From 66f305c46cf5326c1454ee4c8898a654305021bb Mon Sep 17 00:00:00 2001
From: Alex Forencich <alex@alexforencich.com>
Date: Thu, 24 Nov 2022 01:41:31 -0800
Subject: [PATCH] modules/mqnic: Added helper methods for converting cycle
 counts to/from time

Signed-off-by: Alex Forencich <alex@alexforencich.com>
---
 modules/mqnic/mqnic.h          |  4 ++++
 modules/mqnic/mqnic_clk_info.c | 36 ++++++++++++++++++++++++++++++++++
 2 files changed, 40 insertions(+)

diff --git a/modules/mqnic/mqnic.h b/modules/mqnic/mqnic.h
index 3884f5379..23ce0405f 100644
--- a/modules/mqnic/mqnic.h
+++ b/modules/mqnic/mqnic.h
@@ -586,6 +586,10 @@ u32 mqnic_get_core_clk_nom_freq_hz(struct mqnic_dev *mdev);
 u32 mqnic_get_ref_clk_nom_freq_hz(struct mqnic_dev *mdev);
 u32 mqnic_get_core_clk_freq_hz(struct mqnic_dev *mdev);
 u32 mqnic_get_clk_freq_hz(struct mqnic_dev *mdev, int ch);
+u64 mqnic_core_clk_cycles_to_ns(struct mqnic_dev *mdev, u64 cycles);
+u64 mqnic_core_clk_ns_to_cycles(struct mqnic_dev *mdev, u64 ns);
+u64 mqnic_ref_clk_cycles_to_ns(struct mqnic_dev *mdev, u64 cycles);
+u64 mqnic_ref_clk_ns_to_cycles(struct mqnic_dev *mdev, u64 ns);
 
 // mqnic_stats.c
 void mqnic_stats_init(struct mqnic_dev *mdev);
diff --git a/modules/mqnic/mqnic_clk_info.c b/modules/mqnic/mqnic_clk_info.c
index 7194e7812..5a9490a7a 100644
--- a/modules/mqnic/mqnic_clk_info.c
+++ b/modules/mqnic/mqnic_clk_info.c
@@ -88,3 +88,39 @@ u32 mqnic_get_clk_freq_hz(struct mqnic_dev *mdev, int ch)
 	return ioread32(mdev->clk_info_rb->regs + MQNIC_RB_CLK_INFO_FREQ_BASE + ch*4);
 }
 EXPORT_SYMBOL(mqnic_get_clk_freq_hz);
+
+u64 mqnic_core_clk_cycles_to_ns(struct mqnic_dev *mdev, u64 cycles)
+{
+	if (!mdev->clk_info_rb || !mdev->core_clk_nom_per_ns_denom)
+		return 0;
+
+	return (cycles * (u64)mdev->core_clk_nom_per_ns_num) / (u64)mdev->core_clk_nom_per_ns_denom;
+}
+EXPORT_SYMBOL(mqnic_core_clk_cycles_to_ns);
+
+u64 mqnic_core_clk_ns_to_cycles(struct mqnic_dev *mdev, u64 ns)
+{
+	if (!mdev->clk_info_rb || !mdev->core_clk_nom_per_ns_num)
+		return 0;
+
+	return (ns * (u64)mdev->core_clk_nom_per_ns_denom) / (u64)mdev->core_clk_nom_per_ns_num;
+}
+EXPORT_SYMBOL(mqnic_core_clk_ns_to_cycles);
+
+u64 mqnic_ref_clk_cycles_to_ns(struct mqnic_dev *mdev, u64 cycles)
+{
+	if (!mdev->clk_info_rb || !mdev->ref_clk_nom_per_ns_denom)
+		return 0;
+
+	return (cycles * (u64)mdev->ref_clk_nom_per_ns_num) / (u64)mdev->ref_clk_nom_per_ns_denom;
+}
+EXPORT_SYMBOL(mqnic_ref_clk_cycles_to_ns);
+
+u64 mqnic_ref_clk_ns_to_cycles(struct mqnic_dev *mdev, u64 ns)
+{
+	if (!mdev->clk_info_rb || !mdev->ref_clk_nom_per_ns_num)
+		return 0;
+
+	return (ns * (u64)mdev->ref_clk_nom_per_ns_denom) / (u64)mdev->ref_clk_nom_per_ns_num;
+}
+EXPORT_SYMBOL(mqnic_ref_clk_ns_to_cycles);