/*******************************************************************************
*
- * Module Name: nseval - Object evaluation interfaces -- includes control
- * method lookup and execution.
+ * Module Name: nseval - Object evaluation, includes control method execution
*
******************************************************************************/
/*
- * Copyright (C) 2000 - 2006, R. Byron Moore
+ * Copyright (C) 2000 - 2007, R. Byron Moore
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
#define _COMPONENT ACPI_NAMESPACE
ACPI_MODULE_NAME("nseval")
-/* Local prototypes */
-static acpi_status
-acpi_ns_execute_control_method(struct acpi_parameter_info *info);
-
-static acpi_status acpi_ns_get_object_value(struct acpi_parameter_info *info);
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_ns_evaluate_relative
- *
- * PARAMETERS: Pathname - Name of method to execute, If NULL, the
- * handle is the object to execute
- * Info - Method info block, contains:
- * return_object - Where to put method's return value (if
- * any). If NULL, no value is returned.
- * Params - List of parameters to pass to the method,
- * terminated by NULL. Params itself may be
- * NULL if no parameters are being passed.
- *
- * RETURN: Status
- *
- * DESCRIPTION: Evaluate the object or find and execute the requested method
- *
- * MUTEX: Locks Namespace
- *
- ******************************************************************************/
-
-acpi_status
-acpi_ns_evaluate_relative(char *pathname, struct acpi_parameter_info *info)
-{
- acpi_status status;
- struct acpi_namespace_node *node = NULL;
- union acpi_generic_state *scope_info;
- char *internal_path = NULL;
-
- ACPI_FUNCTION_TRACE("ns_evaluate_relative");
-
- /*
- * Must have a valid object handle
- */
- if (!info || !info->node) {
- return_ACPI_STATUS(AE_BAD_PARAMETER);
- }
-
- /* Build an internal name string for the method */
-
- status = acpi_ns_internalize_name(pathname, &internal_path);
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
-
- scope_info = acpi_ut_create_generic_state();
- if (!scope_info) {
- goto cleanup1;
- }
-
- /* Get the prefix handle and Node */
-
- status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
- if (ACPI_FAILURE(status)) {
- goto cleanup;
- }
-
- info->node = acpi_ns_map_handle_to_node(info->node);
- if (!info->node) {
- (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
- status = AE_BAD_PARAMETER;
- goto cleanup;
- }
-
- /* Lookup the name in the namespace */
-
- scope_info->scope.node = info->node;
- status = acpi_ns_lookup(scope_info, internal_path, ACPI_TYPE_ANY,
- ACPI_IMODE_EXECUTE, ACPI_NS_NO_UPSEARCH, NULL,
- &node);
-
- (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
-
- if (ACPI_FAILURE(status)) {
- ACPI_DEBUG_PRINT((ACPI_DB_NAMES, "Object [%s] not found [%s]\n",
- pathname, acpi_format_exception(status)));
- goto cleanup;
- }
-
- /*
- * Now that we have a handle to the object, we can attempt to evaluate it.
- */
- ACPI_DEBUG_PRINT((ACPI_DB_NAMES, "%s [%p] Value %p\n",
- pathname, node, acpi_ns_get_attached_object(node)));
-
- info->node = node;
- status = acpi_ns_evaluate_by_handle(info);
-
- ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
- "*** Completed eval of object %s ***\n", pathname));
-
- cleanup:
- acpi_ut_delete_generic_state(scope_info);
-
- cleanup1:
- ACPI_MEM_FREE(internal_path);
- return_ACPI_STATUS(status);
-}
-
/*******************************************************************************
*
- * FUNCTION: acpi_ns_evaluate_by_name
+ * FUNCTION: acpi_ns_evaluate
*
- * PARAMETERS: Pathname - Fully qualified pathname to the object
- * Info - Method info block, contains:
- * return_object - Where to put method's return value (if
- * any). If NULL, no value is returned.
- * Params - List of parameters to pass to the method,
- * terminated by NULL. Params itself may be
- * NULL if no parameters are being passed.
