/*
 * IOMMU helper functions for the free area management
 */

#include <linux/export.h>
#include <linux/bitmap.h>
#include <linux/bug.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)) {
			start = ALIGN(shift + index, boundary_size) - shift;
			goto again;
		}
		bitmap_set(map, index, nr);
		return index;
	}
	return -1;
}
EXPORT_SYMBOL(iommu_area_alloc);
'>
<option value='emaclite-cleanup'>emaclite-cleanup</option>
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<tr><td class='sub'>net-next plumbings</td><td class='sub right'>Tobias Klauser</td></tr></table>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?h=nds-private-remove&amp;id=ff1176f6164f3d151ee64c05d3f7b6662a81b982'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/drivers?h=nds-private-remove&amp;id=ff1176f6164f3d151ee64c05d3f7b6662a81b982'>drivers</a>/<a href='/cgit.cgi/linux/net-next.git/log/drivers/usb?h=nds-private-remove&amp;id=ff1176f6164f3d151ee64c05d3f7b6662a81b982'>usb</a>/<a href='/cgit.cgi/linux/net-next.git/log/drivers/usb/isp1760?h=nds-private-remove&amp;id=ff1176f6164f3d151ee64c05d3f7b6662a81b982'>isp1760</a>/<a href='/cgit.cgi/linux/net-next.git/log/drivers/usb/isp1760/isp1760-regs.h?h=nds-private-remove&amp;id=ff1176f6164f3d151ee64c05d3f7b6662a81b982'>isp1760-regs.h</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/drivers/usb/isp1760/isp1760-regs.h?h=nds-private-remove&amp;id=ff1176f6164f3d151ee64c05d3f7b6662a81b982&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>