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linux-next/lib/iommu-helper.c
Christoph Hellwig 79c1879ee5 iommu-helper: mark iommu_is_span_boundary as inline
This avoids selecting IOMMU_HELPER just for this function.  And we only
use it once or twice in normal builds so this often even is a size
reduction.

Signed-off-by: Christoph Hellwig <hch@lst.de>
2018-05-09 06:55:44 +02:00

30 lines
755 B
C

// SPDX-License-Identifier: GPL-2.0
/*
* IOMMU helper functions for the free area management
*/
#include <linux/bitmap.h>
#include <linux/iommu-helper.h>
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)
{
unsigned long index;
/* We don't want the last of the limit */
size -= 1;
again:
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)) {
start = ALIGN(shift + index, boundary_size) - shift;
goto again;
}
bitmap_set(map, index, nr);
return index;
}
return -1;
}