aboutsummaryrefslogtreecommitdiffstats
path: root/arch/x86/pci/common.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/pci/common.c')
-rw-r--r--arch/x86/pci/common.c128
1 files changed, 16 insertions, 112 deletions
diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c
index 981c2dbd72cc..d491deddebae 100644
--- a/arch/x86/pci/common.c
+++ b/arch/x86/pci/common.c
@@ -456,19 +456,25 @@ void __init dmi_check_pciprobe(void)
456 dmi_check_system(pciprobe_dmi_table); 456 dmi_check_system(pciprobe_dmi_table);
457} 457}
458 458
459struct pci_bus *pcibios_scan_root(int busnum) 459void pcibios_scan_root(int busnum)
460{ 460{
461 struct pci_bus *bus = NULL; 461 struct pci_bus *bus;
462 struct pci_sysdata *sd;
463 LIST_HEAD(resources);
462 464
463 while ((bus = pci_find_next_bus(bus)) != NULL) { 465 sd = kzalloc(sizeof(*sd), GFP_KERNEL);
464 if (bus->number == busnum) { 466 if (!sd) {
465 /* Already scanned */ 467 printk(KERN_ERR "PCI: OOM, skipping PCI bus %02x\n", busnum);
466 return bus; 468 return;
467 } 469 }
470 sd->node = x86_pci_root_bus_node(busnum);
471 x86_pci_root_bus_resources(busnum, &resources);
472 printk(KERN_DEBUG "PCI: Probing PCI hardware (bus %02x)\n", busnum);
473 bus = pci_scan_root_bus(NULL, busnum, &pci_root_ops, sd, &resources);
474 if (!bus) {
475 pci_free_resource_list(&resources);
476 kfree(sd);
468 } 477 }
469
470 return pci_scan_bus_on_node(busnum, &pci_root_ops,
471 get_mp_bus_to_node(busnum));
472} 478}
473 479
474void __init pcibios_set_cache_line_size(void) 480void __init pcibios_set_cache_line_size(void)
@@ -677,105 +683,3 @@ int pci_ext_cfg_avail(void)
677 else 683 else
678 return 0; 684 return 0;
679} 685}
680
681struct pci_bus *pci_scan_bus_on_node(int busno, struct pci_ops *ops, int node)
682{
683 LIST_HEAD(resources);
684 struct pci_bus *bus = NULL;
685 struct pci_sysdata *sd;
686
687 /*
688 * Allocate per-root-bus (not per bus) arch-specific data.
689 * TODO: leak; this memory is never freed.
690 * It's arguable whether it's worth the trouble to care.
691 */
692 sd = kzalloc(sizeof(*sd), GFP_KERNEL);
693 if (!sd) {
694 printk(KERN_ERR "PCI: OOM, skipping PCI bus %02x\n", busno);
695 return NULL;
696 }
697 sd->node = node;
698 x86_pci_root_bus_resources(busno, &resources);
699 printk(KERN_DEBUG "PCI: Probing PCI hardware (bus %02x)\n", busno);
700 bus = pci_scan_root_bus(NULL, busno, ops, sd, &resources);
701 if (!bus) {
702 pci_free_resource_list(&resources);
703 kfree(sd);
704 }
705
706 return bus;
707}
708
709struct pci_bus *pci_scan_bus_with_sysdata(int busno)
710{
711 return pci_scan_bus_on_node(busno, &pci_root_ops, -1);
712}
713
714/*
715 * NUMA info for PCI busses
716 *
717 * Early arch code is responsible for filling in reasonable values here.
718 * A node id of "-1" means "use current node". In other words, if a bus
719 * has a -1 node id, it's not tightly coupled to any particular chunk
720 * of memory (as is the case on some Nehalem systems).
721 */
722#ifdef CONFIG_NUMA
723
724#define BUS_NR 256
725
726#ifdef CONFIG_X86_64
727
728static int mp_bus_to_node[BUS_NR] = {
729 [0 ... BUS_NR - 1] = -1
730};
731
732void set_mp_bus_to_node(int busnum, int node)
733{
734 if (busnum >= 0 && busnum < BUS_NR)
735 mp_bus_to_node[busnum] = node;
736}
737
738int get_mp_bus_to_node(int busnum)
739{
740 int node = -1;
741
742 if (busnum < 0 || busnum > (BUS_NR - 1))
743 return node;
744
745 node = mp_bus_to_node[busnum];
746
747 /*
748 * let numa_node_id to decide it later in dma_alloc_pages
749 * if there is no ram on that node
750 */
751 if (node != -1 && !node_online(node))
752 node = -1;
753
754 return node;
755}
756
757#else /* CONFIG_X86_32 */
758
759static int mp_bus_to_node[BUS_NR] = {
760 [0 ... BUS_NR - 1] = -1
761};
762
763void set_mp_bus_to_node(int busnum, int node)
764{
765 if (busnum >= 0 && busnum < BUS_NR)
766 mp_bus_to_node[busnum] = (unsigned char) node;
767}
768
769int get_mp_bus_to_node(int busnum)
770{
771 int node;
772
773 if (busnum < 0 || busnum > (BUS_NR - 1))
774 return 0;
775 node = mp_bus_to_node[busnum];
776 return node;
777}
778
779#endif /* CONFIG_X86_32 */
780
781#endif /* CONFIG_NUMA */