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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
parent 32a2eea795
commit a79e4198d1
6 changed files with 45 additions and 8 deletions
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5
arch/i386/Kconfig
View File

@ -1137,6 +1137,11 @@ config PCI_MMCONFIG
depends on PCI && ACPI && (PCI_GOMMCONFIG || PCI_GOANY)
default y
config PCI_DOMAINS
bool
depends on PCI
default y
source "drivers/pci/pcie/Kconfig"
source "drivers/pci/Kconfig"

13
arch/x86/pci/acpi.c
View File

@ -189,6 +189,12 @@ struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_device *device, int do
dmi_check_system(acpi_pciprobe_dmi_table);
if (domain && !pci_domains_supported) {
printk(KERN_WARNING "PCI: Multiple domains not supported "
"(dom %d, bus %d)\n", domain, busnum);
return NULL;
}
/* Allocate per-root-bus (not per bus) arch-specific data.
* TODO: leak; this memory is never freed.
* It's arguable whether it's worth the trouble to care.
@ -199,12 +205,7 @@ struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_device *device, int do
return NULL;
}
if (domain != 0) {
printk(KERN_WARNING "PCI: Multiple domains not supported\n");
kfree(sd);
return NULL;
}
sd->domain = domain;
sd->node = -1;
pxm = acpi_get_pxm(device->handle);

6
arch/x86/pci/common.c
View File

@ -29,12 +29,14 @@ struct pci_raw_ops *raw_pci_ops;
static int pci_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *value)
{
return raw_pci_ops->read(0, bus->number, devfn, where, size, value);
return raw_pci_ops->read(pci_domain_nr(bus), bus->number,
devfn, where, size, value);
}
static int pci_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 value)
{
return raw_pci_ops->write(0, bus->number, devfn, where, size, value);
return raw_pci_ops->write(pci_domain_nr(bus), bus->number,
devfn, where, size, value);
}
struct pci_ops pci_root_ops = {

5
arch/x86_64/Kconfig
View File

@ -724,6 +724,11 @@ config PCI_MMCONFIG
bool "Support mmconfig PCI config space access"
depends on PCI && ACPI
config PCI_DOMAINS
bool
depends on PCI
default y
source "drivers/pci/pcie/Kconfig"
source "drivers/pci/Kconfig"

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)
{