acpi_status
acpi_ev_attach_region (
union acpi_operand_object *handler_obj,
union acpi_operand_object *region_obj,
u8 acpi_ns_is_locked)
{
acpi_status status;
acpi_status status2;
ACPI_FUNCTION_TRACE ("ev_attach_region");
ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
"Adding Region %p to address handler %p [%s]\n",
region_obj, handler_obj, acpi_ut_get_region_name (region_obj->region.space_id)));
/* Link this region to the front of the handler's list */
region_obj->region.next = handler_obj->address_space.region_list;
handler_obj->address_space.region_list = region_obj;
/* Install the region's handler */
if (region_obj->region.address_space) {
return_ACPI_STATUS (AE_ALREADY_EXISTS);
}
region_obj->region.address_space = handler_obj;
acpi_ut_add_reference (handler_obj);
/*
* Tell all users that this region is usable by running the _REG
* method
*/
if (acpi_ns_is_locked) {
status2 = acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (status2)) {
return_ACPI_STATUS (status2);
}
}
status = acpi_ev_execute_reg_method (region_obj, 1);
if (acpi_ns_is_locked) {
status2 = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (status2)) {
return_ACPI_STATUS (status2);
}
}
return_ACPI_STATUS (status);
}
static acpi_status
acpi_ev_reg_run(acpi_handle obj_handle,
u32 level, void *context, void **return_value)
{
union acpi_operand_object *obj_desc;
struct acpi_namespace_node *node;
acpi_status status;
struct acpi_reg_walk_info *info;
info = ACPI_CAST_PTR(struct acpi_reg_walk_info, context);
/* Convert and validate the device handle */
node = acpi_ns_validate_handle(obj_handle);
if (!node) {
return (AE_BAD_PARAMETER);
}
/*
* We only care about regions.and objects that are allowed to have address
* space handlers
*/
if ((node->type != ACPI_TYPE_REGION) && (node != acpi_gbl_root_node)) {
return (AE_OK);
}
/* Check for an existing internal object */
obj_desc = acpi_ns_get_attached_object(node);
if (!obj_desc) {
/* No object, just exit */
return (AE_OK);
}
/* Object is a Region */
if (obj_desc->region.space_id != info->space_id) {
/* This region is for a different address space, just ignore it */
return (AE_OK);
}
info->reg_run_count++;
status = acpi_ev_execute_reg_method(obj_desc, ACPI_REG_CONNECT);
return (status);
}
ACPI_STATUS
acpi_ev_associate_region_and_handler (
ACPI_OPERAND_OBJECT *handler_obj,
ACPI_OPERAND_OBJECT *region_obj,
u8 acpi_ns_is_locked)
{
ACPI_STATUS status;
ACPI_ASSERT (region_obj->region.space_id == handler_obj->addr_handler.space_id);
ACPI_ASSERT (region_obj->region.addr_handler == 0);
/*
* Link this region to the front of the handler's list
*/
region_obj->region.next = handler_obj->addr_handler.region_list;
handler_obj->addr_handler.region_list = region_obj;
/*
* set the region's handler
*/
/*
Handler_obj->Common.Reference_count =
(u16) (Handler_obj->Common.Reference_count +
Region_obj->Common.Reference_count - 1);
*/
region_obj->region.addr_handler = handler_obj;
/*
* Last thing, tell all users that this region is usable
*/
if (acpi_ns_is_locked) {
acpi_cm_release_mutex (ACPI_MTX_NAMESPACE);
}
status = acpi_ev_execute_reg_method (region_obj, 1);
if (acpi_ns_is_locked) {
acpi_cm_acquire_mutex (ACPI_MTX_NAMESPACE);
}
return (status);
}
void
acpi_ev_detach_region(union acpi_operand_object *region_obj,
u8 acpi_ns_is_locked)
{
union acpi_operand_object *handler_obj;
union acpi_operand_object *obj_desc;
union acpi_operand_object *start_desc;
union acpi_operand_object **last_obj_ptr;
acpi_adr_space_setup region_setup;
void **region_context;
union acpi_operand_object *region_obj2;
acpi_status status;
ACPI_FUNCTION_TRACE(ev_detach_region);
region_obj2 = acpi_ns_get_secondary_object(region_obj);
if (!region_obj2) {
return_VOID;
}
region_context = ®ion_obj2->extra.region_context;
/* Get the address handler from the region object */
handler_obj = region_obj->region.handler;
if (!handler_obj) {
/* This region has no handler, all done */
return_VOID;
}
/* Find this region in the handler's list */
obj_desc = handler_obj->address_space.region_list;
start_desc = obj_desc;
last_obj_ptr = &handler_obj->address_space.region_list;
while (obj_desc) {
/* Is this the correct Region? */
if (obj_desc == region_obj) {
ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
"Removing Region %p from address handler %p\n",
region_obj, handler_obj));
/* This is it, remove it from the handler's list */
*last_obj_ptr = obj_desc->region.next;
obj_desc->region.next = NULL; /* Must clear field */
if (acpi_ns_is_locked) {
status =
acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE(status)) {
return_VOID;
}
}
/* Now stop region accesses by executing the _REG method */
status =
acpi_ev_execute_reg_method(region_obj,
ACPI_REG_DISCONNECT);
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status,
"from region _REG, [%s]",
acpi_ut_get_region_name
(region_obj->region.space_id)));
}
if (acpi_ns_is_locked) {
status =
acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE(status)) {
return_VOID;
}
}
/*
* If the region has been activated, call the setup handler with
* the deactivate notification
*/
if (region_obj->region.flags & AOPOBJ_SETUP_COMPLETE) {
region_setup = handler_obj->address_space.setup;
status =
region_setup(region_obj,
ACPI_REGION_DEACTIVATE,
handler_obj->address_space.
