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