The patch titled
introduce generic iommu_num_pages function
has been added to the -mm tree. Its filename is
introduce-generic-iommu_num_pages-function.patch
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------------------------------------------------------
Subject: introduce generic iommu_num_pages function
From: Joerg Roedel <joerg.roedel@xxxxxxx>
This patch introduces the generic iommu_num_pages function. It can be used by
a given memory area.
Signed-off-by: Joerg Roedel <joerg.roedel@xxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Richard Henderson <rth@xxxxxxxxxxx>
Cc: Ivan Kokshaysky <ink@xxxxxxxxxxxxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx>
Cc: Muli Ben-Yehuda <muli@xxxxxxxxxx>
Cc: Dave Airlie <airlied@xxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/iommu-helper.h | 2 ++
lib/iommu-helper.c | 9 +++++++++
2 files changed, 11 insertions(+)
diff -puN include/linux/iommu-helper.h~introduce-generic-iommu_num_pages-function include/linux/iommu-helper.h
--- a/include/linux/iommu-helper.h~introduce-generic-iommu_num_pages-function
+++ a/include/linux/iommu-helper.h
@@ -8,3 +8,5 @@ extern unsigned long iommu_area_alloc(un
unsigned long align_mask);
extern void iommu_area_free(unsigned long *map, unsigned long start,
unsigned int nr);
+extern unsigned long iommu_num_pages(unsigned long addr, unsigned long len,
+ unsigned long io_page_size);
diff -puN lib/iommu-helper.c~introduce-generic-iommu_num_pages-function lib/iommu-helper.c
--- a/lib/iommu-helper.c~introduce-generic-iommu_num_pages-function
+++ a/lib/iommu-helper.c
@@ -80,3 +80,12 @@ void iommu_area_free(unsigned long *map,
}
}
EXPORT_SYMBOL(iommu_area_free);
+
+unsigned long iommu_num_pages(unsigned long addr, unsigned long len,
+ unsigned long io_page_size)
+{
+ unsigned long size = (addr & (io_page_size - 1)) + len;
+
+ return DIV_ROUND_UP(size, io_page_size);
+}
+EXPORT_SYMBOL(iommu_num_pages);
_
Patches currently in -mm which might be from joerg.roedel@xxxxxxx are
origin.patch
linux-next.patch
x86-rename-iommu_num_pages-function-to-iommu_nr_pages.patch
sparc64-rename-iommu_num_pages-function-to-iommu_nr_pages.patch
powerpc-rename-iommu_num_pages-function-to-iommu_nr_pages.patch
introduce-generic-iommu_num_pages-function.patch
x86-convert-gart-driver-to-generic-iommu_num_pages-function.patch
x86-amd-iommu-convert-driver-to-generic-iommu_num_pages-function.patch
x86-convert-calgary-iommu-driver-to-generic-iommu_num_pages-function.patch
powerpc-use-iommu_num_pages-function-in-iommu-code.patch
alpha-use-iommu_num_pages-function-in-iommu-code.patch
sparc64-use-iommu_num_pages-function-in-iommu-code.patch
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