/******************************************************************************
*
* Module Name: nsinit - namespace initialization
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2005, R. Byron Moore
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#include <acpi/acpi.h>
#include <acpi/acnamesp.h>
#include <acpi/acdispat.h>
#include <acpi/acinterp.h>
#define _COMPONENT ACPI_NAMESPACE
ACPI_MODULE_NAME ("nsinit")
/* Local prototypes */
static acpi_status
acpi_ns_init_one_object (
acpi_handle obj_handle,
u32 level,
void *context,
void **return_value);
static acpi_status
acpi_ns_init_one_device (
acpi_handle obj_handle,
u32 nesting_level,
void *context,
void **return_value);
/*******************************************************************************
*
* FUNCTION: acpi_ns_initialize_objects
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Walk the entire namespace and perform any necessary
* initialization on the objects found therein
*
******************************************************************************/
acpi_status
acpi_ns_initialize_objects (
void)
{
acpi_status status;
struct acpi_init_walk_info info;
ACPI_FUNCTION_TRACE ("ns_initialize_objects");
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
"**** Starting initialization of namespace objects ****\n"));
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
"Completing Region/Field/Buffer/Package initialization:"));
/* Set all init info to zero */
ACPI_MEMSET (&info, 0, sizeof (struct acpi_init_walk_info));
/* Walk entire namespace from the supplied root */
status = acpi_walk_namespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX, acpi_ns_init_one_object,
&info, NULL);
if (ACPI_FAILURE (status)) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "walk_namespace failed! %s\n",
acpi_format_exception (status)));
}
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
"\nInitialized %hd/%hd Regions %hd/%hd Fields %hd/%hd Buffers %hd/%hd Packages (%hd nodes)\n",
info.op_region_init, info.op_region_count,
info.field_init, info.field_count,
info.buffer_init, info.buffer_count,
info.package_init, info.package_count, info.object_count));
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
"%hd Control Methods found\n", info.method_count));
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
"%hd Op Regions found\n", info.op_region_count));
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ns_initialize_devices
*
* PARAMETERS: None
*
* RETURN: acpi_status
*
* DESCRIPTION: Walk the entire namespace and initialize all ACPI devices.
* This means running _INI on all present devices.
*
* Note: We install PCI config space handler on region access,
* not here.
*
******************************************************************************/
acpi_status
acpi_ns_initialize_devices (
void)
{
acpi_status status;
struct acpi_device_walk_info info;
ACPI_FUNCTION_TRACE ("ns_initialize_devices");
/* Init counters */
info.device_count = 0;
info.num_STA = 0;
info.num_INI = 0;
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
"Executing all Device _STA and_INI methods:"));
status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/* Walk namespace for all objects */
status = acpi_ns_walk_namespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX, TRUE, acpi_ns_init_one_device, &info, NULL);
(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (status)) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "walk_namespace failed! %s\n",
acpi_format_exception (status)));
}
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
"\n%hd Devices found containing: %hd _STA, %hd _INI methods\n",
info.device_count, info.num_STA, info.num_INI));
return_ACPI_STATUS (status);
}
/*******************************************************************************
*
* FUNCTION: acpi_ns_init_one_object
*
* PARAMETERS: obj_handle - Node
* Level - Current nesting level
* Context - Points to a init info struct
* return_value - Not used
*
* RETURN: Status
*
* DESCRIPTION: Callback from acpi_walk_namespace. Invoked for every object
* within the namespace.
*
* Currently, the only objects that require initialization are:
* 1) Methods
* 2) Op Regions
*
******************************************************************************/
static acpi_status
acpi_ns_init_one_object (
acpi_handle obj_handle,
u32 level,
void *context,
void **return_value)
{
acpi_object_type type;
acpi_status status;
struct acpi_init_walk_info *info = (struct acpi_init_walk_info *) context;
struct acpi_namespace_node *node = (struct acpi_namespace_node *) obj_handle;
union acpi_operand_object *obj_desc;
ACPI_FUNCTION_NAME ("ns_init_one_object");
info->object_count++;
/* And even then, we are only interested in a few object types */
type = acpi_ns_get_type (obj_handle);
obj_desc = acpi_ns_get_attached_object (node);
if (!obj_desc) {
return (AE_OK);
}
/* Increment counters for object types we are looking for */
switch (type) {
case ACPI_TYPE_REGION:
info->op_region_count++;
break;
case ACPI_TYPE_BUFFER_FIELD:
info->field_count++;
break;
case ACPI_TYPE_BUFFER:
info->buffer_count++;
break;
case ACPI_TYPE_PACKAGE:
info->package_count++;
break;
default:
/* No init required, just exit now */
return (AE_OK);
}
/*
* If the object is already initialized, nothing else to do
*/
if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
return (AE_OK);
}
/*
* Must lock the interpreter before executing AML code
*/
status = acpi_ex_enter_interpreter ();
if (ACPI_FAILURE (status)) {
return (status);
}
/*
* Each of these types can contain executable AML code within the
* declaration.
