summaryrefslogtreecommitdiffstats
path: root/arch/x86/pci/bus_numa.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/pci/bus_numa.c')
-rw-r--r--arch/x86/pci/bus_numa.c101
1 files changed, 101 insertions, 0 deletions
diff --git a/arch/x86/pci/bus_numa.c b/arch/x86/pci/bus_numa.c
new file mode 100644
index 000000000000..145df00e0387
--- /dev/null
+++ b/arch/x86/pci/bus_numa.c
@@ -0,0 +1,101 @@
+#include <linux/init.h>
+#include <linux/pci.h>
+
+#include "bus_numa.h"
+
+int pci_root_num;
+struct pci_root_info pci_root_info[PCI_ROOT_NR];
+int found_all_numa_early;
+
+void x86_pci_root_bus_res_quirks(struct pci_bus *b)
+{
+ int i;
+ int j;
+ struct pci_root_info *info;
+
+ /* don't go for it if _CRS is used already */
+ if (b->resource[0] != &ioport_resource ||
+ b->resource[1] != &iomem_resource)
+ return;
+
+ if (!pci_root_num)
+ return;
+
+ /* for amd, if only one root bus, don't need to do anything */
+ if (pci_root_num < 2 && found_all_numa_early)
+ return;
+
+ for (i = 0; i < pci_root_num; i++) {
+ if (pci_root_info[i].bus_min == b->number)
+ break;
+ }
+
+ if (i == pci_root_num)
+ return;
+
+ printk(KERN_DEBUG "PCI: peer root bus %02x res updated from pci conf\n",
+ b->number);
+
+ info = &pci_root_info[i];
+ for (j = 0; j < info->res_num; j++) {
+ struct resource *res;
+ struct resource *root;
+
+ res = &info->res[j];
+ b->resource[j] = res;
+ if (res->flags & IORESOURCE_IO)
+ root = &ioport_resource;
+ else
+ root = &iomem_resource;
+ insert_resource(root, res);
+ }
+}
+
+void __init update_res(struct pci_root_info *info, size_t start,
+ size_t end, unsigned long flags, int merge)
+{
+ int i;
+ struct resource *res;
+
+ if (start > end)
+ return;
+
+ if (!merge)
+ goto addit;
+
+ /* try to merge it with old one */
+ for (i = 0; i < info->res_num; i++) {
+ size_t final_start, final_end;
+ size_t common_start, common_end;
+
+ res = &info->res[i];
+ if (res->flags != flags)
+ continue;
+
+ common_start = max((size_t)res->start, start);
+ common_end = min((size_t)res->end, end);
+ if (common_start > common_end + 1)
+ continue;
+
+ final_start = min((size_t)res->start, start);
+ final_end = max((size_t)res->end, end);
+
+ res->start = final_start;
+ res->end = final_end;
+ return;
+ }
+
+addit:
+
+ /* need to add that */
+ if (info->res_num >= RES_NUM)
+ return;
+
+ res = &info->res[info->res_num];
+ res->name = info->name;
+ res->flags = flags;
+ res->start = start;
+ res->end = end;
+ res->child = NULL;
+ info->res_num++;
+}
OpenPOWER on IntegriCloud