iommu/rockchip: Support sharing IOMMU between masters
There would be some masters sharing the same IOMMU device. Put them in the same iommu group and share the same iommu domain. Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com> Reviewed-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
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@ -104,6 +104,7 @@ struct rk_iommu {
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struct iommu_device iommu;
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struct list_head node; /* entry in rk_iommu_domain.iommus */
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struct iommu_domain *domain; /* domain to which iommu is attached */
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struct iommu_group *group;
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};
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struct rk_iommudata {
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@ -1073,6 +1074,15 @@ static void rk_iommu_remove_device(struct device *dev)
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iommu_group_remove_device(dev);
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}
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static struct iommu_group *rk_iommu_device_group(struct device *dev)
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{
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struct rk_iommu *iommu;
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iommu = rk_iommu_from_dev(dev);
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return iommu_group_ref_get(iommu->group);
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}
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static int rk_iommu_of_xlate(struct device *dev,
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struct of_phandle_args *args)
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{
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@ -1104,7 +1114,7 @@ static const struct iommu_ops rk_iommu_ops = {
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.add_device = rk_iommu_add_device,
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.remove_device = rk_iommu_remove_device,
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.iova_to_phys = rk_iommu_iova_to_phys,
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.device_group = generic_device_group,
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.device_group = rk_iommu_device_group,
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.pgsize_bitmap = RK_IOMMU_PGSIZE_BITMAP,
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.of_xlate = rk_iommu_of_xlate,
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};
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@ -1173,9 +1183,15 @@ static int rk_iommu_probe(struct platform_device *pdev)
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if (err)
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return err;
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iommu->group = iommu_group_alloc();
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if (IS_ERR(iommu->group)) {
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err = PTR_ERR(iommu->group);
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goto err_unprepare_clocks;
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}
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err = iommu_device_sysfs_add(&iommu->iommu, dev, NULL, dev_name(dev));
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if (err)
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goto err_unprepare_clocks;
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goto err_put_group;
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iommu_device_set_ops(&iommu->iommu, &rk_iommu_ops);
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iommu_device_set_fwnode(&iommu->iommu, &dev->of_node->fwnode);
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@ -1199,6 +1215,8 @@ static int rk_iommu_probe(struct platform_device *pdev)
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return 0;
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err_remove_sysfs:
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iommu_device_sysfs_remove(&iommu->iommu);
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err_put_group:
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iommu_group_put(iommu->group);
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err_unprepare_clocks:
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clk_bulk_unprepare(iommu->num_clocks, iommu->clocks);
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return err;
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