The patch titled
iommu-helper: use bitmap library
has been added to the -mm tree. Its filename is
iommu-helper-use-bitmap-library.patch
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------------------------------------------------------
Subject: iommu-helper: use bitmap library
From: Akinobu Mita <akinobu.mita@xxxxxxxxx>
Use bitmap library and kill some unused iommu helper functions.
Signed-off-by: Akinobu Mita <akinobu.mita@xxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx>
Cc: Joerg Roedel <joerg.roedel@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
diff -puN arch/powerpc/kernel/iommu.c~iommu-helper-use-bitmap-library arch/powerpc/kernel/iommu.c
--- a/arch/powerpc/kernel/iommu.c~iommu-helper-use-bitmap-library
+++ a/arch/powerpc/kernel/iommu.c
@@ -30,7 +30,7 @@
#include <linux/spinlock.h>
#include <linux/string.h>
#include <linux/dma-mapping.h>
-#include <linux/bitops.h>
+#include <linux/bitmap.h>
#include <linux/iommu-helper.h>
#include <linux/crash_dump.h>
#include <asm/io.h>
@@ -251,7 +251,7 @@ static void __iommu_free(struct iommu_ta
}
ppc_md.tce_free(tbl, entry, npages);
- iommu_area_free(tbl->it_map, free_entry, npages);
+ bitmap_clear(tbl->it_map, free_entry, npages);
}
static void iommu_free(struct iommu_table *tbl, dma_addr_t dma_addr,
diff -puN arch/sparc/kernel/iommu.c~iommu-helper-use-bitmap-library arch/sparc/kernel/iommu.c
--- a/arch/sparc/kernel/iommu.c~iommu-helper-use-bitmap-library
+++ a/arch/sparc/kernel/iommu.c
@@ -11,6 +11,7 @@
#include <linux/dma-mapping.h>
#include <linux/errno.h>
#include <linux/iommu-helper.h>
+#include <linux/bitmap.h>
#ifdef CONFIG_PCI
#include <linux/pci.h>
@@ -169,7 +170,7 @@ void iommu_range_free(struct iommu *iomm
entry = (dma_addr - iommu->page_table_map_base) >> IO_PAGE_SHIFT;
- iommu_area_free(arena->map, entry, npages);
+ bitmap_clear(arena->map, entry, npages);
}
int iommu_table_init(struct iommu *iommu, int tsbsize,
diff -puN arch/x86/kernel/amd_iommu.c~iommu-helper-use-bitmap-library arch/x86/kernel/amd_iommu.c
--- a/arch/x86/kernel/amd_iommu.c~iommu-helper-use-bitmap-library
+++ a/arch/x86/kernel/amd_iommu.c
@@ -19,7 +19,7 @@
#include <linux/pci.h>
#include <linux/gfp.h>
-#include <linux/bitops.h>
+#include <linux/bitmap.h>
#include <linux/debugfs.h>
#include <linux/scatterlist.h>
#include <linux/dma-mapping.h>
@@ -959,7 +959,7 @@ static void dma_ops_free_addresses(struc
address = (address % APERTURE_RANGE_SIZE) >> PAGE_SHIFT;
- iommu_area_free(range->bitmap, address, pages);
+ bitmap_clear(range->bitmap, address, pages);
}
diff -puN arch/x86/kernel/pci-calgary_64.c~iommu-helper-use-bitmap-library arch/x86/kernel/pci-calgary_64.c
--- a/arch/x86/kernel/pci-calgary_64.c~iommu-helper-use-bitmap-library
+++ a/arch/x86/kernel/pci-calgary_64.c
@@ -31,7 +31,7 @@
#include <linux/string.h>
#include <linux/crash_dump.h>
#include <linux/dma-mapping.h>
-#include <linux/bitops.h>
+#include <linux/bitmap.h>
#include <linux/pci_ids.h>
#include <linux/pci.h>
#include <linux/delay.h>
@@ -211,7 +211,7 @@ static void iommu_range_reserve(struct i
spin_lock_irqsave(&tbl->it_lock, flags);
- iommu_area_reserve(tbl->it_map, index, npages);
+ bitmap_set(tbl->it_map, index, npages);
spin_unlock_irqrestore(&tbl->it_lock, flags);
}
@@ -305,7 +305,7 @@ static void iommu_free(struct iommu_tabl
spin_lock_irqsave(&tbl->it_lock, flags);
- iommu_area_free(tbl->it_map, entry, npages);
+ bitmap_clear(tbl->it_map, entry, npages);
spin_unlock_irqrestore(&tbl->it_lock, flags);
}
diff -puN arch/x86/kernel/pci-gart_64.c~iommu-helper-use-bitmap-library arch/x86/kernel/pci-gart_64.c
--- a/arch/x86/kernel/pci-gart_64.c~iommu-helper-use-bitmap-library
+++ a/arch/x86/kernel/pci-gart_64.c
@@ -22,7 +22,7 @@
#include <linux/module.h>
#include <linux/topology.h>
#include <linux/interrupt.h>
-#include <linux/bitops.h>
+#include <linux/bitmap.h>
#include <linux/kdebug.h>
#include <linux/scatterlist.h>
#include <linux/iommu-helper.h>
@@ -122,7 +122,7 @@ static void free_iommu(unsigned long off
unsigned long flags;
spin_lock_irqsave(&iommu_bitmap_lock, flags);
- iommu_area_free(iommu_gart_bitmap, offset, size);
+ bitmap_clear(iommu_gart_bitmap, offset, size);
if (offset >= next_bit)
next_bit = offset + size;
spin_unlock_irqrestore(&iommu_bitmap_lock, flags);
@@ -781,7 +781,7 @@ void __init gart_iommu_init(void)
* Out of IOMMU space handling.
