x86/PCI: dynamically allocate pci_root_info for native host bridge drivers
This dynamically allocates struct pci_root_info instead of using a
static array.
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
diff --git a/arch/x86/pci/bus_numa.c b/arch/x86/pci/bus_numa.c
index fd3f655..306579f 100644
--- a/arch/x86/pci/bus_numa.c
+++ b/arch/x86/pci/bus_numa.c
@@ -4,35 +4,38 @@
#include "bus_numa.h"
-int pci_root_num;
-struct pci_root_info pci_root_info[PCI_ROOT_NR];
+LIST_HEAD(pci_root_infos);
+
+static struct pci_root_info *x86_find_pci_root_info(int bus)
+{
+ struct pci_root_info *info;
+
+ if (list_empty(&pci_root_infos))
+ return NULL;
+
+ list_for_each_entry(info, &pci_root_infos, list)
+ if (info->bus_min == bus)
+ return info;
+
+ return NULL;
+}
void x86_pci_root_bus_resources(int bus, struct list_head *resources)
{
- int i;
- int j;
- struct pci_root_info *info;
+ struct pci_root_info *info = x86_find_pci_root_info(bus);
+ struct pci_root_res *root_res;
- if (!pci_root_num)
- goto default_resources;
-
- for (i = 0; i < pci_root_num; i++) {
- if (pci_root_info[i].bus_min == bus)
- break;
- }
-
- if (i == pci_root_num)
+ if (!info)
goto default_resources;
printk(KERN_DEBUG "PCI: root bus %02x: hardware-probed resources\n",
bus);
- info = &pci_root_info[i];
- for (j = 0; j < info->res_num; j++) {
+ list_for_each_entry(root_res, &info->resources, list) {
struct resource *res;
struct resource *root;
- res = &info->res[j];
+ res = &root_res->res;
pci_add_resource(resources, res);
if (res->flags & IORESOURCE_IO)
root = &ioport_resource;
@@ -53,11 +56,32 @@
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;
+
+ INIT_LIST_HEAD(&info->resources);
+ info->bus_min = bus_min;
+ info->bus_max = bus_max;
+ info->node = node;
+ info->link = link;
+
+ list_add_tail(&info->list, &pci_root_infos);
+
+ return info;
+}
+
void __devinit update_res(struct pci_root_info *info, resource_size_t start,
resource_size_t end, unsigned long flags, int merge)
{
- int i;
struct resource *res;
+ struct pci_root_res *root_res;
if (start > end)
return;
@@ -69,11 +93,11 @@
goto addit;
/* try to merge it with old one */
- for (i = 0; i < info->res_num; i++) {
+ list_for_each_entry(root_res, &info->resources, list) {
resource_size_t final_start, final_end;
resource_size_t common_start, common_end;
- res = &info->res[i];
+ res = &root_res->res;
if (res->flags != flags)
continue;
@@ -93,14 +117,15 @@
addit:
/* need to add that */
- if (info->res_num >= RES_NUM)
+ root_res = kzalloc(sizeof(*root_res), GFP_KERNEL);
+ if (!root_res)
return;
- res = &info->res[info->res_num];
+ res = &root_res->res;
res->name = info->name;
res->flags = flags;
res->start = start;
res->end = end;
- res->child = NULL;
- info->res_num++;
+
+ list_add_tail(&root_res->list, &info->resources);
}