From ffbbef5c0639dbf31a0511d8f65f574bb3e30758 Mon Sep 17 00:00:00 2001 From: FUJITA Tomonori Date: Mon, 5 Jan 2009 23:47:26 +0900 Subject: [PATCH] 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 Signed-off-by: Ingo Molnar --- drivers/pci/intel-iommu.c | 24 ++++++++++++++++++++++-- 1 file changed, 22 insertions(+), 2 deletions(-) diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c index 235fb7a5a8a5..60258ecbcb4c 100644 --- a/drivers/pci/intel-iommu.c +++ b/drivers/pci/intel-iommu.c @@ -2273,6 +2273,15 @@ error: 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) -- 2.39.5