提交 7c2d9cd2 编写于 作者: J Jon Mason 提交者: Linus Torvalds

[PATCH] x86_64: trivial gart clean-up

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: NJon Mason <jdmason@us.ibm.com>
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
上级 f0f2d653
......@@ -288,6 +288,28 @@ dma_addr_t gart_map_single(struct device *dev, void *addr, size_t size, int dir)
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.
*/
......@@ -299,7 +321,7 @@ void gart_unmap_sg(struct device *dev, struct scatterlist *sg, int nents, int di
struct scatterlist *s = &sg[i];
if (!s->dma_length || !s->length)
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 @@ int gart_map_sg(struct device *dev, struct scatterlist *sg, int nents, int dir)
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 __init unsigned long check_iommu_size(unsigned long aper, u64 aper_size)
......
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