647 строки
19 KiB
C
647 строки
19 KiB
C
/******************************************************************************
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*
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* Module Name: tbinstal - ACPI table installation and removal
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2012, 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 "acnamesp.h"
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#include "actables.h"
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#define _COMPONENT ACPI_TABLES
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ACPI_MODULE_NAME("tbinstal")
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/******************************************************************************
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*
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* FUNCTION: acpi_tb_verify_table
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*
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* PARAMETERS: table_desc - table
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*
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* RETURN: Status
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*
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* DESCRIPTION: this function is called to verify and map table
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*
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*****************************************************************************/
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acpi_status acpi_tb_verify_table(struct acpi_table_desc *table_desc)
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{
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acpi_status status = AE_OK;
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ACPI_FUNCTION_TRACE(tb_verify_table);
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/* Map the table if necessary */
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if (!table_desc->pointer) {
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if ((table_desc->flags & ACPI_TABLE_ORIGIN_MASK) ==
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ACPI_TABLE_ORIGIN_MAPPED) {
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table_desc->pointer =
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acpi_os_map_memory(table_desc->address,
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table_desc->length);
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}
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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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}
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/* FACS is the odd table, has no standard ACPI header and no checksum */
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if (!ACPI_COMPARE_NAME(&table_desc->signature, ACPI_SIG_FACS)) {
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/* Always calculate checksum, ignore bad checksum if requested */
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status =
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acpi_tb_verify_checksum(table_desc->pointer,
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table_desc->length);
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}
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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_tb_add_table
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*
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* PARAMETERS: table_desc - Table descriptor
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* table_index - Where the table index is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: This function is called to add an ACPI table. It is used to
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* dynamically load tables via the Load and load_table AML
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* operators.
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*
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******************************************************************************/
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acpi_status
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acpi_tb_add_table(struct acpi_table_desc *table_desc, u32 *table_index)
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{
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u32 i;
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acpi_status status = AE_OK;
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struct acpi_table_header *override_table = NULL;
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ACPI_FUNCTION_TRACE(tb_add_table);
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if (!table_desc->pointer) {
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status = acpi_tb_verify_table(table_desc);
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if (ACPI_FAILURE(status) || !table_desc->pointer) {
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return_ACPI_STATUS(status);
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}
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}
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/*
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* Validate the incoming table signature.
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*
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* 1) Originally, we checked the table signature for "SSDT" or "PSDT".
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* 2) We added support for OEMx tables, signature "OEM".
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* 3) Valid tables were encountered with a null signature, so we just
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* gave up on validating the signature, (05/2008).
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* 4) We encountered non-AML tables such as the MADT, which caused
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* interpreter errors and kernel faults. So now, we once again allow
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* only "SSDT", "OEMx", and now, also a null signature. (05/2011).
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*/
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if ((table_desc->pointer->signature[0] != 0x00) &&
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(!ACPI_COMPARE_NAME(table_desc->pointer->signature, ACPI_SIG_SSDT))
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&& (ACPI_STRNCMP(table_desc->pointer->signature, "OEM", 3))) {
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ACPI_ERROR((AE_INFO,
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"Table has invalid signature [%4.4s] (0x%8.8X), must be SSDT or OEMx",
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acpi_ut_valid_acpi_name(*(u32 *)table_desc->
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pointer->
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signature) ? table_desc->
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pointer->signature : "????",
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*(u32 *)table_desc->pointer->signature));
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return_ACPI_STATUS(AE_BAD_SIGNATURE);
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}
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(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
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/* Check if table is already registered */
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for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) {
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if (!acpi_gbl_root_table_list.tables[i].pointer) {
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status =
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acpi_tb_verify_table(&acpi_gbl_root_table_list.
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tables[i]);
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if (ACPI_FAILURE(status)
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|| !acpi_gbl_root_table_list.tables[i].pointer) {
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continue;
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}
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}
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/*
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* Check for a table match on the entire table length,
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* not just the header.
