![Bob Moore](/assets/img/avatar_default.png)
For all GPEs, including FADT-based and GPE Block Devices, execute any _PRW methods in the new table, and process any _Lxx/_Exx GPE methods in the new table. Any runtime GPE that is referred to by an _Lxx/_Exx method in the new table is immediately enabled. ACPICA BZ 833. http://www.acpica.org/bugzilla/show_bug.cgi?id=833 Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
628 lines
18 KiB
C
628 lines
18 KiB
C
/******************************************************************************
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*
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* Module Name: exconfig - Namespace reconfiguration (Load/Unload opcodes)
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2010, Intel Corp.
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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 "accommon.h"
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#include "acinterp.h"
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#include "acnamesp.h"
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#include "actables.h"
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#include "acdispat.h"
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#include "acevents.h"
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#define _COMPONENT ACPI_EXECUTER
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ACPI_MODULE_NAME("exconfig")
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/* Local prototypes */
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static acpi_status
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acpi_ex_add_table(u32 table_index,
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struct acpi_namespace_node *parent_node,
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union acpi_operand_object **ddb_handle);
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static acpi_status
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acpi_ex_region_read(union acpi_operand_object *obj_desc,
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u32 length, u8 *buffer);
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_add_table
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*
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* PARAMETERS: Table - Pointer to raw table
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* parent_node - Where to load the table (scope)
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* ddb_handle - Where to return the table handle.
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*
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* RETURN: Status
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*
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* DESCRIPTION: Common function to Install and Load an ACPI table with a
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* returned table handle.
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*
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******************************************************************************/
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static acpi_status
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acpi_ex_add_table(u32 table_index,
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struct acpi_namespace_node *parent_node,
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union acpi_operand_object **ddb_handle)
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{
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union acpi_operand_object *obj_desc;
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acpi_status status;
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acpi_owner_id owner_id;
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ACPI_FUNCTION_TRACE(ex_add_table);
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/* Create an object to be the table handle */
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obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_REFERENCE);
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if (!obj_desc) {
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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/* Init the table handle */
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obj_desc->common.flags |= AOPOBJ_DATA_VALID;
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obj_desc->reference.class = ACPI_REFCLASS_TABLE;
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*ddb_handle = obj_desc;
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/* Install the new table into the local data structures */
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obj_desc->reference.value = table_index;
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/* Add the table to the namespace */
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status = acpi_ns_load_table(table_index, parent_node);
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if (ACPI_FAILURE(status)) {
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acpi_ut_remove_reference(obj_desc);
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*ddb_handle = NULL;
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return_ACPI_STATUS(status);
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}
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/* Execute any module-level code that was found in the table */
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acpi_ex_exit_interpreter();
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acpi_ns_exec_module_code_list();
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acpi_ex_enter_interpreter();
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/* Update GPEs for any new _PRW or _Lxx/_Exx methods. Ignore errors */
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status = acpi_tb_get_owner_id(table_index, &owner_id);
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if (ACPI_SUCCESS(status)) {
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acpi_ev_update_gpes(owner_id);
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}
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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_ex_load_table_op
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*
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* PARAMETERS: walk_state - Current state with operands
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* return_desc - Where to store the return object
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*
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* RETURN: Status
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*
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* DESCRIPTION: Load an ACPI table from the RSDT/XSDT
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*
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******************************************************************************/
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acpi_status
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acpi_ex_load_table_op(struct acpi_walk_state *walk_state,
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union acpi_operand_object **return_desc)
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{
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acpi_status status;
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union acpi_operand_object **operand = &walk_state->operands[0];
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struct acpi_namespace_node *parent_node;
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struct acpi_namespace_node *start_node;
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struct acpi_namespace_node *parameter_node = NULL;
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union acpi_operand_object *ddb_handle;
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struct acpi_table_header *table;
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u32 table_index;
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ACPI_FUNCTION_TRACE(ex_load_table_op);
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/* Validate lengths for the signature_string, OEMIDString, OEMtable_iD */
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if ((operand[0]->string.length > ACPI_NAME_SIZE) ||
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(operand[1]->string.length > ACPI_OEM_ID_SIZE) ||
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(operand[2]->string.length > ACPI_OEM_TABLE_ID_SIZE)) {
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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/* Find the ACPI table in the RSDT/XSDT */
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status = acpi_tb_find_table(operand[0]->string.pointer,
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operand[1]->string.pointer,
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operand[2]->string.pointer, &table_index);
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if (ACPI_FAILURE(status)) {
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if (status != AE_NOT_FOUND) {
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return_ACPI_STATUS(status);
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}
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/* Table not found, return an Integer=0 and AE_OK */
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ddb_handle = acpi_ut_create_integer_object((u64) 0);
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if (!ddb_handle) {
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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*return_desc = ddb_handle;
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return_ACPI_STATUS(AE_OK);
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}
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/* Default nodes */
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start_node = walk_state->scope_info->scope.node;
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parent_node = acpi_gbl_root_node;
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/* root_path (optional parameter) */
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if (operand[3]->string.length > 0) {
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/*
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* Find the node referenced by the root_path_string. This is the
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* location within the namespace where the table will be loaded.