*/
switch (type) {
case ACPI_TYPE_REGION:
info->op_region_init++;
status = acpi_ds_get_region_arguments (obj_desc);
break;
case ACPI_TYPE_BUFFER_FIELD:
info->field_init++;
status = acpi_ds_get_buffer_field_arguments (obj_desc);
break;
case ACPI_TYPE_BUFFER:
info->buffer_init++;
status = acpi_ds_get_buffer_arguments (obj_desc);
break;
case ACPI_TYPE_PACKAGE:
info->package_init++;
status = acpi_ds_get_package_arguments (obj_desc);
break;
default:
/* No other types can get here */
break;
}
if (ACPI_FAILURE (status)) {
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_ERROR, "\n"));
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Could not execute arguments for [%4.4s] (%s), %s\n",
acpi_ut_get_node_name (node), acpi_ut_get_type_name (type),
acpi_format_exception (status)));
}
/*
* Print a dot for each object unless we are going to print the entire
* pathname
*/
if (!(acpi_dbg_level & ACPI_LV_INIT_NAMES)) {
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, "."));
}
/*
* We ignore errors from above, and always return OK, since we don't want
* to abort the walk on any single error.
*/
acpi_ex_exit_interpreter ();
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ns_init_one_device
*
* PARAMETERS: acpi_walk_callback
*
* RETURN: acpi_status
*
* DESCRIPTION: This is called once per device soon after ACPI is enabled
* to initialize each device. It determines if the device is
* present, and if so, calls _INI.
*
******************************************************************************/
static acpi_status
acpi_ns_init_one_device (
acpi_handle obj_handle,
u32 nesting_level,
void *context,
void **return_value)
{
struct acpi_device_walk_info *info = (struct acpi_device_walk_info *) context;
struct acpi_parameter_info pinfo;
u32 flags;
acpi_status status;
ACPI_FUNCTION_TRACE ("ns_init_one_device");
pinfo.parameters = NULL;
pinfo.parameter_type = ACPI_PARAM_ARGS;
pinfo.node = acpi_ns_map_handle_to_node (obj_handle);
if (!pinfo.node) {
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/*
* We will run _STA/_INI on Devices, Processors and thermal_zones only
*/
if ((pinfo.node->type != ACPI_TYPE_DEVICE) &&
(pinfo.node->type != ACPI_TYPE_PROCESSOR) &&
(pinfo.node->type != ACPI_TYPE_THERMAL)) {
return_ACPI_STATUS (AE_OK);
}
if ((acpi_dbg_level <= ACPI_LV_ALL_EXCEPTIONS) &&
(!(acpi_dbg_level & ACPI_LV_INFO))) {
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, "."));
}
info->device_count++;
/*
* Run _STA to determine if we can run _INI on the device.
*/
ACPI_DEBUG_EXEC (acpi_ut_display_init_pathname (ACPI_TYPE_METHOD,
pinfo.node, METHOD_NAME__STA));
status = acpi_ut_execute_STA (pinfo.node, &flags);
if (ACPI_FAILURE (status)) {
if (pinfo.node->type == ACPI_TYPE_DEVICE) {
/* Ignore error and move on to next device */
return_ACPI_STATUS (AE_OK);
}
/* _STA is not required for Processor or thermal_zone objects */
}
else {
info->num_STA++;
if (!(flags & 0x01)) {
/* Don't look at children of a not present device */
return_ACPI_STATUS(AE_CTRL_DEPTH);
}
}
/*
* The device is present. Run _INI.
*/
ACPI_DEBUG_EXEC (acpi_ut_display_init_pathname (ACPI_TYPE_METHOD,
pinfo.node, METHOD_NAME__INI));
status = acpi_ns_evaluate_relative (METHOD_NAME__INI, &pinfo);
if (ACPI_FAILURE (status)) {
/* No _INI (AE_NOT_FOUND) means device requires no initialization */
if (status != AE_NOT_FOUND) {
/* Ignore error and move on to next device */
#ifdef ACPI_DEBUG_OUTPUT
char *scope_name = acpi_ns_get_external_pathname (pinfo.node);
ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "%s._INI failed: %s\n",
scope_name, acpi_format_exception (status)));
ACPI_MEM_FREE (scope_name);
#endif
}
status = AE_OK;
}
else {
/* Delete any return object (especially if implicit_return is enabled) */
if (pinfo.return_object) {
acpi_ut_remove_reference (pinfo.return_object);
}
/* Count of successful INIs */
info->num_INI++;
}
if (acpi_gbl_init_handler) {
/* External initialization handler is present, call it */
status = acpi_gbl_init_handler (pinfo.node, ACPI_INIT_DEVICE_INI);
}
return_ACPI_STATUS (status);
}
