Register platform_devices to IOMMU dynamically via
ops->{add,remove}_device().
Signed-off-by: Hiroshi Doyu <hdoyu@xxxxxxxxxx>
---
drivers/iommu/tegra-smmu.c | 37 +++++++++++++++++++++++++++++++++++++
1 file changed, 37 insertions(+)
diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c
index 1617c90..35f4a16 100644
--- a/drivers/iommu/tegra-smmu.c
+++ b/drivers/iommu/tegra-smmu.c
@@ -39,6 +39,7 @@
#include <asm/page.h>
#include <asm/cacheflush.h>
+#include <asm/dma-iommu.h>
enum smmu_hwgrp {
HWGRP_AFI,
@@ -949,6 +950,40 @@ static void smmu_iommu_domain_destroy(struct iommu_domain *domain)
dev_dbg(smmu->dev, "smmu_as@%p\n", as);
}
+/*
+ * ASID[0] for the system default
+ * ASID[1] for PPCS, which has SDMMC
+ * ASID[2][3].. open for drivers, first come, first served.
+ */
+enum {
+ SYSTEM_DEFAULT,
+ SYSTEM_PROTECTED,
+};
+
+static int smmu_iommu_add_device(struct device *dev)
+{
+ int err;
+ struct dma_iommu_mapping *map = smmu_handle->map[SYSTEM_DEFAULT];
+
+ if (!map)
+ goto out;
+
+ err = arm_iommu_attach_device(dev, map);
+ if (err) {
+ dev_err(dev, "Failed to attach to map %p\n", map);
+ return err;
+ }
+out:
+ dev_dbg(dev, "Attached to map %p\n", map);
+ return 0;
+}
+
+static void smmu_iommu_remove_device(struct device *dev)
+{
+ dev_dbg(dev, "Detaching from map %p\n", to_dma_iommu_mapping(dev));
+ arm_iommu_detach_device(dev);
+}
+
static struct iommu_ops smmu_iommu_ops = {
.domain_init = smmu_iommu_domain_init,
.domain_destroy = smmu_iommu_domain_destroy,
@@ -958,6 +993,8 @@ static struct iommu_ops smmu_iommu_ops = {
.unmap = smmu_iommu_unmap,
.iova_to_phys = smmu_iommu_iova_to_phys,
.domain_has_cap = smmu_iommu_domain_has_cap,
+ .add_device = smmu_iommu_add_device,
+ .remove_device = smmu_iommu_remove_device,
.pgsize_bitmap = SMMU_IOMMU_PGSIZES,
};
--
1.7.9.5
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