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PCI: move host bridge-related code to host-bridge.c

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Move host bridge-related code from probe.c to a new host-bridge.c.

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 18:31:53 -07:00
committed by Bjorn Helgaas
parent 66f75a5d02
commit 610929e119
4 changed files with 97 additions and 81 deletions
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drivers/pci/probe.c
+1 -80
View File
@@ -15,13 +15,10 @@
#define CARDBUS_LATENCY_TIMER 176 /* secondary latency timer */
#define CARDBUS_RESERVE_BUSNR 3
static LIST_HEAD(pci_host_bridges);
/* Ugh. Need to stop exporting this to modules. */
LIST_HEAD(pci_root_buses);
EXPORT_SYMBOL(pci_root_buses);
static int find_anything(struct device *dev, void *data)
{
return 1;
@@ -44,82 +41,6 @@ int no_pci_devices(void)
}
EXPORT_SYMBOL(no_pci_devices);
static struct pci_host_bridge *pci_host_bridge(struct pci_dev *dev)
{
struct pci_bus *bus;
struct pci_host_bridge *bridge;
bus = dev->bus;
while (bus->parent)
bus = bus->parent;
list_for_each_entry(bridge, &pci_host_bridges, list) {
if (bridge->bus == bus)
return bridge;
}
return NULL;
}
static bool resource_contains(struct resource *res1, struct resource *res2)
{
return res1->start <= res2->start && res1->end >= res2->end;
}
void pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
struct resource *res)
{
struct pci_host_bridge *bridge = pci_host_bridge(dev);
struct pci_host_bridge_window *window;
resource_size_t offset = 0;
list_for_each_entry(window, &bridge->windows, list) {
if (resource_type(res) != resource_type(window->res))
continue;
if (resource_contains(window->res, res)) {
offset = window->offset;
break;
}
}
region->start = res->start - offset;
region->end = res->end - offset;
}
EXPORT_SYMBOL(pcibios_resource_to_bus);
static bool region_contains(struct pci_bus_region *region1,
struct pci_bus_region *region2)
{
return region1->start <= region2->start && region1->end >= region2->end;
}
void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
struct pci_bus_region *region)
{
struct pci_host_bridge *bridge = pci_host_bridge(dev);
struct pci_host_bridge_window *window;
struct pci_bus_region bus_region;
resource_size_t offset = 0;
list_for_each_entry(window, &bridge->windows, list) {
if (resource_type(res) != resource_type(window->res))
continue;
bus_region.start = window->res->start - window->offset;
bus_region.end = window->res->end - window->offset;
if (region_contains(&bus_region, region)) {
offset = window->offset;
break;
}
}
res->start = region->start + offset;
res->end = region->end + offset;
}
EXPORT_SYMBOL(pcibios_bus_to_resource);
/*
* PCI Bus Class
*/
@@ -1732,7 +1653,7 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
}
down_write(&pci_bus_sem);
list_add_tail(&bridge->list, &pci_host_bridges);
add_to_pci_host_bridges(bridge);
list_add_tail(&b->node, &pci_root_buses);
up_write(&pci_bus_sem);