From 08f87f769b595151be1afeff53e144f543faa614 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 06 Dec 2023 09:51:13 +0000
Subject: [PATCH] add dts config
---
kernel/drivers/gpu/arm/bifrost/mali_kbase_mem_lowlevel.h | 20 +++++++++++++++++++-
1 files changed, 19 insertions(+), 1 deletions(-)
diff --git a/kernel/drivers/gpu/arm/bifrost/mali_kbase_mem_lowlevel.h b/kernel/drivers/gpu/arm/bifrost/mali_kbase_mem_lowlevel.h
index 3f260bf..5a1bb16 100644
--- a/kernel/drivers/gpu/arm/bifrost/mali_kbase_mem_lowlevel.h
+++ b/kernel/drivers/gpu/arm/bifrost/mali_kbase_mem_lowlevel.h
@@ -1,7 +1,7 @@
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
*
- * (C) COPYRIGHT 2012-2014, 2016-2018, 2020-2021 ARM Limited. All rights reserved.
+ * (C) COPYRIGHT 2012-2014, 2016-2018, 2020-2022 ARM Limited. All rights reserved.
*
* This program is free software and is provided to you under the terms of the
* GNU General Public License version 2 as published by the Free Software
@@ -47,6 +47,8 @@
#define HUGE_PAGE (1u << 0)
#define HUGE_HEAD (1u << 1)
#define FROM_PARTIAL (1u << 2)
+
+#define NUM_4K_PAGES_IN_2MB_PAGE (SZ_2M / SZ_4K)
/*
* Note: if macro for converting physical address to page is not defined
@@ -158,4 +160,20 @@
return t.tagged_addr & FROM_PARTIAL;
}
+/**
+ * index_in_large_page() - Get index of a 4KB page within a 2MB page which
+ * wasn't split to be used partially.
+ *
+ * @t: Tagged physical address of the physical 4KB page that lies within
+ * the large (or 2 MB) physical page.
+ *
+ * Return: Index of the 4KB page within a 2MB page
+ */
+static inline unsigned int index_in_large_page(struct tagged_addr t)
+{
+ WARN_ON(!is_huge(t));
+
+ return (PFN_DOWN(as_phys_addr_t(t)) & (NUM_4K_PAGES_IN_2MB_PAGE - 1));
+}
+
#endif /* _KBASE_LOWLEVEL_H */
--
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