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authorMarek Szyprowski <m.szyprowski@samsung.com>2016-02-18 15:12:48 +0100
committerJoerg Roedel <jroedel@suse.de>2016-02-25 15:32:08 +0100
commit6c2ae7e2916b028bd4c0fff04589bd176487a122 (patch)
tree4e76d6838f98bb77ea13e6acfcf8959892570895 /drivers/iommu/exynos-iommu.c
parent81f70ba233d5f660e1ea5fe23260ee323af5d53a (diff)
downloadlinux-6c2ae7e2916b028bd4c0fff04589bd176487a122.tar.bz2
iommu/exynos: Rework iommu group initialization
This patch replaces custom code in add_device implementation with iommu_group_get_for_dev() call and provides the needed callback. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/exynos-iommu.c')
-rw-r--r--drivers/iommu/exynos-iommu.c27
1 files changed, 16 insertions, 11 deletions
diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index 97c41b8ab5d9..4fc079073c86 100644
--- a/drivers/iommu/exynos-iommu.c
+++ b/drivers/iommu/exynos-iommu.c
@@ -1114,28 +1114,32 @@ static phys_addr_t exynos_iommu_iova_to_phys(struct iommu_domain *iommu_domain,
return phys;
}
+static struct iommu_group *get_device_iommu_group(struct device *dev)
+{
+ struct iommu_group *group;
+
+ group = iommu_group_get(dev);
+ if (!group)
+ group = iommu_group_alloc();
+
+ return group;
+}
+
static int exynos_iommu_add_device(struct device *dev)
{
struct iommu_group *group;
- int ret;
if (!has_sysmmu(dev))
return -ENODEV;
- group = iommu_group_get(dev);
+ group = iommu_group_get_for_dev(dev);
- if (!group) {
- group = iommu_group_alloc();
- if (IS_ERR(group)) {
- dev_err(dev, "Failed to allocate IOMMU group\n");
- return PTR_ERR(group);
- }
- }
+ if (IS_ERR(group))
+ return PTR_ERR(group);
- ret = iommu_group_add_device(group, dev);
iommu_group_put(group);
- return ret;
+ return 0;
}
static void exynos_iommu_remove_device(struct device *dev)
@@ -1182,6 +1186,7 @@ static struct iommu_ops exynos_iommu_ops = {
.unmap = exynos_iommu_unmap,
.map_sg = default_iommu_map_sg,
.iova_to_phys = exynos_iommu_iova_to_phys,
+ .device_group = get_device_iommu_group,
.add_device = exynos_iommu_add_device,
.remove_device = exynos_iommu_remove_device,
.pgsize_bitmap = SECT_SIZE | LPAGE_SIZE | SPAGE_SIZE,