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Diffstat (limited to 'arch/x86/pci/acpi.c')
-rw-r--r--arch/x86/pci/acpi.c90
1 files changed, 90 insertions, 0 deletions
diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
new file mode 100644
index 00000000000..bc8a44bddaa
--- /dev/null
+++ b/arch/x86/pci/acpi.c
@@ -0,0 +1,90 @@
+#include <linux/pci.h>
+#include <linux/acpi.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <asm/numa.h>
+#include "pci.h"
+
+struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_device *device, int domain, int busnum)
+{
+ struct pci_bus *bus;
+ struct pci_sysdata *sd;
+ int pxm;
+
+ /* Allocate per-root-bus (not per bus) arch-specific data.
+ * TODO: leak; this memory is never freed.
+ * It's arguable whether it's worth the trouble to care.
+ */
+ sd = kzalloc(sizeof(*sd), GFP_KERNEL);
+ if (!sd) {
+ printk(KERN_ERR "PCI: OOM, not probing PCI bus %02x\n", busnum);
+ return NULL;
+ }
+
+ if (domain != 0) {
+ printk(KERN_WARNING "PCI: Multiple domains not supported\n");
+ kfree(sd);
+ return NULL;
+ }
+
+ sd->node = -1;
+
+ pxm = acpi_get_pxm(device->handle);
+#ifdef CONFIG_ACPI_NUMA
+ if (pxm >= 0)
+ sd->node = pxm_to_node(pxm);
+#endif
+
+ bus = pci_scan_bus_parented(NULL, busnum, &pci_root_ops, sd);
+ if (!bus)
+ kfree(sd);
+
+#ifdef CONFIG_ACPI_NUMA
+ if (bus != NULL) {
+ if (pxm >= 0) {
+ printk("bus %d -> pxm %d -> node %d\n",
+ busnum, pxm, sd->node);
+ }
+ }
+#endif
+
+ return bus;
+}
+
+extern int pci_routeirq;
+static int __init pci_acpi_init(void)
+{
+ struct pci_dev *dev = NULL;
+
+ if (pcibios_scanned)
+ return 0;
+
+ if (acpi_noirq)
+ return 0;
+
+ printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n");
+ acpi_irq_penalty_init();
+ pcibios_scanned++;
+ pcibios_enable_irq = acpi_pci_irq_enable;
+ pcibios_disable_irq = acpi_pci_irq_disable;
+
+ if (pci_routeirq) {
+ /*
+ * PCI IRQ routing is set up by pci_enable_device(), but we
+ * also do it here in case there are still broken drivers that
+ * don't use pci_enable_device().
+ */
+ printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n");
+ for_each_pci_dev(dev)
+ acpi_pci_irq_enable(dev);
+ } else
+ printk(KERN_INFO "PCI: If a device doesn't work, try \"pci=routeirq\". If it helps, post a report\n");
+
+#ifdef CONFIG_X86_IO_APIC
+ if (acpi_ioapic)
+ print_IO_APIC();
+#endif
+
+ return 0;
+}
+subsys_initcall(pci_acpi_init);