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c
index 0b29e58f288e..333fffc1db7c 100644
--- a/arch/x86/kernel/tsc.c
+++ b/arch/x86/kernel/tsc.c
@@ -1215,6 +1215,38 @@ struct system_counterval_t convert_art_to_tsc(u64 art)
 }
 EXPORT_SYMBOL(convert_art_to_tsc);
 
+void get_tsc_ns(struct system_counterval_t *tsc_counterval, u64 *tsc_ns)
+{
+	u64 tmp, res, rem;
+	u64 cycles;
+
+	tsc_counterval->cycles = clocksource_tsc.read(NULL);
+	cycles = tsc_counterval->cycles;
+	tsc_counterval->cs = art_related_clocksource;
+
+	rem = do_div(cycles, tsc_khz);
+
+	res = cycles * USEC_PER_SEC;
+	tmp = rem * USEC_PER_SEC;
+
+	do_div(tmp, tsc_khz);
+	res += tmp;
+
+	*tsc_ns = res;
+}
+EXPORT_SYMBOL(get_tsc_ns);
+
+u64 get_art_ns_now(void)
+{
+	struct system_counterval_t tsc_cycles;
+	u64 tsc_ns;
+
+	get_tsc_ns(&tsc_cycles, &tsc_ns);
+
+	return tsc_ns;
+}
+EXPORT_SYMBOL(get_art_ns_now);
+
 /**
  * convert_art_ns_to_tsc() - Convert ART in nanoseconds to TSC.
  * @art_ns: ART (Always Running Timer) in unit of nanoseconds
-- 
2.22.0


  reply	other threads:[~2019-07-16  7:20 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-16  7:20 [RFC PATCH 0/5] PTP: add support for Intel's TGPIO controller Felipe Balbi
2019-07-16  7:20 ` Felipe Balbi [this message]
2019-07-16  7:57   ` [RFC PATCH 1/5] x86: tsc: add tsc to art helpers Thomas Gleixner
2019-08-15  5:57     ` Felipe Balbi
2019-08-15 14:16       ` Thomas Gleixner
2019-10-01 10:24         ` Felipe Balbi
2019-10-17 11:15           ` Thomas Gleixner
2019-10-17 12:01             ` Felipe Balbi
2019-07-16  7:20 ` [RFC PATCH 2/5] PTP: add a callback for counting timestamp events Felipe Balbi
2019-07-16  7:20 ` [RFC PATCH 3/5] PTP: implement PTP_EVENT_COUNT_TSTAMP ioctl Felipe Balbi
2019-07-16  7:20 ` [RFC PATCH 4/5] PTP: Add flag for non-periodic output Felipe Balbi
2019-07-16 16:39   ` Richard Cochran
2019-07-17  6:49     ` Felipe Balbi
2019-07-17 17:36       ` Richard Cochran
2019-07-18  8:59         ` Felipe Balbi
2019-07-18 16:41           ` Richard Cochran
2019-08-13  7:53             ` Felipe Balbi
2019-08-13 17:48               ` Richard Cochran
2019-08-13 18:06                 ` Richard Cochran
2019-08-14  7:05                   ` Felipe Balbi
2019-07-16  7:20 ` [RFC PATCH 5/5] PTP: Add support for Intel PMC Timed GPIO Controller Felipe Balbi
2019-07-16 19:14   ` Shannon Nelson
2019-07-17  6:51     ` Felipe Balbi
2019-07-16 16:41 ` [RFC PATCH 0/5] PTP: add support for Intel's TGPIO controller Richard Cochran
2019-07-17  6:52   ` Felipe Balbi
2019-07-17 17:39     ` Richard Cochran
2019-07-18  8:58       ` Felipe Balbi
2019-07-18 19:50 ` Andrew Lunn
2019-07-19  7:35   ` Felipe Balbi
2019-07-19 13:20     ` Andrew Lunn
2019-08-13  7:50       ` Felipe Balbi
2019-08-13 17:49         ` Richard Cochran

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