context, region_context);
/*
* region_context should have been released by the deactivate
* operation. We don't need access to it anymore here.
*/
if (region_context) {
*region_context = NULL;
}
/* Init routine may fail, Just ignore errors */
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status,
"from region handler - deactivate, [%s]",
acpi_ut_get_region_name
(region_obj->region.
space_id)));
}
region_obj->region.flags &=
~(AOPOBJ_SETUP_COMPLETE);
}
/*
* Remove handler reference in the region
*
* NOTE: this doesn't mean that the region goes away, the region
* is just inaccessible as indicated to the _REG method
*
* If the region is on the handler's list, this must be the
* region's handler
*/
region_obj->region.handler = NULL;
acpi_ut_remove_reference(handler_obj);
return_VOID;
}
/* Walk the linked list of handlers */
last_obj_ptr = &obj_desc->region.next;
obj_desc = obj_desc->region.next;
/* Prevent infinite loop if list is corrupted */
if (obj_desc == start_desc) {
ACPI_ERROR((AE_INFO,
"Circular handler list in region object %p",
region_obj));
return_VOID;
}
}
/* If we get here, the region was not in the handler's region list */
ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
"Cannot remove region %p from address handler %p\n",
region_obj, handler_obj));
return_VOID;
}
acpi_status
acpi_ev_initialize_region(union acpi_operand_object *region_obj,
u8 acpi_ns_locked)
{
union acpi_operand_object *handler_obj;
union acpi_operand_object *obj_desc;
acpi_adr_space_type space_id;
struct acpi_namespace_node *node;
acpi_status status;
struct acpi_namespace_node *method_node;
acpi_name *reg_name_ptr = (acpi_name *) METHOD_NAME__REG;
union acpi_operand_object *region_obj2;
ACPI_FUNCTION_TRACE_U32(ev_initialize_region, acpi_ns_locked);
if (!region_obj) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
if (region_obj->common.flags & AOPOBJ_OBJECT_INITIALIZED) {
return_ACPI_STATUS(AE_OK);
}
region_obj2 = acpi_ns_get_secondary_object(region_obj);
if (!region_obj2) {
return_ACPI_STATUS(AE_NOT_EXIST);
}
node = acpi_ns_get_parent_node(region_obj->region.node);
space_id = region_obj->region.space_id;
/* Setup defaults */
region_obj->region.handler = NULL;
region_obj2->extra.method_REG = NULL;
region_obj->common.flags &= ~(AOPOBJ_SETUP_COMPLETE);
region_obj->common.flags |= AOPOBJ_OBJECT_INITIALIZED;
/* Find any "_REG" method associated with this region definition */
status =
acpi_ns_search_one_scope(*reg_name_ptr, node, ACPI_TYPE_METHOD,
&method_node);
if (ACPI_SUCCESS(status)) {
/*
* The _REG method is optional and there can be only one per region
* definition. This will be executed when the handler is attached
* or removed
*/
region_obj2->extra.method_REG = method_node;
}
/*
* The following loop depends upon the root Node having no parent
* ie: acpi_gbl_root_node->parent_entry being set to NULL
*/
while (node) {
/* Check to see if a handler exists */
handler_obj = NULL;
obj_desc = acpi_ns_get_attached_object(node);
if (obj_desc) {
/* Can only be a handler if the object exists */
switch (node->type) {
case ACPI_TYPE_DEVICE:
handler_obj = obj_desc->device.handler;
break;
case ACPI_TYPE_PROCESSOR:
handler_obj = obj_desc->processor.handler;
break;
case ACPI_TYPE_THERMAL:
handler_obj = obj_desc->thermal_zone.handler;
break;
default:
/* Ignore other objects */
break;
}
while (handler_obj) {
/* Is this handler of the correct type? */
if (handler_obj->address_space.space_id ==
space_id) {
/* Found correct handler */
ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
"Found handler %p for region %p in obj %p\n",
handler_obj,
region_obj,
obj_desc));
status =
acpi_ev_attach_region(handler_obj,
region_obj,
acpi_ns_locked);
/*
* Tell all users that this region is usable by running the _REG
* method
*/
if (acpi_ns_locked) {
status =
acpi_ut_release_mutex
(ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS
(status);
}
}
status =
acpi_ev_execute_reg_method
(region_obj, 1);
if (acpi_ns_locked) {
status =
acpi_ut_acquire_mutex
(ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS
