From 86ed4bc83abf530cf2019044b74f89a39dfd6425 Mon Sep 17 00:00:00 2001 From: Bob Moore Date: Thu, 3 May 2012 11:08:19 +0800 Subject: ACPICA: Add support for multiple notify handlers This change adds support to allow multiple notify handlers on Device, ThermalZone, and Processor objects. Also re-worked and restructured the entire notify support code for handler installation, handler removal, notify event queuing, and notify dispatch to handler. Extends and updates original commit 3f0be67("ACPI / ACPICA: Multiple system notify handlers per device") by Rafael Wysocki. Signed-off-by: Bob Moore Signed-off-by: Lin Ming Signed-off-by: Len Brown --- drivers/acpi/acpica/evmisc.c | 185 ++++++++++++++++--------------------------- 1 file changed, 67 insertions(+), 118 deletions(-) (limited to 'drivers/acpi/acpica/evmisc.c') diff --git a/drivers/acpi/acpica/evmisc.c b/drivers/acpi/acpica/evmisc.c index 51ef9f5e002d..381fce93a561 100644 --- a/drivers/acpi/acpica/evmisc.c +++ b/drivers/acpi/acpica/evmisc.c @@ -101,102 +101,77 @@ acpi_ev_queue_notify_request(struct acpi_namespace_node * node, u32 notify_value) { union acpi_operand_object *obj_desc; - union acpi_operand_object *handler_obj = NULL; - union acpi_generic_state *notify_info; + union acpi_operand_object *handler_list_head = NULL; + union acpi_generic_state *info; + u8 handler_list_id = 0; acpi_status status = AE_OK; ACPI_FUNCTION_NAME(ev_queue_notify_request); - /* - * For value 0x03 (Ejection Request), may need to run a device method. - * For value 0x02 (Device Wake), if _PRW exists, may need to run - * the _PS0 method. - * For value 0x80 (Status Change) on the power button or sleep button, - * initiate soft-off or sleep operation. - * - * For all cases, simply dispatch the notify to the handler. - */ - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Dispatching Notify on [%4.4s] (%s) Value 0x%2.2X (%s) Node %p\n", - acpi_ut_get_node_name(node), - acpi_ut_get_type_name(node->type), notify_value, - acpi_ut_get_notify_name(notify_value), node)); + /* Are Notifies allowed on this object? */ - /* Get the notify object attached to the NS Node */ - - obj_desc = acpi_ns_get_attached_object(node); - if (obj_desc) { - - /* We have the notify object, Get the correct handler */ - - switch (node->type) { + if (!acpi_ev_is_notify_object(node)) { + return (AE_TYPE); + } - /* Notify is allowed only on these types */ + /* Get the correct notify list type (System or Device) */ - case ACPI_TYPE_DEVICE: - case ACPI_TYPE_THERMAL: - case ACPI_TYPE_PROCESSOR: + if (notify_value <= ACPI_MAX_SYS_NOTIFY) { + handler_list_id = ACPI_SYSTEM_HANDLER_LIST; + } else { + handler_list_id = ACPI_DEVICE_HANDLER_LIST; + } - if (notify_value <= ACPI_MAX_SYS_NOTIFY) { - handler_obj = - obj_desc->common_notify.system_notify; - } else { - handler_obj = - obj_desc->common_notify.device_notify; - } - break; + /* Get the notify object attached to the namespace Node */ - default: + obj_desc = acpi_ns_get_attached_object(node); + if (obj_desc) { - /* All other types are not supported */ + /* We have an attached object, Get the correct handler list */ - return (AE_TYPE); - } + handler_list_head = + obj_desc->common_notify.notify_list[handler_list_id]; } /* - * If there is a handler to run, schedule the dispatcher. - * Check for: - * 1) Global system notify handler - * 2) Global device notify handler - * 3) Per-device notify handler + * If there is no notify handler (Global or Local) + * for this object, just ignore the notify */ - if ((acpi_gbl_system_notify.handler && - (notify_value <= ACPI_MAX_SYS_NOTIFY)) || - (acpi_gbl_device_notify.handler && - (notify_value > ACPI_MAX_SYS_NOTIFY)) || handler_obj) { - notify_info = acpi_ut_create_generic_state(); - if (!notify_info) { - return (AE_NO_MEMORY); - } + if (!acpi_gbl_global_notify[handler_list_id].handler + && !handler_list_head) { + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "No notify handler for Notify, ignoring (%4.4s, %X) node %p\n", + acpi_ut_get_node_name(node), notify_value, + node)); - if (!handler_obj) { - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Executing system notify handler for Notify (%4.4s, %X) " - "node %p\n", - acpi_ut_get_node_name(node), - notify_value, node)); - } + return (AE_OK); + } - notify_info->common.descriptor_type = - ACPI_DESC_TYPE_STATE_NOTIFY; - notify_info->notify.node = node; - notify_info->notify.value = (u16) notify_value; - notify_info->notify.handler_obj = handler_obj; + /* Setup notify info and schedule the notify dispatcher */ - status = - acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_ev_notify_dispatch, - notify_info); - if (ACPI_FAILURE(status)) { - acpi_ut_delete_generic_state(notify_info); - } - } else { - /* There is no notify handler (per-device or system) for this device */ + info = acpi_ut_create_generic_state(); + if (!info) { + return (AE_NO_MEMORY); + } - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "No notify handler for Notify (%4.4s, %X) node %p\n", - acpi_ut_get_node_name(node), notify_value, - node)); + info->common.descriptor_type = ACPI_DESC_TYPE_STATE_NOTIFY; + + info->notify.node = node; + info->notify.value = (u16)notify_value; + info->notify.handler_list_id = handler_list_id; + info->notify.handler_list_head = handler_list_head; + info->notify.global = &acpi_gbl_global_notify[handler_list_id]; + + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Dispatching Notify on [%4.4s] (%s) Value 0x%2.2X (%s) Node %p\n", + acpi_ut_get_node_name(node), + acpi_ut_get_type_name(node->type), notify_value, + acpi_ut_get_notify_name(notify_value), node)); + + status = acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_ev_notify_dispatch, + info); + if (ACPI_FAILURE(status)) { + acpi_ut_delete_generic_state(info); } return (status); @@ -217,60 +192,34 @@ acpi_ev_queue_notify_request(struct acpi_namespace_node * node, static void ACPI_SYSTEM_XFACE acpi_ev_notify_dispatch(void *context) { - union acpi_generic_state *notify_info = - (union acpi_generic_state *)context; - acpi_notify_handler global_handler = NULL; - void *global_context = NULL; + union acpi_generic_state *info = (union acpi_generic_state *)context; union acpi_operand_object *handler_obj; ACPI_FUNCTION_ENTRY(); - /* - * We will invoke a global notify handler if installed. This is done - * _before_ we invoke the per-device handler attached to the device. - */ - if (notify_info->notify.value <= ACPI_MAX_SYS_NOTIFY) { - - /* Global system notification handler */ - - if (acpi_gbl_system_notify.handler) { - global_handler = acpi_gbl_system_notify.handler; - global_context = acpi_gbl_system_notify.context; - } - } else { - /* Global driver notification handler */ - - if (acpi_gbl_device_notify.handler) { - global_handler = acpi_gbl_device_notify.handler; - global_context = acpi_gbl_device_notify.context; - } - } - - /* Invoke the system handler first, if present */ + /* Invoke a global notify handler if installed */ - if (global_handler) { - global_handler(notify_info->notify.node, - notify_info->notify.value, global_context); + if (info->notify.global->handler) { + info->notify.global->handler(info->notify.node, + info->notify.value, + info->notify.global->context); } - /* Now invoke the per-device handler, if present */ + /* Now invoke the local notify handler(s) if any are installed */ - handler_obj = notify_info->notify.handler_obj; - if (handler_obj) { - struct acpi_object_notify_handler *notifier; + handler_obj = info->notify.handler_list_head; + while (handler_obj) { + handler_obj->notify.handler(info->notify.node, + info->notify.value, + handler_obj->notify.context); - notifier = &handler_obj->notify; - while (notifier) { - notifier->handler(notify_info->notify.node, - notify_info->notify.value, - notifier->context); - notifier = notifier->next; - } + handler_obj = + handler_obj->notify.next[info->notify.handler_list_id]; } /* All done with the info object */ - acpi_ut_delete_generic_state(notify_info); + acpi_ut_delete_generic_state(info); } #if (!ACPI_REDUCED_HARDWARE) -- cgit v1.2.1