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x86: dma_*_coherent rework patchset v2, fix

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alloc_coherent dma_ops callback was added to GART, however, it doesn't
return a size aligned address wrt dma_alloc_coherent, as
DMA-mapping.txt defines. This patch fixes it.

This patch also removes unused gart_map_simple
(dma_mapping_ops->map_simple has gone).

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
FUJITA Tomonori 2008-08-22 16:29:10 +09:00 committed by Ingo Molnar
parent 0d8136ea50
commit 421076e2be
1 changed files with 10 additions and 15 deletions
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25
arch/x86/kernel/pci-gart_64.c
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@ -261,20 +261,6 @@ static dma_addr_t dma_map_area(struct device *dev, dma_addr_t phys_mem,
return iommu_bus_base + iommu_page*PAGE_SIZE + (phys_mem & ~PAGE_MASK);
}
static dma_addr_t
gart_map_simple(struct device *dev, phys_addr_t paddr, size_t size, int dir)
{
dma_addr_t map;
unsigned long align_mask;
align_mask = (1UL << get_order(size)) - 1;
map = dma_map_area(dev, paddr, size, dir, align_mask);
flush_gart();
return map;
}
/* Map a single area into the IOMMU */
static dma_addr_t
gart_map_single(struct device *dev, phys_addr_t paddr, size_t size, int dir)
@ -512,12 +498,21 @@ gart_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_addr,
gfp_t flag)
{
void *vaddr;
unsigned long align_mask;
vaddr = (void *)__get_free_pages(flag | __GFP_ZERO, get_order(size));
if (!vaddr)
return NULL;
*dma_addr = gart_map_single(dev, __pa(vaddr), size, DMA_BIDIRECTIONAL);
align_mask = (1UL << get_order(size)) - 1;
if (!dev)
dev = &x86_dma_fallback_dev;
*dma_addr = dma_map_area(dev, __pa(vaddr), size, DMA_BIDIRECTIONAL,
align_mask);
flush_gart();
if (*dma_addr != bad_dma_address)
return vaddr;