Hi Joerg,
On 2017-02-06 17:10, Joerg Roedel wrote:
From: Joerg Roedel <jroedel@xxxxxxx>
Register Exynos IOMMUs to the IOMMU core and make them
visible in sysfs. This patch does not add the links between
IOMMUs and translated devices yet.
Cc: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: linux-samsung-soc@xxxxxxxxxxxxxxx
Signed-off-by: Joerg Roedel <jroedel@xxxxxxx>
---
drivers/iommu/exynos-iommu.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index 57ba0d3..90f0f52 100644
--- a/drivers/iommu/exynos-iommu.c
+++ b/drivers/iommu/exynos-iommu.c
@@ -276,6 +276,8 @@ struct sysmmu_drvdata {
struct list_head owner_node; /* node for owner controllers list */
phys_addr_t pgtable; /* assigned page table structure */
unsigned int version; /* our version */
+
+ struct iommu_device iommu; /* IOMMU core handle */
};
static struct exynos_iommu_domain *to_exynos_domain(struct iommu_domain *dom)
@@ -556,6 +558,7 @@ static int __init exynos_sysmmu_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct sysmmu_drvdata *data;
struct resource *res;
+ resource_size_t ioaddr;
data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
if (!data)
@@ -565,6 +568,7 @@ static int __init exynos_sysmmu_probe(struct platform_device *pdev)
data->sfrbase = devm_ioremap_resource(dev, res);
if (IS_ERR(data->sfrbase))
return PTR_ERR(data->sfrbase);
+ ioaddr = res->start;
irq = platform_get_irq(pdev, 0);
if (irq <= 0) {
@@ -611,6 +615,18 @@ static int __init exynos_sysmmu_probe(struct platform_device *pdev)
data->sysmmu = dev;
spin_lock_init(&data->lock);
+ ret = iommu_device_sysfs_add(&data->iommu, &pdev->dev, NULL,
+ "sysmmu.%pa", &ioaddr);
Can we stick to the common name across the /sysfs and use
dev_name(data->sysmmu)
or even dev_name(dev) here?
ret = iommu_device_sysfs_add(&data->iommu, &pdev->dev, NULL,
dev_name(dev));
+ if (ret)
+ return ret;
+
+ data->iommu.ops = &exynos_iommu_ops;
+ data->iommu.fwnode = &dev->of_node->fwnode;
+
+ ret = iommu_device_register(&data->iommu);
+ if (ret)
+ return ret;
+
platform_set_drvdata(pdev, data);
__sysmmu_get_version(data);
Best regards
--
Marek Szyprowski, PhD
Samsung R&D Institute Poland
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