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iommu/arm-smmu: Clean up DMA API usage 

With the correct DMA API calls now integrated into the io-pgtable code,
let that handle the flushing of non-coherent page table updates.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Robin Murphy 2015-07-29 19:46:07 +01:00 committed by Will Deacon
parent 2df7a25ce4
commit bdc6d97347
1 changed files with 3 additions and 15 deletions
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18
drivers/iommu/arm-smmu-v3.c
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@ -1334,23 +1334,10 @@ static void arm_smmu_tlb_inv_range_nosync(unsigned long iova, size_t size,
static void arm_smmu_flush_pgtable(void *addr, size_t size, void *cookie)
{
struct arm_smmu_domain *smmu_domain = cookie;
struct arm_smmu_device *smmu = smmu_domain->smmu;
unsigned long offset = (unsigned long)addr & ~PAGE_MASK;
if (smmu->features & ARM_SMMU_FEAT_COHERENCY) {
/* The page table code handles flushing in the non-coherent case */
if (smmu_domain->smmu->features & ARM_SMMU_FEAT_COHERENCY)
dsb(ishst);
} else {
dma_addr_t dma_addr;
struct device *dev = smmu->dev;
dma_addr = dma_map_page(dev, virt_to_page(addr), offset, size,
DMA_TO_DEVICE);
if (dma_mapping_error(dev, dma_addr))
dev_err(dev, "failed to flush pgtable at %p\n", addr);
else
dma_unmap_page(dev, dma_addr, size, DMA_TO_DEVICE);
}
}
static struct iommu_gather_ops arm_smmu_gather_ops = {
@ -1532,6 +1519,7 @@ static int arm_smmu_domain_finalise(struct iommu_domain *domain)
.ias = ias,
.oas = oas,
.tlb = &arm_smmu_gather_ops,
.iommu_dev = smmu->dev,
};
pgtbl_ops = alloc_io_pgtable_ops(fmt, &pgtbl_cfg, smmu_domain);