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[PATCH] x86_64: trivial gart clean-up

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A trivial change to have gart_unmap_sg call gart_unmap_single directly,
instead of bouncing through the dma_unmap_single wrapper in
dma-mapping.h.

This change required moving the gart_unmap_single above gart_unmap_sg,
and under gart_map_single (which seems a more logical place that its
current location IMHO).

Signed-off-by: Jon Mason <jdmason@us.ibm.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Jon Mason 2006-06-26 13:56:37 +02:00 • committed by Linus Torvalds
parent f0f2d6536e
commit 7c2d9cd218
1 changed files with 23 additions and 23 deletions
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46
arch/x86_64/kernel/pci-gart.c
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@ -288,6 +288,28 @@ dma_addr_t gart_map_single(struct device *dev, void *addr, size_t size, int dir)
return bus; return bus;
} }
/*
* Free a DMA mapping.
*/
void gart_unmap_single(struct device *dev, dma_addr_t dma_addr,
size_t size, int direction)
{
unsigned long iommu_page;
int npages;
int i;
if (dma_addr < iommu_bus_base + EMERGENCY_PAGES*PAGE_SIZE ||
dma_addr >= iommu_bus_base + iommu_size)
return;
iommu_page = (dma_addr - iommu_bus_base)>>PAGE_SHIFT;
npages = to_pages(dma_addr, size);
for (i = 0; i < npages; i++) {
iommu_gatt_base[iommu_page + i] = gart_unmapped_entry;
CLEAR_LEAK(iommu_page + i);
}
free_iommu(iommu_page, npages);
}
/* /*
* Wrapper for pci_unmap_single working with scatterlists. * Wrapper for pci_unmap_single working with scatterlists.
*/ */
@ -299,7 +321,7 @@ void gart_unmap_sg(struct device *dev, struct scatterlist *sg, int nents, int di
struct scatterlist *s = &sg[i]; struct scatterlist *s = &sg[i];
if (!s->dma_length || !s->length) if (!s->dma_length || !s->length)
break; break;
dma_unmap_single(dev, s->dma_address, s->dma_length, dir); gart_unmap_single(dev, s->dma_address, s->dma_length, dir);
} }
} }
@ -458,28 +480,6 @@ error:
return 0; return 0;
} }
/*
* Free a DMA mapping.
*/
void gart_unmap_single(struct device *dev, dma_addr_t dma_addr,
size_t size, int direction)
{
unsigned long iommu_page;
int npages;
int i;
if (dma_addr < iommu_bus_base + EMERGENCY_PAGES*PAGE_SIZE ||
dma_addr >= iommu_bus_base + iommu_size)
return;
iommu_page = (dma_addr - iommu_bus_base)>>PAGE_SHIFT;
npages = to_pages(dma_addr, size);
for (i = 0; i < npages; i++) {
iommu_gatt_base[iommu_page + i] = gart_unmapped_entry;
CLEAR_LEAK(iommu_page + i);
}
free_iommu(iommu_page, npages);
}
static int no_agp; static int no_agp;
static __init unsigned long check_iommu_size(unsigned long aper, u64 aper_size) static __init unsigned long check_iommu_size(unsigned long aper, u64 aper_size)