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iommu: export iommu_area_reserve helper function

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x86 has set_bit_string() that does the exact same thing that
set_bit_area() in lib/iommu-helper.c does.

This patch exports set_bit_area() in lib/iommu-helper.c as
iommu_area_reserve(), converts GART, Calgary, and AMD IOMMU to use it.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
FUJITA Tomonori 2008-09-22 22:35:07 +09:00 committed by Ingo Molnar
parent 832a90c304
commit d26dbc5cf9
5 changed files with 6 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/x86/kernel/amd_iommu.c
View File

@ -572,7 +572,7 @@ static void dma_ops_reserve_addresses(struct dma_ops_domain *dom,
if (start_page + pages > last_page)
pages = last_page - start_page;
set_bit_string(dom->bitmap, start_page, pages);
iommu_area_reserve(dom->bitmap, start_page, pages);
}
static void dma_ops_free_pagetable(struct dma_ops_domain *dma_dom)

2
arch/x86/kernel/pci-calgary_64.c
View File

@ -261,7 +261,7 @@ static void iommu_range_reserve(struct iommu_table *tbl,
badbit, tbl, start_addr, npages);
}
set_bit_string(tbl->it_map, index, npages);
iommu_area_reserve(tbl->it_map, index, npages);
spin_unlock_irqrestore(&tbl->it_lock, flags);
}

2
arch/x86/kernel/pci-gart_64.c
View File

@ -827,7 +827,7 @@ void __init gart_iommu_init(void)
* Out of IOMMU space handling.
* Reserve some invalid pages at the beginning of the GART.
*/
set_bit_string(iommu_gart_bitmap, 0, EMERGENCY_PAGES);
iommu_area_reserve(iommu_gart_bitmap, 0, EMERGENCY_PAGES);
agp_memory_reserved = iommu_size;
printk(KERN_INFO

1
include/linux/iommu-helper.h
View File

@ -11,6 +11,7 @@ static inline unsigned long iommu_device_max_index(unsigned long size,
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,

5
lib/iommu-helper.c
View File

@ -30,8 +30,7 @@ again:
return index;
}
static inline void set_bit_area(unsigned long *map, unsigned long i,
int len)
void iommu_area_reserve(unsigned long *map, unsigned long i, int len)
{
unsigned long end = i + len;
while (i < end) {
@ -64,7 +63,7 @@ again:
start = index + 1;
goto again;
}
set_bit_area(map, index, nr);
iommu_area_reserve(map, index, nr);
}
return index;
}