[PATCH] acpiphp: add dock event handling
These patches add generic dock event handling to acpiphp. If there are
pci devices that need to be inserted/removed after the dock event, the
event notification will be handed down to the normal pci hotplug event
handler in acpiphp so that new bridges/devices can be enumerated.
Because some dock stations do not have pci bridges or pci devices that
need to be inserted after a dock, acpiphp will remain loaded to handle
dock events even if no hotpluggable pci slots are discovered.
You probably need to have the pci=assign-busses kernel parameter enabled
to use these patches, and you may not allow ibm_acpi to handle docking
notifications and use this patch.
This patch incorporates feedback provided by many.
Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/pci/hotplug/acpiphp.h b/drivers/pci/hotplug/acpiphp.h
index 6a91cfb..885838a 100644
--- a/drivers/pci/hotplug/acpiphp.h
+++ b/drivers/pci/hotplug/acpiphp.h
@@ -161,6 +161,25 @@
struct module *owner;
};
+
+struct dependent_device {
+ struct list_head device_list;
+ struct list_head pci_list;
+ acpi_handle handle;
+ struct acpiphp_func *func;
+};
+
+
+struct acpiphp_dock_station {
+ acpi_handle handle;
+ u32 last_dock_time;
+ u32 flags;
+ struct acpiphp_func *dock_bridge;
+ struct list_head dependent_devices;
+ struct list_head pci_dependent_devices;
+};
+
+
/* PCI bus bridge HID */
#define ACPI_PCI_HOST_HID "PNP0A03"
@@ -198,6 +217,12 @@
#define FUNC_HAS_PS1 (0x00000020)
#define FUNC_HAS_PS2 (0x00000040)
#define FUNC_HAS_PS3 (0x00000080)
+#define FUNC_HAS_DCK (0x00000100)
+#define FUNC_IS_DD (0x00000200)
+
+/* dock station flags */
+#define DOCK_DOCKING (0x00000001)
+#define DOCK_HAS_BRIDGE (0x00000002)
/* function prototypes */
@@ -211,6 +236,7 @@
extern int acpiphp_get_num_slots (void);
extern struct acpiphp_slot *get_slot_from_id (int id);
typedef int (*acpiphp_callback)(struct acpiphp_slot *slot, void *data);
+void handle_hotplug_event_func(acpi_handle, u32, void*);
extern int acpiphp_enable_slot (struct acpiphp_slot *slot);
extern int acpiphp_disable_slot (struct acpiphp_slot *slot);
@@ -220,6 +246,16 @@
extern u8 acpiphp_get_adapter_status (struct acpiphp_slot *slot);
extern u32 acpiphp_get_address (struct acpiphp_slot *slot);
+/* acpiphp_dock.c */
+extern int find_dock_station(void);
+extern void remove_dock_station(void);
+extern void add_dependent_device(struct dependent_device *new_dd);
+extern void add_pci_dependent_device(struct dependent_device *new_dd);
+extern struct dependent_device *get_dependent_device(acpi_handle handle);
+extern int is_dependent_device(acpi_handle handle);
+extern int detect_dependent_devices(acpi_handle *bridge_handle);
+extern struct dependent_device *alloc_dependent_device(acpi_handle handle);
+
/* variables */
extern int acpiphp_debug;