Re: [PATCH 3/7 v5] iommu: support iommu configuration for fsl-mc devices

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On 20/05/18 14:49, Nipun Gupta wrote:
With of_pci_map_rid available for all the busses, use the function
for configuration of devices on fsl-mc bus

FWIW I had a quick hack at factoring out the commonality with of_pci_iommu_init(), at which point I reckon this change is easier to follow as-is for the moment, so:

Reviewed-by: Robin Murphy <robin.murphy@xxxxxxx>

Signed-off-by: Nipun Gupta <nipun.gupta@xxxxxxx>
---
  drivers/iommu/of_iommu.c | 20 ++++++++++++++++++++
  1 file changed, 20 insertions(+)

diff --git a/drivers/iommu/of_iommu.c b/drivers/iommu/of_iommu.c
index 811e160..284474d 100644
--- a/drivers/iommu/of_iommu.c
+++ b/drivers/iommu/of_iommu.c
@@ -24,6 +24,7 @@
  #include <linux/of_iommu.h>
  #include <linux/of_pci.h>
  #include <linux/slab.h>
+#include <linux/fsl/mc.h>
#define NO_IOMMU 1 @@ -159,6 +160,23 @@ static int of_pci_iommu_init(struct pci_dev *pdev, u16 alias, void *data)
  	return err;
  }
+static int of_fsl_mc_iommu_init(struct fsl_mc_device *mc_dev,
+				struct device_node *master_np)
+{
+	struct of_phandle_args iommu_spec = { .args_count = 1 };
+	int err;
+
+	err = of_map_rid(master_np, mc_dev->icid, "iommu-map",
+			 "iommu-map-mask", &iommu_spec.np,
+			 iommu_spec.args);
+	if (err)
+		return err == -ENODEV ? NO_IOMMU : err;
+
+	err = of_iommu_xlate(&mc_dev->dev, &iommu_spec);
+	of_node_put(iommu_spec.np);
+	return err;
+}
+
  const struct iommu_ops *of_iommu_configure(struct device *dev,
  					   struct device_node *master_np)
  {
@@ -190,6 +208,8 @@ const struct iommu_ops *of_iommu_configure(struct device *dev,
err = pci_for_each_dma_alias(to_pci_dev(dev),
  					     of_pci_iommu_init, &info);
+	} else if (dev_is_fsl_mc(dev)) {
+		err = of_fsl_mc_iommu_init(to_fsl_mc_device(dev), master_np);
  	} else {
  		struct of_phandle_args iommu_spec;
  		int idx = 0;




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