===================================================================
@@ -53,17 +53,15 @@ static int __ref pciehp_add_bridge(struc
busnr = pci_scan_bridge(parent, dev, busnr, pass);
if (!dev->subordinate)
return -1;
- pci_bus_size_bridges(dev->subordinate);
- pci_bus_assign_resources(parent);
- pci_enable_bridges(parent);
- pci_bus_add_devices(parent);
+
return 0;
}
int pciehp_configure_device(struct slot *p_slot)
{
struct pci_dev *dev;
- struct pci_bus *parent = p_slot->ctrl->pcie->port->subordinate;
+ struct pci_dev *bridge = p_slot->ctrl->pcie->port;
+ struct pci_bus *parent = bridge->subordinate;
int num, fn;
struct controller *ctrl = p_slot->ctrl;
@@ -96,12 +94,25 @@ int pciehp_configure_device(struct slot
(dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)) {
pciehp_add_bridge(dev);
}
+ pci_dev_put(dev);
+ }
+
+ pci_assign_unassigned_bridge_resources(bridge);
+
+ for (fn = 0; fn < 8; fn++) {
+ dev = pci_get_slot(parent, PCI_DEVFN(0, fn));
+ if (!dev)
+ continue;
+ if ((dev->class >> 16) == PCI_BASE_CLASS_DISPLAY) {
+ pci_dev_put(dev);
+ continue;
+ }
pci_configure_slot(dev);
pci_dev_put(dev);
}
- pci_bus_assign_resources(parent);
pci_bus_add_devices(parent);
+
return 0;
}
===================================================================
@@ -68,6 +68,52 @@ static void free_failed_list(struct reso
head->next = NULL;
}
+static void pdev_assign_resources_sorted(struct pci_dev *dev,
+ struct resource_list *fail_head)
+{
+ struct resource *res;
+ struct resource_list head, *list, *tmp;
+ int idx;
+ u16 class = dev->class >> 8;
+
+ head.next = NULL;
+
+ /* Don't touch classless devices or host bridges or ioapics. */
+ if (class == PCI_CLASS_NOT_DEFINED || class == PCI_CLASS_BRIDGE_HOST)
+ return;
+
+ /* Don't touch ioapic devices already enabled by firmware */
+ if (class == PCI_CLASS_SYSTEM_PIC) {
+ u16 command;
+ pci_read_config_word(dev, PCI_COMMAND, &command);
+ if (command & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY))
+ return;
+ }
+
+ pdev_sort_resources(dev, &head);
+
+ for (list = head.next; list;) {
+ res = list->res;
+ idx = res - &list->dev->resource[0];
+ if (pci_assign_resource(list->dev, idx)) {
+ if (fail_head && !list->dev->subordinate &&
+ !pci_is_root_bus(list->dev->bus)) {
+ /*
+ * device need to keep flags and size
+ * for second try
+ */
+ add_to_failed_list(fail_head, list->dev, res);
+ } else {
+ res->start = 0;
+ res->end = 0;
+ res->flags = 0;
+ }
+ }
+ tmp = list;
+ list = list->next;
+ kfree(tmp);
+ }
+}
static void pbus_assign_resources_sorted(const struct pci_bus *bus,
struct resource_list *fail_head)
{
@@ -282,9 +328,6 @@ static void __pci_setup_bridge(struct pc
{
struct pci_dev *bridge = bus->self;
- if (pci_is_enabled(bridge))
- return;
-
dev_info(&bridge->dev, "PCI bridge to [bus %02x-%02x]\n",
bus->secondary, bus->subordinate);
@@ -645,7 +688,8 @@ static void __ref __pci_bus_assign_resou
switch (dev->class >> 8) {
case PCI_CLASS_BRIDGE_PCI:
- pci_setup_bridge(b);
+ if (!pci_is_enabled(dev))
+ pci_setup_bridge(b);
break;
case PCI_CLASS_BRIDGE_CARDBUS:
@@ -666,6 +710,34 @@ void __ref pci_bus_assign_resources(cons
}
EXPORT_SYMBOL(pci_bus_assign_resources);
+static void __ref __pci_bridge_assign_resources(const struct pci_dev *bridge,
+ struct resource_list *fail_head)
+{
+ struct pci_bus *b;
+
+ pdev_assign_resources_sorted((struct pci_dev *)bridge, fail_head);
+
+ b = bridge->subordinate;
+ if (!b)
+ return;
+
+ __pci_bus_assign_resources(b, fail_head);
+
+ switch (bridge->class >> 8) {
+ case PCI_CLASS_BRIDGE_PCI:
+ pci_setup_bridge(b);
+ break;
+
+ case PCI_CLASS_BRIDGE_CARDBUS:
+ pci_setup_cardbus(b);
+ break;
+
+ default:
+ dev_info(&bridge->dev, "not setting up bridge for bus "
+ "%04x:%02x\n", pci_domain_nr(b), b->number);
+ break;
+ }
+}
static void release_children_resource(struct resource *r)
{
struct resource *p;
@@ -841,3 +913,53 @@ enable_and_dump:
pci_bus_dump_resources(bus);
}
}
+
+void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge)
+{
+ struct pci_bus *bus;
+ struct pci_bus *parent = bridge->subordinate;
+ bool second_tried = false;
+ struct resource_list head, *list, *tmp;
+ int retval;
+ unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM |
+ IORESOURCE_PREFETCH;
+
+again:
+ head.next = NULL;
+
+ pci_bus_size_bridges(parent);
+ pci_clear_master(bridge);
+ __pci_bridge_assign_resources(bridge, &head);
+ retval = pci_reenable_device(bridge);
+ pci_set_master(bridge);
+ pci_enable_bridges(parent);
+
+ /* any device complain? */
+ if (!head.next)
+ return;
+
+ if (second_tried) {
+ /* still fail, don't want to try more */
+ free_failed_list(&head);
+ return;
+ }
+
+ second_tried = true;
+ printk(KERN_DEBUG "PCI: second try to assign unassigned res\n");
+
+ /*
+ * Try to release leaf bridge's resources that doesn't fit resource of
+ * child device under that bridge
+ */
+ for (list = head.next; list;) {
+ bus = list->dev->bus;
+ pci_bus_release_unused_bridge_res(bus,
+ list->res->flags & type_mask);
+ tmp = list;
+ list = list->next;
+ kfree(tmp);
+ }
+
+ goto again;
+}
+EXPORT_SYMBOL_GPL(pci_assign_unassigned_bridge_resources);
===================================================================
@@ -768,6 +768,7 @@ void pci_bus_assign_resources(const stru
void pci_bus_size_bridges(struct pci_bus *bus);
int pci_claim_resource(struct pci_dev *, int);
void pci_assign_unassigned_resources(void);
+void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge);
void pdev_enable_device(struct pci_dev *);
void pdev_sort_resources(struct pci_dev *, struct resource_list *);
int pci_enable_resources(struct pci_dev *, int mask);