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*/
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status =
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acpi_ns_get_node(start_node, operand[3]->string.pointer,
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ACPI_NS_SEARCH_PARENT, &parent_node);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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}
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/* parameter_path (optional parameter) */
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if (operand[4]->string.length > 0) {
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if ((operand[4]->string.pointer[0] != '\\') &&
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(operand[4]->string.pointer[0] != '^')) {
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/*
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* Path is not absolute, so it will be relative to the node
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* referenced by the root_path_string (or the NS root if omitted)
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*/
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start_node = parent_node;
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}
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/* Find the node referenced by the parameter_path_string */
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status =
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acpi_ns_get_node(start_node, operand[4]->string.pointer,
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ACPI_NS_SEARCH_PARENT, ¶meter_node);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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}
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/* Load the table into the namespace */
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status = acpi_ex_add_table(table_index, parent_node, &ddb_handle);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/* Parameter Data (optional) */
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if (parameter_node) {
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/* Store the parameter data into the optional parameter object */
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status = acpi_ex_store(operand[5],
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ACPI_CAST_PTR(union acpi_operand_object,
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parameter_node),
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walk_state);
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if (ACPI_FAILURE(status)) {
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(void)acpi_ex_unload_table(ddb_handle);
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acpi_ut_remove_reference(ddb_handle);
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return_ACPI_STATUS(status);
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}
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}
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status = acpi_get_table_by_index(table_index, &table);
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if (ACPI_SUCCESS(status)) {
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ACPI_INFO((AE_INFO, "Dynamic OEM Table Load:"));
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acpi_tb_print_table_header(0, table);
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}
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/* Invoke table handler if present */
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if (acpi_gbl_table_handler) {
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(void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_LOAD, table,
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acpi_gbl_table_handler_context);
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}
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*return_desc = ddb_handle;
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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_ex_region_read
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*
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* PARAMETERS: obj_desc - Region descriptor
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* Length - Number of bytes to read
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* Buffer - Pointer to where to put the data
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*
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* RETURN: Status
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*
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* DESCRIPTION: Read data from an operation region. The read starts from the
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* beginning of the region.
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*
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******************************************************************************/
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static acpi_status
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acpi_ex_region_read(union acpi_operand_object *obj_desc, u32 length, u8 *buffer)
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{
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acpi_status status;
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u64 value;
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u32 region_offset = 0;
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u32 i;
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/* Bytewise reads */
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for (i = 0; i < length; i++) {
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status = acpi_ev_address_space_dispatch(obj_desc, ACPI_READ,
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region_offset, 8,
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&value);
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if (ACPI_FAILURE(status)) {
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return status;
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}
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*buffer = (u8)value;
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buffer++;
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region_offset++;
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}
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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_ex_load_op
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*
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* PARAMETERS: obj_desc - Region or Buffer/Field where the table will be
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* obtained
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* Target - Where a handle to the table will be stored
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* walk_state - Current state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Load an ACPI table from a field or operation region
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*
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* NOTE: Region Fields (Field, bank_field, index_fields) are resolved to buffer
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* objects before this code is reached.
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*
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* If source is an operation region, it must refer to system_memory, as
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* per the ACPI specification.
