[PATCH] pci and yenta: pcibios_bus_to_resource

In yenta_socket, we default to using the resource setting of the CardBus
bridge.  However, this is a PCI-bus-centric view of resources and thus needs
to be converted to generic resources first.  Therefore, add a call to
pcibios_bus_to_resource() call in between.  This function is a mere wrapper on
x86 and friends, however on some others it already exists, is added in this
patch (alpha, arm, ppc, ppc64) or still needs to be provided (parisc -- where
is its pcibios_resource_to_bus() ?).

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

4 files changed, 68 insertions, 0 deletions

diff --git a/arch/alpha/kernel/pci.c b/arch/alpha/kernel/pci.c
index 1f36bbd..2a8b364 100644
--- a/arch/alpha/kernel/pci.c
+++ b/arch/alpha/kernel/pci.c
@@ -350,8 +350,24 @@ pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
 	region->end = res->end - offset;
 }
 
+void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
+			     struct pci_bus_region *region)
+{
+	struct pci_controller *hose = (struct pci_controller *)dev->sysdata;
+	unsigned long offset = 0;
+
+	if (res->flags & IORESOURCE_IO)
+		offset = hose->io_space->start;
+	else if (res->flags & IORESOURCE_MEM)
+		offset = hose->mem_space->start;
+
+	res->start = region->start + offset;
+	res->end = region->end + offset;
+}
+
 #ifdef CONFIG_HOTPLUG
 EXPORT_SYMBOL(pcibios_resource_to_bus);
+EXPORT_SYMBOL(pcibios_bus_to_resource);
 #endif
 
 int
diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c
index ad26e98..c4923fa 100644
--- a/arch/arm/kernel/bios32.c
+++ b/arch/arm/kernel/bios32.c
@@ -447,9 +447,26 @@ pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
 	region->end   = res->end - offset;
 }
 
+void __devinit
+pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
+			struct pci_bus_region *region)
+{
+	struct pci_sys_data *root = dev->sysdata;
+	unsigned long offset = 0;
+
+	if (res->flags & IORESOURCE_IO)
+		offset = root->io_offset;
+	if (res->flags & IORESOURCE_MEM)
+		offset = root->mem_offset;
+
+	res->start = region->start + offset;
+	res->end   = region->end + offset;
+}
+
 #ifdef CONFIG_HOTPLUG
 EXPORT_SYMBOL(pcibios_fixup_bus);
 EXPORT_SYMBOL(pcibios_resource_to_bus);
+EXPORT_SYMBOL(pcibios_bus_to_resource);
 #endif
 
 /*
diff --git a/arch/ppc/kernel/pci.c b/arch/ppc/kernel/pci.c
index 70cfb6f..7b3586a 100644
--- a/arch/ppc/kernel/pci.c
+++ b/arch/ppc/kernel/pci.c
@@ -160,6 +160,21 @@ void pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
 }
 EXPORT_SYMBOL(pcibios_resource_to_bus);
 
+void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
+			     struct pci_bus_region *region)
+{
+	unsigned long offset = 0;
+	struct pci_controller *hose = dev->sysdata;
+
+	if (hose && res->flags & IORESOURCE_IO)
+		offset = (unsigned long)hose->io_base_virt - isa_io_base;
+	else if (hose && res->flags & IORESOURCE_MEM)
+		offset = hose->pci_mem_offset;
+	res->start = region->start + offset;
+	res->end = region->end + offset;
+}
+EXPORT_SYMBOL(pcibios_bus_to_resource);
+
 /*
  * We need to avoid collisions with `mirrored' VGA ports
  * and other strange ISA hardware, so we always want the
diff --git a/arch/ppc64/kernel/pci.c b/arch/ppc64/kernel/pci.c
index ae6f579..d0d55c7 100644
--- a/arch/ppc64/kernel/pci.c
+++ b/arch/ppc64/kernel/pci.c
@@ -108,8 +108,28 @@ void  pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region
 	region->end = res->end - offset;
 }
 
+void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
+			      struct pci_bus_region *region)
+{
+	unsigned long offset = 0;
+	struct pci_controller *hose = pci_bus_to_host(dev->bus);
+
+	if (!hose)
+		return;
+
+	if (res->flags & IORESOURCE_IO)
+	        offset = (unsigned long)hose->io_base_virt - pci_io_base;
+
+	if (res->flags & IORESOURCE_MEM)
+		offset = hose->pci_mem_offset;
+
+	res->start = region->start + offset;
+	res->end = region->end + offset;
+}
+
 #ifdef CONFIG_HOTPLUG
 EXPORT_SYMBOL(pcibios_resource_to_bus);
+EXPORT_SYMBOL(pcibios_bus_to_resource);
 #endif
 
 /*