* Reserve some invalid pages at the beginning of the GART.
*/
- iommu_area_reserve(iommu_gart_bitmap, 0, EMERGENCY_PAGES);
+ bitmap_set(iommu_gart_bitmap, 0, EMERGENCY_PAGES);
agp_memory_reserved = iommu_size;
printk(KERN_INFO
diff -puN include/linux/iommu-helper.h~iommu-helper-use-bitmap-library include/linux/iommu-helper.h
--- a/include/linux/iommu-helper.h~iommu-helper-use-bitmap-library
+++ a/include/linux/iommu-helper.h
@@ -14,14 +14,11 @@ static inline unsigned long iommu_device
extern int iommu_is_span_boundary(unsigned int index, unsigned int nr,
unsigned long shift,
unsigned long boundary_size);
-extern void iommu_area_reserve(unsigned long *map, unsigned long i, int len);
extern unsigned long iommu_area_alloc(unsigned long *map, unsigned long size,
unsigned long start, unsigned int nr,
unsigned long shift,
unsigned long boundary_size,
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~iommu-helper-use-bitmap-library lib/iommu-helper.c
--- a/lib/iommu-helper.c~iommu-helper-use-bitmap-library
+++ a/lib/iommu-helper.c
@@ -3,40 +3,7 @@
*/
#include <linux/module.h>
-#include <linux/bitops.h>
-
-static unsigned long find_next_zero_area(unsigned long *map,
- unsigned long size,
- unsigned long start,
- unsigned int nr,
- unsigned long align_mask)
-{
- unsigned long index, end, i;
-again:
- index = find_next_zero_bit(map, size, start);
-
- /* Align allocation */
- index = (index + align_mask) & ~align_mask;
-
- end = index + nr;
- if (end >= size)
- return -1;
- i = find_next_bit(map, end, index);
- if (i < end) {
- start = i + 1;
- goto again;
- }
- return index;
-}
-
-void iommu_area_reserve(unsigned long *map, unsigned long i, int len)
-{
- unsigned long end = i + len;
- while (i < end) {
- __set_bit(i, map);
- i++;
- }
-}
+#include <linux/bitmap.h>
int iommu_is_span_boundary(unsigned int index, unsigned int nr,
unsigned long shift,
@@ -55,30 +22,20 @@ unsigned long iommu_area_alloc(unsigned
{
unsigned long index;
again:
- index = find_next_zero_area(map, size, start, nr, align_mask);
- if (index != -1) {
+ index = bitmap_find_next_zero_area(map, size, start, nr, align_mask);
+ if (index < size) {
if (iommu_is_span_boundary(index, nr, shift, boundary_size)) {
/* we could do more effectively */
start = index + 1;
goto again;
}
- iommu_area_reserve(map, index, nr);
+ bitmap_set(map, index, nr);
+ return index;
}
- return index;
+ return -1;
}
EXPORT_SYMBOL(iommu_area_alloc);
-void iommu_area_free(unsigned long *map, unsigned long start, unsigned int nr)
-{
- unsigned long end = start + nr;
-
- while (start < end) {
- __clear_bit(start, map);
- start++;
- }
-}
-EXPORT_SYMBOL(iommu_area_free);
-
unsigned long iommu_num_pages(unsigned long addr, unsigned long len,
unsigned long io_page_size)
{
_
Patches currently in -mm which might be from akinobu.mita@xxxxxxxxx are
iommu-helper-simplify-find_next_zero_area.patch
bitmap-introduce-bitmap_set-bitmap_clear-bitmap_find_next_zero_area.patch
iommu-helper-use-bitmap-library.patch
isp1362-hcd-use-bitmap_find_next_zero_area.patch
mlx4-use-bitmap_find_next_zero_area.patch
sparc-use-bitmap_find_next_zero_area.patch
ia64-use-bitmap_find_next_zero_area.patch
genalloc-use-bitmap_find_next_zero_area.patch
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