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authorYinghai Lu <Yinghai.Lu@Sun.COM>2008-02-19 03:20:09 -0800
committerIngo Molnar <mingo@elte.hu>2008-04-26 23:41:04 +0200
commit871d5f8dd0f7647f03facd4cb79485938d1b61ab (patch)
treeb08eee02ddd7b4bdb9dfde2637f5154e409cdacc /include/asm-x86
parentbb63b4219976d48ed6d22ac33c18be334fb5a78c (diff)
x86: get mp_bus_to_node early
Currently, on an amd k8 system with multi ht chains, the numa_node of pci devices under /sys/devices/pci0000:80/* is always 0, even if that chain is on node 1 or 2 or 3. Workaround: pcibus_to_node(bus) is used when we want to get the node that pci_device is on. In struct device, we already have numa_node member, and we could use dev_to_node()/set_dev_node() to get and set numa_node in the device. set_dev_node is called in pci_device_add() with pcibus_to_node(bus), and pcibus_to_node uses bus->sysdata for nodeid. The problem is when pci_add_device is called, bus->sysdata is not assigned correct nodeid yet. The result is that numa_node will always be 0. pcibios_scan_root and pci_scan_root could take sysdata. So we need to get mp_bus_to_node mapping before these two are called, and thus get_mp_bus_to_node could get correct node for sysdata in root bus. In scanning of the root bus, all child busses will take parent bus sysdata. So all pci_device->dev.numa_node will be assigned correctly and automatically. Later we could use dev_to_node(&pci_dev->dev) to get numa_node, and we could also could make other bus specific device get the correct numa_node too. This is an updated version of pci_sysdata and Jeff's pci_domain patch. [ mingo@elte.hu: build fix ] Signed-off-by: Yinghai Lu <yinghai.lu@sun.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/asm-x86')
-rw-r--r--include/asm-x86/pci.h2
-rw-r--r--include/asm-x86/topology.h13
2 files changed, 15 insertions, 0 deletions
diff --git a/include/asm-x86/pci.h b/include/asm-x86/pci.h
index ddd8e248fc0..30bbde0cb34 100644
--- a/include/asm-x86/pci.h
+++ b/include/asm-x86/pci.h
@@ -19,6 +19,8 @@ struct pci_sysdata {
};
/* scan a bus after allocating a pci_sysdata for it */
+extern struct pci_bus *pci_scan_bus_on_node(int busno, struct pci_ops *ops,
+ int node);
extern struct pci_bus *pci_scan_bus_with_sysdata(int busno);
static inline int pci_domain_nr(struct pci_bus *bus)
diff --git a/include/asm-x86/topology.h b/include/asm-x86/topology.h
index 22073268b48..4793ae745a7 100644
--- a/include/asm-x86/topology.h
+++ b/include/asm-x86/topology.h
@@ -198,4 +198,17 @@ extern cpumask_t cpu_coregroup_map(int cpu);
#define smt_capable() (smp_num_siblings > 1)
#endif
+#ifdef CONFIG_NUMA
+extern int get_mp_bus_to_node(int busnum);
+extern void set_mp_bus_to_node(int busnum, int node);
+#else
+static inline int get_mp_bus_to_node(int busnum)
+{
+ return 0;
+}
+static inline void set_mp_bus_to_node(int busnum, int node)
+{
+}
+#endif
+
#endif