(status);
}
}
return_ACPI_STATUS(AE_OK);
}
/* Try next handler in the list */
handler_obj = handler_obj->address_space.next;
}
}
/*
* This node does not have the handler we need;
* Pop up one level
*/
node = acpi_ns_get_parent_node(node);
}
/* If we get here, there is no handler for this region */
ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
"No handler for RegionType %s(%X) (RegionObj %p)\n",
acpi_ut_get_region_name(space_id), space_id,
region_obj));
return_ACPI_STATUS(AE_NOT_EXIST);
}
acpi_status
acpi_ev_initialize_region(union acpi_operand_object *region_obj,
u8 acpi_ns_locked)
{
union acpi_operand_object *handler_obj;
union acpi_operand_object *obj_desc;
acpi_adr_space_type space_id;
struct acpi_namespace_node *node;
acpi_status status;
ACPI_FUNCTION_TRACE_U32(ev_initialize_region, acpi_ns_locked);
if (!region_obj) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
if (region_obj->common.flags & AOPOBJ_OBJECT_INITIALIZED) {
return_ACPI_STATUS(AE_OK);
}
acpi_ev_associate_reg_method(region_obj);
region_obj->common.flags |= AOPOBJ_OBJECT_INITIALIZED;
node = region_obj->region.node->parent;
space_id = region_obj->region.space_id;
/*
* The following loop depends upon the root Node having no parent
* ie: acpi_gbl_root_node->Parent being set to NULL
*/
while (node) {
/* Check to see if a handler exists */
handler_obj = NULL;
obj_desc = acpi_ns_get_attached_object(node);
if (obj_desc) {
/* Can only be a handler if the object exists */
switch (node->type) {
case ACPI_TYPE_DEVICE:
case ACPI_TYPE_PROCESSOR:
case ACPI_TYPE_THERMAL:
handler_obj = obj_desc->common_notify.handler;
break;
case ACPI_TYPE_METHOD:
/*
* If we are executing module level code, the original
* Node's object was replaced by this Method object and we
* saved the handler in the method object.
*
* See acpi_ns_exec_module_code
*/
if (obj_desc->method.
info_flags & ACPI_METHOD_MODULE_LEVEL) {
handler_obj =
obj_desc->method.dispatch.handler;
}
break;
default:
/* Ignore other objects */
break;
}
handler_obj =
acpi_ev_find_region_handler(space_id, handler_obj);
if (handler_obj) {
/* Found correct handler */
ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
"Found handler %p for region %p in obj %p\n",
handler_obj, region_obj,
obj_desc));
status =
acpi_ev_attach_region(handler_obj,
region_obj,
acpi_ns_locked);
/*
* Tell all users that this region is usable by
* running the _REG method
*/
if (acpi_ns_locked) {
status =
acpi_ut_release_mutex
(ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
}
status =
acpi_ev_execute_reg_method(region_obj,
ACPI_REG_CONNECT);
if (acpi_ns_locked) {
status =
acpi_ut_acquire_mutex
(ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
}
return_ACPI_STATUS(AE_OK);
}
}
/* This node does not have the handler we need; Pop up one level */
node = node->parent;
}
/* If we get here, there is no handler for this region */
ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
"No handler for RegionType %s(%X) (RegionObj %p)\n",
acpi_ut_get_region_name(space_id), space_id,
region_obj));
return_ACPI_STATUS(AE_NOT_EXIST);
}
void
acpi_ev_detach_region(
union acpi_operand_object *region_obj,
u8 acpi_ns_is_locked)
{
union acpi_operand_object *handler_obj;
union acpi_operand_object *obj_desc;
union acpi_operand_object **last_obj_ptr;
acpi_adr_space_setup region_setup;
void **region_context;
union acpi_operand_object *region_obj2;
acpi_status status;
ACPI_FUNCTION_TRACE ("ev_detach_region");
region_obj2 = acpi_ns_get_secondary_object (region_obj);
if (!region_obj2) {
return_VOID;
}
region_context = ®ion_obj2->extra.region_context;
/* Get the address handler from the region object */
handler_obj = region_obj->region.address_space;
if (!handler_obj) {
/* This region has no handler, all done */
return_VOID;
}
/* Find this region in the handler's list */
obj_desc = handler_obj->address_space.region_list;
last_obj_ptr = &handler_obj->address_space.region_list;
while (obj_desc) {
/* Is this the correct Region? */
if (obj_desc == region_obj) {
ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
