455 lines
13 KiB
C
455 lines
13 KiB
C
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// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
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/******************************************************************************
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*
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* Module Name: tbxfload - Table load/unload external interfaces
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*
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* Copyright (C) 2000 - 2022, Intel Corp.
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*
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*****************************************************************************/
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#define EXPORT_ACPI_INTERFACES
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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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#include "acevents.h"
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#define _COMPONENT ACPI_TABLES
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ACPI_MODULE_NAME("tbxfload")
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/*******************************************************************************
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*
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* FUNCTION: acpi_load_tables
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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: Load the ACPI tables from the RSDT/XSDT
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*
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******************************************************************************/
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acpi_status ACPI_INIT_FUNCTION acpi_load_tables(void)
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{
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acpi_status status;
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ACPI_FUNCTION_TRACE(acpi_load_tables);
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/*
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* Install the default operation region handlers. These are the
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* handlers that are defined by the ACPI specification to be
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* "always accessible" -- namely, system_memory, system_IO, and
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* PCI_Config. This also means that no _REG methods need to be
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* run for these address spaces. We need to have these handlers
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* installed before any AML code can be executed, especially any
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* module-level code (11/2015).
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* Note that we allow OSPMs to install their own region handlers
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* between acpi_initialize_subsystem() and acpi_load_tables() to use
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* their customized default region handlers.
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*/
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status = acpi_ev_install_region_handlers();
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status,
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"During Region initialization"));
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return_ACPI_STATUS(status);
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}
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/* Load the namespace from the tables */
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status = acpi_tb_load_namespace();
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/* Don't let single failures abort the load */
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if (status == AE_CTRL_TERMINATE) {
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status = AE_OK;
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}
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status,
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"While loading namespace from ACPI tables"));
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}
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/*
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* Initialize the objects in the namespace that remain uninitialized.
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* This runs the executable AML that may be part of the declaration of
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* these name objects:
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* operation_regions, buffer_fields, Buffers, and Packages.
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*
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*/
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status = acpi_ns_initialize_objects();
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if (ACPI_SUCCESS(status)) {
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acpi_gbl_namespace_initialized = TRUE;
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}
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return_ACPI_STATUS(status);
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}
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ACPI_EXPORT_SYMBOL_INIT(acpi_load_tables)
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/*******************************************************************************
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*
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* FUNCTION: acpi_tb_load_namespace
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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: Load the namespace from the DSDT and all SSDTs/PSDTs found in
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* the RSDT/XSDT.
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*
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******************************************************************************/
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acpi_status acpi_tb_load_namespace(void)
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{
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acpi_status status;
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u32 i;
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struct acpi_table_header *new_dsdt;
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struct acpi_table_desc *table;
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u32 tables_loaded = 0;
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u32 tables_failed = 0;
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ACPI_FUNCTION_TRACE(tb_load_namespace);
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(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
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/*
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* Load the namespace. The DSDT is required, but any SSDT and
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* PSDT tables are optional. Verify the DSDT.
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*/
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table = &acpi_gbl_root_table_list.tables[acpi_gbl_dsdt_index];
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if (!acpi_gbl_root_table_list.current_table_count ||
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!ACPI_COMPARE_NAMESEG(table->signature.ascii, ACPI_SIG_DSDT) ||
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ACPI_FAILURE(acpi_tb_validate_table(table))) {
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status = AE_NO_ACPI_TABLES;
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goto unlock_and_exit;
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}
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/*
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* Save the DSDT pointer for simple access. This is the mapped memory
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* address. We must take care here because the address of the .Tables
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* array can change dynamically as tables are loaded at run-time. Note:
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* .Pointer field is not validated until after call to acpi_tb_validate_table.
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*/
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acpi_gbl_DSDT = table->pointer;
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/*
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* Optionally copy the entire DSDT to local memory (instead of simply
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* mapping it.) There are some BIOSs that corrupt or replace the original
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* DSDT, creating the need for this option. Default is FALSE, do not copy
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* the DSDT.
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*/
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if (acpi_gbl_copy_dsdt_locally) {
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new_dsdt = acpi_tb_copy_dsdt(acpi_gbl_dsdt_index);
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if (new_dsdt) {
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acpi_gbl_DSDT = new_dsdt;
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}
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}
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/*
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* Save the original DSDT header for detection of table corruption
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* and/or replacement of the DSDT from outside the OS.