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*
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******************************************************************************/
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acpi_status
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acpi_ex_load_op(union acpi_operand_object *obj_desc,
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union acpi_operand_object *target,
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struct acpi_walk_state *walk_state)
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{
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union acpi_operand_object *ddb_handle;
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struct acpi_table_header *table;
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struct acpi_table_desc table_desc;
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u32 table_index;
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acpi_status status;
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u32 length;
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ACPI_FUNCTION_TRACE(ex_load_op);
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ACPI_MEMSET(&table_desc, 0, sizeof(struct acpi_table_desc));
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/* Source Object can be either an op_region or a Buffer/Field */
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switch (obj_desc->common.type) {
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case ACPI_TYPE_REGION:
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
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"Load table from Region %p\n", obj_desc));
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/* Region must be system_memory (from ACPI spec) */
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if (obj_desc->region.space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) {
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return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
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}
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/*
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* If the Region Address and Length have not been previously evaluated,
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* evaluate them now and save the results.
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*/
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if (!(obj_desc->common.flags & AOPOBJ_DATA_VALID)) {
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status = acpi_ds_get_region_arguments(obj_desc);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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}
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/* Get the table header first so we can get the table length */
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table = ACPI_ALLOCATE(sizeof(struct acpi_table_header));
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if (!table) {
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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status =
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acpi_ex_region_read(obj_desc,
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sizeof(struct acpi_table_header),
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ACPI_CAST_PTR(u8, table));
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length = table->length;
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ACPI_FREE(table);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/* Must have at least an ACPI table header */
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if (length < sizeof(struct acpi_table_header)) {
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return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH);
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}
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/*
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* The original implementation simply mapped the table, with no copy.
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* However, the memory region is not guaranteed to remain stable and
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* we must copy the table to a local buffer. For example, the memory
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* region is corrupted after suspend on some machines. Dynamically
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* loaded tables are usually small, so this overhead is minimal.
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*
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* The latest implementation (5/2009) does not use a mapping at all.
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* We use the low-level operation region interface to read the table
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* instead of the obvious optimization of using a direct mapping.
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* This maintains a consistent use of operation regions across the
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* entire subsystem. This is important if additional processing must
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* be performed in the (possibly user-installed) operation region
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* handler. For example, acpi_exec and ASLTS depend on this.
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*/
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/* Allocate a buffer for the table */
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table_desc.pointer = ACPI_ALLOCATE(length);
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if (!table_desc.pointer) {
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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/* Read the entire table */
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status = acpi_ex_region_read(obj_desc, length,
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ACPI_CAST_PTR(u8,
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table_desc.pointer));
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if (ACPI_FAILURE(status)) {
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ACPI_FREE(table_desc.pointer);
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return_ACPI_STATUS(status);
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}
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table_desc.address = obj_desc->region.address;
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break;
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case ACPI_TYPE_BUFFER: /* Buffer or resolved region_field */
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
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"Load table from Buffer or Field %p\n",
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obj_desc));
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/* Must have at least an ACPI table header */
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if (obj_desc->buffer.length < sizeof(struct acpi_table_header)) {
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return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH);
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}
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/* Get the actual table length from the table header */
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table =
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ACPI_CAST_PTR(struct acpi_table_header,
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obj_desc->buffer.pointer);
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length = table->length;
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/* Table cannot extend beyond the buffer */
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if (length > obj_desc->buffer.length) {
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return_ACPI_STATUS(AE_AML_BUFFER_LIMIT);
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}
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if (length < sizeof(struct acpi_table_header)) {
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return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH);
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}
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/*
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* Copy the table from the buffer because the buffer could be modified
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* or even deleted in the future
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*/
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table_desc.pointer = ACPI_ALLOCATE(length);
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if (!table_desc.pointer) {
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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ACPI_MEMCPY(table_desc.pointer, table, length);
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table_desc.address = ACPI_TO_INTEGER(table_desc.pointer);
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break;
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default:
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return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
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}
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/* Validate table checksum (will not get validated in tb_add_table) */
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status = acpi_tb_verify_checksum(table_desc.pointer, length);
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if (ACPI_FAILURE(status)) {
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ACPI_FREE(table_desc.pointer);
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return_ACPI_STATUS(status);
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}
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/* Complete the table descriptor */
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table_desc.length = length;
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table_desc.flags = ACPI_TABLE_ORIGIN_ALLOCATED;
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/* Install the new table into the local data structures */
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status = acpi_tb_add_table(&table_desc, &table_index);
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if (ACPI_FAILURE(status)) {
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/* Delete allocated table buffer */
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acpi_tb_delete_table(&table_desc);
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return_ACPI_STATUS(status);
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}
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/*
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* Add the table to the namespace.
