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x86/PCI: dynamically allocate pci_root_info for native host bridge drivers

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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>
This commit is contained in:
Yinghai Lu
2012-04-02 18:31:54 -07:00
committed by Bjorn Helgaas
parent 35cb05e5bd
commit d28e5ac2a0
4 changed files with 90 additions and 89 deletions
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73
arch/x86/pci/bus_numa.c
View File

@@ -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 @@ default_resources:
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 @@ void __devinit update_res(struct pci_root_info *info, resource_size_t start,
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 @@ void __devinit update_res(struct pci_root_info *info, resource_size_t start,
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);
}