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iommu/amd: Put IOMMUv2 devices in a direct mapped domain 

A device that might be used for HSA needs to be in a direct
mapped domain so that all DMA-API mappings stay alive when
the IOMMUv2 stack is used.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Joerg Roedel 2015-05-28 18:41:42 +02:00
parent 07f643a35d
commit 07ee86948c
1 changed files with 14 additions and 1 deletions
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15
drivers/iommu/amd_iommu.c
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@ -2253,6 +2253,8 @@ static void detach_device(struct device *dev)
static int amd_iommu_add_device(struct device *dev)
{
struct iommu_dev_data *dev_data;
struct iommu_domain *domain;
struct amd_iommu *iommu;
u16 devid;
int ret;
@ -2270,7 +2272,18 @@ static int amd_iommu_add_device(struct device *dev)
}
init_iommu_group(dev);
dev->archdata.dma_ops = &amd_iommu_dma_ops;
dev_data = get_dev_data(dev);
if (dev_data && dev_data->iommu_v2)
iommu_request_dm_for_dev(dev);
/* Domains are initialized for this device - have a look what we ended up with */
domain = iommu_get_domain_for_dev(dev);
if (domain->type == IOMMU_DOMAIN_IDENTITY) {
dev_data->passthrough = true;
dev->archdata.dma_ops = &nommu_dma_ops;
} else {
dev->archdata.dma_ops = &amd_iommu_dma_ops;
}
out:
iommu_completion_wait(iommu);