static inline struct iommu_table *devnode_table(struct device *dev)
{
struct pci_dev *pdev;
if (!dev) {
pdev = ppc64_isabridge_dev;
if (!pdev)
return NULL;
} else
pdev = to_pci_dev(dev);
return PCI_DN(PCI_GET_DN(pdev))->iommu_table;
}
void iommu_setup_pSeries(void)
{
struct pci_dev *dev = NULL;
struct device_node *dn, *mydn;
if (systemcfg->platform == PLATFORM_PSERIES_LPAR)
iommu_buses_init_lpar(&pci_root_buses);
else
iommu_buses_init();
/* Now copy the iommu_table ptr from the bus devices down to every
* pci device_node. This means get_iommu_table() won't need to search
* up the device tree to find it.
*/
while ((dev = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
mydn = dn = PCI_GET_DN(dev);
while (dn && dn->iommu_table == NULL)
dn = dn->parent;
if (dn)
mydn->iommu_table = dn->iommu_table;
}
}
static void iommu_buses_init_lpar(struct list_head *bus_list)
{
struct list_head *ln;
struct pci_bus *bus;
struct device_node *busdn;
unsigned int *dma_window;
for (ln=bus_list->next; ln != bus_list; ln=ln->next) {
bus = pci_bus_b(ln);
busdn = PCI_GET_DN(bus);
dma_window = (unsigned int *)get_property(busdn, "ibm,dma-window", 0);
if (dma_window) {
/* Bussubno hasn't been copied yet.
* Do it now because iommu_table_setparms_lpar needs it.
*/
busdn->bussubno = bus->number;
iommu_devnode_init(busdn);
}
/* look for a window on a bridge even if the PHB had one */
iommu_buses_init_lpar(&bus->children);
}
}
