summaryrefslogtreecommitdiffstats
path: root/lib/iommu-helper.c
diff options
context:
space:
mode:
authorIngo Molnar <mingo@elte.hu>2009-12-28 09:23:13 +0100
committerIngo Molnar <mingo@elte.hu>2009-12-28 09:23:13 +0100
commit605c1a187f3ce82fbc243e2163c5ca8d1926df8e (patch)
treec8065a8c5606a66f81dc494ce22a5baa5e0dfe7e /lib/iommu-helper.c
parentx86, compress: Force i386 instructions for the decompressor (diff)
parentMerge branches 'dma-debug/fixes' and 'amd-iommu/fixes' into iommu/fixes (diff)
downloadlinux-605c1a187f3ce82fbc243e2163c5ca8d1926df8e.tar.xz
linux-605c1a187f3ce82fbc243e2163c5ca8d1926df8e.zip
Merge branch 'iommu/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/linux-2.6-iommu into x86/urgent
Diffstat (limited to 'lib/iommu-helper.c')
-rw-r--r--lib/iommu-helper.c59
1 files changed, 9 insertions, 50 deletions
diff --git a/lib/iommu-helper.c b/lib/iommu-helper.c
index 75dbda03f4fb..c0251f4ad08b 100644
--- a/lib/iommu-helper.c
+++ b/lib/iommu-helper.c
@@ -3,41 +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;
- for (i = index; i < end; i++) {
- if (test_bit(i, map)) {
- 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,
@@ -55,31 +21,24 @@ unsigned long iommu_area_alloc(unsigned long *map, unsigned long size,
unsigned long align_mask)
{
unsigned long index;
+
+ /* We don't want the last of the limit */
+ size -= 1;
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)
{