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23 October 2021, 00:29:24 UTC
Revision a3aad4aaf871045ab1dd9c99be6c1ace881d8eb0 authored by Ralf Baechle on 09 December 2010, 19:14:09 UTC, committed by Ralf Baechle on 16 December 2010, 18:11:01 UTC 
MIPS: Rename mips_dma_cache_sync back to dma_cache_sync
 
This fixes IP22 and IP28 build errors.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
1 parent d002aaa
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Tip revision: a3aad4aaf871045ab1dd9c99be6c1ace881d8eb0 authored by Ralf Baechle on 09 December 2010, 19:14:09 UTC
MIPS: Rename mips_dma_cache_sync back to dma_cache_sync
Tip revision: a3aad4a
iommu-helper.c 
/*
 * IOMMU helper functions for the free area management
 */

#include <linux/module.h>
#include <linux/bitmap.h>

int iommu_is_span_boundary(unsigned int index, unsigned int nr,
			   unsigned long shift,
			   unsigned long boundary_size)
{
	BUG_ON(!is_power_of_2(boundary_size));

	shift = (shift + index) & (boundary_size - 1);
	return shift + nr > boundary_size;
}

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)) {
			/* we could do more effectively */
			start = index + 1;
			goto again;
		}
		bitmap_set(map, index, nr);
		return index;
	}
	return -1;
}
EXPORT_SYMBOL(iommu_area_alloc);
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