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*/
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if (table_desc->length !=
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acpi_gbl_root_table_list.tables[i].length) {
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continue;
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}
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if (ACPI_MEMCMP(table_desc->pointer,
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acpi_gbl_root_table_list.tables[i].pointer,
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acpi_gbl_root_table_list.tables[i].length)) {
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continue;
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}
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/*
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* Note: the current mechanism does not unregister a table if it is
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* dynamically unloaded. The related namespace entries are deleted,
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* but the table remains in the root table list.
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*
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* The assumption here is that the number of different tables that
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* will be loaded is actually small, and there is minimal overhead
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* in just keeping the table in case it is needed again.
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*
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* If this assumption changes in the future (perhaps on large
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* machines with many table load/unload operations), tables will
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* need to be unregistered when they are unloaded, and slots in the
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* root table list should be reused when empty.
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*/
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/*
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* Table is already registered.
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* We can delete the table that was passed as a parameter.
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*/
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acpi_tb_delete_table(table_desc);
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*table_index = i;
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if (acpi_gbl_root_table_list.tables[i].
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flags & ACPI_TABLE_IS_LOADED) {
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/* Table is still loaded, this is an error */
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status = AE_ALREADY_EXISTS;
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goto release;
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} else {
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/* Table was unloaded, allow it to be reloaded */
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table_desc->pointer =
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acpi_gbl_root_table_list.tables[i].pointer;
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table_desc->address =
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acpi_gbl_root_table_list.tables[i].address;
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status = AE_OK;
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goto print_header;
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}
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}
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/*
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* ACPI Table Override:
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* Allow the host to override dynamically loaded tables.
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*/
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status = acpi_os_table_override(table_desc->pointer, &override_table);
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if (ACPI_SUCCESS(status) && override_table) {
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ACPI_INFO((AE_INFO,
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"%4.4s @ 0x%p Table override, replaced with:",
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table_desc->pointer->signature,
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ACPI_CAST_PTR(void, table_desc->address)));
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/* We can delete the table that was passed as a parameter */
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acpi_tb_delete_table(table_desc);
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/* Setup descriptor for the new table */
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table_desc->address = ACPI_PTR_TO_PHYSADDR(override_table);
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table_desc->pointer = override_table;
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table_desc->length = override_table->length;
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table_desc->flags = ACPI_TABLE_ORIGIN_OVERRIDE;
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}
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/* Add the table to the global root table list */
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status = acpi_tb_store_table(table_desc->address, table_desc->pointer,
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table_desc->length, table_desc->flags,
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table_index);
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if (ACPI_FAILURE(status)) {
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goto release;
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}
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print_header:
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acpi_tb_print_table_header(table_desc->address, table_desc->pointer);
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release:
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(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
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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_tb_resize_root_table_list
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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: Expand the size of global table array
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*
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******************************************************************************/
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acpi_status acpi_tb_resize_root_table_list(void)
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{
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struct acpi_table_desc *tables;
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ACPI_FUNCTION_TRACE(tb_resize_root_table_list);
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/* allow_resize flag is a parameter to acpi_initialize_tables */
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if (!(acpi_gbl_root_table_list.flags & ACPI_ROOT_ALLOW_RESIZE)) {
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ACPI_ERROR((AE_INFO,
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"Resize of Root Table Array is not allowed"));
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return_ACPI_STATUS(AE_SUPPORT);
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}
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/* Increase the Table Array size */
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tables = ACPI_ALLOCATE_ZEROED(((acpi_size) acpi_gbl_root_table_list.
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max_table_count +
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ACPI_ROOT_TABLE_SIZE_INCREMENT) *
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sizeof(struct acpi_table_desc));
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if (!tables) {
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ACPI_ERROR((AE_INFO,
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"Could not allocate new root table array"));
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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/* Copy and free the previous table array */
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if (acpi_gbl_root_table_list.tables) {
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ACPI_MEMCPY(tables, acpi_gbl_root_table_list.tables,
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(acpi_size) acpi_gbl_root_table_list.
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max_table_count * sizeof(struct acpi_table_desc));
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if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
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ACPI_FREE(acpi_gbl_root_table_list.tables);
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}
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}
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acpi_gbl_root_table_list.tables = tables;
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acpi_gbl_root_table_list.max_table_count +=
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ACPI_ROOT_TABLE_SIZE_INCREMENT;
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acpi_gbl_root_table_list.flags |= (u8)ACPI_ROOT_ORIGIN_ALLOCATED;
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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_tb_store_table
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*
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* PARAMETERS: Address - Table address
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* Table - Table header
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* Length - Table length
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* Flags - flags
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*
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* RETURN: Status and table index.
