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authorRobin Murphy <Robin.Murphy@arm.com>2015-07-29 19:46:07 +0100
committerWill Deacon <will.deacon@arm.com>2015-08-06 14:35:39 +0100
commitbdc6d973473f32891a8518c51b210ce7daaa10ac (patch)
tree5cab7bf947e6314ce84c04b62d4a8a8c96b60c44 /drivers/iommu/arm-smmu-v3.c
parent2df7a25ce4a79092946330ac4b7a2fbb5944d1d6 (diff)
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>
Diffstat (limited to 'drivers/iommu/arm-smmu-v3.c')
-rw-r--r--drivers/iommu/arm-smmu-v3.c18
1 files changed, 3 insertions, 15 deletions
diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index e51646a3b973..54c68d123a6d 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -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);