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Commit 3991501f authored by Liam Mark's avatar Liam Mark
Browse files

iommu: dma-mapping-fast: add support for DMA sync single APIs 



Implement the fast map DMA sync single APIs.

Change-Id: I1b785c7c441e53fa0b2e0fa784ff8afed8afceb9
Signed-off-by: default avatarLiam Mark <lmark@codeaurora.org>
parent b979f780

drivers/iommu/dma-mapping-fast.c

+40 −0
Original line number Diff line number Diff line
@@ -339,6 +339,30 @@ static void fast_smmu_unmap_page(struct device *dev, dma_addr_t iova, 
	spin_unlock_irqrestore(&mapping->lock, flags);

}



static void fast_smmu_sync_single_for_cpu(struct device *dev,

		dma_addr_t iova, size_t size, enum dma_data_direction dir)

{

	struct dma_fast_smmu_mapping *mapping = dev->archdata.mapping->fast;

	av8l_fast_iopte *pmd = iopte_pmd_offset(mapping->pgtbl_pmds, iova);

	unsigned long offset = iova & ~FAST_PAGE_MASK;

	struct page *page = phys_to_page((*pmd & FAST_PTE_ADDR_MASK));



	if (!is_device_dma_coherent(dev))

		__fast_dma_page_dev_to_cpu(page, offset, size, dir);

}



static void fast_smmu_sync_single_for_device(struct device *dev,

		dma_addr_t iova, size_t size, enum dma_data_direction dir)

{

	struct dma_fast_smmu_mapping *mapping = dev->archdata.mapping->fast;

	av8l_fast_iopte *pmd = iopte_pmd_offset(mapping->pgtbl_pmds, iova);

	unsigned long offset = iova & ~FAST_PAGE_MASK;

	struct page *page = phys_to_page((*pmd & FAST_PTE_ADDR_MASK));



	if (!is_device_dma_coherent(dev))

		__fast_dma_page_cpu_to_dev(page, offset, size, dir);

}



static int fast_smmu_map_sg(struct device *dev, struct scatterlist *sg,

			    int nents, enum dma_data_direction dir,

			    struct dma_attrs *attrs)
@@ -354,6 +378,18 @@ static void fast_smmu_unmap_sg(struct device *dev, 
	WARN_ON_ONCE(1);

}



static void fast_smmu_sync_sg_for_cpu(struct device *dev,

		struct scatterlist *sg, int nents, enum dma_data_direction dir)

{

	WARN_ON_ONCE(1);

}



static void fast_smmu_sync_sg_for_device(struct device *dev,

		struct scatterlist *sg, int nents, enum dma_data_direction dir)

{

	WARN_ON_ONCE(1);

}



static void __fast_smmu_free_pages(struct page **pages, int count)

{

	while (count--)
@@ -590,8 +626,12 @@ static const struct dma_map_ops fast_smmu_dma_ops = { 
	.mmap = fast_smmu_mmap_attrs,

	.map_page = fast_smmu_map_page,

	.unmap_page = fast_smmu_unmap_page,

	.sync_single_for_cpu = fast_smmu_sync_single_for_cpu,

	.sync_single_for_device = fast_smmu_sync_single_for_device,

	.map_sg = fast_smmu_map_sg,

	.unmap_sg = fast_smmu_unmap_sg,

	.sync_sg_for_cpu = fast_smmu_sync_sg_for_cpu,

	.sync_sg_for_device = fast_smmu_sync_sg_for_device,

	.dma_supported = fast_smmu_dma_supported,

	.mapping_error = fast_smmu_mapping_error,

};