arch/i386/pci/acpi.c

   1 #include <linux/pci.h>
   2 #include <linux/acpi.h>
   3 #include <linux/init.h>
   4 #include <linux/irq.h>
   5 #include <asm/numa.h>
   6 #include "pci.h"
   7
   8 struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_device *device, int domain, int busnum)
   9 {
  10         struct pci_bus *bus;
  11
  12         if (domain != 0) {
  13                 printk(KERN_WARNING "PCI: Multiple domains not supported\n");
  14                 return NULL;
  15         }
  16
  17         bus = pcibios_scan_root(busnum);
  18 #ifdef CONFIG_ACPI_NUMA
  19         if (bus != NULL) {
  20                 int pxm = acpi_get_pxm(device->handle);
  21                 if (pxm >= 0) {
  22                         bus->sysdata = (void *)(unsigned long)pxm_to_node(pxm);
  23                         printk("bus %d -> pxm %d -> node %ld\n",
  24                                 busnum, pxm, (long)(bus->sysdata));
  25                 }
  26         }
  27 #endif
  28
  29         return bus;
  30 }
  31
  32 extern int pci_routeirq;
  33 static int __init pci_acpi_init(void)
  34 {
  35         struct pci_dev *dev = NULL;
  36
  37         if (pcibios_scanned)
  38                 return 0;
  39
  40         if (acpi_noirq)
  41                 return 0;
  42
  43         printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n");
  44         acpi_irq_penalty_init();
  45         pcibios_scanned++;
  46         pcibios_enable_irq = acpi_pci_irq_enable;
  47         pcibios_disable_irq = acpi_pci_irq_disable;
  48
  49         if (pci_routeirq) {
  50                 /*
  51                  * PCI IRQ routing is set up by pci_enable_device(), but we
  52                  * also do it here in case there are still broken drivers that
  53                  * don't use pci_enable_device().
  54                  */
  55                 printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n");
  56                 for_each_pci_dev(dev)
  57                         acpi_pci_irq_enable(dev);
  58         } else
  59                 printk(KERN_INFO "PCI: If a device doesn't work, try \"pci=routeirq\".  If it helps, post a report\n");
  60
  61 #ifdef CONFIG_X86_IO_APIC
  62         if (acpi_ioapic)
  63                 print_IO_APIC();
  64 #endif
  65
  66         return 0;
  67 }
  68 subsys_initcall(pci_acpi_init);