mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-26 18:50:53 +07:00
085ae41f66
There were three changes necessary in order to allow
sparc64 to use setup-res.c:
1) Sparc64 roots the PCI I/O and MEM address space using
parent resources contained in the PCI controller structure.
I'm actually surprised no other platforms do this, especially
ones like Alpha and PPC{,64}. These resources get linked into the
iomem/ioport tree when PCI controllers are probed.
So the hierarchy looks like this:
iomem --|
PCI controller 1 MEM space --|
device 1
device 2
etc.
PCI controller 2 MEM space --|
...
ioport --|
PCI controller 1 IO space --|
...
PCI controller 2 IO space --|
...
You get the idea. The drivers/pci/setup-res.c code allocates
using plain iomem_space and ioport_space as the root, so that
wouldn't work with the above setup.
So I added a pcibios_select_root() that is used to handle this.
It uses the PCI controller struct's io_space and mem_space on
sparc64, and io{port,mem}_resource on every other platform to
keep current behavior.
2) quirk_io_region() is buggy. It takes in raw BUS view addresses
and tries to use them as a PCI resource.
pci_claim_resource() expects the resource to be fully formed when
it gets called. The sparc64 implementation would do the translation
but that's absolutely wrong, because if the same resource gets
released then re-claimed we'll adjust things twice.
So I fixed up quirk_io_region() to do the proper pcibios_bus_to_resource()
conversion before passing it on to pci_claim_resource().
3) I was mistakedly __init'ing the function methods the PCI controller
drivers provide on sparc64 to implement some parts of these
routines. This was, of course, easy to fix.
So we end up with the following, and that nasty SPARC64 makefile
ifdef in drivers/pci/Makefile is finally zapped.
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
56 lines
1.2 KiB
C
56 lines
1.2 KiB
C
/*
|
|
* linux/include/asm-generic/pci.h
|
|
*
|
|
* Copyright (C) 2003 Russell King
|
|
*/
|
|
#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;
|
|
}
|
|
|
|
static inline struct resource *
|
|
pcibios_select_root(struct pci_dev *pdev, struct resource *res)
|
|
{
|
|
struct resource *root = NULL;
|
|
|
|
if (res->flags & IORESOURCE_IO)
|
|
root = &ioport_resource;
|
|
if (res->flags & IORESOURCE_MEM)
|
|
root = &iomem_resource;
|
|
|
|
return root;
|
|
}
|
|
|
|
#define pcibios_scan_all_fns(a, b) 0
|
|
|
|
#ifndef HAVE_ARCH_PCI_GET_LEGACY_IDE_IRQ
|
|
static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
|
|
{
|
|
return channel ? 15 : 14;
|
|
}
|
|
#endif /* HAVE_ARCH_PCI_GET_LEGACY_IDE_IRQ */
|
|
|
|
#endif
|