This patch support a master with multiple stream IDs, but doesn't support a
master behinds more than one SMMUs.
Signed-off-by: Zhen Lei <thunder.leiz...@huawei.com>
---
drivers/iommu/arm-smmu-v3.c | 39 +++++++++++++++++++++++++++++++++++++--
1 file changed, 37 insertions(+), 2 deletions(-)
diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index 274d059..582cd1e 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -30,6 +30,7 @@
#include <linux/of_address.h>
#include <linux/pci.h>
#include <linux/platform_device.h>
+#include <linux/amba/bus.h>
#include <linux/of_iommu.h>
#include <linux/of_platform.h>
@@ -1928,9 +1929,35 @@ static int arm_smmu_of_xlate(struct device *dev, struct
of_phandle_args *args)
return -EINVAL;
}
- /* We only support PCI, for now */
if (!dev_is_pci(dev)) {
- return -ENODEV;
+ int i;
+ struct iommu_group *group;
+
+ group = iommu_group_get(dev);
+ if (!group) {
+ group = iommu_group_alloc();
+ if (IS_ERR(group)) {
+ dev_err(dev, "failed to allocate IOMMU
group\n");
+ return PTR_ERR(group);
+ }
+
+ ret = iommu_group_add_device(group, dev);
+ if (ret) {
+ dev_err(dev, "failed to add device into IOMMU
group\n");
+ return PTR_ERR(group);
+ }
+ }
+ iommu_group_put(group);
+
+ for (i = 0; i < args->args_count; i++) {
+ ret = arm_smmu_add_device(dev, args->args[i]);
+ if (ret) {
+ dev_err(dev,
+ "failed to add sid=%d into SMMU\n",
+ args->args[i]);
+ return ret;
+ }
+ }
} else {
u32 sid;
struct device_node *of_root;
@@ -2725,6 +2752,14 @@ static int __init arm_smmu_init(void)
if (ret)
return ret;
+ if (!iommu_present(&platform_bus_type))
+ bus_set_iommu(&platform_bus_type, &arm_smmu_ops);
+
+#ifdef CONFIG_ARM_AMBA
+ if (!iommu_present(&amba_bustype))
+ bus_set_iommu(&amba_bustype, &arm_smmu_ops);
+#endif
+
return bus_set_iommu(&pci_bus_type, &arm_smmu_ops);
}
--
1.8.0
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