int fsl_pci_ep_vfio_init(struct pci_ep_dev *ep)
{
struct iommu_group *group;
int ret;
group = iommu_group_get(&ep->dev);
if (!group) {
group = iommu_group_alloc();
if (IS_ERR(group))
return PTR_ERR(group);
}
ret = iommu_group_add_device(group, &ep->dev);
if (ret)
pr_err("failed to add device %s to iommu group\n",
dev_name(&ep->dev));
iommu_group_put(group);
ret = vfio_add_group_dev(&ep->dev, &vfio_pci_ops, ep);
if (ret) {
pr_err("failed to add device %s to vfio system\n",
dev_name(&ep->dev));
iommu_group_put(group);
kfree(ep);
}
atomic_set(&ep->refcnt, 1);
return ret;
}
/*
* Returns the IOMMU domain id that the device belongs to.
*/
int nm_iommu_group_id(struct device *dev)
{
struct iommu_group *grp;
int id;
if (!dev)
return 0;
grp = iommu_group_get(dev);
if (!grp)
return 0;
id = iommu_group_id(grp);
return id;
}