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*
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* Note: Load the table objects relative to the root of the namespace.
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* This appears to go against the ACPI specification, but we do it for
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* compatibility with other ACPI implementations.
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*/
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status =
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acpi_ex_add_table(table_index, acpi_gbl_root_node, &ddb_handle);
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if (ACPI_FAILURE(status)) {
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/* On error, table_ptr was deallocated above */
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return_ACPI_STATUS(status);
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}
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/* Store the ddb_handle into the Target operand */
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status = acpi_ex_store(ddb_handle, target, walk_state);
|
|
if (ACPI_FAILURE(status)) {
|
|
(void)acpi_ex_unload_table(ddb_handle);
|
|
|
|
/* table_ptr was deallocated above */
|
|
|
|
acpi_ut_remove_reference(ddb_handle);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
ACPI_INFO((AE_INFO, "Dynamic OEM Table Load:"));
|
|
acpi_tb_print_table_header(0, table_desc.pointer);
|
|
|
|
/* Remove the reference by added by acpi_ex_store above */
|
|
|
|
acpi_ut_remove_reference(ddb_handle);
|
|
|
|
/* Invoke table handler if present */
|
|
|
|
if (acpi_gbl_table_handler) {
|
|
(void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_LOAD,
|
|
table_desc.pointer,
|
|
acpi_gbl_table_handler_context);
|
|
}
|
|
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ex_unload_table
|
|
*
|
|
* PARAMETERS: ddb_handle - Handle to a previously loaded table
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Unload an ACPI table
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status acpi_ex_unload_table(union acpi_operand_object *ddb_handle)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
union acpi_operand_object *table_desc = ddb_handle;
|
|
u32 table_index;
|
|
struct acpi_table_header *table;
|
|
|
|
ACPI_FUNCTION_TRACE(ex_unload_table);
|
|
|
|
/*
|
|
* Validate the handle
|
|
* Although the handle is partially validated in acpi_ex_reconfiguration()
|
|
* when it calls acpi_ex_resolve_operands(), the handle is more completely
|
|
* validated here.
|
|
*
|
|
* Handle must be a valid operand object of type reference. Also, the
|
|
* ddb_handle must still be marked valid (table has not been previously
|
|
* unloaded)
|
|
*/
|
|
if ((!ddb_handle) ||
|
|
(ACPI_GET_DESCRIPTOR_TYPE(ddb_handle) != ACPI_DESC_TYPE_OPERAND) ||
|
|
(ddb_handle->common.type != ACPI_TYPE_LOCAL_REFERENCE) ||
|
|
(!(ddb_handle->common.flags & AOPOBJ_DATA_VALID))) {
|
|
return_ACPI_STATUS(AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/* Get the table index from the ddb_handle */
|
|
|
|
table_index = table_desc->reference.value;
|
|
|
|
/* Ensure the table is still loaded */
|
|
|
|
if (!acpi_tb_is_table_loaded(table_index)) {
|
|
return_ACPI_STATUS(AE_NOT_EXIST);
|
|
}
|
|
|
|
/* Invoke table handler if present */
|
|
|
|
if (acpi_gbl_table_handler) {
|
|
status = acpi_get_table_by_index(table_index, &table);
|
|
if (ACPI_SUCCESS(status)) {
|
|
(void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_UNLOAD,
|
|
table,
|
|
acpi_gbl_table_handler_context);
|
|
}
|
|
}
|
|
|
|
/* Delete the portion of the namespace owned by this table */
|
|
|
|
status = acpi_tb_delete_namespace_by_owner(table_index);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
(void)acpi_tb_release_owner_id(table_index);
|
|
acpi_tb_set_table_loaded_flag(table_index, FALSE);
|
|
|
|
/*
|
|
* Invalidate the handle. We do this because the handle may be stored
|
|
* in a named object and may not be actually deleted until much later.
|
|
*/
|
|
ddb_handle->common.flags &= ~AOPOBJ_DATA_VALID;
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|