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*
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* DESCRIPTION: Add an ACPI table to the global table list
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*
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******************************************************************************/
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acpi_status
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acpi_tb_store_table(acpi_physical_address address,
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struct acpi_table_header *table,
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u32 length, u8 flags, u32 *table_index)
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{
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acpi_status status;
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struct acpi_table_desc *new_table;
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/* Ensure that there is room for the table in the Root Table List */
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if (acpi_gbl_root_table_list.current_table_count >=
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acpi_gbl_root_table_list.max_table_count) {
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status = acpi_tb_resize_root_table_list();
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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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new_table =
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&acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.
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current_table_count];
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/* Initialize added table */
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new_table->address = address;
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new_table->pointer = table;
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new_table->length = length;
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new_table->owner_id = 0;
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new_table->flags = flags;
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ACPI_MOVE_32_TO_32(&new_table->signature, table->signature);
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*table_index = acpi_gbl_root_table_list.current_table_count;
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acpi_gbl_root_table_list.current_table_count++;
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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_tb_delete_table
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*
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* PARAMETERS: table_index - Table index
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*
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* RETURN: None
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*
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* DESCRIPTION: Delete one internal ACPI table
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*
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******************************************************************************/
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void acpi_tb_delete_table(struct acpi_table_desc *table_desc)
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{
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/* Table must be mapped or allocated */
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if (!table_desc->pointer) {
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return;
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}
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switch (table_desc->flags & ACPI_TABLE_ORIGIN_MASK) {
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case ACPI_TABLE_ORIGIN_MAPPED:
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acpi_os_unmap_memory(table_desc->pointer, table_desc->length);
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break;
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case ACPI_TABLE_ORIGIN_ALLOCATED:
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ACPI_FREE(table_desc->pointer);
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break;
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default:;
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}
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table_desc->pointer = NULL;
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_tb_terminate
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*
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* PARAMETERS: None
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*
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* RETURN: None
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*
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* DESCRIPTION: Delete all internal ACPI tables
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*
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******************************************************************************/
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void acpi_tb_terminate(void)
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{
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u32 i;
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ACPI_FUNCTION_TRACE(tb_terminate);
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(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
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/* Delete the individual tables */
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for (i = 0; i < acpi_gbl_root_table_list.current_table_count; i++) {
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acpi_tb_delete_table(&acpi_gbl_root_table_list.tables[i]);
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}
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/*
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* Delete the root table array if allocated locally. Array cannot be
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* mapped, so we don't need to check for that flag.
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*/
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if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
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ACPI_FREE(acpi_gbl_root_table_list.tables);
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}
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acpi_gbl_root_table_list.tables = NULL;
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acpi_gbl_root_table_list.flags = 0;
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acpi_gbl_root_table_list.current_table_count = 0;
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "ACPI Tables freed\n"));
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(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_tb_delete_namespace_by_owner
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*
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* PARAMETERS: table_index - Table index
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*
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* RETURN: Status
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*
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* DESCRIPTION: Delete all namespace objects created when this table was loaded.
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*
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******************************************************************************/
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acpi_status acpi_tb_delete_namespace_by_owner(u32 table_index)
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{
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acpi_owner_id owner_id;
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acpi_status status;
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ACPI_FUNCTION_TRACE(tb_delete_namespace_by_owner);
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status = acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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if (table_index >= acpi_gbl_root_table_list.current_table_count) {
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/* The table index does not exist */
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(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
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return_ACPI_STATUS(AE_NOT_EXIST);
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}
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/* Get the owner ID for this table, used to delete namespace nodes */
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owner_id = acpi_gbl_root_table_list.tables[table_index].owner_id;
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(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
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/*
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* Need to acquire the namespace writer lock to prevent interference
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* with any concurrent namespace walks. The interpreter must be
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* released during the deletion since the acquisition of the deletion
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* lock may block, and also since the execution of a namespace walk
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* must be allowed to use the interpreter.
