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[PATCH] x86/x86_64: pcibus_to_node

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Define pcibus_to_node to be able to figure out which NUMA node contains a
given PCI device.  This defines pcibus_to_node(bus) in
include/linux/topology.h and adjusts the macros for i386 and x86_64 that
already provided a way to determine the cpumask of a pci device.

x86_64 was changed to not build an array of cpumasks anymore.  Instead an
array of nodes is build which can be used to generate the cpumask via
node_to_cpumask.

Signed-off-by: Christoph Lameter <christoph@lameter.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Christoph Lameter 2005-06-23 00:08:18 -07:00 committed by Linus Torvalds
parent e164f5573b
commit 8c5a09082f
5 changed files with 17 additions and 34 deletions
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4
arch/x86_64/kernel/mpparse.c
View File

@ -23,6 +23,7 @@
#include <linux/kernel_stat.h>
#include <linux/mc146818rtc.h>
#include <linux/acpi.h>
#include <linux/module.h>
#include <asm/smp.h>
#include <asm/mtrr.h>
@ -45,7 +46,8 @@ int acpi_found_madt;
int apic_version [MAX_APICS];
unsigned char mp_bus_id_to_type [MAX_MP_BUSSES] = { [0 ... MAX_MP_BUSSES-1] = -1 };
int mp_bus_id_to_pci_bus [MAX_MP_BUSSES] = { [0 ... MAX_MP_BUSSES-1] = -1 };
cpumask_t pci_bus_to_cpumask [256] = { [0 ... 255] = CPU_MASK_ALL };
unsigned char pci_bus_to_node [256];
EXPORT_SYMBOL(pci_bus_to_node);
static int mp_current_pci_id = 0;
/* I/O APIC entries */

16
arch/x86_64/pci/k8-bus.c
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@ -53,25 +53,11 @@ fill_mp_bus_to_cpumask(void)
for (j = SECONDARY_LDT_BUS_NUMBER(ldtbus);
j <= SUBORDINATE_LDT_BUS_NUMBER(ldtbus);
j++)
pci_bus_to_cpumask[j] =
node_to_cpumask(NODE_ID(nid));
pci_bus_to_node[j] = NODE_ID(nid);
}
}
}
/* quick sanity check */
printed = 0;
for (i = 0; i < 256; i++) {
if (cpus_empty(pci_bus_to_cpumask[i])) {
pci_bus_to_cpumask[i] = CPU_MASK_ALL;
if (printed)
continue;
printk(KERN_ERR
"k8-bus.c: some busses have empty cpu mask\n");
printed = 1;
}
}
return 0;
}

9
include/asm-generic/topology.h
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@ -41,8 +41,15 @@
#ifndef node_to_first_cpu
#define node_to_first_cpu(node) (0)
#endif
#ifndef pcibus_to_node
#define pcibus_to_node(node) (-1)
#endif
#ifndef pcibus_to_cpumask
#define pcibus_to_cpumask(bus) (cpu_online_map)
#define pcibus_to_cpumask(bus) (pcibus_to_node(bus) == -1 ? \
CPU_MASK_ALL : \
node_to_cpumask(pcibus_to_node(bus)) \
)
#endif
#endif /* _ASM_GENERIC_TOPOLOGY_H */

8
include/asm-i386/topology.h
View File

@ -60,12 +60,8 @@ static inline int node_to_first_cpu(int node)
return first_cpu(mask);
}
/* Returns the number of the node containing PCI bus number 'busnr' */
static inline cpumask_t __pcibus_to_cpumask(int busnr)
{
return node_to_cpumask(mp_bus_id_to_node[busnr]);
}
#define pcibus_to_cpumask(bus) __pcibus_to_cpumask(bus->number)
#define pcibus_to_node(bus) mp_bus_id_to_node[(bus)->number]
#define pcibus_to_cpumask(bus) node_to_cpumask(pcibus_to_node(bus))
/* sched_domains SD_NODE_INIT for NUMAQ machines */
#define SD_NODE_INIT (struct sched_domain) { \

14
include/asm-x86_64/topology.h
View File

@ -13,8 +13,8 @@
extern cpumask_t cpu_online_map;
extern unsigned char cpu_to_node[];
extern unsigned char pci_bus_to_node[];
extern cpumask_t node_to_cpumask[];
extern cpumask_t pci_bus_to_cpumask[];
#ifdef CONFIG_ACPI_NUMA
extern int __node_distance(int, int);
@ -26,16 +26,8 @@ extern int __node_distance(int, int);
#define parent_node(node) (node)
#define node_to_first_cpu(node) (__ffs(node_to_cpumask[node]))
#define node_to_cpumask(node) (node_to_cpumask[node])
static inline cpumask_t __pcibus_to_cpumask(int bus)
{
cpumask_t busmask = pci_bus_to_cpumask[bus];
cpumask_t online = cpu_online_map;
cpumask_t res;
cpus_and(res, busmask, online);
return res;
}
#define pcibus_to_cpumask(bus) __pcibus_to_cpumask(bus->number)
#define pcibus_to_node(bus) pci_bus_to_node[(bus)->number]
#define pcibus_to_cpumask(bus) node_to_cpumask(pcibus_to_node(bus));
/* sched_domains SD_NODE_INIT for x86_64 machines */
#define SD_NODE_INIT (struct sched_domain) { \