[PATCH v4 16/19] iommu/gart: Add set_platform_dma_ops callback

Lu Baolu
2023-01-04T13:09:02Z

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 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-gart.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/iommu/tegra-gart.c b/drivers/iommu/tegra-gart.c
index ed53279d1106..a482ff838b53 100644
--- a/drivers/iommu/tegra-gart.c
+++ b/drivers/iommu/tegra-gart.c
@@ -124,9 +124,9 @@ static int gart_iommu_attach_dev(struct iommu_domain *domain,
return ret;
}

-static void gart_iommu_detach_dev(struct iommu_domain *domain,
- struct device *dev)
+static void gart_iommu_set_platform_dma(struct device *dev)
{
+ struct iommu_domain *domain = iommu_get_domain_for_dev(dev);
struct gart_device *gart = gart_handle;

spin_lock(&gart->dom_lock);
@@ -270,11 +270,11 @@ static const struct iommu_ops gart_iommu_ops = {
.domain_alloc = gart_iommu_domain_alloc,
.probe_device = gart_iommu_probe_device,
.device_group = generic_device_group,
+ .set_platform_dma_ops = gart_iommu_set_platform_dma,
.pgsize_bitmap = GART_IOMMU_PGSIZES,
.of_xlate = gart_iommu_of_xlate,
.default_domain_ops = &(const struct iommu_domain_ops) {
.attach_dev = gart_iommu_attach_dev,
- .detach_dev = gart_iommu_detach_dev,
.map = gart_iommu_map,
.unmap = gart_iommu_unmap,
.iova_to_phys = gart_iommu_iova_to_phys,
--
2.34.1