- conflict = insert_resource_conflict(root, res);
- if (conflict) {
- dev_err(&info->bridge->dev,
- "address space collision: host bridge window %pR "
- "conflicts with %s %pR\n",
- res, conflict->name, conflict);
- } else {
- pci_bus_add_resource(info->bus, res, 0);
- info->res_num++;
- if (addr.translation_offset)
- dev_info(&info->bridge->dev, "host bridge window %pR "
- "(PCI address [%#llx-%#llx])\n",
- res, res->start - addr.translation_offset,
- res->end - addr.translation_offset);
+ info->res_num++;
+ if (addr.translation_offset)
+ dev_info(&info->bridge->dev, "host bridge window %pR "
+ "(PCI address [%#llx-%#llx])\n",
+ res, res->start - addr.translation_offset,
+ res->end - addr.translation_offset);
+ else
+ dev_info(&info->bridge->dev, "host bridge window %pR\n", res);
+
+ return AE_OK;
+}
+
+static bool resource_contains(struct resource *res, resource_size_t point)
+{
+ if (res->start <= point && point <= res->end)
+ return true;
+ return false;
+}
+
+static void coalesce_windows(struct pci_root_info *info, int type)
+{
+ int i, j;
+ struct resource *res1, *res2;
+
+ for (i = 0; i < info->res_num; i++) {
+ res1 = &info->res[i];
+ if (!(res1->flags & type))
+ continue;
+
+ for (j = i + 1; j < info->res_num; j++) {
+ res2 = &info->res[j];
+ if (!(res2->flags & type))
+ continue;
+
+ /*
+ * I don't like throwing away windows because then
+ * our resources no longer match the ACPI _CRS, but
+ * the kernel resource tree doesn't allow overlaps.
+ */
+ if (resource_contains(res1, res2->start) ||
+ resource_contains(res1, res2->end) ||
+ resource_contains(res2, res1->start) ||
+ resource_contains(res2, res1->end)) {
+ res1->start = min(res1->start, res2->start);
+ res1->end = max(res1->end, res2->end);
+ dev_info(&info->bridge->dev,
+ "host bridge window expanded to %pR; %pR ignored\n",
+ res1, res2);
+ res2->flags = 0;
+ }
+ }
+ }
+}
+
+static void add_resources(struct pci_root_info *info)
+{
+ int i;
+ struct resource *res, *root, *conflict;
+
+ if (!pci_use_crs)
+ return;
+
+ coalesce_windows(info, IORESOURCE_MEM);
+ coalesce_windows(info, IORESOURCE_IO);
+
+ for (i = 0; i < info->res_num; i++) {
+ res = &info->res[i];
+
+ if (res->flags & IORESOURCE_MEM)
+ root = &iomem_resource;
+ else if (res->flags & IORESOURCE_IO)
+ root = &ioport_resource;