Commit 36a66cd6 authored by Bjorn Helgaas's avatar Bjorn Helgaas
Browse files

PCI: add generic pcibios_resource_to_bus() 



This replaces the generic versions of pcibios_resource_to_bus() and
pcibios_bus_to_resource() in asm-generic/pci.h with versions that use
pci_resource_to_bus() and pci_bus_to_resource().

The replacements are equivalent except that they can apply host
bridge window offsets when the arch has supplied them by using
pci_add_resource_offset().

Each arch can convert to using pci_add_resource_offset() individually by
removing its device resource fixups from pcibios_fixup_bus() and supplying
ARCH_HAS_GENERIC_PCI_OFFSETS.  ARCH_HAS_GENERIC_PCI_OFFSETS can be removed
after all have converted.

Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
parent 5bfa14ed

drivers/pci/probe.c

+16 −0
Original line number Diff line number Diff line
@@ -118,6 +118,22 @@ void pci_bus_to_resource(struct pci_dev *dev, struct resource *res, 
	res->end = region->end + offset;

}



#ifdef ARCH_HAS_GENERIC_PCI_OFFSETS

void pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,

			     struct resource *res)

{

	pci_resource_to_bus(dev, region, res);

}

EXPORT_SYMBOL(pcibios_resource_to_bus);



void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,

			     struct pci_bus_region *region)

{

	pci_bus_to_resource(dev, res, region);

}

EXPORT_SYMBOL(pcibios_bus_to_resource);

#endif



/*

 * PCI Bus Class

 */

include/asm-generic/pci.h

+1 −23
Original line number Diff line number Diff line
@@ -6,29 +6,7 @@ 
#ifndef _ASM_GENERIC_PCI_H

#define _ASM_GENERIC_PCI_H



/**

 * pcibios_resource_to_bus - convert resource to PCI bus address

 * @dev: device which owns this resource

 * @region: converted bus-centric region (start,end)

 * @res: resource to convert

 *

 * Convert a resource to a PCI device bus address or bus window.

 */

static inline void

pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,

			 struct resource *res)

{

	region->start = res->start;

	region->end = res->end;

}



static inline void

pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,

			struct pci_bus_region *region)

{

	res->start = region->start;

	res->end = region->end;

}

#define ARCH_HAS_GENERIC_PCI_OFFSETS



static inline struct resource *

pcibios_select_root(struct pci_dev *pdev, struct resource *res)

include/linux/pci.h

+4 −0
Original line number Diff line number Diff line
@@ -648,6 +648,10 @@ void pci_fixup_cardbus(struct pci_bus *); 


/* Generic PCI functions used internally */



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,

			     struct pci_bus_region *region);

void pcibios_scan_specific_bus(int busn);

extern struct pci_bus *pci_find_bus(int domain, int busnr);

void pci_bus_add_devices(const struct pci_bus *bus);

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