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iommu/mediatek-v1: Add def_domain_type 

The MediaTek V1 IOMMU is arm32 whose default domain type is
IOMMU_DOMAIN_UNMANAGED. Add this to satisfy the bus_iommu_probe to
enter "probe_finalize".

The iommu framework will create a iommu domain for each a device.
But all the devices share a iommu domain here, thus we skip all the
other domains in the "attach_device" except the domain we create
internally with arm_iommu_create_mapping.

Also a minor change: in the attach_device, "data" always is not null.
Remove "if (!data) return".

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Link: https://lore.kernel.org/r/1589530123-30240-1-git-send-email-yong.wu@mediatek.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Yong Wu 2020-05-15 16:08:43 +08:00 committed by Joerg Roedel
parent 5df362a53f
commit 8bbe13f52c
1 changed files with 11 additions and 5 deletions
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16
drivers/iommu/mtk_iommu_v1.c
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@ -265,10 +265,13 @@ static int mtk_iommu_attach_device(struct iommu_domain *domain,
{
struct mtk_iommu_data *data = dev_iommu_priv_get(dev);
struct mtk_iommu_domain *dom = to_mtk_domain(domain);
struct dma_iommu_mapping *mtk_mapping;
int ret;
if (!data)
return -ENODEV;
/* Only allow the domain created internally. */
mtk_mapping = data->dev->archdata.iommu;
if (mtk_mapping->domain != domain)
return 0;
if (!data->m4u_dom) {
data->m4u_dom = dom;
@ -288,9 +291,6 @@ static void mtk_iommu_detach_device(struct iommu_domain *domain,
{
struct mtk_iommu_data *data = dev_iommu_priv_get(dev);
if (!data)
return;
mtk_iommu_config(data, dev, false);
}
@ -416,6 +416,11 @@ static int mtk_iommu_create_mapping(struct device *dev,
return 0;
}
static int mtk_iommu_def_domain_type(struct device *dev)
{
return IOMMU_DOMAIN_UNMANAGED;
}
static struct iommu_device *mtk_iommu_probe_device(struct device *dev)
{
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
@ -525,6 +530,7 @@ static const struct iommu_ops mtk_iommu_ops = {
.probe_device = mtk_iommu_probe_device,
.probe_finalize = mtk_iommu_probe_finalize,
.release_device = mtk_iommu_release_device,
.def_domain_type = mtk_iommu_def_domain_type,
.device_group = generic_device_group,
.pgsize_bitmap = ~0UL << MT2701_IOMMU_PAGE_SHIFT,
};