For allocating resource under bus path, we do have dev pass along,
and we could just use bus instead. Also, we'd like to make function
find_pci_host_bridge() global so that some platforms (e.g. PPC) can
access the pci host bridge directly.
Signed-off-by: Yinghai Lu <ying...@kernel.org>
---
drivers/pci/host-bridge.c | 34 +++++++++++++++++++++-------------
include/linux/pci.h | 4 ++++
2 files changed, 25 insertions(+), 13 deletions(-)
diff --git a/drivers/pci/host-bridge.c b/drivers/pci/host-bridge.c
index a68dc61..4ccf477 100644
--- a/drivers/pci/host-bridge.c
+++ b/drivers/pci/host-bridge.c
@@ -9,22 +9,19 @@
#include "pci.h"
-static struct pci_bus *find_pci_root_bus(struct pci_dev *dev)
+static struct pci_bus *find_pci_root_bus(struct pci_bus *bus)
{
- struct pci_bus *bus;
-
- bus = dev->bus;
while (bus->parent)
bus = bus->parent;
return bus;
}
-static struct pci_host_bridge *find_pci_host_bridge(struct pci_dev *dev)
+struct pci_host_bridge *find_pci_host_bridge(struct pci_bus *bus)
{
- struct pci_bus *bus = find_pci_root_bus(dev);
+ struct pci_bus *root_bus = find_pci_root_bus(bus);
- return to_pci_host_bridge(bus->bridge);
+ return to_pci_host_bridge(root_bus->bridge);
}
void pci_set_host_bridge_release(struct pci_host_bridge *bridge,
@@ -40,10 +37,11 @@ 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)
+void __pcibios_resource_to_bus(struct pci_bus *bus,
+ struct pci_bus_region *region,
+ struct resource *res)
{
- struct pci_host_bridge *bridge = find_pci_host_bridge(dev);
+ struct pci_host_bridge *bridge = find_pci_host_bridge(bus);
struct pci_host_bridge_window *window;
resource_size_t offset = 0;
@@ -60,6 +58,11 @@ void pcibios_resource_to_bus(struct pci_dev *dev, struct
pci_bus_region *region,
region->start = res->start - offset;
region->end = res->end - offset;
}
+void pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region
*region,
+ struct resource *res)
+{
+ __pcibios_resource_to_bus(dev->bus, region, res);
+}
EXPORT_SYMBOL(pcibios_resource_to_bus);
static bool region_contains(struct pci_bus_region *region1,
@@ -68,10 +71,10 @@ static bool region_contains(struct pci_bus_region *region1,
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)
+static void __pcibios_bus_to_resource(struct pci_bus *bus, struct resource
*res,
+ struct pci_bus_region *region)
{
- struct pci_host_bridge *bridge = find_pci_host_bridge(dev);
+ struct pci_host_bridge *bridge = find_pci_host_bridge(bus);
struct pci_host_bridge_window *window;
resource_size_t offset = 0;
@@ -93,4 +96,9 @@ void pcibios_bus_to_resource(struct pci_dev *dev, struct
resource *res,
res->start = region->start + offset;
res->end = region->end + offset;
}
+void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
+ struct pci_bus_region *region)
+{
+ __pcibios_bus_to_resource(dev->bus, res, region);
+}
EXPORT_SYMBOL(pcibios_bus_to_resource);
diff --git a/include/linux/pci.h b/include/linux/pci.h
index fefb4e1..2b559f1 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -385,6 +385,7 @@ struct pci_host_bridge {
};
#define to_pci_host_bridge(n) container_of(n, struct pci_host_bridge,
dev)
+struct pci_host_bridge *find_pci_host_bridge(struct pci_bus *bus);
void pci_set_host_bridge_release(struct pci_host_bridge *bridge,
void (*release_fn)(struct pci_host_bridge *),
void *release_data);
@@ -657,6 +658,9 @@ void pci_fixup_cardbus(struct pci_bus *);
/* Generic PCI functions used internally */
+void __pcibios_resource_to_bus(struct pci_bus *bus,
+ struct pci_bus_region *region,
+ struct resource *res);
void pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region
*region,
struct resource *res);
void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
--
1.7.9.5
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