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*/
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memcpy(&acpi_gbl_original_dsdt_header, acpi_gbl_DSDT,
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sizeof(struct acpi_table_header));
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/* Load and parse tables */
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(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
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status = acpi_ns_load_table(acpi_gbl_dsdt_index, acpi_gbl_root_node);
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(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status, "[DSDT] table load failed"));
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tables_failed++;
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} else {
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tables_loaded++;
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}
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/* Load any SSDT or PSDT tables. Note: Loop leaves tables locked */
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for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) {
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table = &acpi_gbl_root_table_list.tables[i];
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if (!table->address ||
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(!ACPI_COMPARE_NAMESEG
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(table->signature.ascii, ACPI_SIG_SSDT)
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&& !ACPI_COMPARE_NAMESEG(table->signature.ascii,
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ACPI_SIG_PSDT)
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&& !ACPI_COMPARE_NAMESEG(table->signature.ascii,
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ACPI_SIG_OSDT))
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|| ACPI_FAILURE(acpi_tb_validate_table(table))) {
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continue;
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}
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/* Ignore errors while loading tables, get as many as possible */
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(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
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status = acpi_ns_load_table(i, acpi_gbl_root_node);
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(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status,
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"(%4.4s:%8.8s) while loading table",
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table->signature.ascii,
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table->pointer->oem_table_id));
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tables_failed++;
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
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"Table [%4.4s:%8.8s] (id FF) - Table namespace load failed\n\n",
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table->signature.ascii,
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table->pointer->oem_table_id));
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} else {
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tables_loaded++;
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}
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}
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if (!tables_failed) {
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ACPI_INFO(("%u ACPI AML tables successfully acquired and loaded", tables_loaded));
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} else {
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ACPI_ERROR((AE_INFO,
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"%u table load failures, %u successful",
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tables_failed, tables_loaded));
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/* Indicate at least one failure */
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status = AE_CTRL_TERMINATE;
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}
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#ifdef ACPI_APPLICATION
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, "\n"));
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#endif
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unlock_and_exit:
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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_install_table
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*
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* PARAMETERS: table - Pointer to the ACPI table to be installed.
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*
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* RETURN: Status
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*
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* DESCRIPTION: Dynamically install an ACPI table.
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* Note: This function should only be invoked after
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* acpi_initialize_tables() and before acpi_load_tables().
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*
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******************************************************************************/
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acpi_status ACPI_INIT_FUNCTION
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acpi_install_table(struct acpi_table_header *table)
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{
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acpi_status status;
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u32 table_index;
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ACPI_FUNCTION_TRACE(acpi_install_table);
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status = acpi_tb_install_standard_table(ACPI_PTR_TO_PHYSADDR(table),
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ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL,
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table, FALSE, FALSE,
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&table_index);
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return_ACPI_STATUS(status);
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}
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ACPI_EXPORT_SYMBOL_INIT(acpi_install_table)
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/*******************************************************************************
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*
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* FUNCTION: acpi_install_physical_table
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*
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* PARAMETERS: address - Address of the ACPI table to be installed.
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*
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* RETURN: Status
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*
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* DESCRIPTION: Dynamically install an ACPI table.
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* Note: This function should only be invoked after
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* acpi_initialize_tables() and before acpi_load_tables().
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*
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******************************************************************************/
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acpi_status ACPI_INIT_FUNCTION
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acpi_install_physical_table(acpi_physical_address address)
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{
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acpi_status status;
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u32 table_index;
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ACPI_FUNCTION_TRACE(acpi_install_physical_table);
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status = acpi_tb_install_standard_table(address,
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ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL,
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NULL, FALSE, FALSE,
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&table_index);
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return_ACPI_STATUS(status);
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}
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ACPI_EXPORT_SYMBOL_INIT(acpi_install_physical_table)
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/*******************************************************************************
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*
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* FUNCTION: acpi_load_table
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*
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* PARAMETERS: table - Pointer to a buffer containing the ACPI
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* table to be loaded.
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* table_idx - Pointer to a u32 for storing the table
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* index, might be NULL
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*
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* RETURN: Status
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*
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* DESCRIPTION: Dynamically load an ACPI table from the caller's buffer. Must
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* be a valid ACPI table with a valid ACPI table header.
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* Note1: Mainly intended to support hotplug addition of SSDTs.
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* Note2: Does not copy the incoming table. User is responsible
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* to ensure that the table is not deleted or unmapped.