"Removing Region %p from address handler %p\n",
region_obj, handler_obj));
/* This is it, remove it from the handler's list */
*last_obj_ptr = obj_desc->region.next;
obj_desc->region.next = NULL; /* Must clear field */
if (acpi_ns_is_locked) {
status = acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (status)) {
return_VOID;
}
}
/* Now stop region accesses by executing the _REG method */
status = acpi_ev_execute_reg_method (region_obj, 0);
if (ACPI_FAILURE (status)) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "%s from region _REG, [%s]\n",
acpi_format_exception (status),
acpi_ut_get_region_name (region_obj->region.space_id)));
}
if (acpi_ns_is_locked) {
status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (status)) {
return_VOID;
}
}
/* Call the setup handler with the deactivate notification */
region_setup = handler_obj->address_space.setup;
status = region_setup (region_obj, ACPI_REGION_DEACTIVATE,
handler_obj->address_space.context, region_context);
/* Init routine may fail, Just ignore errors */
if (ACPI_FAILURE (status)) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "%s from region init, [%s]\n",
acpi_format_exception (status),
acpi_ut_get_region_name (region_obj->region.space_id)));
}
region_obj->region.flags &= ~(AOPOBJ_SETUP_COMPLETE);
/*
* Remove handler reference in the region
*
* NOTE: this doesn't mean that the region goes away
* The region is just inaccessible as indicated to
* the _REG method
*
* If the region is on the handler's list
* this better be the region's handler
*/
region_obj->region.address_space = NULL;
acpi_ut_remove_reference (handler_obj);
return_VOID;
}
/* Walk the linked list of handlers */
last_obj_ptr = &obj_desc->region.next;
obj_desc = obj_desc->region.next;
}
/* If we get here, the region was not in the handler's region list */
ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
"Cannot remove region %p from address handler %p\n",
region_obj, handler_obj));
return_VOID;
}
void
acpi_ev_disassociate_region_from_handler(
ACPI_OPERAND_OBJECT *region_obj,
u8 acpi_ns_is_locked)
{
ACPI_OPERAND_OBJECT *handler_obj;
ACPI_OPERAND_OBJECT *obj_desc;
ACPI_OPERAND_OBJECT **last_obj_ptr;
ADDRESS_SPACE_SETUP region_setup;
void *region_context;
ACPI_STATUS status;
region_context = region_obj->region.extra->extra.region_context;
/*
* Get the address handler from the region object
*/
handler_obj = region_obj->region.addr_handler;
if (!handler_obj) {
/*
* This region has no handler, all done
*/
return;
}
/*
* Find this region in the handler's list
*/
obj_desc = handler_obj->addr_handler.region_list;
last_obj_ptr = &handler_obj->addr_handler.region_list;
while (obj_desc) {
/*
* See if this is the one
*/
if (obj_desc == region_obj) {
/*
* This is it, remove it from the handler's list
*/
*last_obj_ptr = obj_desc->region.next;
obj_desc->region.next = NULL; /* Must clear field */
if (acpi_ns_is_locked) {
acpi_cm_release_mutex (ACPI_MTX_NAMESPACE);
}
/*
* Now stop region accesses by executing the _REG method
*/
acpi_ev_execute_reg_method (region_obj, 0);
if (acpi_ns_is_locked) {
acpi_cm_acquire_mutex (ACPI_MTX_NAMESPACE);
}
/*
* Call the setup handler with the deactivate notification
*/
region_setup = handler_obj->addr_handler.setup;
status = region_setup (region_obj, ACPI_REGION_DEACTIVATE,
handler_obj->addr_handler.context,
®ion_context);
/*
* Init routine may fail, Just ignore errors
*/
region_obj->region.flags &= ~(AOPOBJ_INITIALIZED);
/*
* Remove handler reference in the region
*
* NOTE: this doesn't mean that the region goes away
* The region is just inaccessible as indicated to
* the _REG method
*
* If the region is on the handler's list
* this better be the region's handler
*/
ACPI_ASSERT (region_obj->region.addr_handler == handler_obj);
region_obj->region.addr_handler = NULL;
return;
} /* found the right handler */
/*
* Move through the linked list of handlers
*/
last_obj_ptr = &obj_desc->region.next;
obj_desc = obj_desc->region.next;
}
/*
* If we get here, the region was not in the handler's region list
*/
return;
}