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[IA64] pcibus_to_node implementation for IA64

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pcibus_to_node provides a way for the Linux kernel to identify to which
node a certain pcibus connects to. Allocations of control structures
for devices can then be made on the node where the pci bus is located
to allow local access during interrupt and other device manipulation.

This patch provides a new "node" field in the the pci_controller
structure. The node field will be set based on ACPI information (thanks
to Alex Williamson  <alex.williamson@hp.com for that piece).

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Christoph Lameter 2005-07-07 16:59:00 -07:00 committed by Tony Luck
parent 1604d9c8f8
commit 514604c6d1
3 changed files with 16 additions and 2 deletions
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12
arch/ia64/pci/pci.c
View file

@ -157,6 +157,7 @@ alloc_pci_controller (int seg)
memset(controller, 0, sizeof(*controller));
controller->segment = seg;
controller->node = -1;
return controller;
}
@ -288,6 +289,7 @@ pci_acpi_scan_root(struct acpi_device *device, int domain, int bus)
unsigned int windows = 0;
struct pci_bus *pbus;
char *name;
int pxm;
controller = alloc_pci_controller(domain);
if (!controller)
@ -295,10 +297,16 @@ pci_acpi_scan_root(struct acpi_device *device, int domain, int bus)
controller->acpi_handle = device->handle;
pxm = acpi_get_pxm(controller->acpi_handle);
#ifdef CONFIG_NUMA
if (pxm >= 0)
controller->node = pxm_to_nid_map[pxm];
#endif
acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_window,
&windows);
controller->window = kmalloc(sizeof(*controller->window) * windows,
GFP_KERNEL);
controller->window = kmalloc_node(sizeof(*controller->window) * windows,
GFP_KERNEL, controller->node);
if (!controller->window)
goto out2;

1
include/asm-ia64/pci.h
View file

@ -128,6 +128,7 @@ struct pci_controller {
void *acpi_handle;
void *iommu;
int segment;
int node; /* nearest node with memory or -1 for global allocation */
unsigned int windows;
struct pci_window *window;

5
include/asm-ia64/topology.h
View file

@ -40,6 +40,11 @@
*/
#define node_to_first_cpu(node) (__ffs(node_to_cpumask(node)))
/*
* Determines the node for a given pci bus
*/
#define pcibus_to_node(bus) PCI_CONTROLLER(bus)->node
void build_cpu_to_node_map(void);
#define SD_CPU_INIT (struct sched_domain) { \