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[POWERPC] pcibus_to_node fixes

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of_node_to_nid returns -1 if the associativity cannot be found. This
means pcibus_to_cpumask has to be careful not to pass a negative index into
node_to_cpumask.

Since pcibus_to_node could be used a lot, and of_node_to_nid is slow (it
walks a list doing strcmps), lets also cache the node in the
pci_controller struct.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Anton Blanchard 2006-06-10 20:53:06 +10:00 committed by Paul Mackerras
parent f2b09c8189
commit 357518fa34
3 changed files with 27 additions and 8 deletions
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13
arch/powerpc/kernel/pci_64.c
View File

@ -227,8 +227,10 @@ struct pci_controller * pcibios_alloc_controller(struct device_node *dev)
pci_setup_pci_controller(phb);
phb->arch_data = dev;
phb->is_dynamic = mem_init_done;
if (dev)
if (dev) {
PHB_SET_NODE(phb, of_node_to_nid(dev));
add_linux_pci_domain(dev, phb);
}
return phb;
}
@ -1415,3 +1417,12 @@ long sys_pciconfig_iobase(long which, unsigned long in_bus,
return -EOPNOTSUPP;
}
#ifdef CONFIG_NUMA
int pcibus_to_node(struct pci_bus *bus)
{
struct pci_controller *phb = pci_bus_to_host(bus);
return phb->node;
}
EXPORT_SYMBOL(pcibus_to_node);
#endif

8
include/asm-powerpc/pci-bridge.h
View File

@ -6,6 +6,7 @@
#include <asm-ppc/pci-bridge.h>
#else
#include <linux/config.h>
#include <linux/pci.h>
#include <linux/list.h>
@ -22,6 +23,7 @@
struct pci_controller {
struct pci_bus *bus;
char is_dynamic;
int node;
void *arch_data;
struct list_head list_node;
@ -165,6 +167,12 @@ static inline unsigned long pci_address_to_pio(phys_addr_t address)
#define PCI_PROBE_NORMAL 0 /* Do normal PCI probing */
#define PCI_PROBE_DEVTREE 1 /* Instantiate from device tree */
#ifdef CONFIG_NUMA
#define PHB_SET_NODE(PHB, NODE) ((PHB)->node = (NODE))
#else
#define PHB_SET_NODE(PHB, NODE) ((PHB)->node = -1)
#endif
#endif /* CONFIG_PPC64 */
#endif /* __KERNEL__ */
#endif

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

@ -32,13 +32,13 @@ static inline int node_to_first_cpu(int node)
int of_node_to_nid(struct device_node *device);
#ifdef CONFIG_PPC64
#define pcibus_to_node(bus) (of_node_to_nid(bus->sysdata))
#define pcibus_to_cpumask(bus) (node_to_cpumask(of_node_to_nid(bus->sysdata)))
#else
#define pcibus_to_node(node) (-1)
#define pcibus_to_cpumask(bus) (cpu_online_map)
#endif
struct pci_bus;
extern int pcibus_to_node(struct pci_bus *bus);
#define pcibus_to_cpumask(bus) (pcibus_to_node(bus) == -1 ? \
CPU_MASK_ALL : \
node_to_cpumask(pcibus_to_node(bus)) \
)
/* sched_domains SD_NODE_INIT for PPC64 machines */
#define SD_NODE_INIT (struct sched_domain) { \