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

Lu Baolu
2023-01-04T13:11:45Z

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@linux.intel.com>
---
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