void
iommu_init(void)
{
int error, bus, slot, func;
vm_paddr_t maxaddr;
const char *name;
device_t dev;
if (vmm_is_intel())
ops = &iommu_ops_intel;
else if (vmm_is_amd())
ops = &iommu_ops_amd;
else
ops = NULL;
error = IOMMU_INIT();
if (error)
return;
iommu_avail = 1;
/*
* Create a domain for the devices owned by the host
*/
maxaddr = vmm_mem_maxaddr();
host_domain = IOMMU_CREATE_DOMAIN(maxaddr);
if (host_domain == NULL)
panic("iommu_init: unable to create a host domain");
/*
* Create 1:1 mappings from '0' to 'maxaddr' for devices assigned to
* the host
*/
iommu_create_mapping(host_domain, 0, 0, maxaddr);
for (bus = 0; bus <= PCI_BUSMAX; bus++) {
for (slot = 0; slot <= PCI_SLOTMAX; slot++) {
for (func = 0; func <= PCI_FUNCMAX; func++) {
dev = pci_find_dbsf(0, bus, slot, func);
if (dev == NULL)
continue;
/* skip passthrough devices */
name = device_get_name(dev);
if (name != NULL && strcmp(name, "ppt") == 0)
continue;
/* everything else belongs to the host domain */
iommu_add_device(host_domain, bus, slot, func);
}
}
}
IOMMU_ENABLE();
}
static void pnv_pci_p5ioc2_dma_dev_setup(struct pnv_phb *phb,
struct pci_dev *pdev)
{
struct iommu_table *tbl = phb->p5ioc2.table_group.tables[0];
if (!tbl->it_map) {
tbl->it_ops = &pnv_p5ioc2_iommu_ops;
iommu_init_table(tbl, phb->hose->node);
iommu_register_group(&phb->p5ioc2.table_group,
pci_domain_nr(phb->hose->bus), phb->opal_id);
INIT_LIST_HEAD_RCU(&tbl->it_group_list);
pnv_pci_link_table_and_group(phb->hose->node, 0,
tbl, &phb->p5ioc2.table_group);
}
set_iommu_table_base(&pdev->dev, tbl);
iommu_add_device(&pdev->dev);
}
int
ppt_assign_device(struct vm *vm, int bus, int slot, int func)
{
struct pptdev *ppt;
ppt = ppt_find(bus, slot, func);
if (ppt != NULL) {
/*
* If this device is owned by a different VM then we
* cannot change its owner.
*/
if (ppt->vm != NULL && ppt->vm != vm)
return (EBUSY);
ppt->vm = vm;
iommu_add_device(vm_iommu_domain(vm), bus, slot, func);
return (0);
}
return (ENOENT);
}
