#include <linux/init.h> #include <linux/pci.h> #include <linux/range.h> #include "bus_numa.h" LIST_HEAD(pci_root_infos); static struct pci_root_info *x86_find_pci_root_info(int bus) { struct pci_root_info *info; list_for_each_entry(info, &pci_root_infos, list) if (info->busn.start == bus) return info; return NULL; } int x86_pci_root_bus_node(int bus) { struct pci_root_info *info = x86_find_pci_root_info(bus); if (!info) return NUMA_NO_NODE; return info->node; } void x86_pci_root_bus_resources(int bus, struct list_head *resources) { struct pci_root_info *info = x86_find_pci_root_info(bus); struct pci_root_res *root_res; struct pci_host_bridge_window *window; bool found = false; if (!info) goto default_resources; printk(KERN_DEBUG "PCI: root bus %02x: hardware-probed resources\n", bus); /* already added by acpi ? */ list_for_each_entry(window, resources, list) if (window->res->flags & IORESOURCE_BUS) { found = true; break; } if (!found) pci_add_resource(resources, &info->busn); list_for_each_entry(root_res, &info->resources, list) { struct resource *res; struct resource *root; res = &root_res->res; pci_add_resource(resources, res); if (res->flags & IORESOURCE_IO) root = &ioport_resource; else root = &iomem_resource; insert_resource(root, res); } return; default_resources: /* * We don't have any host bridge aperture information from the * "native host bridge drivers," e.g., amd_bus or broadcom_bus, * so fall back to the defaults historically used by pci_create_bus(). */ printk(KERN_DEBUG "PCI: root bus %02x: using default resources\n", bus); pci_add_resource(resources, &ioport_resource); pci_add_resource(resources, &iomem_resource); } struct pci_root_info __init *alloc_pci_root_info(int bus_min, int bus_max, int node, int link) { struct pci_root_info *info; info = kzalloc(sizeof(*info), GFP_KERNEL); if (!info) return info; sprintf(info->name, "PCI Bus #%02x", bus_min); INIT_LIST_HEAD(&info->resources); info->busn.name = info->name; info->busn.start = bus_min; info->busn.end = bus_max; info->busn.flags = IORESOURCE_BUS; info->node = node; info->link = link; list_add_tail(&info->list, &pci_root_infos); return info; } void update_res(struct pci_root_info *info, resource_size_t start, resource_size_t end, unsigned long flags, int merge) { struct resource *res; struct pci_root_res *root_res; if (start > end) return; if (start == MAX_RESOURCE) return; if (!merge) goto addit; /* try to merge it with old one */ list_for_each_entry(root_res, &info->resources, list) { resource_size_t final_start, final_end; resource_size_t common_start, common_end; res = &root_res->res; if (res->flags != flags) continue; common_start = max(res->start, start); common_end = min(res->end, end); if (common_start > common_end + 1) continue; final_start = min(res->start, start); final_end = max(res->end, end); res->start = final_start; res->end = final_end; return; } addit: /* need to add that */ root_res = kzalloc(sizeof(*root_res), GFP_KERNEL); if (!root_res) return; res = &root_res->res; res->name = info->name; res->flags = flags; res->start = start; res->end = end; list_add_tail(&root_res->list, &info->resources); }