ACPI: export acpi_pci_root and friends

We can simplify ACPI drivers if we can tell whether a handle is an
ACPI PCI root or not.

Reviewed-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

1 files changed, 16 insertions, 0 deletions

diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index c65e4ce6c3af..c3ace75d57b4 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -369,10 +369,26 @@ int register_acpi_bus_type(struct acpi_bus_type *);
 int unregister_acpi_bus_type(struct acpi_bus_type *);
 struct device *acpi_get_physical_device(acpi_handle);
 
+struct acpi_pci_root {
+        struct list_head node;
+        struct acpi_device * device;
+        struct acpi_pci_id id;
+        struct pci_bus *bus;
+        u16 segment;
+        u8 bus_nr;
+
+        u32 osc_support_set;    /* _OSC state of support bits */
+        u32 osc_control_set;    /* _OSC state of control bits */
+        u32 osc_control_qry;    /* the latest _OSC query result */
+
+        u32 osc_queried:1;      /* has _OSC control been queried? */
+};
+
 /* helper */
 acpi_handle acpi_get_child(acpi_handle, acpi_integer);
 int acpi_is_root_bridge(acpi_handle);
 acpi_handle acpi_get_pci_rootbridge_handle(unsigned int, unsigned int);
+struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle);
 #define DEVICE_ACPI_HANDLE(dev) ((acpi_handle)((dev)->archdata.acpi_handle))
 
 #ifdef CONFIG_PM_SLEEP