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PCI: X86: Introduce and enable PCI domain support

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* fix bug in pci_read() and pci_write() which prevented PCI domain
  support from working (hardcoded domain 0).

* unconditionally enable CONFIG_PCI_DOMAINS

* implement pci_domain_nr() and pci_proc_domain(), as required of
  all arches when CONFIG_PCI_DOMAINS is enabled.

* store domain in struct pci_sysdata, as assigned by ACPI

* support "pci=nodomains"

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Jeff Garzik 2007-10-11 16:58:30 -04:00 • committed by Greg Kroah-Hartman
commit a79e4198d1
6 changed files with 45 additions and 8 deletions
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12
include/asm-x86/pci_32.h
View file

@ -5,12 +5,24 @@
#ifdef __KERNEL__
struct pci_sysdata {
int domain; /* PCI domain */
int node; /* NUMA node */
};
/* scan a bus after allocating a pci_sysdata for it */
extern struct pci_bus *pci_scan_bus_with_sysdata(int busno);
static inline int pci_domain_nr(struct pci_bus *bus)
{
struct pci_sysdata *sd = bus->sysdata;
return sd->domain;
}
static inline int pci_proc_domain(struct pci_bus *bus)
{
return pci_domain_nr(bus);
}
#include <linux/mm.h> /* for struct page */
/* Can be used to override the logic in pci_scan_bus for skipping

12
include/asm-x86/pci_64.h
View file

@ -6,12 +6,24 @@
#ifdef __KERNEL__
struct pci_sysdata {
int domain; /* PCI domain */
int node; /* NUMA node */
void* iommu; /* IOMMU private data */
};
extern struct pci_bus *pci_scan_bus_with_sysdata(int busno);
static inline int pci_domain_nr(struct pci_bus *bus)
{
struct pci_sysdata *sd = bus->sysdata;
return sd->domain;
}
static inline int pci_proc_domain(struct pci_bus *bus)
{
return pci_domain_nr(bus);
}
#ifdef CONFIG_CALGARY_IOMMU
static inline void* pci_iommu(struct pci_bus *bus)
{