- *
- * RETURN: Status
- *
- * DESCRIPTION: Evaluate the object or rind and execute the requested method
- * passing the given parameters
- *
- * MUTEX: Locks Namespace
- *
- ******************************************************************************/
-
-acpi_status
-acpi_ns_evaluate_by_name(char *pathname, struct acpi_parameter_info *info)
-{
- acpi_status status;
- char *internal_path = NULL;
-
- ACPI_FUNCTION_TRACE("ns_evaluate_by_name");
-
- /* Build an internal name string for the method */
-
- status = acpi_ns_internalize_name(pathname, &internal_path);
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
-
- status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
- if (ACPI_FAILURE(status)) {
- goto cleanup;
- }
-
- /* Lookup the name in the namespace */
-
- status = acpi_ns_lookup(NULL, internal_path, ACPI_TYPE_ANY,
- ACPI_IMODE_EXECUTE, ACPI_NS_NO_UPSEARCH, NULL,
- &info->node);
-
- (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
-
- if (ACPI_FAILURE(status)) {
- ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
- "Object at [%s] was not found, status=%.4X\n",
- pathname, status));
- goto cleanup;
- }
-
- /*
- * Now that we have a handle to the object, we can attempt to evaluate it.
- */
- ACPI_DEBUG_PRINT((ACPI_DB_NAMES, "%s [%p] Value %p\n",
- pathname, info->node,
- acpi_ns_get_attached_object(info->node)));
-
- status = acpi_ns_evaluate_by_handle(info);
-
- ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
- "*** Completed eval of object %s ***\n", pathname));
-
- cleanup:
-
- /* Cleanup */
-
- if (internal_path) {
- ACPI_MEM_FREE(internal_path);
- }
-
- return_ACPI_STATUS(status);
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_ns_evaluate_by_handle
- *
- * PARAMETERS: Info - Method info block, contains:
- * Node - Method/Object Node to execute
+ * PARAMETERS: Info - Evaluation info block, contains:
+ * prefix_node - Prefix or Method/Object Node to execute
+ * Pathname - Name of method to execute, If NULL, the
+ * Node is the object to execute
* Parameters - List of parameters to pass to the method,
* terminated by NULL. Params itself may be
* NULL if no parameters are being passed.
* parameter_type - Type of Parameter list
* return_object - Where to put method's return value (if
* any). If NULL, no value is returned.
+ * Flags - ACPI_IGNORE_RETURN_VALUE to delete return
*
* RETURN: Status
*
- * DESCRIPTION: Evaluate object or execute the requested method passing the
- * given parameters
+ * DESCRIPTION: Execute a control method or return the current value of an
+ * ACPI namespace object.
*
- * MUTEX: Locks Namespace
+ * MUTEX: Locks interpreter
*
******************************************************************************/
-
-acpi_status acpi_ns_evaluate_by_handle(struct acpi_parameter_info *info)
+acpi_status acpi_ns_evaluate(struct acpi_evaluate_info *info)
{
acpi_status status;
- ACPI_FUNCTION_TRACE("ns_evaluate_by_handle");
-
- /* Check if namespace has been initialized */
-
- if (!acpi_gbl_root_node) {
- return_ACPI_STATUS(AE_NO_NAMESPACE);
- }
-
- /* Parameter Validation */
+ ACPI_FUNCTION_TRACE(ns_evaluate);
if (!info) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
info->return_object = NULL;
- /* Get the prefix handle and Node */
-
- status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+ /*
+ * Get the actual namespace node for the target object. Handles these cases:
+ *
+ * 1) Null node, Pathname (absolute path)
+ * 2) Node, Pathname (path relative to Node)
+ * 3) Node, Null Pathname
+ */
+ status = acpi_ns_get_node(info->prefix_node, info->pathname,
+ ACPI_NS_NO_UPSEARCH, &info->resolved_node);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
- info->node = acpi_ns_map_handle_to_node(info->node);
- if (!info->node) {
- (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
- return_ACPI_STATUS(AE_BAD_PARAMETER);
- }
-
/*
* For a method alias, we must grab the actual method node so that proper
* scoping context will be established before execution.
*/
- if (acpi_ns_get_type(info->node) == ACPI_TYPE_LOCAL_METHOD_ALIAS) {
- info->node =
+ if (acpi_ns_get_type(info->resolved_node) ==
+ ACPI_TYPE_LOCAL_METHOD_ALIAS) {
+ info->resolved_node =
ACPI_CAST_PTR(struct acpi_namespace_node,
- info->node->object);
+ info->resolved_node->object);
}
+ ACPI_DEBUG_PRINT((ACPI_DB_NAMES, "%s [%p] Value %p\n", info->pathname,
+ info->resolved_node,
+ acpi_ns_get_attached_object(info->resolved_node)));
+
/*
* Two major cases here:
- * 1) The object is an actual control method -- execute it.
