unsigned long isa_io_base;
unsigned long pci_dram_offset;
-int pcibios_assign_bus_offset = 1;
-
-static u8 *pci_to_OF_bus_map;
-
-/* By default, we don't re-assign bus numbers. We do this only on
- * some pmacs
- */
-static int pci_assign_all_buses;
-
static int pci_bus_count;
-/*
- * Functions below are used on OpenFirmware machines.
- */
-static void
-make_one_node_map(struct device_node *node, u8 pci_bus)
-{
- const int *bus_range;
- int len;
-
- if (pci_bus >= pci_bus_count)
- return;
- bus_range = of_get_property(node, "bus-range", &len);
- if (bus_range == NULL || len < 2 * sizeof(int)) {
- printk(KERN_WARNING "Can't get bus-range for %s, "
- "assuming it starts at 0\n", node->full_name);
- pci_to_OF_bus_map[pci_bus] = 0;
- } else
- pci_to_OF_bus_map[pci_bus] = bus_range[0];
-
- for_each_child_of_node(node, node) {
- struct pci_dev *dev;
- const unsigned int *class_code, *reg;
-
- class_code = of_get_property(node, "class-code", NULL);
- if (!class_code ||
- ((*class_code >> 8) != PCI_CLASS_BRIDGE_PCI &&
- (*class_code >> 8) != PCI_CLASS_BRIDGE_CARDBUS))
- continue;
- reg = of_get_property(node, "reg", NULL);
- if (!reg)
- continue;
- dev = pci_get_bus_and_slot(pci_bus, ((reg[0] >> 8) & 0xff));
- if (!dev || !dev->subordinate) {
- pci_dev_put(dev);
- continue;
- }
- make_one_node_map(node, dev->subordinate->number);
- pci_dev_put(dev);
- }
-}
-
-void
-pcibios_make_OF_bus_map(void)
-{
- int i;
- struct pci_controller *hose, *tmp;
- struct property *map_prop;
- struct device_node *dn;
-
- pci_to_OF_bus_map = kmalloc(pci_bus_count, GFP_KERNEL);
- if (!pci_to_OF_bus_map) {
- printk(KERN_ERR "Can't allocate OF bus map !\n");
- return;
- }
-
- /* We fill the bus map with invalid values, that helps
- * debugging.
- */
- for (i = 0; i < pci_bus_count; i++)
- pci_to_OF_bus_map[i] = 0xff;
-
- /* For each hose, we begin searching bridges */
- list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
- struct device_node *node = hose->dn;
-
- if (!node)
- continue;
- make_one_node_map(node, hose->first_busno);
- }
- dn = of_find_node_by_path("/");
- map_prop = of_find_property(dn, "pci-OF-bus-map", NULL);
- if (map_prop) {
- BUG_ON(pci_bus_count > map_prop->length);
- memcpy(map_prop->value, pci_to_OF_bus_map, pci_bus_count);
- }
- of_node_put(dn);
-#ifdef DEBUG
- printk(KERN_INFO "PCI->OF bus map:\n");
- for (i = 0; i < pci_bus_count; i++) {
- if (pci_to_OF_bus_map[i] == 0xff)
- continue;
- printk(KERN_INFO "%d -> %d\n", i, pci_to_OF_bus_map[i]);
- }
-#endif
-}
-
-typedef int (*pci_OF_scan_iterator)(struct device_node *node, void *data);
-
-static struct device_node *scan_OF_pci_childs(struct device_node *parent,
- pci_OF_scan_iterator filter, void *data)
-{
- struct device_node *node;
- struct device_node *sub_node;
-
- for_each_child_of_node(parent, node) {
- const unsigned int *class_code;
-
- if (filter(node, data)) {
- of_node_put(node);
- return node;
- }
-
- /* For PCI<->PCI bridges or CardBus bridges, we go down
- * Note: some OFs create a parent node "multifunc-device" as
- * a fake root for all functions of a multi-function device,
- * we go down them as well.