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*
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******************************************************************************/
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acpi_status acpi_load_table(struct acpi_table_header *table, u32 *table_idx)
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{
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acpi_status status;
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u32 table_index;
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ACPI_FUNCTION_TRACE(acpi_load_table);
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/* Parameter validation */
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if (!table) {
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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/* Install the table and load it into the namespace */
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ACPI_INFO(("Host-directed Dynamic ACPI Table Load:"));
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status = acpi_tb_install_and_load_table(ACPI_PTR_TO_PHYSADDR(table),
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ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL,
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table, FALSE, &table_index);
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if (table_idx) {
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*table_idx = table_index;
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}
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if (ACPI_SUCCESS(status)) {
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/* Complete the initialization/resolution of new objects */
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acpi_ns_initialize_objects();
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}
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return_ACPI_STATUS(status);
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}
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ACPI_EXPORT_SYMBOL(acpi_load_table)
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/*******************************************************************************
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*
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* FUNCTION: acpi_unload_parent_table
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*
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* PARAMETERS: object - Handle to any namespace object owned by
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* the table to be unloaded
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*
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* RETURN: Status
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*
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* DESCRIPTION: Via any namespace object within an SSDT or OEMx table, unloads
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* the table and deletes all namespace objects associated with
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* that table. Unloading of the DSDT is not allowed.
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* Note: Mainly intended to support hotplug removal of SSDTs.
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*
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******************************************************************************/
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acpi_status acpi_unload_parent_table(acpi_handle object)
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{
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struct acpi_namespace_node *node =
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ACPI_CAST_PTR(struct acpi_namespace_node, object);
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acpi_status status = AE_NOT_EXIST;
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acpi_owner_id owner_id;
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u32 i;
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ACPI_FUNCTION_TRACE(acpi_unload_parent_table);
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/* Parameter validation */
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if (!object) {
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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/*
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* The node owner_id is currently the same as the parent table ID.
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* However, this could change in the future.
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*/
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owner_id = node->owner_id;
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if (!owner_id) {
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/* owner_id==0 means DSDT is the owner. DSDT cannot be unloaded */
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return_ACPI_STATUS(AE_TYPE);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Must acquire the table lock during this operation */
|
||
|
|
|
||
|
|
status = acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
|
||
|
|
if (ACPI_FAILURE(status)) {
|
||
|
|
return_ACPI_STATUS(status);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Find the table in the global table list */
|
||
|
|
|
||
|
|
for (i = 0; i < acpi_gbl_root_table_list.current_table_count; i++) {
|
||
|
|
if (owner_id != acpi_gbl_root_table_list.tables[i].owner_id) {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Allow unload of SSDT and OEMx tables only. Do not allow unload
|
||
|
|
* of the DSDT. No other types of tables should get here, since
|
||
|
|
* only these types can contain AML and thus are the only types
|
||
|
|
* that can create namespace objects.
|
||
|
|
*/
|
||
|
|
if (ACPI_COMPARE_NAMESEG
|
||
|
|
(acpi_gbl_root_table_list.tables[i].signature.ascii,
|
||
|
|
ACPI_SIG_DSDT)) {
|
||
|
|
status = AE_TYPE;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
|
||
|
|
status = acpi_tb_unload_table(i);
|
||
|
|
(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
|
||
|
|
return_ACPI_STATUS(status);
|
||
|
|
}
|
||
|
|
|
||
|
|
ACPI_EXPORT_SYMBOL(acpi_unload_parent_table)
|
||
|
|
/*******************************************************************************
|
||
|
|
*
|
||
|
|
* FUNCTION: acpi_unload_table
|
||
|
|
*
|
||
|
|
* PARAMETERS: table_index - Index as returned by acpi_load_table
|
||
|
|
*
|
||
|
|
* RETURN: Status
|
||
|
|
*
|
||
|
|
* DESCRIPTION: Via the table_index representing an SSDT or OEMx table, unloads
|
||
|
|
* the table and deletes all namespace objects associated with
|
||
|
|
* that table. Unloading of the DSDT is not allowed.
|
||
|
|
* Note: Mainly intended to support hotplug removal of SSDTs.
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
acpi_status acpi_unload_table(u32 table_index)
|
||
|
|
{
|
||
|
|
acpi_status status;
|
||
|
|
|
||
|
|
ACPI_FUNCTION_TRACE(acpi_unload_table);
|
||
|
|
|
||
|
|
if (table_index == 1) {
|
||
|
|
|
||
|
|
/* table_index==1 means DSDT is the owner. DSDT cannot be unloaded */
|
||
|
|
|
||
|
|
return_ACPI_STATUS(AE_TYPE);
|
||
|
|
}
|
||
|
|
|
||
|
|
status = acpi_tb_unload_table(table_index);
|
||
|
|
return_ACPI_STATUS(status);
|
||
|
|
}
|
||
|
|
|
||
|
|
ACPI_EXPORT_SYMBOL(acpi_unload_table)
|