diff options
| author | Robin Murphy <Robin.Murphy@arm.com> | 2015-07-29 19:46:07 +0100 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2015-08-06 14:35:39 +0100 |
| commit | bdc6d973473f32891a8518c51b210ce7daaa10ac (patch) | |
| tree | 5cab7bf947e6314ce84c04b62d4a8a8c96b60c44 /drivers/iommu | |
| parent | 2df7a25ce4a79092946330ac4b7a2fbb5944d1d6 (diff) | |
| download | op-kernel-dev-bdc6d973473f32891a8518c51b210ce7daaa10ac.zip op-kernel-dev-bdc6d973473f32891a8518c51b210ce7daaa10ac.tar.gz | |
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')
| -rw-r--r-- | drivers/iommu/arm-smmu-v3.c | 18 |
1 files changed, 3 insertions, 15 deletions
diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c index e51646a..54c68d1 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); |
