[PATCH v3 14/20] iommu/omap: Add set_platform_dma callback

Lu Baolu
2022-11-28T06:56:42Z

This IOMMU driver doesn't support default domain. Add the implementation
of set_platform_dma callback so that the IOMMU core could return the
DMA control.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
---
drivers/iommu/omap-iommu.c | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/drivers/iommu/omap-iommu.c b/drivers/iommu/omap-iommu.c
index 2fd7702c6709..aa3858a48bbf 100644
--- a/drivers/iommu/omap-iommu.c
+++ b/drivers/iommu/omap-iommu.c
@@ -1566,6 +1566,14 @@ static void omap_iommu_detach_dev(struct iommu_domain *domain,
spin_unlock(&omap_domain->lock);
}

+static void omap_iommu_set_platform_dma(struct device *dev)
+{
+ struct iommu_domain *domain = iommu_get_domain_for_dev(dev);
+
+ if (domain)
+ omap_iommu_detach_dev(domain, dev);
+}
+
static struct iommu_domain *omap_iommu_domain_alloc(unsigned type)
{
struct omap_iommu_domain *omap_domain;
@@ -1737,6 +1745,7 @@ static const struct iommu_ops omap_iommu_ops = {
.probe_device = omap_iommu_probe_device,
.release_device = omap_iommu_release_device,
.device_group = omap_iommu_device_group,
+ .set_platform_dma = omap_iommu_set_platform_dma,
.pgsize_bitmap = OMAP_IOMMU_PGSIZES,
.default_domain_ops = &(const struct iommu_domain_ops) {
.attach_dev = omap_iommu_attach_dev,
--
2.34.1