- */
- class_code = of_get_property(node, "class-code", NULL);
- if ((!class_code ||
- ((*class_code >> 8) != PCI_CLASS_BRIDGE_PCI &&
- (*class_code >> 8) != PCI_CLASS_BRIDGE_CARDBUS)) &&
- strcmp(node->name, "multifunc-device"))
- continue;
- sub_node = scan_OF_pci_childs(node, filter, data);
- if (sub_node) {
- of_node_put(node);
- return sub_node;
- }
- }
- return NULL;
-}
-
-static struct device_node *scan_OF_for_pci_dev(struct device_node *parent,
- unsigned int devfn)
-{
- struct device_node *np, *cnp;
- const u32 *reg;
- unsigned int psize;
-
- for_each_child_of_node(parent, np) {
- reg = of_get_property(np, "reg", &psize);
- if (reg && psize >= 4 && ((reg[0] >> 8) & 0xff) == devfn)
- return np;
-
- /* Note: some OFs create a parent node "multifunc-device" as
- * a fake root for all functions of a multi-function device,
- * we go down them as well. */
- if (!strcmp(np->name, "multifunc-device")) {
- cnp = scan_OF_for_pci_dev(np, devfn);
- if (cnp)
- return cnp;
- }
- }
- return NULL;
-}
-
-
-static struct device_node *scan_OF_for_pci_bus(struct pci_bus *bus)
-{
- struct device_node *parent, *np;
-
- /* Are we a root bus ? */
- if (bus->self == NULL || bus->parent == NULL) {
- struct pci_controller *hose = pci_bus_to_host(bus);
- if (hose == NULL)
- return NULL;
- return of_node_get(hose->dn);
- }
-
- /* not a root bus, we need to get our parent */
- parent = scan_OF_for_pci_bus(bus->parent);
- if (parent == NULL)
- return NULL;
-
- /* now iterate for children for a match */
- np = scan_OF_for_pci_dev(parent, bus->self->devfn);
- of_node_put(parent);
-
- return np;
-}
-
-static int
-find_OF_pci_device_filter(struct device_node *node, void *data)
-{
- return ((void *)node == data);
-}
-
-/*
- * Returns the PCI device matching a given OF node
- */
-int
-pci_device_from_OF_node(struct device_node *node, u8 *bus, u8 *devfn)
-{
- const unsigned int *reg;
- struct pci_controller *hose;
- struct pci_dev *dev = NULL;
-
- /* Make sure it's really a PCI device */
- hose = pci_find_hose_for_OF_device(node);
- if (!hose || !hose->dn)
- return -ENODEV;
- if (!scan_OF_pci_childs(hose->dn,
- find_OF_pci_device_filter, (void *)node))
- return -ENODEV;
- reg = of_get_property(node, "reg", NULL);
- if (!reg)
- return -ENODEV;
- *bus = (reg[0] >> 16) & 0xff;
- *devfn = ((reg[0] >> 8) & 0xff);
-
- /* Ok, here we need some tweak. If we have already renumbered
- * all busses, we can't rely on the OF bus number any more.
- * the pci_to_OF_bus_map is not enough as several PCI busses
- * may match the same OF bus number.
- */
- if (!pci_to_OF_bus_map)
- return 0;
-
- for_each_pci_dev(dev)
- if (pci_to_OF_bus_map[dev->bus->number] == *bus &&
- dev->devfn == *devfn) {
- *bus = dev->bus->number;
- pci_dev_put(dev);
- return 0;
- }
-
- return -ENODEV;
-}
-EXPORT_SYMBOL(pci_device_from_OF_node);
-
-/* We create the "pci-OF-bus-map" property now so it appears in the
- * /proc device tree
- */
-void __init
-pci_create_OF_bus_map(void)
-{
- struct property *of_prop;
- struct device_node *dn;
-
- of_prop = (struct property *) alloc_bootmem(sizeof(struct property) + \
- 256);
- if (!of_prop)
- return;
- dn = of_find_node_by_path("/");
- if (dn) {
- memset(of_prop, -1, sizeof(struct property) + 256);
- of_prop->name = "pci-OF-bus-map";
- of_prop->length = 256;
- of_prop->value = &of_prop[1];
- prom_add_property(dn, of_prop);
- of_node_put(dn);
- }
-}
-
struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus)
{
struct pci_controller *hose = bus->sysdata;
printk(KERN_INFO "PCI: Probing PCI hardware\n");
- if (pci_flags & PCI_REASSIGN_ALL_BUS) {
- printk(KERN_INFO "setting pci_asign_all_busses\n");
- pci_assign_all_buses = 1;
- }
-
/* Scan all of the recorded PCI controllers. */
list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
- if (pci_assign_all_buses)
- hose->first_busno = next_busno;
hose->last_busno = 0xff;
pcibios_scan_phb(hose);
printk(KERN_INFO "calling pci_bus_add_devices()\n");
pci_bus_add_devices(hose->bus);
- if (pci_assign_all_buses || next_busno <= hose->last_busno)
- next_busno = hose->last_busno + \
- pcibios_assign_bus_offset;
+ if (next_busno <= hose->last_busno)
+ next_busno = hose->last_busno + 1;
}
pci_bus_count = next_busno;
- /* OpenFirmware based machines need a map of OF bus
- * numbers vs. kernel bus numbers since we may have to
- * remap them.
- */
- if (pci_assign_all_buses)
- pcibios_make_OF_bus_map();
-
/* Call common code to handle resource allocation */
pcibios_resource_survey();
projects / linux-beck.git / commitdiff