- * 2) The object is not a method -- just return it's current value
*
- * In both cases, the namespace is unlocked by the acpi_ns* procedure
+ * 1) The object is a control method -- execute it
+ * 2) The object is not a method -- just return it's current value
*/
- if (acpi_ns_get_type(info->node) == ACPI_TYPE_METHOD) {
+ if (acpi_ns_get_type(info->resolved_node) == ACPI_TYPE_METHOD) {
/*
- * Case 1) We have an actual control method to execute
+ * 1) Object is a control method - execute it
*/
- status = acpi_ns_execute_control_method(info);
- } else {
- /*
- * Case 2) Object is NOT a method, just return its current value
- */
- status = acpi_ns_get_object_value(info);
- }
-
- /*
- * Check if there is a return value on the stack that must be dealt with
- */
- if (status == AE_CTRL_RETURN_VALUE) {
- /* Map AE_CTRL_RETURN_VALUE to AE_OK, we are done with it */
-
- status = AE_OK;
- }
-
- /*
- * Namespace was unlocked by the handling acpi_ns* function, so we
- * just return
- */
- return_ACPI_STATUS(status);
-}
-/*******************************************************************************
- *
- * FUNCTION: acpi_ns_execute_control_method
- *
- * PARAMETERS: Info - Method info block, contains:
- * Node - Method Node to execute
- * obj_desc - Method object
- * Parameters - List of parameters to pass to the method,
- * terminated by NULL. Params itself may be
- * NULL if no parameters are being passed.
- * return_object - Where to put method's return value (if
- * any). If NULL, no value is returned.
- * parameter_type - Type of Parameter list
- * return_object - Where to put method's return value (if
- * any). If NULL, no value is returned.
- *
- * RETURN: Status
- *
- * DESCRIPTION: Execute the requested method passing the given parameters
- *
- * MUTEX: Assumes namespace is locked
- *
- ******************************************************************************/
-
-static acpi_status
-acpi_ns_execute_control_method(struct acpi_parameter_info *info)
-{
- acpi_status status;
-
- ACPI_FUNCTION_TRACE("ns_execute_control_method");
-
- /* Verify that there is a method associated with this object */
-
- info->obj_desc = acpi_ns_get_attached_object(info->node);
- if (!info->obj_desc) {
- ACPI_ERROR((AE_INFO, "No attached method object"));
-
- (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
- return_ACPI_STATUS(AE_NULL_OBJECT);
- }
-
- ACPI_DUMP_PATHNAME(info->node, "Execute Method:",
- ACPI_LV_INFO, _COMPONENT);
-
- ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Method at AML address %p Length %X\n",
- info->obj_desc->method.aml_start + 1,
- info->obj_desc->method.aml_length - 1));
-
- /*
- * Unlock the namespace before execution. This allows namespace access
- * via the external Acpi* interfaces while a method is being executed.
- * However, any namespace deletion must acquire both the namespace and
- * interpreter locks to ensure that no thread is using the portion of the
- * namespace that is being deleted.
- */
- status = acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
-
- /*
- * Execute the method via the interpreter. The interpreter is locked
- * here before calling into the AML parser
- */
- status = acpi_ex_enter_interpreter();
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
+ /* Verify that there is a method object associated with this node */
- status = acpi_ps_execute_method(info);
- acpi_ex_exit_interpreter();
+ info->obj_desc =
+ acpi_ns_get_attached_object(info->resolved_node);
+ if (!info->obj_desc) {
+ ACPI_ERROR((AE_INFO,
+ "Control method has no attached sub-object"));
+ return_ACPI_STATUS(AE_NULL_OBJECT);
+ }
- return_ACPI_STATUS(status);
-}
+ ACPI_DUMP_PATHNAME(info->resolved_node, "Execute Method:",
+ ACPI_LV_INFO, _COMPONENT);
-/*******************************************************************************
- *
- * FUNCTION: acpi_ns_get_object_value
- *
- * PARAMETERS: Info - Method info block, contains:
- * Node - Object's NS node
- * return_object - Where to put object value (if
- * any). If NULL, no value is returned.
