[PATCH 16/25] [POWERPC] Provide ability to setup P2P bridge registers from struct resource

[Kumar Gala]

We need the ability to set P2P bridge registers to properly setup the virtual
P2P bridges that exist in PCIe controllers for some of the embedded setups.

Signed-off-by: Kumar Gala <galak at kernel.crashing.org>
---
 arch/powerpc/kernel/pci_32.c     |   18 ++++++++++++------
 include/asm-powerpc/pci-bridge.h |    2 ++
 2 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/arch/powerpc/kernel/pci_32.c b/arch/powerpc/kernel/pci_32.c
index bfcfa14..721a694 100644
--- a/arch/powerpc/kernel/pci_32.c
+++ b/arch/powerpc/kernel/pci_32.c
@@ -415,15 +415,13 @@ probe_resource(struct pci_bus *parent, struct resource *pr,
 	return 0;
 }
 
-static void __init
-update_bridge_base(struct pci_bus *bus, int i)
+void __init
+update_bridge_resource(struct pci_dev *dev, struct resource *res)
 {
-	struct resource *res = bus->resource[i];
 	u8 io_base_lo, io_limit_lo;
 	u16 mem_base, mem_limit;
 	u16 cmd;
 	unsigned long start, end, off;
-	struct pci_dev *dev = bus->self;
 	struct pci_controller *hose = dev->sysdata;
 
 	if (!hose) {
@@ -467,12 +465,20 @@ update_bridge_base(struct pci_bus *bus, int i)
 		pci_write_config_word(dev, PCI_PREF_MEMORY_LIMIT, mem_limit);
 
 	} else {
-		DBG(KERN_ERR "PCI: ugh, bridge %s res %d has flags=%lx\n",
-		    pci_name(dev), i, res->flags);
+		DBG(KERN_ERR "PCI: ugh, bridge %s res has flags=%lx\n",
+		    pci_name(dev), res->flags);
 	}
 	pci_write_config_word(dev, PCI_COMMAND, cmd);
 }
 
+static void __init
+update_bridge_base(struct pci_bus *bus, int i)
+{
+	struct resource *res = bus->resource[i];
+	struct pci_dev *dev = bus->self;
+	update_bridge_resource(dev, res);
+}
+
 static inline void alloc_resource(struct pci_dev *dev, int idx)
 {
 	struct resource *pr, *r = &dev->resource[idx];
diff --git a/include/asm-powerpc/pci-bridge.h b/include/asm-powerpc/pci-bridge.h
index 435bfe8..b7d2ea4 100644
--- a/include/asm-powerpc/pci-bridge.h
+++ b/include/asm-powerpc/pci-bridge.h
@@ -93,6 +93,8 @@ extern int early_find_capability(struct pci_controller *hose, int bus,
 extern void setup_indirect_pci(struct pci_controller* hose,
 			       u32 cfg_addr, u32 cfg_data, u32 flags);
 extern void setup_grackle(struct pci_controller *hose);
+extern void __init update_bridge_resource(struct pci_dev *dev,
+					  struct resource *res);
 
 #else
 
-- 
1.5.2.2