[PATCH v4 17/19] iommu/tegra: Add set_platform_dma_ops callback

[Lu Baolu]

This IOMMU driver doesn't support default domain. Add the implementation
of set_platform_dma_ops callback so that the IOMMU core could return the
DMA control. With the set_platform_dma_ops implemented, there's no need
for detach_dev. Remove it to avoid dead code.

Signed-off-by: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>
---
 drivers/iommu/tegra-smmu.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c
index 5b1af40221ec..4c4ac22d5fb1 100644
--- a/drivers/iommu/tegra-smmu.c
+++ b/drivers/iommu/tegra-smmu.c
@@ -511,8 +511,9 @@ static int tegra_smmu_attach_dev(struct iommu_domain *domain,
 	return err;
 }
 
-static void tegra_smmu_detach_dev(struct iommu_domain *domain, struct device *dev)
+static void tegra_smmu_set_platform_dma(struct device *dev)
 {
+	struct iommu_domain *domain = iommu_get_domain_for_dev(dev);
 	struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
 	struct tegra_smmu_as *as = to_smmu_as(domain);
 	struct tegra_smmu *smmu = as->smmu;
@@ -965,11 +966,11 @@ static const struct iommu_ops tegra_smmu_ops = {
 	.domain_alloc = tegra_smmu_domain_alloc,
 	.probe_device = tegra_smmu_probe_device,
 	.device_group = tegra_smmu_device_group,
+	.set_platform_dma_ops = tegra_smmu_set_platform_dma,
 	.of_xlate = tegra_smmu_of_xlate,
 	.pgsize_bitmap = SZ_4K,
 	.default_domain_ops = &(const struct iommu_domain_ops) {
 		.attach_dev	= tegra_smmu_attach_dev,
-		.detach_dev	= tegra_smmu_detach_dev,
 		.map		= tegra_smmu_map,
 		.unmap		= tegra_smmu_unmap,
 		.iova_to_phys	= tegra_smmu_iova_to_phys,
-- 
2.34.1