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intel-iommu: add map_page and unmap_page 

This is a preparation of struct dma_mapping_ops unification. We use
map_page and unmap_page instead of map_single and unmap_single.

This uses a temporary workaround, ifdef X86_64 to avoid IA64
build. The workaround will be removed after the unification. Well,
changing x86's struct dma_mapping_ops could break IA64. It's just
wrong. It's one of problems that this patchset fixes.

We will remove map_single and unmap_single hooks in the last patch in
this patchset.

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 2009-01-05 23:47:26 +09:00 committed by Ingo Molnar
parent 51491367c2
commit ffbbef5c06
1 changed files with 22 additions and 2 deletions
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24
drivers/pci/intel-iommu.c
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@ -2273,6 +2273,15 @@ static dma_addr_t __intel_map_single(struct device *hwdev, phys_addr_t paddr,
return 0;
}
static dma_addr_t intel_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size,
enum dma_data_direction dir,
struct dma_attrs *attrs)
{
return __intel_map_single(dev, page_to_phys(page) + offset, size,
dir, to_pci_dev(dev)->dma_mask);
}
dma_addr_t intel_map_single(struct device *hwdev, phys_addr_t paddr,
size_t size, int dir)
{
@ -2341,8 +2350,9 @@ static void add_unmap(struct dmar_domain *dom, struct iova *iova)
spin_unlock_irqrestore(&async_umap_flush_lock, flags);
}
void intel_unmap_single(struct device *dev, dma_addr_t dev_addr, size_t size,
int dir)
static void intel_unmap_page(struct device *dev, dma_addr_t dev_addr,
size_t size, enum dma_data_direction dir,
struct dma_attrs *attrs)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct dmar_domain *domain;
@ -2386,6 +2396,12 @@ void intel_unmap_single(struct device *dev, dma_addr_t dev_addr, size_t size,
}
}
void intel_unmap_single(struct device *dev, dma_addr_t dev_addr, size_t size,
int dir)
{
intel_unmap_page(dev, dev_addr, size, dir, NULL);
}
void *intel_alloc_coherent(struct device *hwdev, size_t size,
dma_addr_t *dma_handle, gfp_t flags)
{
@ -2570,6 +2586,10 @@ static struct dma_mapping_ops intel_dma_ops = {
.unmap_single = intel_unmap_single,
.map_sg = intel_map_sg,
.unmap_sg = intel_unmap_sg,
#ifdef CONFIG_X86_64
.map_page = intel_map_page,
.unmap_page = intel_unmap_page,
#endif
};
static inline int iommu_domain_cache_init(void)