- *
- * RETURN: Status
- *
- * DESCRIPTION: Return the current value of the object
- *
- * MUTEX: Assumes namespace is locked, leaves namespace unlocked
- *
- ******************************************************************************/
+ ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+ "Method at AML address %p Length %X\n",
+ info->obj_desc->method.aml_start + 1,
+ info->obj_desc->method.aml_length - 1));
-static acpi_status acpi_ns_get_object_value(struct acpi_parameter_info *info)
-{
- acpi_status status = AE_OK;
- struct acpi_namespace_node *resolved_node = info->node;
+ /*
+ * Any namespace deletion must acquire both the namespace and
+ * interpreter locks to ensure that no thread is using the portion of
+ * the namespace that is being deleted.
+ *
+ * Execute the method via the interpreter. The interpreter is locked
+ * here before calling into the AML parser
+ */
+ acpi_ex_enter_interpreter();
+ status = acpi_ps_execute_method(info);
+ acpi_ex_exit_interpreter();
+ } else {
+ /*
+ * 2) Object is not a method, return its current value
+ */
- ACPI_FUNCTION_TRACE("ns_get_object_value");
+ /*
+ * Objects require additional resolution steps (e.g., the Node may be
+ * a field that must be read, etc.) -- we can't just grab the object
+ * out of the node.
+ *
+ * Use resolve_node_to_value() to get the associated value.
+ *
+ * NOTE: we can get away with passing in NULL for a walk state because
+ * resolved_node is guaranteed to not be a reference to either a method
+ * local or a method argument (because this interface is never called
+ * from a running method.)
+ *
+ * Even though we do not directly invoke the interpreter for object
+ * resolution, we must lock it because we could access an opregion.
+ * The opregion access code assumes that the interpreter is locked.
+ */
+ acpi_ex_enter_interpreter();
- /*
- * Objects require additional resolution steps (e.g., the Node may be a
- * field that must be read, etc.) -- we can't just grab the object out of
- * the node.
- */
+ /* Function has a strange interface */
- /*
- * Use resolve_node_to_value() to get the associated value. This call always
- * deletes obj_desc (allocated above).
- *
- * NOTE: we can get away with passing in NULL for a walk state because
- * obj_desc is guaranteed to not be a reference to either a method local or
- * a method argument (because this interface can only be called from the
- * acpi_evaluate external interface, never called from a running method.)
- *
- * Even though we do not directly invoke the interpreter for this, we must
- * enter it because we could access an opregion. The opregion access code
- * assumes that the interpreter is locked.
- *
- * We must release the namespace lock before entering the intepreter.
- */
- status = acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
+ status =
+ acpi_ex_resolve_node_to_value(&info->resolved_node, NULL);
+ acpi_ex_exit_interpreter();
- status = acpi_ex_enter_interpreter();
- if (ACPI_SUCCESS(status)) {
- status = acpi_ex_resolve_node_to_value(&resolved_node, NULL);
/*
* If acpi_ex_resolve_node_to_value() succeeded, the return value was placed
* in resolved_node.
*/
- acpi_ex_exit_interpreter();
-
if (ACPI_SUCCESS(status)) {
status = AE_CTRL_RETURN_VALUE;
- info->return_object = ACPI_CAST_PTR
- (union acpi_operand_object, resolved_node);
+ info->return_object =
+ ACPI_CAST_PTR(union acpi_operand_object,
+ info->resolved_node);
+
ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
"Returning object %p [%s]\n",
info->return_object,
}
}
- /* Namespace is unlocked */
+ /*
+ * Check if there is a return value that must be dealt with
+ */
+ if (status == AE_CTRL_RETURN_VALUE) {
+
+ /* If caller does not want the return value, delete it */
+ if (info->flags & ACPI_IGNORE_RETURN_VALUE) {
+ acpi_ut_remove_reference(info->return_object);
+ info->return_object = NULL;
+ }
+
+ /* Map AE_CTRL_RETURN_VALUE to AE_OK, we are done with it */
+
+ status = AE_OK;
+ }
+
+ ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
+ "*** Completed evaluation of object %s ***\n",
+ info->pathname));
+
+ /*
+ * Namespace was unlocked by the handling acpi_ns* function, so we
+ * just return
+ */
return_ACPI_STATUS(status);
}
git.openpandora.org / pandora-kernel.git / blobdiff