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*/
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(void)acpi_ut_release_mutex(ACPI_MTX_INTERPRETER);
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status = acpi_ut_acquire_write_lock(&acpi_gbl_namespace_rw_lock);
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acpi_ns_delete_namespace_by_owner(owner_id);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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acpi_ut_release_write_lock(&acpi_gbl_namespace_rw_lock);
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status = acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER);
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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_tb_allocate_owner_id
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*
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* PARAMETERS: table_index - Table index
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*
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* RETURN: Status
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*
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* DESCRIPTION: Allocates owner_id in table_desc
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*
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******************************************************************************/
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acpi_status acpi_tb_allocate_owner_id(u32 table_index)
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{
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acpi_status status = AE_BAD_PARAMETER;
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ACPI_FUNCTION_TRACE(tb_allocate_owner_id);
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(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
|
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if (table_index < acpi_gbl_root_table_list.current_table_count) {
|
|
status = acpi_ut_allocate_owner_id
|
|
(&(acpi_gbl_root_table_list.tables[table_index].owner_id));
|
|
}
|
|
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_tb_release_owner_id
|
|
*
|
|
* PARAMETERS: table_index - Table index
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Releases owner_id in table_desc
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status acpi_tb_release_owner_id(u32 table_index)
|
|
{
|
|
acpi_status status = AE_BAD_PARAMETER;
|
|
|
|
ACPI_FUNCTION_TRACE(tb_release_owner_id);
|
|
|
|
(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
|
|
if (table_index < acpi_gbl_root_table_list.current_table_count) {
|
|
acpi_ut_release_owner_id(&
|
|
(acpi_gbl_root_table_list.
|
|
tables[table_index].owner_id));
|
|
status = AE_OK;
|
|
}
|
|
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_tb_get_owner_id
|
|
*
|
|
* PARAMETERS: table_index - Table index
|
|
* owner_id - Where the table owner_id is returned
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: returns owner_id for the ACPI table
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status acpi_tb_get_owner_id(u32 table_index, acpi_owner_id *owner_id)
|
|
{
|
|
acpi_status status = AE_BAD_PARAMETER;
|
|
|
|
ACPI_FUNCTION_TRACE(tb_get_owner_id);
|
|
|
|
(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
|
|
if (table_index < acpi_gbl_root_table_list.current_table_count) {
|
|
*owner_id =
|
|
acpi_gbl_root_table_list.tables[table_index].owner_id;
|
|
status = AE_OK;
|
|
}
|
|
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_tb_is_table_loaded
|
|
*
|
|
* PARAMETERS: table_index - Table index
|
|
*
|
|
* RETURN: Table Loaded Flag
|
|
*
|
|
******************************************************************************/
|
|
|
|
u8 acpi_tb_is_table_loaded(u32 table_index)
|
|
{
|
|
u8 is_loaded = FALSE;
|
|
|
|
(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
|
|
if (table_index < acpi_gbl_root_table_list.current_table_count) {
|
|
is_loaded = (u8)
|
|
(acpi_gbl_root_table_list.tables[table_index].flags &
|
|
ACPI_TABLE_IS_LOADED);
|
|
}
|
|
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
|
|
return (is_loaded);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_tb_set_table_loaded_flag
|
|
*
|
|
* PARAMETERS: table_index - Table index
|
|
* is_loaded - TRUE if table is loaded, FALSE otherwise
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Sets the table loaded flag to either TRUE or FALSE.
|
|
*
|
|
******************************************************************************/
|
|
|
|
void acpi_tb_set_table_loaded_flag(u32 table_index, u8 is_loaded)
|
|
{
|
|
|
|
(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
|
|
if (table_index < acpi_gbl_root_table_list.current_table_count) {
|
|
if (is_loaded) {
|
|
acpi_gbl_root_table_list.tables[table_index].flags |=
|
|
ACPI_TABLE_IS_LOADED;
|
|
} else {
|
|
acpi_gbl_root_table_list.tables[table_index].flags &=
|
|
~ACPI_TABLE_IS_LOADED;
|
|
}
|
|
}
|
|
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
|
|
}
|